Rewrite git-sync into focused packages · Entire
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Rewrite git-sync into focused packages
0520b7c→main·
Soph·3mo ago·39 files·+7,196 added/-3,981 removed
Break the monolithic syncer.go (3143 lines) into 7 focused packages:
- internal/gitproto: pkt-line, smart HTTP, capability negotiation, v1/v2 fetch/push - internal/planner: mapping validation, planning, relay eligibility, checkpoints - internal/auth: credential resolution, Entire DB tokens, git credential helper - internal/strategy/bootstrap: one-shot + batched bootstrap, GitHub preflight - internal/strategy/incremental: incremental relay execution - internal/strategy/materialized: materialized fallback push with size guard - internal/syncer: slim orchestrator (734 lines), stats, measurement
Addresses all 22 issues from docs/rewrite-issue-list.md:
Correctness: tag ref creation independent of pack (#1), duplicate target mapping rejection (#2), cross-kind mapping rejection (#3), sideband-64k preference (#4), pack reader close discipline (#5), include-tag capability gating (#6), OAuth refresh error propagation (#7).
Concurrency: mutex-protected stats (#8), bounded response reads (#9), flock-based file token store locking (#10).
Architecture: package decomposition (#11), shared session setup (#12), explicit Params structs (#13).
Performance: commit-count batch sizing heuristic (#14), materialized object count guard (#15), bounded ancestry checks with ErrAncestryDepthExceeded (#16), reusable pkt-line buffer (#17).
Testing: 73 test functions, 7 benchmarks, coverage 41-58% on core packages. Protocol malformed-input tests (#18-20), behavioral edge cases (#21), benchmarks for planning/protocol hot paths (#22).
Co-Authored-By: Claude Opus 4.6 (1M context) noreply@anthropic.com
Sessions
27633b8ca595View transcript
Changes
39
internal
auth
Aauth.go+119
Aauth_test.go+550
Aentiredb.go+229
Atokenstore.go+142
gitproto
Abenchmark_test.go+88
Acapability.go+129
Acapability_test.go+186
Aconvert.go+64
Aconvert_test.go+211
Afetch.go+427
Afetch_helpers_test.go+163
Afetch_test.go+217
Apktline.go+155
Apktline_test.go+379
Apush.go+192
Arefs.go+188
Arefs_test.go+130
Asmarthttp.go+149
Asmarthttp_test.go+78
planner
Abenchmark_test.go+137
Acheckpoint.go+161
Amapping.go+85
Aplanner.go+395
Aplanner_test.go+756
Arelay.go+101
Atypes.go+236
strategy
bootstrap
Abootstrap.go+528
Abootstrap_test.go+112
incremental
Aincremental.go+92
materialized
Amaterialized.go+107
syncer
Mauth_test.go+48/-47
Mgit_http_backend_test.go+18/-8
Mintegration_test.go+11/-8
Ameasurement.go+83
Dprotocol_v2.go-782
Dprotocol_v2_test.go-117
Astats.go+148
Msyncer.go+373/-2803
Msyncer_test.go+9/-216
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package auth
import (
"context"
"fmt"
"os/exec"
"strings"
"github.com/go-git/go-git/v5/plumbing/transport"
transporthttp "github.com/go-git/go-git/v5/plumbing/transport/http"
)
// Endpoint holds the authentication-related fields for a remote.
type Endpoint struct {
Username string
Token string
BearerToken string
SkipTLSVerify bool
}
// Resolve resolves the auth method for the given endpoint configuration.
// Order: explicit flags → Entire DB token → git credential helper → anonymous.
func Resolve(raw Endpoint, ep *transport.Endpoint) (transport.AuthMethod, error) {
if auth := explicitAuth(raw); auth != nil {
return auth, nil
}
if ep == nil {
return nil, nil
}
if ep.Protocol != "http" && ep.Protocol != "https" {
return nil, nil
}
if username, password, ok, err := LookupEntireDBCredential(raw, ep); err != nil {
return nil, err // issue #7: surface refresh failure explicitly
} else if ok {
return &transporthttp.BasicAuth{Username: username, Password: password}, nil
}
if username, password, ok := lookupGitCredential(ep); ok {
return &transporthttp.BasicAuth{Username: username, Password: password}, nil
}
return nil, nil
}
func explicitAuth(raw Endpoint) transport.AuthMethod {
if raw.BearerToken != "" {
return &transporthttp.TokenAuth{Token: raw.BearerToken}
}
if raw.Token != "" {
username := raw.Username
if username == "" {
username = "git"
}
return &transporthttp.BasicAuth{Username: username, Password: raw.Token}
}
return nil
}
// GitCredentialFillCommand is replaceable for testing.
var GitCredentialFillCommand = func(ctx context.Context, input string) ([]byte, error) {
cmd := exec.CommandContext(ctx, "git", "credential", "fill")
cmd.Stdin = strings.NewReader(input)
return cmd.Output()
}
func lookupGitCredential(ep *transport.Endpoint) (string, string, bool) {
input := credentialFillInput(ep)
if input == "" {
return "", "", false
}
output, err := GitCredentialFillCommand(context.Background(), input)
if err != nil {
return "", "", false
}
values := parseCredentialOutput(output)
password := values["password"]
if password == "" {
return "", "", false
}
username := values["username"]
if username == "" {
if ep.User != "" {
username = ep.User
} else {
username = "git"
}
}
return username, password, true
}
func credentialFillInput(ep *transport.Endpoint) string {
if ep == nil || ep.Host == "" {
return ""
}
var b strings.Builder
fmt.Fprintf(&b, "protocol=%s\nhost=%s\n", ep.Protocol, ep.Host)
if path := strings.TrimPrefix(ep.Path, "/"); path != "" {
fmt.Fprintf(&b, "path=%s\n", path)
}
if ep.User != "" {
fmt.Fprintf(&b, "username=%s\n", ep.User)
}
b.WriteString("\n")
return b.String()
}
func parseCredentialOutput(output []byte) map[string]string {
values := map[string]string{}
for _, line := range strings.Split(string(output), "\n") {
line = strings.TrimSpace(line)
if line == "" {
continue
}
k, v, ok := strings.Cut(line, "=")
if ok {
values[k] = v
}
}
return values
}
Ainternal/auth/auth.go+119
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package auth
import (
"context"
"errors"
"fmt"
"os"
"path/filepath"
"testing"
"time"
"github.com/go-git/go-git/v5/plumbing/transport"
transporthttp "github.com/go-git/go-git/v5/plumbing/transport/http"
"github.com/zalando/go-keyring"
)
func TestDecodeTokenWithExpiration(t *testing.T) {
tests := []struct {
name string
encoded string
wantToken string
wantZero bool // if true, expect time.Time zero value
wantUnix int64 // checked only when wantZero is false
}{
{
name: "token with pipe-separated unix timestamp",
encoded: "mytoken|12345",
wantToken: "mytoken",
wantUnix: 12345,
},
{
name: "plain token without pipe",
encoded: "plain-token",
wantToken: "plain-token",
wantZero: true,
},
{
name: "empty string",
encoded: "",
wantToken: "",
wantZero: true,
},
{
name: "pipe with non-numeric suffix falls back to full string",
encoded: "tok|notanumber",
wantToken: "tok|notanumber",
wantZero: true,
},
{
name: "multiple pipes uses last one",
encoded: "a|b|99999",
wantToken: "a|b",
wantUnix: 99999,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
token, ts := decodeTokenWithExpiration(tt.encoded)
if token != tt.wantToken {
t.Errorf("token = %q, want %q", token, tt.wantToken)
}
if tt.wantZero {
if !ts.IsZero() {
t.Errorf("expected zero time, got %v", ts)
}
} else {
if ts.Unix() != tt.wantUnix {
t.Errorf("timestamp = %d, want %d", ts.Unix(), tt.wantUnix)
}
}
})
}
}
func TestTokenExpiredOrExpiring(t *testing.T) {
tests := []struct {
name string
expiresAt time.Time
want bool
}{
{
name: "zero time is treated as expired",
expiresAt: time.Time{},
want: true,
},
{
name: "far future is not expired",
expiresAt: time.Now().Add(1 * time.Hour),
want: false,
},
{
name: "past time is expired",
expiresAt: time.Now().Add(-1 * time.Hour),
want: true,
},
{
name: "expiring within 5 minute window is treated as expired",
expiresAt: time.Now().Add(2 * time.Minute),
want: true,
},
{
name: "just beyond 5 minute window is not expired",
expiresAt: time.Now().Add(10 * time.Minute),
want: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := tokenExpiredOrExpiring(tt.expiresAt)
if got != tt.want {
t.Errorf("tokenExpiredOrExpiring(%v) = %v, want %v", tt.expiresAt, got, tt.want)
}
})
}
}
func TestCredentialFillInput(t *testing.T) {
ep := &transport.Endpoint{
Protocol: "https",
Host: "github.com",
Path: "/owner/repo.git",
User: "myuser",
}
got := credentialFillInput(ep)
want := "protocol=https\nhost=github.com\npath=owner/repo.git\nusername=myuser\n\n"
if got != want {
t.Errorf("credentialFillInput returned:\n%q\nwant:\n%q", got, want)
}
}
func TestCredentialFillInputNilEndpoint(t *testing.T) {
got := credentialFillInput(nil)
if got != "" {
t.Errorf("expected empty string for nil endpoint, got %q", got)
}
}
func TestCredentialFillInputEmptyHost(t *testing.T) {
ep := &transport.Endpoint{Protocol: "https"}
got := credentialFillInput(ep)
if got != "" {
t.Errorf("expected empty string for empty host, got %q", got)
}
}
func TestCredentialFillInputNoUser(t *testing.T) {
ep := &transport.Endpoint{
Protocol: "https",
Host: "example.com",
Path: "/repo.git",
}
got := credentialFillInput(ep)
want := "protocol=https\nhost=example.com\npath=repo.git\n\n"
if got != want {
t.Errorf("credentialFillInput returned:\n%q\nwant:\n%q", got, want)
}
}
func TestParseCredentialOutput(t *testing.T) {
tests := []struct {
name string
output string
wantUser string
wantPass string
wantLen int
}{
{
name: "standard username and password",
output: "username=foo\npassword=bar\n",
wantUser: "foo",
wantPass: "bar",
wantLen: 2,
},
{
name: "with extra fields",
output: "protocol=https\nhost=example.com\nusername=alice\npassword=secret\n",
wantUser: "alice",
wantPass: "secret",
wantLen: 4,
},
{
name: "empty input",
output: "",
wantLen: 0,
},
{
name: "blank lines only",
output: "\n\n\n",
wantLen: 0,
},
{
name: "value with equals sign",
output: "password=tok=en\n",
wantPass: "tok=en",
wantLen: 1,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := parseCredentialOutput([]byte(tt.output))
if len(got) != tt.wantLen {
t.Errorf("len(result) = %d, want %d; result = %v", len(got), tt.wantLen, got)
}
if tt.wantUser != "" {
if got["username"] != tt.wantUser {
t.Errorf("username = %q, want %q", got["username"], tt.wantUser)
}
}
if tt.wantPass != "" {
if got["password"] != tt.wantPass {
t.Errorf("password = %q, want %q", got["password"], tt.wantPass)
}
}
})
}
}
func TestResolve(t *testing.T) {
ep, err := transport.NewEndpoint("https://example.com/repo.git")
if err != nil {
t.Fatal(err)
}
sshEP := &transport.Endpoint{Protocol: "ssh", Host: "example.com", Path: "/repo.git"}
tests := []struct {
name string
raw Endpoint
ep *transport.Endpoint
mockCred func(ctx context.Context, input string) ([]byte, error)
wantType string // "token", "basic", "nil"
wantUser string
wantPass string
wantErr bool
}{
{
name: "bearer token set returns TokenAuth",
raw: Endpoint{BearerToken: "my-bearer"},
ep: ep,
wantType: "token",
wantPass: "my-bearer",
},
{
name: "token with username returns BasicAuth",
raw: Endpoint{Token: "my-token", Username: "alice"},
ep: ep,
wantType: "basic",
wantUser: "alice",
wantPass: "my-token",
},
{
name: "token without username returns BasicAuth with git",
raw: Endpoint{Token: "my-token"},
ep: ep,
wantType: "basic",
wantUser: "git",
wantPass: "my-token",
},
{
name: "nothing set non-HTTP endpoint returns nil",
raw: Endpoint{},
ep: sshEP,
wantType: "nil",
},
{
name: "nothing set HTTP endpoint no credential helper returns nil",
raw: Endpoint{},
ep: ep,
mockCred: func(ctx context.Context, input string) ([]byte, error) {
return nil, fmt.Errorf("no helper")
},
wantType: "nil",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// Save and restore GitCredentialFillCommand.
origCmd := GitCredentialFillCommand
defer func() { GitCredentialFillCommand = origCmd }()
if tt.mockCred != nil {
GitCredentialFillCommand = tt.mockCred
} else {
// Default mock: no credential helper.
GitCredentialFillCommand = func(ctx context.Context, input string) ([]byte, error) {
return nil, fmt.Errorf("no helper")
}
}
// Also ensure ENTIRE_CONFIG_DIR points nowhere so EntireDB lookup
// doesn't find anything.
t.Setenv("ENTIRE_CONFIG_DIR", t.TempDir())
got, err := Resolve(tt.raw, tt.ep)
if tt.wantErr {
if err == nil {
t.Fatal("expected error, got nil")
}
return
}
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
switch tt.wantType {
case "nil":
if got != nil {
t.Errorf("expected nil auth, got %T", got)
}
case "token":
ta, ok := got.(*transporthttp.TokenAuth)
if !ok {
t.Fatalf("expected *TokenAuth, got %T", got)
}
if ta.Token != tt.wantPass {
t.Errorf("token = %q, want %q", ta.Token, tt.wantPass)
}
case "basic":
ba, ok := got.(*transporthttp.BasicAuth)
if !ok {
t.Fatalf("expected *BasicAuth, got %T", got)
}
if ba.Username != tt.wantUser {
t.Errorf("username = %q, want %q", ba.Username, tt.wantUser)
}
if ba.Password != tt.wantPass {
t.Errorf("password = %q, want %q", ba.Password, tt.wantPass)
}
}
})
}
}
func TestExplicitAuth(t *testing.T) {
tests := []struct {
name string
raw Endpoint
wantType string // "token", "basic", "nil"
wantUser string
wantPass string
}{
{
name: "bearer token returns TokenAuth",
raw: Endpoint{BearerToken: "bearer-abc"},
wantType: "token",
wantPass: "bearer-abc",
},
{
name: "token with username returns BasicAuth",
raw: Endpoint{Token: "tok", Username: "bob"},
wantType: "basic",
wantUser: "bob",
wantPass: "tok",
},
{
name: "token without username returns BasicAuth with git",
raw: Endpoint{Token: "tok"},
wantType: "basic",
wantUser: "git",
wantPass: "tok",
},
{
name: "nothing set returns nil",
raw: Endpoint{},
wantType: "nil",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := explicitAuth(tt.raw)
switch tt.wantType {
case "nil":
if got != nil {
t.Errorf("expected nil, got %T", got)
}
case "token":
ta, ok := got.(*transporthttp.TokenAuth)
if !ok {
t.Fatalf("expected *TokenAuth, got %T", got)
}
if ta.Token != tt.wantPass {
t.Errorf("token = %q, want %q", ta.Token, tt.wantPass)
}
case "basic":
ba, ok := got.(*transporthttp.BasicAuth)
if !ok {
t.Fatalf("expected *BasicAuth, got %T", got)
}
if ba.Username != tt.wantUser {
t.Errorf("username = %q, want %q", ba.Username, tt.wantUser)
}
if ba.Password != tt.wantPass {
t.Errorf("password = %q, want %q", ba.Password, tt.wantPass)
}
}
})
}
}
func TestEndpointBaseURL(t *testing.T) {
tests := []struct {
name string
ep *transport.Endpoint
want string
}{
{
name: "https host",
ep: &transport.Endpoint{Protocol: "https", Host: "example.com"},
want: "https://example.com",
},
{
name: "http host with port",
ep: &transport.Endpoint{Protocol: "http", Host: "example.com", Port: 8080},
want: "http://example.com:8080",
},
{
name: "nil endpoint",
ep: nil,
want: "",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := endpointBaseURL(tt.ep)
if got != tt.want {
t.Errorf("endpointBaseURL() = %q, want %q", got, tt.want)
}
})
}
}
func TestEndpointCredentialHost(t *testing.T) {
tests := []struct {
name string
ep *transport.Endpoint
want string
}{
{
name: "host without port",
ep: &transport.Endpoint{Host: "example.com"},
want: "example.com",
},
{
name: "host with port",
ep: &transport.Endpoint{Host: "example.com", Port: 8080},
want: "example.com:8080",
},
{
name: "nil endpoint",
ep: nil,
want: "",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := endpointCredentialHost(tt.ep)
if got != tt.want {
t.Errorf("endpointCredentialHost() = %q, want %q", got, tt.want)
}
})
}
}
func TestReadWriteFileToken(t *testing.T) {
dir := t.TempDir()
path := filepath.Join(dir, "tokens.json")
// Write a token and read it back.
if err := writeFileToken(path, "svc1", "user1", "pass1"); err != nil {
t.Fatalf("writeFileToken: %v", err)
}
got, err := readFileToken(path, "svc1", "user1")
if err != nil {
t.Fatalf("readFileToken: %v", err)
}
if got != "pass1" {
t.Errorf("readFileToken = %q, want %q", got, "pass1")
}
// Read missing service returns ErrNotFound.
_, err = readFileToken(path, "missing-svc", "user1")
if !errors.Is(err, keyring.ErrNotFound) {
t.Errorf("expected ErrNotFound for missing service, got %v", err)
}
// Write a second service and read each back.
if err := writeFileToken(path, "svc2", "user2", "pass2"); err != nil {
t.Fatalf("writeFileToken svc2: %v", err)
}
got1, err := readFileToken(path, "svc1", "user1")
if err != nil {
t.Fatalf("readFileToken svc1 after second write: %v", err)
}
if got1 != "pass1" {
t.Errorf("svc1 token = %q, want %q", got1, "pass1")
}
got2, err := readFileToken(path, "svc2", "user2")
if err != nil {
t.Fatalf("readFileToken svc2: %v", err)
}
if got2 != "pass2" {
t.Errorf("svc2 token = %q, want %q", got2, "pass2")
}
// Read file that doesn't exist returns ErrNotFound.
_, err = readFileToken(filepath.Join(dir, "nonexistent.json"), "svc1", "user1")
if !errors.Is(err, keyring.ErrNotFound) {
t.Errorf("expected ErrNotFound for missing file, got %v", err)
}
}
func TestIsNotFound(t *testing.T) {
if !isNotFound(keyring.ErrNotFound) {
t.Error("expected isNotFound(keyring.ErrNotFound) = true")
}
if isNotFound(fmt.Errorf("some other error")) {
t.Error("expected isNotFound(other error) = false")
}
// Wrapped ErrNotFound should also be detected.
wrapped := fmt.Errorf("wrapped: %w", keyring.ErrNotFound)
if !isNotFound(wrapped) {
t.Error("expected isNotFound(wrapped ErrNotFound) = true")
}
}
func TestReadFileTokenEmptyPath(t *testing.T) {
_, err := readFileToken("", "svc", "user")
if !errors.Is(err, keyring.ErrNotFound) {
t.Errorf("expected ErrNotFound for empty path, got %v", err)
}
}
func TestWriteFileTokenEmptyPath(t *testing.T) {
err := writeFileToken("", "svc", "user", "pass")
if err == nil {
t.Error("expected error for empty path, got nil")
}
if !errors.Is(err, os.ErrInvalid) {
t.Errorf("expected os.ErrInvalid, got %v", err)
}
}
Ainternal/auth/auth_test.go+550
package auth
import ( "context" "crypto/tls" "encoding/json" "errors" "fmt" "net/http" "net/url" "os" "path/filepath" "strconv" "strings" "time"
"github.com/go-git/go-git/v5/plumbing/transport" "github.com/zalando/go-keyring" )
func isNotFound(err error) bool { return errors.Is(err, keyring.ErrNotFound) }
const entireCLIClientID = "entire-cli"
type entireAuthHostInfo struct {
ActiveUser string json:"activeUser"
Users []string json:"users"
}
type oauthTokenResponse struct {
AccessToken string json:"access_token"
RefreshToken string json:"refresh_token"
ExpiresIn int64 json:"expires_in"
}
// LookupEntireDBCredential looks up credentials from the Entire token store. // Returns (username, password, true, nil) on success, ("", "", false, nil) when // no credential is configured, or ("", "", false, err) when a credential exists // but refresh failed (issue #7). func LookupEntireDBCredential(raw Endpoint, ep *transport.Endpoint) (string, string, bool, error) { if ep == nil || ep.Host == "" { return "", "", false, nil } credHost := endpointCredentialHost(ep) token, err := lookupEntireDBToken(credHost, endpointBaseURL(ep), raw.SkipTLSVerify) if err != nil { return "", "", false, err } if token == "" { return "", "", false, nil } username := raw.Username if username == "" { username = "git" } return username, token, true, nil }
func endpointBaseURL(ep *transport.Endpoint) string { if ep == nil || ep.Host == "" { return "" } scheme := ep.Protocol if scheme == "" { scheme = "https" } host := ep.Host if ep.Port > 0 { host = fmt.Sprintf("%s:%d", host, ep.Port) } return scheme + "://" + host }
func endpointCredentialHost(ep *transport.Endpoint) string { if ep == nil { return "" } if ep.Port > 0 { return fmt.Sprintf("%s:%d", ep.Host, ep.Port) } return ep.Host }
func lookupEntireDBToken(host, baseURL string, skipTLS bool) (string, error) { configDir := os.Getenv("ENTIRE_CONFIG_DIR") if configDir == "" { home, err := os.UserHomeDir() if err != nil { return "", nil // no config dir, not an error } configDir = filepath.Join(home, ".config", "entire") }
username, ok := loadEntireDBActiveUser(host, configDir) if !ok || username == "" { return "", nil } return getTokenWithRefresh(context.Background(), host, username, baseURL, skipTLS) }
func loadEntireDBActiveUser(host, configDir string) (string, bool) { data, err := os.ReadFile(filepath.Join(configDir, "hosts.json")) if err != nil { return "", false } var hosts map[string]*entireAuthHostInfo if err := json.Unmarshal(data, &hosts); err != nil { return "", false } info := hosts[host] if info == nil || info.ActiveUser == "" { return "", false } return info.ActiveUser, true }
// getTokenWithRefresh retrieves a token, refreshing it if expired. // On refresh failure, returns the stale token with a nil error rather than // propagating the refresh error silently (issue #7). func getTokenWithRefresh(ctx context.Context, host, username, baseURL string, skipTLS bool) (string, error) { encoded, err := ReadStoredToken(credentialService(host), username) if err != nil { // "Not found" means no credential is configured — not an error. // Only propagate actual storage failures. if isNotFound(err) { return "", nil } return "", err } token, expiresAt := decodeTokenWithExpiration(encoded) if token == "" { return "", nil } if !tokenExpiredOrExpiring(expiresAt) { return token, nil } refreshed, err := refreshAccessToken(ctx, host, username, baseURL, skipTLS) if err != nil { // Issue #7: surface refresh failure explicitly instead of silently reusing stale token. return "", fmt.Errorf("token expired and refresh failed for %s@%s: %w", username, host, err) } return refreshed, nil }
func decodeTokenWithExpiration(encoded string) (string, time.Time) { idx := strings.LastIndex(encoded, "|") if idx == -1 { return encoded, time.Time{} } token := encoded[:idx] ts, err := strconv.ParseInt(encoded[idx+1:], 10, 64) if err != nil { return encoded, time.Time{} } return token, time.Unix(ts, 0) }
func tokenExpiredOrExpiring(expiresAt time.Time) bool { if expiresAt.IsZero() { return true } return time.Now().Add(5 * time.Minute).After(expiresAt) }
func refreshAccessToken(ctx context.Context, host, username, baseURL string, skipTLS bool) (string, error) { refreshToken, err := ReadStoredToken(credentialService(host)+":refresh", username) if err != nil { return "", err } if refreshToken == "" || baseURL == "" { return "", errors.New("missing refresh token or base url") }
form := url.Values{} form.Set("grant_type", "refresh_token") form.Set("refresh_token", refreshToken) form.Set("client_id", entireCLIClientID)
req, err := http.NewRequestWithContext(ctx, http.MethodPost, strings.TrimRight(baseURL, "/")+"/oauth/token", strings.NewReader(form.Encode())) if err != nil { return "", err } req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
client := &http.Client{ Timeout: 30 * time.Second, Transport: &http.Transport{ TLSClientConfig: &tls.Config{InsecureSkipVerify: skipTLS}, //nolint:gosec }, } resp, err := client.Do(req) if err != nil { return "", err } defer resp.Body.Close() if resp.StatusCode != http.StatusOK { return "", fmt.Errorf("refresh failed with status %d", resp.StatusCode) }
var tokenResp oauthTokenResponse if err := json.NewDecoder(resp.Body).Decode(&tokenResp); err != nil { return "", err } if tokenResp.AccessToken == "" { return "", errors.New("empty access token in refresh response") }
if err := WriteStoredToken( credentialService(host), username, encodeTokenWithExpiration(tokenResp.AccessToken, tokenResp.ExpiresIn), ); err != nil { return "", err } if tokenResp.RefreshToken != "" { _ = WriteStoredToken(credentialService(host)+":refresh", username, tokenResp.RefreshToken) } return tokenResp.AccessToken, nil }
func encodeTokenWithExpiration(token string, expiresIn int64) string { return fmt.Sprintf("%s|%d", token, time.Now().Unix()+expiresIn) }
func credentialService(host string) string { return "entire:" + host }
Ainternal/auth/entiredb.go+229
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package auth
import ( "encoding/json" "os" "path/filepath" "syscall"
"github.com/zalando/go-keyring" )
// ReadStoredToken reads a token from the configured store (keyring or file). func ReadStoredToken(service, username string) (string, error) { if os.Getenv("ENTIRE_TOKEN_STORE") == "file" { return readFileToken(fileTokenPath(), service, username) } return keyring.Get(service, username) }
// WriteStoredToken writes a token to the configured store. func WriteStoredToken(service, username, password string) error { if os.Getenv("ENTIRE_TOKEN_STORE") == "file" { return writeFileToken(fileTokenPath(), service, username, password) } return keyring.Set(service, username, password) }
func fileTokenPath() string { path := os.Getenv("ENTIRE_TOKEN_STORE_PATH") if path != "" { return path } home, err := os.UserHomeDir() if err != nil { return "" } return filepath.Join(home, ".config", "entiredb", "tokens.json") }
func readFileToken(path, service, username string) (string, error) { if path == "" { return "", keyring.ErrNotFound } // Acquire shared lock for concurrent read safety (issue #10). unlock, err := flockShared(path) if err != nil { // If we can't lock (e.g., file doesn't exist yet), fall through to direct read. return readFileTokenDirect(path, service, username) } defer unlock() return readFileTokenDirect(path, service, username) }
func readFileTokenDirect(path, service, username string) (string, error) { data, err := os.ReadFile(path) if err != nil { if os.IsNotExist(err) { return "", keyring.ErrNotFound } return "", err } var store map[string]map[string]string if err := json.Unmarshal(data, &store); err != nil { return "", err } users := store[service] if users == nil { return "", keyring.ErrNotFound } password, ok := users[username] if !ok { return "", keyring.ErrNotFound } return password, nil }
// writeFileToken writes a token to the file store with exclusive file locking // to prevent corruption from concurrent processes (issue #10). func writeFileToken(path, service, username, password string) error { if path == "" { return os.ErrInvalid } if err := os.MkdirAll(filepath.Dir(path), 0o700); err != nil { return err }
// Acquire exclusive lock for the write. unlock, err := flockExclusive(path) if err != nil { return err } defer unlock()
// Re-read under lock to avoid lost updates. store := map[string]map[string]string{} if data, err := os.ReadFile(path); err == nil { if err := json.Unmarshal(data, &store); err != nil { return err } } else if !os.IsNotExist(err) { return err } if store[service] == nil { store[service] = map[string]string{} } store[service][username] = password data, err := json.Marshal(store) if err != nil { return err } // Atomic write: write to temp file then rename to prevent corruption on crash. tmp := path + ".tmp" if err := os.WriteFile(tmp, data, 0o600); err != nil { return err } return os.Rename(tmp, path) }
// flockShared acquires a shared (read) lock on path+".lock". func flockShared(path string) (func(), error) { return flockOpen(path+".lock", syscall.LOCK_SH) }
// flockExclusive acquires an exclusive (write) lock on path+".lock". func flockExclusive(path string) (func(), error) { return flockOpen(path+".lock", syscall.LOCK_EX) }
func flockOpen(lockPath string, how int) (func(), error) { f, err := os.OpenFile(lockPath, os.O_CREATE|os.O_RDWR, 0o600) if err != nil { return nil, err } if err := syscall.Flock(int(f.Fd()), how); err != nil { f.Close() return nil, err } return func() { _ = syscall.Flock(int(f.Fd()), syscall.LOCK_UN) f.Close() }, nil }
Ainternal/auth/tokenstore.go+142
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package gitproto
import ( "bytes" "fmt" "strings" "testing" )
func BenchmarkPacketReaderData(b *testing.B) { // Build a wire-format buffer containing 1000 data packets. // Each packet is "0009data\n" (4-byte length + "data\n" = 9 bytes total). var wire strings.Builder const packetCount = 1000 payload := "data\n" pkt := FormatPktLine(payload) for i := 0; i < packetCount; i++ { wire.WriteString(pkt) } wire.WriteString("0000") // flush to terminate data := wire.String()
b.ResetTimer() for i := 0; i < b.N; i++ { reader := NewPacketReader(bytes.NewBufferString(data)) for j := 0; j < packetCount; j++ { kind, p, err := reader.ReadPacket() if err != nil { b.Fatal(err) } if kind != PacketData || len(p) == 0 { b.Fatalf("unexpected packet: kind=%v len=%d", kind, len(p)) } } // Read the trailing flush. kind, _, err := reader.ReadPacket() if err != nil { b.Fatal(err) } if kind != PacketFlush { b.Fatalf("expected flush, got %v", kind) } } }
func BenchmarkDecodeV2Capabilities(b *testing.B) { // Build a capability advertisement with 10 capabilities. var wire strings.Builder wire.WriteString(FormatPktLine("version 2\n")) for i := 0; i < 10; i++ { line := fmt.Sprintf("capability-%d=value-%d\n", i, i) wire.WriteString(FormatPktLine(line)) } wire.WriteString("0000") // flush data := wire.String()
b.ResetTimer() for i := 0; i < b.N; i++ { caps, err := DecodeV2Capabilities(bytes.NewBufferString(data)) if err != nil { b.Fatal(err) } if len(caps.Caps) != 10 { b.Fatalf("expected 10 capabilities, got %d", len(caps.Caps)) } } }
func BenchmarkEncodeCommand(b *testing.B) { // Build a fetch command with 50 wants. capArgs := []string{"agent=git-sync/bench"} cmdArgs := make([]string, 0, 52) cmdArgs = append(cmdArgs, "ofs-delta", "no-progress") for i := 0; i < 50; i++ { cmdArgs = append(cmdArgs, fmt.Sprintf("want %040x", i+1)) }
b.ResetTimer() for i := 0; i < b.N; i++ { data, err := EncodeCommand("fetch", capArgs, cmdArgs) if err != nil { b.Fatal(err) } if len(data) == 0 { b.Fatal("empty encoded command") } } }
Ainternal/gitproto/benchmark\_test.go+88
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package gitproto
import ( "fmt" "io" "sort" "strings"
"github.com/go-git/go-git/v5/plumbing/protocol/packp/capability" )
// V2Capabilities represents a parsed protocol v2 capability advertisement. type V2Capabilities struct { Caps map[string]string }
// Supports reports whether the server advertises the named capability. func (c *V2Capabilities) Supports(name string) bool { if c == nil { return false } _, ok := c.Caps[name] return ok }
// Value returns the value string for the named capability. func (c *V2Capabilities) Value(name string) string { if c == nil { return "" } return c.Caps[name] }
// FetchSupports checks whether a specific feature is listed in the // "fetch" capability value (space-separated feature list). func (c *V2Capabilities) FetchSupports(feature string) bool { if c == nil { return false } for _, f := range strings.Fields(c.Value("fetch")) { if f == feature { return true } } return false }
// SortedKeys returns the capabilities as sorted "key" or "key=value" strings. func (c *V2Capabilities) SortedKeys() []string { if c == nil { return nil } keys := make([]string, 0, len(c.Caps)) for k, v := range c.Caps { if v == "" { keys = append(keys, k) } else { keys = append(keys, k+"="+v) } } sort.Strings(keys) return keys }
// RequestCapabilities builds the capability arguments for a v2 command request. func (c *V2Capabilities) RequestCapabilities() []string { var caps []string if agent := c.Value("agent"); agent != "" { caps = append(caps, "agent="+capability.DefaultAgent()) } return caps }
// DecodeV2Capabilities parses a protocol v2 capability advertisement from an // info/refs response body. func DecodeV2Capabilities(r io.Reader) (*V2Capabilities, error) { reader := NewPacketReader(r)
// Skip service line and find "version 2\n" for { kind, payload, err := reader.ReadPacket() if err != nil { return nil, err } if kind == PacketFlush { continue } if kind != PacketData { return nil, fmt.Errorf("unexpected packet type %v before protocol advertisement", kind) } if strings.HasPrefix(string(payload), "# service=") { continue } if string(payload) != "version 2\n" { return nil, fmt.Errorf("unexpected protocol advertisement %q", payload) } break }
caps := &V2Capabilities{Caps: make(map[string]string)} for { kind, payload, err := reader.ReadPacket() if err != nil { return nil, err } if kind == PacketFlush { return caps, nil } if kind != PacketData { return nil, fmt.Errorf("unexpected packet type %v in capability advertisement", kind) } line := strings.TrimSuffix(string(payload), "\n") name, value, _ := strings.Cut(line, "=") caps.Caps[name] = value } }
// PreferredSideband returns the best sideband capability supported by the // server. Prefers sideband-64k over sideband (issue #4: sideband preference // was backwards in original code). func PreferredSideband(caps *capability.List) capability.Capability { if caps.Supports(capability.Sideband64k) { return capability.Sideband64k } if caps.Supports(capability.Sideband) { return capability.Sideband } return "" }
Ainternal/gitproto/capability.go+129
package gitproto
import (
"testing"
"github.com/go-git/go-git/v5/plumbing/protocol/packp/capability"
)
func TestV2CapabilitiesFetchSupports(t *testing.T) {
caps := &V2Capabilities{
Caps: map[string]string{
"fetch": "thin-pack filter",
"agent": "git/test",
},
}
tests := []struct {
feature string
want bool
}{
{"filter", true},
{"thin-pack", true},
{"missing", false},
{"thin", false},
{"", false},
}
for _, tt := range tests {
t.Run(tt.feature, func(t *testing.T) {
got := caps.FetchSupports(tt.feature)
if got != tt.want {
t.Errorf("FetchSupports(%q) = %v, want %v", tt.feature, got, tt.want)
}
})
}
// nil receiver should always return false.
var nilCaps *V2Capabilities
if nilCaps.FetchSupports("filter") {
t.Error("nil V2Capabilities.FetchSupports should return false")
}
}
func TestV2CapabilitiesSortedKeys(t *testing.T) {
caps := &V2Capabilities{
Caps: map[string]string{
"fetch": "shallow",
"ls-refs": "",
"agent": "git/test",
},
}
got := caps.SortedKeys()
want := []string{
"agent=git/test",
"fetch=shallow",
"ls-refs",
}
if len(got) != len(want) {
t.Fatalf("SortedKeys() returned %d items, want %d", len(got), len(want))
}
for i := range got {
if got[i] != want[i] {
t.Errorf("SortedKeys()[%d] = %q, want %q", i, got[i], want[i])
}
}
// nil receiver should return nil.
var nilCaps *V2Capabilities
if keys := nilCaps.SortedKeys(); keys != nil {
t.Errorf("nil V2Capabilities.SortedKeys() = %v, want nil", keys)
}
}
func TestV2CapabilitiesSupportsAndValue(t *testing.T) {
caps := &V2Capabilities{
Caps: map[string]string{
"fetch": "shallow",
"ls-refs": "",
},
}
if !caps.Supports("fetch") {
t.Error("expected Supports(fetch) = true")
}
if !caps.Supports("ls-refs") {
t.Error("expected Supports(ls-refs) = true")
}
if caps.Supports("push") {
t.Error("expected Supports(push) = false")
}
if got := caps.Value("fetch"); got != "shallow" {
t.Errorf("Value(fetch) = %q, want %q", got, "shallow")
}
if got := caps.Value("ls-refs"); got != "" {
t.Errorf("Value(ls-refs) = %q, want empty", got)
}
if got := caps.Value("push"); got != "" {
t.Errorf("Value(push) = %q, want empty", got)
}
// nil receiver tests.
var nilCaps *V2Capabilities
if nilCaps.Supports("fetch") {
t.Error("nil V2Capabilities.Supports should return false")
}
if got := nilCaps.Value("fetch"); got != "" {
t.Errorf("nil V2Capabilities.Value should return empty, got %q", got)
}
}
func TestPreferredSideband(t *testing.T) {
tests := []struct {
name string
caps []capability.Capability
want capability.Capability
}{
{
name: "both supported prefers 64k",
caps: []capability.Capability{capability.Sideband, capability.Sideband64k},
want: capability.Sideband64k,
},
{
name: "only sideband",
caps: []capability.Capability{capability.Sideband},
want: capability.Sideband,
},
{
name: "only sideband64k",
caps: []capability.Capability{capability.Sideband64k},
want: capability.Sideband64k,
},
{
name: "neither supported",
caps: []capability.Capability{capability.NoProgress},
want: "",
},
{
name: "empty capabilities",
caps: nil,
want: "",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
list := capability.NewList()
for _, c := range tt.caps {
_ = list.Set(c)
}
got := PreferredSideband(list)
if got != tt.want {
t.Errorf("PreferredSideband() = %q, want %q", got, tt.want)
}
})
}
}
func TestRequestCapabilities(t *testing.T) {
// With agent set, RequestCapabilities should return an agent line.
caps := &V2Capabilities{
Caps: map[string]string{
"agent": "git/test",
"ls-refs": "",
},
}
got := caps.RequestCapabilities()
if len(got) != 1 {
t.Fatalf("RequestCapabilities() returned %d items, want 1", len(got))
}
if got[0] != "agent="+capability.DefaultAgent() {
t.Errorf("RequestCapabilities()[0] = %q, want %q", got[0], "agent="+capability.DefaultAgent())
}
// Without agent, RequestCapabilities should return empty.
capsNoAgent := &V2Capabilities{
Caps: map[string]string{
"ls-refs": "",
"fetch": "shallow",
},
}
got = capsNoAgent.RequestCapabilities()
if len(got) != 0 {
t.Errorf("RequestCapabilities() without agent returned %d items, want 0", len(got))
}
}
Ainternal/gitproto/capability_test.go+186
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package gitproto
import (
"fmt"
"io"
"github.com/go-git/go-git/v5/plumbing"
)
// PlannerDesired is the subset of planner.DesiredRef fields needed by gitproto.
// This avoids a circular import between gitproto and planner.
type PlannerDesired struct {
SourceRef plumbing.ReferenceName
TargetRef plumbing.ReferenceName
SourceHash plumbing.Hash
IsTag bool
}
// ToPushCommands converts a slice of plan-like structs to PushCommands.
// Used by all strategy packages to avoid copy-pasting the conversion.
func ToPushCommands(plans []PushPlan) []PushCommand {
cmds := make([]PushCommand, 0, len(plans))
for _, p := range plans {
cmd := PushCommand{Name: p.TargetRef, Old: p.TargetHash}
if p.Delete {
cmd.Delete = true
} else {
cmd.New = p.SourceHash
}
cmds = append(cmds, cmd)
}
return cmds
}
// PushPlan is a minimal interface for plan-to-command conversion.
type PushPlan struct {
TargetRef plumbing.ReferenceName
TargetHash plumbing.Hash
SourceHash plumbing.Hash
Delete bool
}
// LimitPackReader wraps a ReadCloser with a byte limit. Shared across strategies.
func LimitPackReader(r io.ReadCloser, maxBytes int64) io.ReadCloser {
if maxBytes <= 0 {
return r
}
return &packLimitRC{ReadCloser: r, max: maxBytes}
}
type packLimitRC struct {
io.ReadCloser
max int64
read int64
}
func (r *packLimitRC) Read(p []byte) (int, error) {
n, err := r.ReadCloser.Read(p)
r.read += int64(n)
if r.read > r.max {
return n, fmt.Errorf("source pack exceeded max-pack-bytes limit (%d)", r.max)
}
return n, err
}
Ainternal/gitproto/convert.go+64
package gitproto
import ( "io" "strings" "testing"
"github.com/go-git/go-git/v5/plumbing" )
func TestToPushCommands(t *testing.T) { hashA := plumbing.NewHash("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa") hashB := plumbing.NewHash("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb")
tests := []struct { name string plan PushPlan wantNew plumbing.Hash wantOld plumbing.Hash wantDelete bool }{ { name: "create command", plan: PushPlan{ TargetRef: "refs/heads/main", TargetHash: plumbing.ZeroHash, SourceHash: hashA, }, wantNew: hashA, wantOld: plumbing.ZeroHash, }, { name: "update command", plan: PushPlan{ TargetRef: "refs/heads/main", TargetHash: hashA, SourceHash: hashB, }, wantNew: hashB, wantOld: hashA, }, { name: "delete command", plan: PushPlan{ TargetRef: "refs/heads/old-branch", TargetHash: hashA, Delete: true, }, wantOld: hashA, wantDelete: true, }, }
for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { cmds := ToPushCommands([]PushPlan{tt.plan}) if len(cmds) != 1 { t.Fatalf("expected 1 command, got %d", len(cmds)) } cmd := cmds[0] if cmd.Name != tt.plan.TargetRef { t.Errorf("Name = %s, want %s", cmd.Name, tt.plan.TargetRef) } if cmd.Old != tt.wantOld { t.Errorf("Old = %s, want %s", cmd.Old, tt.wantOld) } if cmd.Delete != tt.wantDelete { t.Errorf("Delete = %v, want %v", cmd.Delete, tt.wantDelete) } if !tt.wantDelete && cmd.New != tt.wantNew { t.Errorf("New = %s, want %s", cmd.New, tt.wantNew) } }) } }
func TestToPushCommandsMultiple(t *testing.T) { plans := []PushPlan{ {TargetRef: "refs/heads/a", SourceHash: plumbing.NewHash("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")}, {TargetRef: "refs/heads/b", SourceHash: plumbing.NewHash("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb")}, {TargetRef: "refs/heads/c", TargetHash: plumbing.NewHash("cccccccccccccccccccccccccccccccccccccccc"), Delete: true}, } cmds := ToPushCommands(plans) if len(cmds) != 3 { t.Fatalf("expected 3 commands, got %d", len(cmds)) } }
func TestToPushCommandsEmpty(t *testing.T) { cmds := ToPushCommands(nil) if len(cmds) != 0 { t.Fatalf("expected 0 commands for nil input, got %d", len(cmds)) } }
func TestLimitPackReaderWithinLimit(t *testing.T) { data := "hello world" rc := io.NopCloser(strings.NewReader(data)) limited := LimitPackReader(rc, 1024) defer limited.Close()
got, err := io.ReadAll(limited) if err != nil { t.Fatalf("unexpected error: %v", err) } if string(got) != data { t.Errorf("got %q, want %q", got, data) } }
func TestLimitPackReaderExceedsLimit(t *testing.T) { data := "this is more than ten bytes of data" rc := io.NopCloser(strings.NewReader(data)) limited := LimitPackReader(rc, 10) defer limited.Close()
_, err := io.ReadAll(limited) if err == nil { t.Fatal("expected error when exceeding limit, got nil") } if !strings.Contains(err.Error(), "source pack exceeded max-pack-bytes limit") { t.Errorf("unexpected error message: %v", err) } }
func TestLimitPackReaderZeroLimitPassesThrough(t *testing.T) { data := "unlimited data" rc := io.NopCloser(strings.NewReader(data)) limited := LimitPackReader(rc, 0) defer limited.Close()
got, err := io.ReadAll(limited) if err != nil { t.Fatalf("unexpected error: %v", err) } if string(got) != data { t.Errorf("got %q, want %q", got, data) } }
func TestLimitPackReaderNegativeLimitPassesThrough(t *testing.T) { data := "unlimited data" rc := io.NopCloser(strings.NewReader(data)) limited := LimitPackReader(rc, -1) defer limited.Close()
got, err := io.ReadAll(limited) if err != nil { t.Fatalf("unexpected error: %v", err) } if string(got) != data { t.Errorf("got %q, want %q", got, data) } }
func TestSortedUniqueHashes(t *testing.T) { hashA := plumbing.NewHash("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa") hashB := plumbing.NewHash("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb") hashC := plumbing.NewHash("cccccccccccccccccccccccccccccccccccccccc")
tests := []struct { name string input []plumbing.Hash want []plumbing.Hash }{ { name: "deduplicates repeated hashes", input: []plumbing.Hash{hashA, hashB, hashA, hashC, hashB}, want: []plumbing.Hash{hashA, hashB, hashC}, }, { name: "already sorted and unique is unchanged", input: []plumbing.Hash{hashA, hashB, hashC}, want: []plumbing.Hash{hashA, hashB, hashC}, }, { name: "reverse order gets sorted", input: []plumbing.Hash{hashC, hashB, hashA}, want: []plumbing.Hash{hashA, hashB, hashC}, }, { name: "single element", input: []plumbing.Hash{hashB}, want: []plumbing.Hash{hashB}, }, { name: "empty input", input: []plumbing.Hash{}, want: []plumbing.Hash{}, }, { name: "nil input", input: nil, want: []plumbing.Hash{}, }, }
for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { got := SortedUniqueHashes(tt.input) if len(got) != len(tt.want) { t.Fatalf("len = %d, want %d", len(got), len(tt.want)) } for i := range got { if got[i] != tt.want[i] { t.Errorf("index %d: got %s, want %s", i, got[i], tt.want[i]) } } }) } }
Ainternal/gitproto/convert\_test.go+211
package gitproto
import (
"context"
"errors"
"fmt"
"io"
"strings"
git "github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/format/packfile"
"github.com/go-git/go-git/v5/plumbing/protocol/packp"
"github.com/go-git/go-git/v5/plumbing/protocol/packp/capability"
"github.com/go-git/go-git/v5/plumbing/protocol/packp/sideband"
"github.com/go-git/go-git/v5/plumbing/storer"
"github.com/go-git/go-git/v5/plumbing/transport"
"github.com/go-git/go-git/v5/utils/ioutil"
)
// DesiredRef describes a single ref we want to fetch from source.
type DesiredRef struct {
SourceRef plumbing.ReferenceName
TargetRef plumbing.ReferenceName
SourceHash plumbing.Hash
IsTag bool
}
// FetchToStore fetches objects from source into the given store, using the
// appropriate protocol version.
func (s *RefService) FetchToStore(
ctx context.Context,
store storer.Storer,
conn *Conn,
desired map[plumbing.ReferenceName]DesiredRef,
targetRefs map[plumbing.ReferenceName]plumbing.Hash,
) error {
switch s.Protocol {
case "v2":
return fetchToStoreV2(ctx, store, conn, s.V2Caps, desired, targetRefs)
case "v1":
return fetchToStoreV1(ctx, store, conn, s.V1Adv, desired, targetRefs)
default:
return fmt.Errorf("unsupported source protocol %q", s.Protocol)
}
}
// FetchPack fetches a packfile from source and returns the pack stream as a reader.
// Caller must close the returned ReadCloser.
func (s *RefService) FetchPack(
ctx context.Context,
conn *Conn,
desired map[plumbing.ReferenceName]DesiredRef,
targetRefs map[plumbing.ReferenceName]plumbing.Hash,
) (io.ReadCloser, error) {
switch s.Protocol {
case "v2":
return fetchPackV2(ctx, conn, s.V2Caps, desired, targetRefs)
case "v1":
return fetchPackV1(ctx, conn, s.V1Adv, desired, targetRefs)
default:
return nil, fmt.Errorf("unsupported source protocol %q", s.Protocol)
}
}
// FetchCommitGraph fetches only the commit graph (tree:0 filter) for a ref.
// Requires v2 with filter support.
func (s *RefService) FetchCommitGraph(
ctx context.Context,
store storer.Storer,
conn *Conn,
ref DesiredRef,
) error {
if s.Protocol != "v2" {
return fmt.Errorf("commit graph fetch requires protocol v2")
}
if !s.V2Caps.FetchSupports("filter") {
return fmt.Errorf("source does not advertise fetch filter support")
}
cmdArgs := []string{
"ofs-delta",
"no-progress",
"filter tree:0",
"want " + ref.SourceHash.String(),
"done",
}
body, err := EncodeCommand("fetch", s.V2Caps.RequestCapabilities(), cmdArgs)
if err != nil {
return err
}
reader, err := PostRPCStream(ctx, conn, transport.UploadPackServiceName, body, true, "upload-pack fetch")
if err != nil {
return err
}
defer ioutil.CheckClose(reader, &err)
return storeV2FetchPack(store, reader)
}
// Capabilities returns the sorted capability list for display.
func (s *RefService) Capabilities() []string {
switch s.Protocol {
case "v2":
return s.V2Caps.SortedKeys()
case "v1":
return AdvRefsCaps(s.V1Adv)
default:
return nil
}
}
// --- V2 fetch implementation ---
func fetchToStoreV2(
ctx context.Context,
store storer.Storer,
conn *Conn,
caps *V2Capabilities,
desired map[plumbing.ReferenceName]DesiredRef,
targetRefs map[plumbing.ReferenceName]plumbing.Hash,
) error {
wants := collectWants(desired)
haves := SortedUniqueHashes(refValues(targetRefs))
if len(wants) == 0 {
return git.NoErrAlreadyUpToDate
}
cmdArgs := make([]string, 0, len(wants)+len(haves)+4)
cmdArgs = append(cmdArgs, "ofs-delta", "no-progress")
for _, h := range wants {
cmdArgs = append(cmdArgs, "want "+h.String())
}
for _, h := range haves {
cmdArgs = append(cmdArgs, "have "+h.String())
}
cmdArgs = append(cmdArgs, "done")
body, err := EncodeCommand("fetch", caps.RequestCapabilities(), cmdArgs)
if err != nil {
return err
}
reader, err := PostRPCStream(ctx, conn, transport.UploadPackServiceName, body, true, "upload-pack fetch")
if err != nil {
return err
}
defer ioutil.CheckClose(reader, &err)
return storeV2FetchPack(store, reader)
}
func fetchPackV2(
ctx context.Context,
conn *Conn,
caps *V2Capabilities,
desired map[plumbing.ReferenceName]DesiredRef,
targetRefs map[plumbing.ReferenceName]plumbing.Hash,
) (io.ReadCloser, error) {
wants := collectWants(desired)
haves := SortedUniqueHashes(refValues(targetRefs))
if len(wants) == 0 {
return nil, git.NoErrAlreadyUpToDate
}
cmdArgs := make([]string, 0, len(wants)+len(haves)+4)
cmdArgs = append(cmdArgs, "ofs-delta", "no-progress")
// Only request include-tag if the server supports it (issue #6).
if hasTag(desired) && caps.FetchSupports("include-tag") {
cmdArgs = append(cmdArgs, "include-tag")
}
for _, h := range wants {
cmdArgs = append(cmdArgs, "want "+h.String())
}
for _, h := range haves {
cmdArgs = append(cmdArgs, "have "+h.String())
}
cmdArgs = append(cmdArgs, "done")
body, err := EncodeCommand("fetch", caps.RequestCapabilities(), cmdArgs)
if err != nil {
return nil, err
}
reader, err := PostRPCStream(ctx, conn, transport.UploadPackServiceName, body, true, "upload-pack fetch")
if err != nil {
return nil, err
}
packStream, err := openV2PackStream(reader)
if err != nil {
_ = reader.Close()
return nil, err
}
return packStream, nil
}
func storeV2FetchPack(store storer.Storer, r io.Reader) error {
reader := NewPacketReader(r)
for {
kind, payload, err := reader.ReadPacket()
if err != nil {
if errors.Is(err, io.EOF) {
return nil
}
return fmt.Errorf("decode protocol v2 fetch response: %w", err)
}
switch kind {
case PacketFlush:
return nil
case PacketDelim, PacketResponseEnd:
continue
case PacketData:
line := string(payload)
switch line {
case "packfile\n":
demux := sideband.NewDemuxer(sideband.Sideband64k, reader.BufReader())
return packfile.UpdateObjectStorage(store, demux)
case "acknowledgments\n", "shallow-info\n":
if err := SkipSection(reader); err != nil {
return err
}
default:
return fmt.Errorf("unexpected protocol v2 fetch section %q", strings.TrimSpace(line))
}
}
}
}
func openV2PackStream(body io.ReadCloser) (io.ReadCloser, error) {
reader := NewPacketReader(body)
for {
kind, payload, err := reader.ReadPacket()
if err != nil {
if errors.Is(err, io.EOF) {
return nil, io.ErrUnexpectedEOF
}
return nil, fmt.Errorf("decode protocol v2 fetch response: %w", err)
}
switch kind {
case PacketFlush:
return nil, io.ErrUnexpectedEOF
case PacketDelim, PacketResponseEnd:
continue
case PacketData:
line := string(payload)
switch line {
case "packfile\n":
return &wrappedRC{
Reader: sideband.NewDemuxer(sideband.Sideband64k, reader.BufReader()),
Closer: body,
}, nil
case "acknowledgments\n", "shallow-info\n":
if err := SkipSection(reader); err != nil {
return nil, err
}
default:
return nil, fmt.Errorf("unexpected protocol v2 fetch section %q", strings.TrimSpace(line))
}
}
}
}
// --- V1 fetch implementation ---
func fetchToStoreV1(
ctx context.Context,
store storer.Storer,
conn *Conn,
adv *packp.AdvRefs,
desired map[plumbing.ReferenceName]DesiredRef,
targetRefs map[plumbing.ReferenceName]plumbing.Hash,
) error {
session, err := conn.Transport.NewUploadPackSession(conn.Endpoint, conn.Auth)
if err != nil {
return fmt.Errorf("open source upload-pack session: %w", err)
}
defer session.Close()
req := packp.NewUploadPackRequestFromCapabilities(adv.Capabilities)
for _, ref := range desired {
req.Wants = append(req.Wants, ref.SourceHash)
}
req.Wants = SortedUniqueHashes(req.Wants)
req.Haves = SortedUniqueHashes(refValues(targetRefs))
if len(req.Wants) == 0 {
return git.NoErrAlreadyUpToDate
}
if adv.Capabilities.Supports(capability.NoProgress) {
_ = req.Capabilities.Set(capability.NoProgress)
}
if hasTag(desired) && adv.Capabilities.Supports(capability.IncludeTag) {
_ = req.Capabilities.Set(capability.IncludeTag)
}
reader, err := session.UploadPack(ctx, req)
if err != nil {
if errors.Is(err, transport.ErrEmptyUploadPackRequest) {
return git.NoErrAlreadyUpToDate
}
return fmt.Errorf("source upload-pack: %w", err)
}
defer ioutil.CheckClose(reader, &err)
sbReader := buildSidebandReader(req.Capabilities, reader, nil)
return packfile.UpdateObjectStorage(store, sbReader)
}
func fetchPackV1(
ctx context.Context,
conn *Conn,
adv *packp.AdvRefs,
desired map[plumbing.ReferenceName]DesiredRef,
targetRefs map[plumbing.ReferenceName]plumbing.Hash,
) (io.ReadCloser, error) {
session, err := conn.Transport.NewUploadPackSession(conn.Endpoint, conn.Auth)
if err != nil {
return nil, fmt.Errorf("open source upload-pack session: %w", err)
}
req := packp.NewUploadPackRequestFromCapabilities(adv.Capabilities)
for _, ref := range desired {
req.Wants = append(req.Wants, ref.SourceHash)
}
req.Wants = SortedUniqueHashes(req.Wants)
req.Haves = SortedUniqueHashes(refValues(targetRefs))
if len(req.Wants) == 0 {
_ = session.Close()
return nil, git.NoErrAlreadyUpToDate
}
if adv.Capabilities.Supports(capability.NoProgress) {
_ = req.Capabilities.Set(capability.NoProgress)
}
if hasTag(desired) && adv.Capabilities.Supports(capability.IncludeTag) {
_ = req.Capabilities.Set(capability.IncludeTag)
}
reader, err := session.UploadPack(ctx, req)
if err != nil {
_ = session.Close()
if errors.Is(err, transport.ErrEmptyUploadPackRequest) {
return nil, git.NoErrAlreadyUpToDate
}
return nil, fmt.Errorf("source upload-pack: %w", err)
}
return &sessionRC{
Reader: buildSidebandReader(req.Capabilities, reader, nil),
closeFn: func() error {
_ = reader.Close()
return session.Close()
},
}, nil
}
// buildSidebandReader wraps a reader with sideband demuxing if the negotiated
// capabilities include sideband support. Delegates to PreferredSideband (issue #4).
func buildSidebandReader(caps *capability.List, reader io.Reader, progress sideband.Progress) io.Reader {
sb := PreferredSideband(caps)
if sb == "" {
return reader
}
var t sideband.Type
if sb == capability.Sideband64k {
t = sideband.Sideband64k
} else {
t = sideband.Sideband
}
d := sideband.NewDemuxer(t, reader)
d.Progress = progress
return d
}
// --- helpers ---
func collectWants(desired map[plumbing.ReferenceName]DesiredRef) []plumbing.Hash {
hashes := make([]plumbing.Hash, 0, len(desired))
for _, ref := range desired {
hashes = append(hashes, ref.SourceHash)
}
return SortedUniqueHashes(hashes)
}
func hasTag(desired map[plumbing.ReferenceName]DesiredRef) bool {
for _, ref := range desired {
if ref.IsTag {
return true
}
}
return false
}
func refValues(m map[plumbing.ReferenceName]plumbing.Hash) []plumbing.Hash {
out := make([]plumbing.Hash, 0, len(m))
for _, h := range m {
if !h.IsZero() {
out = append(out, h)
}
}
return out
}
// SortedUniqueHashes deduplicates and sorts a hash slice.
func SortedUniqueHashes(input []plumbing.Hash) []plumbing.Hash {
seen := make(map[plumbing.Hash]bool, len(input))
out := make([]plumbing.Hash, 0, len(input))
for _, h := range input {
if seen[h] {
continue
}
seen[h] = true
out = append(out, h)
}
plumbing.HashesSort(out)
return out
}
type wrappedRC struct {
io.Reader
io.Closer
}
type sessionRC struct {
io.Reader
closeFn func() error
}
func (r *sessionRC) Close() error {
if r.closeFn == nil {
return nil
}
return r.closeFn()
}
Ainternal/gitproto/fetch.go+427
package gitproto
import ( "testing"
"github.com/go-git/go-git/v5/plumbing" )
func TestCollectWants(t *testing.T) { hashA := plumbing.NewHash("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa") hashB := plumbing.NewHash("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb")
tests := []struct { name string desired map[plumbing.ReferenceName]DesiredRef want []plumbing.Hash }{ { name: "empty map", desired: map[plumbing.ReferenceName]DesiredRef{}, want: []plumbing.Hash{}, }, { name: "single ref", desired: map[plumbing.ReferenceName]DesiredRef{ "refs/heads/main": {SourceHash: hashA}, }, want: []plumbing.Hash{hashA}, }, { name: "deduplicated and sorted", desired: map[plumbing.ReferenceName]DesiredRef{ "refs/heads/main": {SourceHash: hashB}, "refs/heads/dev": {SourceHash: hashA}, "refs/heads/dup": {SourceHash: hashB}, // duplicate of main }, want: []plumbing.Hash{hashA, hashB}, // sorted: aa < bb }, }
for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { got := collectWants(tt.desired) if len(got) != len(tt.want) { t.Fatalf("len = %d, want %d", len(got), len(tt.want)) } for i := range got { if got[i] != tt.want[i] { t.Errorf("index %d: got %s, want %s", i, got[i], tt.want[i]) } } }) } }
func TestHasTag(t *testing.T) { hashA := plumbing.NewHash("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
tests := []struct { name string desired map[plumbing.ReferenceName]DesiredRef want bool }{ { name: "empty map", desired: map[plumbing.ReferenceName]DesiredRef{}, want: false, }, { name: "no tags", desired: map[plumbing.ReferenceName]DesiredRef{ "refs/heads/main": {SourceHash: hashA, IsTag: false}, }, want: false, }, { name: "has tag", desired: map[plumbing.ReferenceName]DesiredRef{ "refs/heads/main": {SourceHash: hashA, IsTag: false}, "refs/tags/v1.0.0": {SourceHash: hashA, IsTag: true}, }, want: true, }, { name: "only tags", desired: map[plumbing.ReferenceName]DesiredRef{ "refs/tags/v1.0.0": {SourceHash: hashA, IsTag: true}, }, want: true, }, }
for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { got := hasTag(tt.desired) if got != tt.want { t.Errorf("hasTag() = %v, want %v", got, tt.want) } }) } }
func TestRefValues(t *testing.T) { hashA := plumbing.NewHash("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa") hashB := plumbing.NewHash("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb")
tests := []struct { name string m map[plumbing.ReferenceName]plumbing.Hash want int // expected count of non-zero hashes }{ { name: "empty map", m: map[plumbing.ReferenceName]plumbing.Hash{}, want: 0, }, { name: "all non-zero", m: map[plumbing.ReferenceName]plumbing.Hash{ "refs/heads/main": hashA, "refs/heads/dev": hashB, }, want: 2, }, { name: "some zero", m: map[plumbing.ReferenceName]plumbing.Hash{ "refs/heads/main": hashA, "refs/heads/new": plumbing.ZeroHash, "refs/heads/another": hashB, }, want: 2, }, { name: "all zero", m: map[plumbing.ReferenceName]plumbing.Hash{ "refs/heads/a": plumbing.ZeroHash, "refs/heads/b": plumbing.ZeroHash, }, want: 0, }, { name: "nil map", m: nil, want: 0, }, }
for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { got := refValues(tt.m) if len(got) != tt.want { t.Fatalf("refValues() returned %d values, want %d", len(got), tt.want) } // Verify none of the returned hashes are zero. for _, h := range got { if h.IsZero() { t.Errorf("refValues() returned zero hash, should be excluded") } } }) } }
Ainternal/gitproto/fetch\_helpers\_test.go+163
package gitproto
import (
"bytes"
"io"
"testing"
"github.com/go-git/go-git/v5/plumbing/protocol/packp"
"github.com/go-git/go-git/v5/plumbing/protocol/packp/capability"
"github.com/go-git/go-git/v5/plumbing/protocol/packp/sideband"
)
func TestCapabilities(t *testing.T) {
// v2 protocol
v2Caps := &V2Capabilities{
Caps: map[string]string{
"fetch": "shallow",
"ls-refs": "",
"agent": "git/test",
},
}
rs := &RefService{Protocol: "v2", V2Caps: v2Caps}
got := rs.Capabilities()
if len(got) != 3 {
t.Fatalf("v2 Capabilities() returned %d items, want 3", len(got))
}
// Should be sorted.
if got[0] != "agent=git/test" {
t.Errorf("v2 Capabilities()[0] = %q, want %q", got[0], "agent=git/test")
}
// v1 protocol
adv := packp.NewAdvRefs()
_ = adv.Capabilities.Set(capability.OFSDelta)
rs = &RefService{Protocol: "v1", V1Adv: adv}
got = rs.Capabilities()
if len(got) == 0 {
t.Fatal("v1 Capabilities() returned empty list")
}
// unknown protocol
rs = &RefService{Protocol: "v99"}
got = rs.Capabilities()
if got != nil {
t.Errorf("unknown protocol Capabilities() = %v, want nil", got)
}
}
func TestBuildSidebandReader(t *testing.T) {
data := "hello world"
reader := bytes.NewBufferString(data)
// No sideband support -- should return the original reader.
caps := capability.NewList()
got := buildSidebandReader(caps, reader, nil)
if got != reader {
t.Error("expected original reader when no sideband capability")
}
// With Sideband64k -- should return a demuxer (different reader).
caps = capability.NewList()
_ = caps.Set(capability.Sideband64k)
got = buildSidebandReader(caps, reader, nil)
if got == reader {
t.Error("expected wrapped reader when Sideband64k is set")
}
// With Sideband (not 64k) -- should return a demuxer.
caps = capability.NewList()
_ = caps.Set(capability.Sideband)
got = buildSidebandReader(caps, reader, nil)
if got == reader {
t.Error("expected wrapped reader when Sideband is set")
}
}
func TestBuildSidebandReaderWithProgress(t *testing.T) {
reader := bytes.NewBufferString("test")
caps := capability.NewList()
_ = caps.Set(capability.Sideband64k)
var progress sideband.Progress = io.Discard
got := buildSidebandReader(caps, reader, progress)
if got == reader {
t.Error("expected wrapped reader when sideband capability is set")
}
}
func TestProgressWriter(t *testing.T) {
w := progressWriter(false)
if w != nil {
t.Error("progressWriter(false) should return nil")
}
w = progressWriter(true)
if w == nil {
t.Error("progressWriter(true) should return non-nil writer")
}
}
func TestSessionRCClose(t *testing.T) {
// With closeFn
called := false
rc := &sessionRC{
Reader: bytes.NewBufferString("data"),
closeFn: func() error {
called = true
return nil
},
}
if err := rc.Close(); err != nil {
t.Fatalf("Close() error: %v", err)
}
if !called {
t.Error("closeFn was not called")
}
// With nil closeFn
rc = &sessionRC{
Reader: bytes.NewBufferString("data"),
closeFn: nil,
}
if err := rc.Close(); err != nil {
t.Fatalf("Close() with nil closeFn error: %v", err)
}
}
func TestDecodeV2LSRefs(t *testing.T) {
// Build a valid ls-refs response:
// Each line: "<hash> <refname>\n"
wire := "" +
FormatPktLine("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa refs/heads/main\n") +
FormatPktLine("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb refs/heads/dev\n") +
"0000" // flush
refs, err := decodeV2LSRefs(bytes.NewReader([]byte(wire)))
if err != nil {
t.Fatalf("decodeV2LSRefs: %v", err)
}
if len(refs) != 2 {
t.Fatalf("expected 2 refs, got %d", len(refs))
}
if refs[0].Name().String() != "refs/heads/main" {
t.Errorf("refs[0].Name() = %q, want %q", refs[0].Name(), "refs/heads/main")
}
if refs[0].Hash().String() != "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" {
t.Errorf("refs[0].Hash() = %q", refs[0].Hash())
}
if refs[1].Name().String() != "refs/heads/dev" {
t.Errorf("refs[1].Name() = %q, want %q", refs[1].Name(), "refs/heads/dev")
}
}
func TestDecodeV2LSRefsMalformed(t *testing.T) {
// Line with only one field (no refname).
wire := FormatPktLine("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n") + "0000"
_, err := decodeV2LSRefs(bytes.NewReader([]byte(wire)))
if err == nil {
t.Fatal("expected error for malformed ls-refs line, got nil")
}
}
func TestDecodeV2LSRefsEmpty(t *testing.T) {
// Empty response (just flush).
wire := "0000"
refs, err := decodeV2LSRefs(bytes.NewReader([]byte(wire)))
if err != nil {
t.Fatalf("decodeV2LSRefs: %v", err)
}
if len(refs) != 0 {
t.Fatalf("expected 0 refs, got %d", len(refs))
}
}
func TestBufReader(t *testing.T) {
input := bytes.NewBufferString("test data")
pr := NewPacketReader(input)
br := pr.BufReader()
if br == nil {
t.Fatal("BufReader() returned nil")
}
}
func TestFetchToStoreUnsupportedProtocol(t *testing.T) {
rs := &RefService{Protocol: "v99"}
err := rs.FetchToStore(nil, nil, nil, nil, nil)
if err == nil {
t.Fatal("expected error for unsupported protocol")
}
}
func TestFetchPackUnsupportedProtocol(t *testing.T) {
rs := &RefService{Protocol: "v99"}
_, err := rs.FetchPack(nil, nil, nil, nil)
if err == nil {
t.Fatal("expected error for unsupported protocol")
}
}
func TestFetchCommitGraphRequiresV2(t *testing.T) {
rs := &RefService{Protocol: "v1"}
err := rs.FetchCommitGraph(nil, nil, nil, DesiredRef{})
if err == nil {
t.Fatal("expected error for non-v2 protocol")
}
}
func TestFetchCommitGraphRequiresFilter(t *testing.T) {
caps := &V2Capabilities{
Caps: map[string]string{
"fetch": "shallow",
},
}
rs := &RefService{Protocol: "v2", V2Caps: caps}
err := rs.FetchCommitGraph(nil, nil, nil, DesiredRef{})
if err == nil {
t.Fatal("expected error when filter not supported")
}
}
Ainternal/gitproto/fetch_test.go+217
package gitproto
import ( "bufio" "bytes" "encoding/hex" "fmt" "io"
"github.com/go-git/go-git/v5/plumbing/format/pktline" )
// PacketType represents the type of a pkt-line packet. type PacketType int
const ( PacketData PacketType = iota PacketFlush // 0000 PacketDelim // 0001 PacketResponseEnd // 0002 )
// PacketReader reads pkt-line formatted data. It reuses a fixed header buffer // and a growable payload buffer to reduce allocations (issue #17). type PacketReader struct { r *bufio.Reader header [4]byte buf []byte }
func NewPacketReader(r io.Reader) *PacketReader { if br, ok := r.(*bufio.Reader); ok { return &PacketReader{r: br, buf: make([]byte, 0, 1024)} } return &PacketReader{r: bufio.NewReaderSize(r, 65536), buf: make([]byte, 0, 1024)} }
// BufReader returns the underlying buffered reader for direct access // (needed by sideband demuxer after switching to pack stream). func (pr *PacketReader) BufReader() *bufio.Reader { return pr.r }
// ReadPacket reads the next pkt-line packet. The returned payload slice is // only valid until the next call to ReadPacket. func (pr *PacketReader) ReadPacket() (PacketType, []byte, error) { if _, err := io.ReadFull(pr.r, pr.header[:]); err != nil { return PacketData, nil, err }
switch string(pr.header[:]) { case "0000": return PacketFlush, nil, nil case "0001": return PacketDelim, nil, nil case "0002": return PacketResponseEnd, nil, nil }
n, err := parseHexLength(pr.header) if err != nil { return PacketData, nil, err } if n <= 4 { return PacketData, nil, pktline.ErrInvalidPktLen }
payloadLen := n - 4 if payloadLen > cap(pr.buf) { pr.buf = make([]byte, payloadLen) } else { pr.buf = pr.buf[:payloadLen] } if _, err := io.ReadFull(pr.r, pr.buf); err != nil { return PacketData, nil, err } return PacketData, pr.buf, nil }
func parseHexLength(header [4]byte) (int, error) { var n int for _, b := range header { v, ok := hexVal(b) if !ok { return 0, pktline.ErrInvalidPktLen } n = 16*n + int(v) } return n, nil }
func hexVal(b byte) (byte, bool) { switch { case b >= '0' && b <= '9': return b - '0', true case b >= 'a' && b <= 'f': return b - 'a' + 10, true case b >= 'A' && b <= 'F': return b - 'A' + 10, true default: return 0, false } }
// EncodeCommand builds a pkt-line encoded v2 command request. func EncodeCommand(command string, capArgs, cmdArgs []string) ([]byte, error) { var buf bytes.Buffer enc := pktline.NewEncoder(&buf) if err := enc.EncodeString("command=" + command + "\n"); err != nil { return nil, err } for _, arg := range capArgs { if err := enc.EncodeString(arg + "\n"); err != nil { return nil, err } } if len(cmdArgs) > 0 { if _, err := buf.WriteString("0001"); err != nil { return nil, err } for _, arg := range cmdArgs { if err := enc.EncodeString(arg + "\n"); err != nil { return nil, err } } } if err := enc.Flush(); err != nil { return nil, err } return buf.Bytes(), nil }
// SkipSection reads and discards packets until a delimiter or flush is reached. func SkipSection(pr *PacketReader) error { for { kind, _, err := pr.ReadPacket() if err != nil { return err } if kind == PacketDelim || kind == PacketFlush { return nil } } }
// HashHex is a helper to encode a 20-byte hash as lowercase hex. func HashHex(h [20]byte) string { return hex.EncodeToString(h[:]) }
// FormatPktLine encodes a single pkt-line from a string payload. func FormatPktLine(s string) string { n := len(s) + 4 return fmt.Sprintf("%04x%s", n, s) }
Ainternal/gitproto/pktline.go+155
package gitproto
import (
"bufio"
"bytes"
"io"
"testing"
)
func TestPacketReaderHandlesSpecialPackets(t *testing.T) {
reader := NewPacketReader(bytes.NewBufferString("0000000100020006a\n"))
kind, payload, err := reader.ReadPacket()
if err != nil {
t.Fatalf("read flush: %v", err)
}
if kind != PacketFlush || payload != nil {
t.Fatalf("unexpected flush: kind=%v payload=%q", kind, payload)
}
kind, payload, err = reader.ReadPacket()
if err != nil {
t.Fatalf("read delim: %v", err)
}
if kind != PacketDelim {
t.Fatalf("unexpected delim kind: %v", kind)
}
kind, payload, err = reader.ReadPacket()
if err != nil {
t.Fatalf("read response-end: %v", err)
}
if kind != PacketResponseEnd {
t.Fatalf("unexpected response-end kind: %v", kind)
}
kind, payload, err = reader.ReadPacket()
if err != nil {
t.Fatalf("read data: %v", err)
}
if kind != PacketData || string(payload) != "a\n" {
t.Fatalf("unexpected data: kind=%v payload=%q", kind, payload)
}
}
func TestDecodeV2Capabilities(t *testing.T) {
wire := "" +
"000eversion 2\n" +
"0013ls-refs=unborn\n" +
"0012fetch=shallow\n" +
"0013agent=git/test\n" +
"0000"
caps, err := DecodeV2Capabilities(bytes.NewBufferString(wire))
if err != nil {
t.Fatalf("decode: %v", err)
}
if !caps.Supports("ls-refs") {
t.Fatalf("expected ls-refs capability")
}
if got := caps.Value("fetch"); got != "shallow" {
t.Fatalf("unexpected fetch value %q", got)
}
if got := caps.Value("agent"); got != "git/test" {
t.Fatalf("unexpected agent value %q", got)
}
}
func TestPacketReaderMalformedLength(t *testing.T) {
tests := []struct {
name string
input string
}{
{
name: "non-hex characters",
input: "xxxx",
},
{
name: "partial hex with invalid char",
input: "00gz",
},
{
name: "uppercase non-hex",
input: "ZZZZ",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
reader := NewPacketReader(bytes.NewBufferString(tt.input))
_, _, err := reader.ReadPacket()
if err == nil {
t.Fatal("expected error for malformed hex length, got nil")
}
})
}
}
func TestPacketReaderTruncatedPayload(t *testing.T) {
tests := []struct {
name string
input string
}{
{
name: "header claims 10 bytes total but payload is short",
input: "000aab",
},
{
name: "header claims 8 bytes total but only 1 byte of payload",
input: "0008x",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
reader := NewPacketReader(bytes.NewBufferString(tt.input))
_, _, err := reader.ReadPacket()
if err == nil {
t.Fatal("expected error for truncated payload, got nil")
}
})
}
}
func TestDecodeV2CapabilitiesMissingVersion(t *testing.T) {
tests := []struct {
name string
input string
}{
{
name: "wrong version string",
input: "000eversion 1\n" + "0000",
},
{
name: "no version line at all, just capabilities",
input: "0013ls-refs=unborn\n" + "0000",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
_, err := DecodeV2Capabilities(bytes.NewBufferString(tt.input))
if err == nil {
t.Fatal("expected error for missing version 2 line, got nil")
}
})
}
}
func TestDecodeV2CapabilitiesEmptyFlush(t *testing.T) {
// Flush packet (0000) before the version line should be skipped,
// but if the stream is only flushes with no version line, it should error.
tests := []struct {
name string
input string
wantErr bool
}{
{
name: "flush before version line is skipped",
input: "0000" + "000eversion 2\n" + "0013ls-refs=unborn\n" + "0000",
wantErr: false,
},
{
name: "only flush packets with no data causes EOF",
input: "0000",
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
caps, err := DecodeV2Capabilities(bytes.NewBufferString(tt.input))
if tt.wantErr {
if err == nil {
t.Fatal("expected error, got nil")
}
return
}
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if !caps.Supports("ls-refs") {
t.Fatal("expected ls-refs capability after flush-then-version")
}
})
}
}
func TestEncodeCommand(t *testing.T) {
req, err := EncodeCommand(
"ls-refs",
[]string{"agent=git-sync/test"},
[]string{"peel", "ref-prefix refs/heads/"},
)
if err != nil {
t.Fatalf("encode: %v", err)
}
want := "" +
"0014command=ls-refs\n" +
"0018agent=git-sync/test\n" +
"0001" +
"0009peel\n" +
"001bref-prefix refs/heads/\n" +
"0000"
if string(req) != want {
t.Fatalf("unexpected request:\n%s\nwant:\n%s", req, want)
}
}
func TestEncodeCommandNoArgs(t *testing.T) {
// EncodeCommand with no command args should emit command + cap args +
// flush, with no delimiter section.
req, err := EncodeCommand(
"ls-refs",
[]string{"agent=git-sync/test"},
nil,
)
if err != nil {
t.Fatalf("encode: %v", err)
}
want := "" +
"0014command=ls-refs\n" +
"0018agent=git-sync/test\n" +
"0000"
if string(req) != want {
t.Fatalf("unexpected request:\ngot: %q\nwant: %q", string(req), want)
}
// Verify no delimiter is present in the output.
if bytes.Contains(req, []byte("0001")) {
t.Fatalf("expected no delimiter section when cmdArgs is nil, but found 0001")
}
}
func TestPacketReaderEOF(t *testing.T) {
// Reading from an empty reader should return io.EOF.
reader := NewPacketReader(bytes.NewReader(nil))
_, _, err := reader.ReadPacket()
if err == nil {
t.Fatal("expected error from empty reader, got nil")
}
if err != io.EOF && err != io.ErrUnexpectedEOF {
t.Fatalf("expected io.EOF or io.ErrUnexpectedEOF, got %v", err)
}
}
func TestSkipSection(t *testing.T) {
tests := []struct {
name string
input string
wantErr bool
remainder string
}{
{
name: "data packets followed by delimiter",
// Two data packets then a delimiter (0001), then a trailing data packet.
input: "0009hello" + "0009world" + "0001" + "0008end!",
remainder: "0008end!",
},
{
name: "data packets followed by flush",
// Two data packets then a flush (0000).
input: "0009hello" + "0009world" + "0000",
},
{
name: "EOF before delimiter or flush",
input: "0009hello",
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
buf := bytes.NewBufferString(tt.input)
pr := NewPacketReader(buf)
err := SkipSection(pr)
if tt.wantErr {
if err == nil {
t.Fatal("expected error, got nil")
}
return
}
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
// Verify that the remainder after the section is intact.
if tt.remainder != "" {
kind, payload, err := pr.ReadPacket()
if err != nil {
t.Fatalf("reading remainder: %v", err)
}
if kind != PacketData {
t.Fatalf("expected data packet after skip, got kind=%v", kind)
}
if string(payload) != "end!" {
t.Fatalf("remainder payload = %q, want %q", payload, "end!")
}
}
})
}
}
func TestFormatPktLine(t *testing.T) {
tests := []struct {
input string
want string
}{
{input: "a\n", want: "0006a\n"},
{input: "hello\n", want: "000ahello\n"},
{input: "", want: "0004"},
{input: "version 2\n", want: "000eversion 2\n"},
}
for _, tt := range tests {
got := FormatPktLine(tt.input)
if got != tt.want {
t.Errorf("FormatPktLine(%q) = %q, want %q", tt.input, got, tt.want)
}
}
}
func TestNewPacketReaderWithBufioReader(t *testing.T) {
// When passed a *bufio.Reader, NewPacketReader should reuse it instead
// of wrapping it again.
input := bytes.NewBufferString("0000")
br := bufio.NewReader(input)
pr := NewPacketReader(br)
if pr.BufReader() != br {
t.Error("expected NewPacketReader to reuse the provided *bufio.Reader")
}
kind, _, err := pr.ReadPacket()
if err != nil {
t.Fatalf("ReadPacket error: %v", err)
}
if kind != PacketFlush {
t.Errorf("expected PacketFlush, got %v", kind)
}
}
func TestParseHexLengthUppercase(t *testing.T) {
// Uppercase hex should also parse correctly (hexVal covers A-F).
// 0x000A = 10 total, payload = 10 - 4 = 6 bytes.
wire := "000AABCDEF"
pr := NewPacketReader(bytes.NewBufferString(wire))
kind, payload, err := pr.ReadPacket()
if err != nil {
t.Fatalf("ReadPacket error: %v", err)
}
if kind != PacketData {
t.Fatalf("expected PacketData, got %v", kind)
}
if string(payload) != "ABCDEF" {
t.Errorf("payload = %q, want %q", payload, "ABCDEF")
}
}
func TestHashHex(t *testing.T) {
tests := []struct {
name string
hash [20]byte
want string
}{
{
name: "zero hash",
hash: [20]byte{},
want: "0000000000000000000000000000000000000000",
},
{
name: "known hash",
hash: [20]byte{0xde, 0xad, 0xbe, 0xef, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10},
want: "deadbeef0102030405060708090a0b0c0d0e0f10",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := HashHex(tt.hash)
if got != tt.want {
t.Errorf("HashHex() = %q, want %q", got, tt.want)
}
})
}
}
Ainternal/gitproto/pktline_test.go+379
package gitproto
import ( "context" "fmt" "io" "os"
"github.com/go-git/go-git/v5/plumbing" "github.com/go-git/go-git/v5/plumbing/format/packfile" "github.com/go-git/go-git/v5/plumbing/protocol/packp" "github.com/go-git/go-git/v5/plumbing/protocol/packp/capability" "github.com/go-git/go-git/v5/plumbing/storer" "github.com/go-git/go-git/v5/plumbing/transport" )
// PushCommand represents a single ref update command. type PushCommand struct { Name plumbing.ReferenceName Old plumbing.Hash New plumbing.Hash Delete bool }
// preparePush opens a receive-pack session and builds the base request with // sideband negotiation. Shared by PushObjects, PushPack, and PushCommands. func preparePush( conn *Conn, adv *packp.AdvRefs, commands []PushCommand, verbose bool, ) (transport.ReceivePackSession, *packp.ReferenceUpdateRequest, bool, bool, error) { session, err := conn.Transport.NewReceivePackSession(conn.Endpoint, conn.Auth) if err != nil { return nil, nil, false, false, fmt.Errorf("open target receive-pack session: %w", err) }
req := packp.NewReferenceUpdateRequestFromCapabilities(adv.Capabilities) req.Progress = progressWriter(verbose) if sb := PreferredSideband(adv.Capabilities); sb != "" { _ = req.Capabilities.Set(sb) }
hasDelete := false hasUpdates := false for _, cmd := range commands { c := &packp.Command{Name: cmd.Name, Old: cmd.Old} if cmd.Delete { c.New = plumbing.ZeroHash hasDelete = true } else { c.New = cmd.New hasUpdates = true } req.Commands = append(req.Commands, c) }
if hasDelete { if !adv.Capabilities.Supports(capability.DeleteRefs) { _ = session.Close() return nil, nil, false, false, fmt.Errorf("target does not support delete-refs") } _ = req.Capabilities.Set(capability.DeleteRefs) }
return session, req, hasDelete, hasUpdates, nil }
// PushObjects pushes locally-materialized objects to the target. func PushObjects( ctx context.Context, conn *Conn, adv *packp.AdvRefs, commands []PushCommand, store storer.Storer, hashes []plumbing.Hash, verbose bool, ) error { session, req, _, hasUpdates, err := preparePush(conn, adv, commands, verbose) if err != nil { return err } defer session.Close() return executePush(ctx, session, store, req, hashes, hasUpdates, !adv.Capabilities.Supports(capability.OFSDelta)) }
// PushPack pushes a pack stream (relay) to the target. func PushPack( ctx context.Context, conn *Conn, adv *packp.AdvRefs, commands []PushCommand, pack io.ReadCloser, verbose bool, ) error { // Validate no deletes in pack push before opening session. for _, cmd := range commands { if cmd.Delete { return fmt.Errorf("pack push only supports create and update actions") } }
session, req, _, _, err := preparePush(conn, adv, commands, verbose) if err != nil { return err } defer session.Close()
req.Packfile = pack report, err := session.ReceivePack(ctx, req) if err != nil { _ = pack.Close() return err } if closeErr := pack.Close(); closeErr != nil { return closeErr } if report != nil { return report.Error() } return nil }
// PushCommands sends ref update commands without a pack (for ref-only changes). func PushCommands( ctx context.Context, conn *Conn, adv *packp.AdvRefs, commands []PushCommand, verbose bool, ) error { session, req, _, _, err := preparePush(conn, adv, commands, verbose) if err != nil { return err } defer session.Close() return executePush(ctx, session, nil, req, nil, false, false) }
func executePush( ctx context.Context, session transport.ReceivePackSession, store storer.Storer, req *packp.ReferenceUpdateRequest, hashes []plumbing.Hash, sendPack bool, useRefDeltas bool, ) error { if !sendPack { report, err := session.ReceivePack(ctx, req) if err != nil { return err } if report != nil { return report.Error() } return nil }
rd, wr := io.Pipe() req.Packfile = rd done := make(chan error, 1)
go func() { enc := packfile.NewEncoder(wr, store, useRefDeltas) if _, err := enc.Encode(hashes, 10); err != nil { done <- wr.CloseWithError(err) return } done <- wr.Close() }()
report, err := session.ReceivePack(ctx, req) if err != nil { _ = rd.Close() return err } if err := <-done; err != nil { return err } if report != nil { return report.Error() } return nil }
func progressWriter(verbose bool) io.Writer { if !verbose { return nil } return os.Stderr }
Ainternal/gitproto/push.go+192
package gitproto
import (
"bytes"
"context"
"fmt"
"strings"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/protocol/packp"
"github.com/go-git/go-git/v5/plumbing/transport"
)
// RefService encapsulates the result of source ref discovery and the negotiated
// protocol, providing methods for subsequent fetch and pack operations.
type RefService struct {
Protocol string // "v1" or "v2"
V1Adv *packp.AdvRefs
V2Caps *V2Capabilities
}
// ListSourceRefs discovers refs from the source using the configured protocol mode.
// Returns the list of refs and a RefService for subsequent operations.
func ListSourceRefs(ctx context.Context, conn *Conn, protocolMode string, refPrefixes []string) ([]*plumbing.Reference, *RefService, error) {
switch protocolMode {
case "v1":
adv, refs, err := listSourceRefsV1(ctx, conn)
if err != nil {
return nil, nil, err
}
return refs, &RefService{Protocol: "v1", V1Adv: adv}, nil
case "auto", "v2":
data, err := RequestInfoRefs(ctx, conn, transport.UploadPackServiceName, "version=2")
if err != nil {
return nil, nil, err
}
if caps, err := DecodeV2Capabilities(bytes.NewReader(data)); err == nil {
if !caps.Supports("ls-refs") || !caps.Supports("fetch") {
return nil, nil, fmt.Errorf("source does not advertise required protocol v2 commands")
}
refs, err := listSourceRefsV2(ctx, conn, caps, refPrefixes)
if err != nil {
return nil, nil, err
}
return refs, &RefService{Protocol: "v2", V2Caps: caps}, nil
}
if protocolMode == "v2" {
return nil, nil, fmt.Errorf("source did not negotiate protocol v2")
}
// Fall back to v1
adv, err := decodeV1AdvRefs(data)
if err != nil {
return nil, nil, err
}
refs, err := AdvRefsToSlice(adv)
if err != nil {
return nil, nil, err
}
return refs, &RefService{Protocol: "v1", V1Adv: adv}, nil
default:
return nil, nil, fmt.Errorf("unsupported protocol mode %q", protocolMode)
}
}
// AdvertisedRefsV1 fetches and decodes v1 advertised refs for the given service.
func AdvertisedRefsV1(ctx context.Context, conn *Conn, service string) (*packp.AdvRefs, error) {
data, err := RequestInfoRefs(ctx, conn, service, "")
if err != nil {
return nil, err
}
return decodeV1AdvRefs(data)
}
// AdvRefsToSlice converts an AdvRefs to a slice of references.
func AdvRefsToSlice(ar *packp.AdvRefs) ([]*plumbing.Reference, error) {
refs, err := ar.AllReferences()
if err != nil {
return nil, err
}
iter, err := refs.IterReferences()
if err != nil {
return nil, err
}
defer iter.Close()
var out []*plumbing.Reference
err = iter.ForEach(func(ref *plumbing.Reference) error {
out = append(out, ref)
return nil
})
return out, err
}
// AdvRefsCaps returns the sorted capability list from an AdvRefs.
func AdvRefsCaps(adv *packp.AdvRefs) []string {
if adv == nil || adv.Capabilities == nil {
return nil
}
all := adv.Capabilities.All()
items := make([]string, 0, len(all))
for _, cap := range all {
values := adv.Capabilities.Get(cap)
if len(values) == 0 {
items = append(items, string(cap))
continue
}
for _, value := range values {
items = append(items, string(cap)+"="+value)
}
}
return items
}
func listSourceRefsV1(ctx context.Context, conn *Conn) (*packp.AdvRefs, []*plumbing.Reference, error) {
adv, err := AdvertisedRefsV1(ctx, conn, transport.UploadPackServiceName)
if err != nil {
return nil, nil, err
}
refs, err := AdvRefsToSlice(adv)
if err != nil {
return nil, nil, err
}
return adv, refs, nil
}
func listSourceRefsV2(ctx context.Context, conn *Conn, caps *V2Capabilities, prefixes []string) ([]*plumbing.Reference, error) {
args := []string{"peel"}
for _, prefix := range prefixes {
args = append(args, "ref-prefix "+prefix)
}
body, err := EncodeCommand("ls-refs", caps.RequestCapabilities(), args)
if err != nil {
return nil, err
}
data, err := PostRPC(ctx, conn, transport.UploadPackServiceName, body, true, "upload-pack ls-refs")
if err != nil {
return nil, err
}
return decodeV2LSRefs(bytes.NewReader(data))
}
func decodeV2LSRefs(r *bytes.Reader) ([]*plumbing.Reference, error) {
reader := NewPacketReader(r)
var refs []*plumbing.Reference
for {
kind, payload, err := reader.ReadPacket()
if err != nil {
return nil, err
}
if kind == PacketFlush {
return refs, nil
}
if kind != PacketData {
return nil, fmt.Errorf("unexpected packet type %v in ls-refs response", kind)
}
fields := strings.Fields(strings.TrimSpace(string(payload)))
if len(fields) < 2 {
return nil, fmt.Errorf("malformed ls-refs response line %q", payload)
}
hash := plumbing.NewHash(fields[0])
name := plumbing.ReferenceName(fields[1])
refs = append(refs, plumbing.NewHashReference(name, hash))
}
}
func decodeV1AdvRefs(data []byte) (*packp.AdvRefs, error) {
ar := packp.NewAdvRefs()
if err := ar.Decode(bytes.NewReader(data)); err != nil {
if err == packp.ErrEmptyAdvRefs {
return nil, transport.ErrEmptyRemoteRepository
}
return nil, err
}
return ar, nil
}
// RefHashMap converts a reference slice to a map of name→hash.
func RefHashMap(refs []*plumbing.Reference) map[plumbing.ReferenceName]plumbing.Hash {
out := make(map[plumbing.ReferenceName]plumbing.Hash, len(refs))
for _, ref := range refs {
if ref.Type() == plumbing.HashReference {
out[ref.Name()] = ref.Hash()
}
}
return out
}
Ainternal/gitproto/refs.go+188
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package gitproto
import (
"context"
"testing"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/protocol/packp"
"github.com/go-git/go-git/v5/plumbing/protocol/packp/capability"
)
func TestRefHashMap(t *testing.T) {
hashA := plumbing.NewHash("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
hashB := plumbing.NewHash("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb")
refs := []*plumbing.Reference{
plumbing.NewHashReference("refs/heads/main", hashA),
plumbing.NewHashReference("refs/heads/dev", hashB),
plumbing.NewSymbolicReference("HEAD", "refs/heads/main"), // symbolic, should be skipped
}
m := RefHashMap(refs)
if len(m) != 2 {
t.Fatalf("expected 2 entries, got %d", len(m))
}
if got := m["refs/heads/main"]; got != hashA {
t.Errorf("refs/heads/main = %s, want %s", got, hashA)
}
if got := m["refs/heads/dev"]; got != hashB {
t.Errorf("refs/heads/dev = %s, want %s", got, hashB)
}
// Empty input.
m = RefHashMap(nil)
if len(m) != 0 {
t.Errorf("RefHashMap(nil) returned %d entries, want 0", len(m))
}
}
func TestAdvRefsCaps(t *testing.T) {
// nil AdvRefs should return nil.
if got := AdvRefsCaps(nil); got != nil {
t.Errorf("AdvRefsCaps(nil) = %v, want nil", got)
}
// AdvRefs with nil Capabilities should return nil.
adv := &packp.AdvRefs{}
adv.Capabilities = nil
if got := AdvRefsCaps(adv); got != nil {
t.Errorf("AdvRefsCaps(nil caps) = %v, want nil", got)
}
// AdvRefs with populated capabilities.
adv = packp.NewAdvRefs()
_ = adv.Capabilities.Set(capability.OFSDelta)
_ = adv.Capabilities.Add(capability.Agent, "git/test-agent")
_ = adv.Capabilities.Set(capability.NoProgress)
items := AdvRefsCaps(adv)
if len(items) == 0 {
t.Fatal("expected non-empty capability list")
}
// Verify that known capabilities appear in the output.
found := make(map[string]bool)
for _, item := range items {
found[item] = true
}
if !found["ofs-delta"] {
t.Error("expected ofs-delta in capability list")
}
if !found["agent=git/test-agent"] {
t.Errorf("expected agent=git/test-agent in capability list, got items: %v", items)
}
if !found["no-progress"] {
t.Error("expected no-progress in capability list")
}
}
func TestAdvRefsToSlice(t *testing.T) {
adv := packp.NewAdvRefs()
hashA := plumbing.NewHash("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
hashB := plumbing.NewHash("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb")
adv.References = map[string]plumbing.Hash{
"refs/heads/main": hashA,
"refs/heads/dev": hashB,
}
refs, err := AdvRefsToSlice(adv)
if err != nil {
t.Fatalf("AdvRefsToSlice: %v", err)
}
if len(refs) != 2 {
t.Fatalf("expected 2 refs, got %d", len(refs))
}
found := make(map[plumbing.ReferenceName]plumbing.Hash)
for _, ref := range refs {
found[ref.Name()] = ref.Hash()
}
if found["refs/heads/main"] != hashA {
t.Errorf("refs/heads/main = %s, want %s", found["refs/heads/main"], hashA)
}
if found["refs/heads/dev"] != hashB {
t.Errorf("refs/heads/dev = %s, want %s", found["refs/heads/dev"], hashB)
}
}
func TestDecodeV1AdvRefs(t *testing.T) {
// Empty data should return ErrEmptyRemoteRepository.
_, err := decodeV1AdvRefs(nil)
if err == nil {
t.Fatal("expected error for nil data, got nil")
}
// Empty bytes should also error.
_, err = decodeV1AdvRefs([]byte{})
if err == nil {
t.Fatal("expected error for empty data, got nil")
}
}
func TestListSourceRefsUnsupportedProtocol(t *testing.T) {
_, _, err := ListSourceRefs(context.Background(), nil, "v99", nil)
if err == nil {
t.Fatal("expected error for unsupported protocol mode")
}
}
Ainternal/gitproto/refs_test.go+130
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package gitproto
import (
"bytes"
"context"
"crypto/tls"
"fmt"
"io"
"net/http"
"github.com/go-git/go-git/v5/plumbing/protocol/packp/capability"
"github.com/go-git/go-git/v5/plumbing/transport"
transporthttp "github.com/go-git/go-git/v5/plumbing/transport/http"
)
// StatsPhaseHeader is the HTTP header used to annotate requests with the
// current git-sync stats phase for round-trip tracking.
const StatsPhaseHeader = "X-Git-Sync-Stats-Phase"
// Conn represents a connection to a remote Git HTTP endpoint.
type Conn struct {
Label string
Endpoint *transport.Endpoint
Transport transport.Transport
HTTP *http.Client
Auth transport.AuthMethod
}
// NewConn creates a new connection to the given endpoint.
func NewConn(ep *transport.Endpoint, label string, auth transport.AuthMethod, rt http.RoundTripper) *Conn {
httpClient := &http.Client{Transport: rt}
return &Conn{
Label: label,
Endpoint: ep,
Transport: transporthttp.NewClient(httpClient),
HTTP: httpClient,
Auth: auth,
}
}
// NewHTTPTransport creates an http.Transport with optional TLS skip.
func NewHTTPTransport(skipTLS bool) http.RoundTripper {
if !skipTLS {
return http.DefaultTransport
}
if cloned, ok := http.DefaultTransport.(*http.Transport); ok {
tc := cloned.Clone()
if tc.TLSClientConfig == nil {
tc.TLSClientConfig = &tls.Config{MinVersion: tls.VersionTLS12}
}
tc.TLSClientConfig.InsecureSkipVerify = true
return tc
}
return http.DefaultTransport
}
// RequestInfoRefs fetches /info/refs for the given service.
func RequestInfoRefs(ctx context.Context, conn *Conn, service, gitProtocol string) ([]byte, error) {
url := fmt.Sprintf("%s/info/refs?service=%s", conn.Endpoint.String(), service)
req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
if err != nil {
return nil, err
}
req.Header.Set("Accept", "*/*")
req.Header.Set("User-Agent", capability.DefaultAgent())
req.Header.Set(StatsPhaseHeader, service+" info-refs")
if gitProtocol != "" {
req.Header.Set("Git-Protocol", gitProtocol)
}
ApplyAuth(req, conn.Auth)
res, err := conn.HTTP.Do(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
if err := transporthttp.NewErr(res); err != nil {
return nil, err
}
// Bound the read to prevent unbounded memory allocation (issue #9).
const maxInfoRefsSize = 64 * 1024 * 1024 // 64 MiB
lr := io.LimitReader(res.Body, maxInfoRefsSize+1)
data, err := io.ReadAll(lr)
if err != nil {
return nil, err
}
if int64(len(data)) > maxInfoRefsSize {
return nil, fmt.Errorf("info/refs response exceeds %d byte limit", maxInfoRefsSize)
}
return data, nil
}
// PostRPC sends a buffered POST to the given service and returns the full response body.
// Responses are bounded to prevent unbounded memory allocation (issue #9).
func PostRPC(ctx context.Context, conn *Conn, service string, body []byte, v2 bool, phase string) ([]byte, error) {
reader, err := PostRPCStream(ctx, conn, service, body, v2, phase)
if err != nil {
return nil, err
}
defer reader.Close()
const maxRPCResponse = 128 * 1024 * 1024 // 128 MiB
lr := io.LimitReader(reader, maxRPCResponse+1)
data, err := io.ReadAll(lr)
if err != nil {
return nil, err
}
if int64(len(data)) > maxRPCResponse {
return nil, fmt.Errorf("RPC response for %s exceeds %d byte limit", service, maxRPCResponse)
}
return data, nil
}
// PostRPCStream sends a POST to the given service and returns the response body
// as a streaming reader. Caller must close the returned ReadCloser.
func PostRPCStream(ctx context.Context, conn *Conn, service string, body []byte, v2 bool, phase string) (io.ReadCloser, error) {
url := fmt.Sprintf("%s/%s", conn.Endpoint.String(), service)
req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body))
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", fmt.Sprintf("application/x-%s-request", service))
req.Header.Set("Accept", fmt.Sprintf("application/x-%s-result", service))
req.Header.Set("User-Agent", capability.DefaultAgent())
req.Header.Set(StatsPhaseHeader, phase)
if v2 {
req.Header.Set("Git-Protocol", "version=2")
}
ApplyAuth(req, conn.Auth)
res, err := conn.HTTP.Do(req)
if err != nil {
return nil, err
}
if err := transporthttp.NewErr(res); err != nil {
_ = res.Body.Close()
return nil, err
}
return res.Body, nil
}
// ApplyAuth applies the given auth method to an HTTP request.
func ApplyAuth(req *http.Request, auth transport.AuthMethod) {
switch a := auth.(type) {
case *transporthttp.BasicAuth:
a.SetAuth(req)
case *transporthttp.TokenAuth:
a.SetAuth(req)
}
}
Ainternal/gitproto/smarthttp.go+149
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package gitproto
import (
"net/http"
"testing"
"github.com/go-git/go-git/v5/plumbing/transport"
transporthttp "github.com/go-git/go-git/v5/plumbing/transport/http"
)
func TestNewConn(t *testing.T) {
ep, err := transport.NewEndpoint("https://github.com/user/repo.git")
if err != nil {
t.Fatalf("parse endpoint: %v", err)
}
auth := &transporthttp.BasicAuth{Username: "user", Password: "pass"}
conn := NewConn(ep, "test-label", auth, http.DefaultTransport)
if conn.Label != "test-label" {
t.Errorf("Label = %q, want %q", conn.Label, "test-label")
}
if conn.Endpoint != ep {
t.Error("Endpoint mismatch")
}
if conn.Auth != auth {
t.Error("Auth mismatch")
}
if conn.HTTP == nil {
t.Error("HTTP client should not be nil")
}
if conn.Transport == nil {
t.Error("Transport should not be nil")
}
}
func TestNewHTTPTransport(t *testing.T) {
// Without TLS skip should return default transport.
rt := NewHTTPTransport(false)
if rt != http.DefaultTransport {
t.Error("expected http.DefaultTransport when skipTLS is false")
}
// With TLS skip should return a transport with InsecureSkipVerify.
rt = NewHTTPTransport(true)
if rt == http.DefaultTransport {
t.Error("expected a different transport when skipTLS is true")
}
// Verify the returned transport is an *http.Transport with skip verify.
if ht, ok := rt.(*http.Transport); ok {
if ht.TLSClientConfig == nil || !ht.TLSClientConfig.InsecureSkipVerify {
t.Error("expected InsecureSkipVerify = true")
}
}
}
func TestApplyAuth(t *testing.T) {
// BasicAuth
req, _ := http.NewRequest("GET", "https://example.com", nil)
auth := &transporthttp.BasicAuth{Username: "user", Password: "pass"}
ApplyAuth(req, auth)
user, pass, ok := req.BasicAuth()
if !ok || user != "user" || pass != "pass" {
t.Errorf("BasicAuth not applied: ok=%v user=%q pass=%q", ok, user, pass)
}
// TokenAuth
req, _ = http.NewRequest("GET", "https://example.com", nil)
tokenAuth := &transporthttp.TokenAuth{Token: "my-token"}
ApplyAuth(req, tokenAuth)
got := req.Header.Get("Authorization")
if got == "" {
t.Error("TokenAuth not applied: Authorization header is empty")
}
// nil auth should not panic.
req, _ = http.NewRequest("GET", "https://example.com", nil)
ApplyAuth(req, nil)
}
Ainternal/gitproto/smarthttp_test.go+78
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package planner
import (
"fmt"
"testing"
git "github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/storage/memory"
)
func BenchmarkBuildDesiredRefs(b *testing.B) {
sourceRefs := make(map[plumbing.ReferenceName]plumbing.Hash, 100)
for i := 0; i < 100; i++ {
name := plumbing.NewBranchReferenceName(fmt.Sprintf("branch-%03d", i))
sourceRefs[name] = plumbing.NewHash(fmt.Sprintf("%040x", i+1))
}
cfg := PlanConfig{}
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _, err := BuildDesiredRefs(sourceRefs, cfg)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkBuildPlans(b *testing.B) {
repo, err := git.Init(memory.NewStorage(), nil)
if err != nil {
b.Fatalf("init repo: %v", err)
}
// Build a two-commit chain so we can test fast-forward detection.
root := seedCommit(b, repo, nil)
tip := seedCommit(b, repo, []plumbing.Hash{root})
desired := make(map[plumbing.ReferenceName]DesiredRef, 100)
targetRefs := make(map[plumbing.ReferenceName]plumbing.Hash, 100)
managed := make(map[plumbing.ReferenceName]ManagedTarget, 100)
for i := 0; i < 100; i++ {
ref := plumbing.NewBranchReferenceName(fmt.Sprintf("branch-%03d", i))
short := ref.Short()
switch {
case i < 50:
// skip: source == target
desired[ref] = DesiredRef{
Kind: RefKindBranch, Label: short,
SourceRef: ref, TargetRef: ref,
SourceHash: root,
}
targetRefs[ref] = root
case i < 75:
// create: exists in desired, absent from target
desired[ref] = DesiredRef{
Kind: RefKindBranch, Label: short,
SourceRef: ref, TargetRef: ref,
SourceHash: tip,
}
// no targetRefs entry -> ActionCreate
default:
// update (fast-forward): target at root, source at tip
desired[ref] = DesiredRef{
Kind: RefKindBranch, Label: short,
SourceRef: ref, TargetRef: ref,
SourceHash: tip,
}
targetRefs[ref] = root
}
managed[ref] = ManagedTarget{Kind: RefKindBranch, Label: short}
}
cfg := PlanConfig{}
b.ResetTimer()
for i := 0; i < b.N; i++ {
// Copy managed map each iteration because BuildPlans can mutate it
// when Prune is set (not the case here, but copy for safety).
mgdCopy := make(map[plumbing.ReferenceName]ManagedTarget, len(managed))
for k, v := range managed {
mgdCopy[k] = v
}
_, err := BuildPlans(repo.Storer, desired, targetRefs, mgdCopy, cfg)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkSampledCheckpointCandidates(b *testing.B) {
// Simulate a chain of 10000 commits; prevSpan of 500.
lo := 100
hi := 9999
prevSpan := 500
b.ResetTimer()
for i := 0; i < b.N; i++ {
candidates := SampledCheckpointCandidates(lo, hi, prevSpan)
if len(candidates) == 0 {
b.Fatal("expected candidates")
}
}
}
func BenchmarkReachesCommit(b *testing.B) {
repo, err := git.Init(memory.NewStorage(), nil)
if err != nil {
b.Fatalf("init repo: %v", err)
}
// Build a 100-commit linear chain.
hashes := make([]plumbing.Hash, 100)
hashes[0] = seedCommit(b, repo, nil)
for i := 1; i < 100; i++ {
hashes[i] = seedCommit(b, repo, []plumbing.Hash{hashes[i-1]})
}
tip := hashes[99]
root := hashes[0]
b.ResetTimer()
for i := 0; i < b.N; i++ {
ok, err := ReachesCommit(repo.Storer, tip, root)
if err != nil {
b.Fatal(err)
}
if !ok {
b.Fatal("expected tip to reach root")
}
}
}
// seedCommit is defined in planner_test.go with a testing.TB parameter,
// so it is usable from both tests and benchmarks.
Ainternal/planner/benchmark_test.go+137
package planner
import ( "fmt" "sort"
"github.com/go-git/go-git/v5/plumbing" "github.com/go-git/go-git/v5/plumbing/object" "github.com/go-git/go-git/v5/plumbing/storer" )
// BootstrapBatch holds the checkpoint plan for a single branch during batched bootstrap. type BootstrapBatch struct { Plan BranchPlan TempRef plumbing.ReferenceName ResumeHash plumbing.Hash Checkpoints []plumbing.Hash }
// FirstParentChain walks the first-parent chain from tip back to root, // returning the chain in root-to-tip order. func FirstParentChain(store storer.EncodedObjectStorer, tip plumbing.Hash) ([]plumbing.Hash, error) { commit, err := object.GetCommit(store, tip) if err != nil { return nil, err } chain := make([]plumbing.Hash, 0, 128) for { chain = append(chain, commit.Hash) if len(commit.ParentHashes) == 0 { break } commit, err = object.GetCommit(store, commit.ParentHashes[0]) if err != nil { return nil, err } } // Reverse in-place to get root-to-tip order. for i, j := 0, len(chain)-1; i < j; i, j = i+1, j-1 { chain[i], chain[j] = chain[j], chain[i] } return chain, nil }
// SampledCheckpointCandidates generates a set of candidate indices to probe, // sorted from largest (preferred) to smallest. func SampledCheckpointCandidates(lo, hi int, prevSpan int) []int { if lo > hi { return nil } set := map[int]struct{}{} add := func(idx int) { if idx < lo { idx = lo } if idx > hi { idx = hi } set[idx] = struct{}{} }
projected := hi if prevSpan > 0 { projected = lo + prevSpan - 1 } add(projected)
const sampleCount = 4 current := projected for i := 0; i < sampleCount-1; i++ { if current <= lo { add(lo) continue } distance := current - lo current = lo + distance/2 add(current) } add(lo)
candidates := make([]int, 0, len(set)) for idx := range set { candidates = append(candidates, idx) } sort.Sort(sort.Reverse(sort.IntSlice(candidates))) return candidates }
// SampledCheckpointUnderLimit finds the largest checkpoint index that fits within // the batch limit, using a sampling strategy to reduce probes (issue #14). func SampledCheckpointUnderLimit( chain []plumbing.Hash, prevIdx int, prevSpan int, probe func(idx int) (tooLarge bool, err error), ) (int, error) { lo := prevIdx + 1 hi := len(chain) - 1 if lo > hi { return -1, nil }
samples := SampledCheckpointCandidates(lo, hi, prevSpan) best := -1 for _, idx := range samples { tooLarge, err := probe(idx) if err != nil { return -1, err } if tooLarge { continue } best = idx break } if best != -1 { return best, nil }
if prevSpan > 1 { shrunk := prevSpan / 2 if shrunk < 1 { shrunk = 1 } idx := lo + shrunk - 1 if idx > hi { idx = hi } if idx >= lo { tooLarge, err := probe(idx) if err != nil { return -1, err } if !tooLarge { return idx, nil } } }
tooLarge, err := probe(lo) if err != nil { return -1, err } if tooLarge { return -1, nil } return lo, nil }
// BootstrapResumeIndex finds the starting index in a checkpoint list given a resume hash. func BootstrapResumeIndex(checkpoints []plumbing.Hash, resumeHash plumbing.Hash) (int, error) { if resumeHash.IsZero() { return 0, nil } for idx, checkpoint := range checkpoints { if checkpoint == resumeHash { return idx + 1, nil } } return 0, fmt.Errorf("temp ref hash %s does not match any planned checkpoint", resumeHash) }
Ainternal/planner/checkpoint.go+161
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package planner
import ( "fmt" "strings"
"github.com/go-git/go-git/v5/plumbing" )
// NormalizeMapping validates and normalizes a single ref mapping. // It rejects branch-to-tag and tag-to-branch cross-kind mappings (issue #3). func NormalizeMapping(m RefMapping) (plumbing.ReferenceName, plumbing.ReferenceName, RefKind, error) { src := strings.TrimSpace(m.Source) dst := strings.TrimSpace(m.Target) if src == "" || dst == "" { return "", "", "", fmt.Errorf("invalid mapping %q:%q: source and target must be non-empty", m.Source, m.Target) }
srcFQ := strings.HasPrefix(src, "refs/") dstFQ := strings.HasPrefix(dst, "refs/")
// Both fully qualified if srcFQ && dstFQ { sourceRef := plumbing.ReferenceName(src) targetRef := plumbing.ReferenceName(dst) srcKind := RefKindFromName(sourceRef) dstKind := RefKindFromName(targetRef) if srcKind == "" { return "", "", "", fmt.Errorf("unsupported source ref kind: %s", src) } if dstKind == "" { return "", "", "", fmt.Errorf("unsupported target ref kind: %s", dst) } if srcKind != dstKind { return "", "", "", fmt.Errorf("cross-kind mapping not allowed: %s (%s) -> %s (%s)", src, srcKind, dst, dstKind) } return sourceRef, targetRef, dstKind, nil }
// Both short names -> branch mapping if !srcFQ && !dstFQ { return plumbing.NewBranchReferenceName(src), plumbing.NewBranchReferenceName(dst), RefKindBranch, nil }
// Mixed: one FQ and one short -> reject as ambiguous (issue #3) return "", "", "", fmt.Errorf("ambiguous mapping: cannot mix fully-qualified and short ref names: %q -> %q", src, dst) }
// ValidateMappings normalizes all mappings and checks for duplicate targets (issue #2). // Validation happens before any network activity. func ValidateMappings(mappings []RefMapping) ([]NormalizedMapping, error) { if len(mappings) == 0 { return nil, nil }
normalized := make([]NormalizedMapping, 0, len(mappings)) targetSeen := make(map[plumbing.ReferenceName]string, len(mappings))
for _, m := range mappings { srcRef, dstRef, kind, err := NormalizeMapping(m) if err != nil { return nil, err }
// Check for duplicate target refs (issue #2) if prev, exists := targetSeen[dstRef]; exists { return nil, fmt.Errorf("duplicate target ref %s: mapped from both %q and %q", dstRef, prev, m.Source) } targetSeen[dstRef] = m.Source
normalized = append(normalized, NormalizedMapping{ SourceRef: srcRef, TargetRef: dstRef, Kind: kind, }) } return normalized, nil }
// NormalizedMapping is a validated and normalized ref mapping. type NormalizedMapping struct { SourceRef plumbing.ReferenceName TargetRef plumbing.ReferenceName Kind RefKind }
Ainternal/planner/mapping.go+85
package planner
import (
"errors"
"fmt"
"sort"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/object"
"github.com/go-git/go-git/v5/plumbing/storer"
)
// PlanConfig holds configuration for plan generation.
type PlanConfig struct {
Branches []string
Mappings []RefMapping
IncludeTags bool
Force bool
Prune bool
}
// BuildDesiredRefs constructs the set of desired refs and managed targets from
// source refs and user configuration. All mapping validation happens here,
// before any network activity (issue #2, #3).
func BuildDesiredRefs(
sourceRefs map[plumbing.ReferenceName]plumbing.Hash,
cfg PlanConfig,
) (map[plumbing.ReferenceName]DesiredRef, map[plumbing.ReferenceName]ManagedTarget, error) {
desired := make(map[plumbing.ReferenceName]DesiredRef)
managed := make(map[plumbing.ReferenceName]ManagedTarget)
addManaged := func(sourceRef, targetRef plumbing.ReferenceName, kind RefKind, hash plumbing.Hash) error {
if hash.IsZero() {
return fmt.Errorf("source ref %s not found", sourceRef)
}
// Reject duplicate target refs from different sources (issue #2, #3).
if existing, ok := desired[targetRef]; ok && existing.SourceRef != sourceRef {
return fmt.Errorf("duplicate target ref %s: mapped from both %s and %s", targetRef, existing.SourceRef, sourceRef)
}
short := targetRef.Short()
desired[targetRef] = DesiredRef{
Kind: kind,
Label: short,
SourceRef: sourceRef,
TargetRef: targetRef,
SourceHash: hash,
}
managed[targetRef] = ManagedTarget{Kind: kind, Label: short}
return nil
}
if len(cfg.Mappings) > 0 {
// Validate all mappings up front (issue #2, #3)
normalized, err := ValidateMappings(cfg.Mappings)
if err != nil {
return nil, nil, err
}
for _, nm := range normalized {
if err := addManaged(nm.SourceRef, nm.TargetRef, nm.Kind, sourceRefs[nm.SourceRef]); err != nil {
return nil, nil, err
}
}
} else {
branches := BranchMapFromRefHashMap(sourceRefs)
selected := SelectBranches(branches, cfg.Branches)
for branch, hash := range selected {
refName := plumbing.NewBranchReferenceName(branch)
if err := addManaged(refName, refName, RefKindBranch, hash); err != nil {
return nil, nil, err
}
}
}
if cfg.IncludeTags {
for refName, hash := range sourceRefs {
if !refName.IsTag() {
continue
}
if err := addManaged(refName, refName, RefKindTag, hash); err != nil {
return nil, nil, err
}
}
}
return desired, managed, nil
}
// BuildPlans generates the action plans for each managed ref.
func BuildPlans(
store storer.EncodedObjectStorer,
desired map[plumbing.ReferenceName]DesiredRef,
targetRefs map[plumbing.ReferenceName]plumbing.Hash,
managed map[plumbing.ReferenceName]ManagedTarget,
cfg PlanConfig,
) ([]BranchPlan, error) {
if cfg.Prune {
for targetRef := range targetRefs {
if _, ok := managed[targetRef]; ok {
continue
}
switch {
case targetRef.IsTag() && cfg.IncludeTags:
managed[targetRef] = ManagedTarget{Kind: RefKindTag, Label: targetRef.Short()}
case targetRef.IsBranch() && len(cfg.Mappings) == 0 && len(cfg.Branches) == 0:
managed[targetRef] = ManagedTarget{Kind: RefKindBranch, Label: targetRef.Short()}
}
}
}
targetNames := make([]plumbing.ReferenceName, 0, len(managed))
for name := range managed {
targetNames = append(targetNames, name)
}
sort.Slice(targetNames, func(i, j int) bool { return targetNames[i] < targetNames[j] })
plans := make([]BranchPlan, 0, len(targetNames))
for _, targetRef := range targetNames {
info := managed[targetRef]
want, existsInDesired := desired[targetRef]
targetHash, existsOnTarget := targetRefs[targetRef]
if !existsInDesired {
if cfg.Prune && existsOnTarget {
plans = append(plans, BranchPlan{
Branch: info.Label,
TargetRef: targetRef,
TargetHash: targetHash,
Kind: info.Kind,
Action: ActionDelete,
Reason: fmt.Sprintf("%s -> <deleted>", ShortHash(targetHash)),
})
}
continue
}
if !existsOnTarget {
plans = append(plans, BranchPlan{
Branch: want.Label,
SourceRef: want.SourceRef,
TargetRef: want.TargetRef,
SourceHash: want.SourceHash,
Kind: want.Kind,
Action: ActionCreate,
Reason: fmt.Sprintf("%s -> <new>", ShortHash(want.SourceHash)),
})
continue
}
plan, err := PlanRef(store, want, targetHash, cfg.Force)
if err != nil {
return nil, err
}
plans = append(plans, plan)
}
sort.Slice(plans, func(i, j int) bool {
return plans[i].TargetRef.String() < plans[j].TargetRef.String()
})
return plans, nil
}
// BuildBootstrapPlans creates plans for an empty-target bootstrap.
func BuildBootstrapPlans(
desired map[plumbing.ReferenceName]DesiredRef,
targetRefs map[plumbing.ReferenceName]plumbing.Hash,
) ([]BranchPlan, error) {
targetNames := make([]plumbing.ReferenceName, 0, len(desired))
for _, want := range desired {
targetNames = append(targetNames, want.TargetRef)
}
sort.Slice(targetNames, func(i, j int) bool { return targetNames[i] < targetNames[j] })
plans := make([]BranchPlan, 0, len(targetNames))
for _, targetRef := range targetNames {
targetHash := targetRefs[targetRef]
if !targetHash.IsZero() {
return nil, fmt.Errorf("target ref %s already exists; use sync for non-bootstrap runs", targetRef)
}
want := desired[targetRef]
plans = append(plans, BranchPlan{
Branch: want.Label,
SourceRef: want.SourceRef,
TargetRef: want.TargetRef,
SourceHash: want.SourceHash,
TargetHash: plumbing.ZeroHash,
Kind: want.Kind,
Action: ActionCreate,
Reason: fmt.Sprintf("create %s at %s", want.TargetRef, ShortHash(want.SourceHash)),
})
}
return plans, nil
}
// PlanRef determines the action for a single ref that exists on both source and target.
func PlanRef(store storer.EncodedObjectStorer, want DesiredRef, targetHash plumbing.Hash, force bool) (BranchPlan, error) {
plan := BranchPlan{
Branch: want.Label,
SourceRef: want.SourceRef,
TargetRef: want.TargetRef,
SourceHash: want.SourceHash,
TargetHash: targetHash,
Kind: want.Kind,
}
if want.SourceHash == targetHash {
plan.Action = ActionSkip
plan.Reason = fmt.Sprintf("%s already current", ShortHash(want.SourceHash))
return plan, nil
}
if want.Kind == RefKindTag {
if force {
plan.Action = ActionUpdate
plan.Reason = fmt.Sprintf("%s -> %s (force tag update)", ShortHash(targetHash), ShortHash(want.SourceHash))
return plan, nil
}
plan.Action = ActionBlock
plan.Reason = fmt.Sprintf("%s differs from %s; use --force to retarget tag", ShortHash(targetHash), ShortHash(want.SourceHash))
return plan, nil
}
isFF, err := ReachesCommit(store, want.SourceHash, targetHash)
if err != nil {
if errors.Is(err, ErrAncestryDepthExceeded) {
// Can't prove fast-forward within depth limit — block with explanation.
plan.Action = ActionBlock
plan.Reason = fmt.Sprintf("ancestry check for %s exceeded depth limit; use --force if this is a valid fast-forward", want.TargetRef)
return plan, nil
}
return plan, fmt.Errorf("check fast-forward for %s: %w", want.TargetRef, err)
}
if isFF {
plan.Action = ActionUpdate
plan.Reason = fmt.Sprintf("%s -> %s", ShortHash(targetHash), ShortHash(want.SourceHash))
return plan, nil
}
if force {
plan.Action = ActionUpdate
plan.Reason = fmt.Sprintf("%s -> %s (force)", ShortHash(targetHash), ShortHash(want.SourceHash))
return plan, nil
}
plan.Action = ActionBlock
plan.Reason = fmt.Sprintf("%s is not an ancestor of %s", ShortHash(targetHash), ShortHash(want.SourceHash))
return plan, nil
}
// MaxAncestryDepth is the maximum number of commits to visit during a
// fast-forward ancestry check. This prevents full graph walks on very
// large histories (issue #16). Set high enough to avoid false negatives
// on real repos — even the Linux kernel has ~1.3M commits.
const MaxAncestryDepth = 2_000_000
// ErrAncestryDepthExceeded is returned when ReachesCommit exceeds MaxAncestryDepth.
var ErrAncestryDepthExceeded = errors.New("ancestry check exceeded depth limit")
// ReachesCommit checks whether the commit at startHash has targetHash as an
// ancestor, bounded to MaxAncestryDepth commits to prevent degenerate walks.
func ReachesCommit(store storer.EncodedObjectStorer, startHash, targetHash plumbing.Hash) (bool, error) {
if startHash == targetHash {
return true, nil
}
start, err := object.GetCommit(store, startHash)
if err != nil {
return false, fmt.Errorf("load source commit %s: %w", startHash, err)
}
seen := map[plumbing.Hash]struct{}{}
stack := []*object.Commit{start}
for len(stack) > 0 {
if len(seen) >= MaxAncestryDepth {
return false, ErrAncestryDepthExceeded
}
current := stack[len(stack)-1]
stack = stack[:len(stack)-1]
if _, ok := seen[current.Hash]; ok {
continue
}
seen[current.Hash] = struct{}{}
for _, parentHash := range current.ParentHashes {
if parentHash == targetHash {
return true, nil
}
if _, ok := seen[parentHash]; ok {
continue
}
parent, err := object.GetCommit(store, parentHash)
if err != nil {
if errors.Is(err, plumbing.ErrObjectNotFound) {
continue
}
return false, err
}
stack = append(stack, parent)
}
}
return false, nil
}
// ObjectsToPush computes the set of objects that need to be sent to the target.
func ObjectsToPush(store storer.EncodedObjectStorer, wants []plumbing.Hash, targetRefs map[plumbing.ReferenceName]plumbing.Hash) ([]plumbing.Hash, error) {
haveSet := make(map[plumbing.Hash]struct{})
for _, h := range targetRefs {
if !h.IsZero() {
haveSet[h] = struct{}{}
}
}
filteredWants := make([]plumbing.Hash, 0, len(wants))
for _, h := range wants {
if _, ok := haveSet[h]; !ok {
filteredWants = append(filteredWants, h)
}
}
if len(filteredWants) == 0 {
return nil, nil
}
seen := make(map[plumbing.Hash]bool, len(filteredWants)*4)
objects := make([]plumbing.Hash, 0, len(filteredWants)*16)
for _, h := range filteredWants {
if err := collectObjects(store, h, haveSet, seen, &objects); err != nil {
return nil, err
}
}
return objects, nil
}
func collectObjects(
store storer.EncodedObjectStorer,
hash plumbing.Hash,
haves map[plumbing.Hash]struct{},
seen map[plumbing.Hash]bool,
out *[]plumbing.Hash,
) error {
if hash.IsZero() {
return nil
}
if _, ok := haves[hash]; ok {
return nil
}
if seen[hash] {
return nil
}
seen[hash] = true
obj, err := store.EncodedObject(plumbing.AnyObject, hash)
if err != nil {
return fmt.Errorf("load object %s: %w", hash, err)
}
switch obj.Type() {
case plumbing.CommitObject:
commit, err := object.GetCommit(store, hash)
if err != nil {
return fmt.Errorf("load commit %s: %w", hash, err)
}
if err := collectObjects(store, commit.TreeHash, haves, seen, out); err != nil {
return err
}
for _, ph := range commit.ParentHashes {
if err := collectObjects(store, ph, haves, seen, out); err != nil {
return err
}
}
case plumbing.TreeObject:
tree, err := object.GetTree(store, hash)
if err != nil {
return fmt.Errorf("load tree %s: %w", hash, err)
}
for _, entry := range tree.Entries {
if err := collectObjects(store, entry.Hash, haves, seen, out); err != nil {
return err
}
}
case plumbing.TagObject:
tag, err := object.GetTag(store, hash)
if err != nil {
return fmt.Errorf("load tag %s: %w", hash, err)
}
if err := collectObjects(store, tag.Target, haves, seen, out); err != nil {
return err
}
case plumbing.BlobObject:
default:
return fmt.Errorf("unsupported object type %s for %s", obj.Type(), hash)
}
*out = append(*out, hash)
return nil
}
Ainternal/planner/planner.go+395
package planner
import ( "fmt" "slices" "testing" "time"
git "github.com/go-git/go-git/v5" "github.com/go-git/go-git/v5/plumbing" "github.com/go-git/go-git/v5/plumbing/object" "github.com/go-git/go-git/v5/plumbing/protocol/packp" "github.com/go-git/go-git/v5/plumbing/protocol/packp/capability" "github.com/go-git/go-git/v5/storage/memory" )
func TestSelectBranches(t *testing.T) { source := map[string]plumbing.Hash{ "main": plumbing.NewHash("1111111111111111111111111111111111111111"), "dev": plumbing.NewHash("2222222222222222222222222222222222222222"), } got := SelectBranches(source, []string{"dev", "missing"}) if len(got) != 1 || got["dev"] != source["dev"] { t.Fatalf("unexpected branch selection: %#v", got) } }
func TestPlanRefSkip(t *testing.T) { hash := plumbing.NewHash("1111111111111111111111111111111111111111") plan, err := PlanRef(nil, DesiredRef{ Kind: RefKindBranch, Label: "main", SourceRef: plumbing.NewBranchReferenceName("main"), TargetRef: plumbing.NewBranchReferenceName("main"), SourceHash: hash, }, hash, false) if err != nil { t.Fatalf("PlanRef error: %v", err) } if plan.Action != ActionSkip { t.Fatalf("expected skip, got %s", plan.Action) } }
func TestPlanRefFastForwardAndBlock(t *testing.T) { repo, err := git.Init(memory.NewStorage(), nil) if err != nil { t.Fatalf("init repo: %v", err) } root := seedCommit(t, repo, nil) next := seedCommit(t, repo, []plumbing.Hash{root}) side := seedCommit(t, repo, []plumbing.Hash{root})
ffPlan, err := PlanRef(repo.Storer, DesiredRef{ Kind: RefKindBranch, Label: "main", SourceRef: plumbing.NewBranchReferenceName("main"), TargetRef: plumbing.NewBranchReferenceName("main"), SourceHash: next, }, root, false) if err != nil { t.Fatalf("PlanRef fast-forward: %v", err) } if ffPlan.Action != ActionUpdate { t.Fatalf("expected update, got %s", ffPlan.Action) }
blockPlan, err := PlanRef(repo.Storer, DesiredRef{ Kind: RefKindBranch, Label: "main", SourceRef: plumbing.NewBranchReferenceName("main"), TargetRef: plumbing.NewBranchReferenceName("main"), SourceHash: side, }, next, false) if err != nil { t.Fatalf("PlanRef block: %v", err) } if blockPlan.Action != ActionBlock { t.Fatalf("expected block, got %s", blockPlan.Action) } }
func TestValidateMappingsRejectsDuplicateTargets(t *testing.T) { _, err := ValidateMappings([]RefMapping{ {Source: "main", Target: "stable"}, {Source: "release", Target: "stable"}, }) if err == nil { t.Fatalf("expected error for duplicate target") } }
func TestValidateMappingsRejectsCrossKind(t *testing.T) { _, err := ValidateMappings([]RefMapping{ {Source: "refs/heads/main", Target: "refs/tags/main"}, }) if err == nil { t.Fatalf("expected error for cross-kind mapping") } }
func TestValidateMappingsRejectsMixedQualification(t *testing.T) { _, err := ValidateMappings([]RefMapping{ {Source: "refs/heads/main", Target: "stable"}, }) if err == nil { t.Fatalf("expected error for mixed qualification") } }
func TestSampledCheckpointCandidates(t *testing.T) { candidates := SampledCheckpointCandidates(10, 100, 20) if len(candidates) == 0 { t.Fatalf("expected sampled candidates") } if candidates[0] != 29 { t.Fatalf("expected highest candidate first, got %v", candidates) } if !slices.Contains(candidates, 29) { t.Fatalf("expected projected candidate near previous span, got %v", candidates) } if !slices.Contains(candidates, 10) { t.Fatalf("expected lower bound candidate, got %v", candidates) } }
func TestSampledCheckpointUnderLimit(t *testing.T) { chain := make([]plumbing.Hash, 40) for i := range chain { chain[i] = plumbing.NewHash(fmt.Sprintf("%040x", i+1)) } var probes []int best, err := SampledCheckpointUnderLimit(chain, 4, 8, func(idx int) (bool, error) { probes = append(probes, idx) return idx > 19, nil }) if err != nil { t.Fatalf("SampledCheckpointUnderLimit: %v", err) } if best < 12 || best > 19 { t.Fatalf("expected a reasonable sampled checkpoint, got %d", best) } if len(probes) > 6 { t.Fatalf("expected fixed small probe count, got %d probes: %v", len(probes), probes) } }
func TestBuildDesiredRefsWithMappings(t *testing.T) { hash1 := plumbing.NewHash("1111111111111111111111111111111111111111") hash2 := plumbing.NewHash("2222222222222222222222222222222222222222")
sourceRefs := map[plumbing.ReferenceName]plumbing.Hash{ plumbing.NewBranchReferenceName("main"): hash1, plumbing.NewBranchReferenceName("develop"): hash2, }
tests := []struct { name string mappings []RefMapping wantTargets []plumbing.ReferenceName wantErr bool }{ { name: "simple rename mapping", mappings: []RefMapping{ {Source: "main", Target: "stable"}, }, wantTargets: []plumbing.ReferenceName{ plumbing.NewBranchReferenceName("stable"), }, }, { name: "multiple mappings", mappings: []RefMapping{ {Source: "main", Target: "prod"}, {Source: "develop", Target: "staging"}, }, wantTargets: []plumbing.ReferenceName{ plumbing.NewBranchReferenceName("prod"), plumbing.NewBranchReferenceName("staging"), }, }, { name: "missing source ref errors", mappings: []RefMapping{ {Source: "nonexistent", Target: "target"}, }, wantErr: true, }, { name: "duplicate target errors", mappings: []RefMapping{ {Source: "main", Target: "same"}, {Source: "develop", Target: "same"}, }, wantErr: true, }, }
for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { desired, managed, err := BuildDesiredRefs(sourceRefs, PlanConfig{ Mappings: tt.mappings, }) if tt.wantErr { if err == nil { t.Fatal("expected error, got nil") } return } if err != nil { t.Fatalf("unexpected error: %v", err) } if len(desired) != len(tt.wantTargets) { t.Fatalf("expected %d desired refs, got %d", len(tt.wantTargets), len(desired)) } for _, target := range tt.wantTargets { if _, ok := desired[target]; !ok { t.Errorf("expected target ref %s in desired map", target) } if _, ok := managed[target]; !ok { t.Errorf("expected target ref %s in managed map", target) } } }) } }
func TestBuildDesiredRefsAllBranches(t *testing.T) { hash1 := plumbing.NewHash("1111111111111111111111111111111111111111") hash2 := plumbing.NewHash("2222222222222222222222222222222222222222") tagHash := plumbing.NewHash("3333333333333333333333333333333333333333")
sourceRefs := map[plumbing.ReferenceName]plumbing.Hash{ plumbing.NewBranchReferenceName("main"): hash1, plumbing.NewBranchReferenceName("develop"): hash2, plumbing.NewTagReferenceName("v1.0"): tagHash, }
tests := []struct { name string branches []string includeTags bool wantBranchCount int wantTagCount int }{ { name: "no filter returns all branches", wantBranchCount: 2, wantTagCount: 0, }, { name: "filter to single branch", branches: []string{"main"}, wantBranchCount: 1, wantTagCount: 0, }, { name: "include tags adds tag refs", includeTags: true, wantBranchCount: 2, wantTagCount: 1, }, { name: "branch filter plus tags", branches: []string{"main"}, includeTags: true, wantBranchCount: 1, wantTagCount: 1, }, }
for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { desired, _, err := BuildDesiredRefs(sourceRefs, PlanConfig{ Branches: tt.branches, IncludeTags: tt.includeTags, }) if err != nil { t.Fatalf("unexpected error: %v", err) } branchCount, tagCount := 0, 0 for _, d := range desired { switch d.Kind { case RefKindBranch: branchCount++ case RefKindTag: tagCount++ } } if branchCount != tt.wantBranchCount { t.Errorf("expected %d branches, got %d", tt.wantBranchCount, branchCount) } if tagCount != tt.wantTagCount { t.Errorf("expected %d tags, got %d", tt.wantTagCount, tagCount) } }) } }
func TestBuildPlansDelete(t *testing.T) { hash1 := plumbing.NewHash("1111111111111111111111111111111111111111") hash2 := plumbing.NewHash("2222222222222222222222222222222222222222")
mainRef := plumbing.NewBranchReferenceName("main") oldRef := plumbing.NewBranchReferenceName("old-branch")
desired := map[plumbing.ReferenceName]DesiredRef{ mainRef: { Kind: RefKindBranch, Label: "main", SourceRef: mainRef, TargetRef: mainRef, SourceHash: hash1, }, } managed := map[plumbing.ReferenceName]ManagedTarget{ mainRef: {Kind: RefKindBranch, Label: "main"}, } targetRefs := map[plumbing.ReferenceName]plumbing.Hash{ mainRef: hash1, oldRef: hash2, }
plans, err := BuildPlans(nil, desired, targetRefs, managed, PlanConfig{ Prune: true, }) if err != nil { t.Fatalf("BuildPlans error: %v", err) }
var deletePlan *BranchPlan for i, p := range plans { if p.Action == ActionDelete { deletePlan = &plans[i] break } } if deletePlan == nil { t.Fatal("expected a delete plan for old-branch") } if deletePlan.TargetRef != oldRef { t.Fatalf("expected delete for %s, got %s", oldRef, deletePlan.TargetRef) } if deletePlan.Kind != RefKindBranch { t.Fatalf("expected branch kind, got %s", deletePlan.Kind) } }
func TestBuildPlansTagBlock(t *testing.T) { repo, err := git.Init(memory.NewStorage(), nil) if err != nil { t.Fatalf("init repo: %v", err) } hash1 := seedCommit(t, repo, nil) hash2 := seedCommit(t, repo, nil)
tagRef := plumbing.NewTagReferenceName("v1.0")
desired := map[plumbing.ReferenceName]DesiredRef{ tagRef: { Kind: RefKindTag, Label: "v1.0", SourceRef: tagRef, TargetRef: tagRef, SourceHash: hash2, }, } managed := map[plumbing.ReferenceName]ManagedTarget{ tagRef: {Kind: RefKindTag, Label: "v1.0"}, } targetRefs := map[plumbing.ReferenceName]plumbing.Hash{ tagRef: hash1, }
plans, err := BuildPlans(repo.Storer, desired, targetRefs, managed, PlanConfig{ Force: false, }) if err != nil { t.Fatalf("BuildPlans error: %v", err) } if len(plans) != 1 { t.Fatalf("expected 1 plan, got %d", len(plans)) } if plans[0].Action != ActionBlock { t.Fatalf("expected block action for tag without force, got %s", plans[0].Action) } }
func TestBuildPlansTagForce(t *testing.T) { repo, err := git.Init(memory.NewStorage(), nil) if err != nil { t.Fatalf("init repo: %v", err) } hash1 := seedCommit(t, repo, nil) hash2 := seedCommit(t, repo, nil)
tagRef := plumbing.NewTagReferenceName("v1.0")
plans, err := BuildPlans(repo.Storer, desired, targetRefs, managed, PlanConfig{ Force: true, }) if err != nil { t.Fatalf("BuildPlans error: %v", err) } if len(plans) != 1 { t.Fatalf("expected 1 plan, got %d", len(plans)) } if plans[0].Action != ActionUpdate { t.Fatalf("expected update action for tag with force, got %s", plans[0].Action) } }
func TestBootstrapResumeIndex(t *testing.T) { checkpoints := []plumbing.Hash{ plumbing.NewHash("1111111111111111111111111111111111111111"), plumbing.NewHash("2222222222222222222222222222222222222222"), plumbing.NewHash("3333333333333333333333333333333333333333"), }
tests := []struct { name string resumeHash plumbing.Hash wantIdx int wantErr bool }{ { name: "zero hash starts at beginning", resumeHash: plumbing.ZeroHash, wantIdx: 0, }, { name: "match first checkpoint resumes at index 1", resumeHash: plumbing.NewHash("1111111111111111111111111111111111111111"), wantIdx: 1, }, { name: "match second checkpoint resumes at index 2", resumeHash: plumbing.NewHash("2222222222222222222222222222222222222222"), wantIdx: 2, }, { name: "match last checkpoint resumes past end", resumeHash: plumbing.NewHash("3333333333333333333333333333333333333333"), wantIdx: 3, }, { name: "mismatch hash returns error", resumeHash: plumbing.NewHash("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"), wantErr: true, }, }
for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { idx, err := BootstrapResumeIndex(checkpoints, tt.resumeHash) if tt.wantErr { if err == nil { t.Fatal("expected error, got nil") } return } if err != nil { t.Fatalf("unexpected error: %v", err) } if idx != tt.wantIdx { t.Fatalf("expected resume index %d, got %d", tt.wantIdx, idx) } }) } }
func TestFirstParentChain(t *testing.T) { repo, err := git.Init(memory.NewStorage(), nil) if err != nil { t.Fatalf("init repo: %v", err) }
// Build a linear chain: root -> mid -> tip root := seedCommit(t, repo, nil) mid := seedCommit(t, repo, []plumbing.Hash{root}) tip := seedCommit(t, repo, []plumbing.Hash{mid})
chain, err := FirstParentChain(repo.Storer, tip) if err != nil { t.Fatalf("FirstParentChain error: %v", err) }
if len(chain) != 3 { t.Fatalf("expected chain of length 3, got %d: %v", len(chain), chain) } // Chain should be in root-to-tip order if chain[0] != root { t.Errorf("chain[0] = %s, want root %s", chain[0], root) } if chain[1] != mid { t.Errorf("chain[1] = %s, want mid %s", chain[1], mid) } if chain[2] != tip { t.Errorf("chain[2] = %s, want tip %s", chain[2], tip) } }
func TestValidateMappingsEmpty(t *testing.T) { result, err := ValidateMappings(nil) if err != nil { t.Fatalf("expected nil error for empty mappings, got %v", err) } if result != nil { t.Fatalf("expected nil result for empty mappings, got %v", result) } }
func TestValidateMappingsValidBranch(t *testing.T) { normalized, err := ValidateMappings([]RefMapping{ {Source: "main", Target: "stable"}, }) if err != nil { t.Fatalf("unexpected error: %v", err) } if len(normalized) != 1 { t.Fatalf("expected 1 normalized mapping, got %d", len(normalized)) } nm := normalized[0] if nm.SourceRef != plumbing.NewBranchReferenceName("main") { t.Fatalf("expected source ref refs/heads/main, got %s", nm.SourceRef) } if nm.TargetRef != plumbing.NewBranchReferenceName("stable") { t.Fatalf("expected target ref refs/heads/stable, got %s", nm.TargetRef) } if nm.Kind != RefKindBranch { t.Fatalf("expected kind branch, got %s", nm.Kind) } }
func TestValidateMappingsValidFullRef(t *testing.T) { normalized, err := ValidateMappings([]RefMapping{ {Source: "refs/heads/main", Target: "refs/heads/upstream-main"}, }) if err != nil { t.Fatalf("unexpected error: %v", err) } if len(normalized) != 1 { t.Fatalf("expected 1 normalized mapping, got %d", len(normalized)) } nm := normalized[0] if nm.SourceRef != "refs/heads/main" { t.Fatalf("expected source ref refs/heads/main, got %s", nm.SourceRef) } if nm.TargetRef != "refs/heads/upstream-main" { t.Fatalf("expected target ref refs/heads/upstream-main, got %s", nm.TargetRef) } if nm.Kind != RefKindBranch { t.Fatalf("expected kind branch, got %s", nm.Kind) } }
func TestBuildDesiredRefsEmptySource(t *testing.T) { // Empty source ref map with a branch filter: SelectBranches finds nothing, // so the desired map should be empty without error. desired, _, err := BuildDesiredRefs( map[plumbing.ReferenceName]plumbing.Hash{}, PlanConfig{Branches: []string{"main"}}, ) if err != nil { t.Fatalf("unexpected error: %v", err) } if len(desired) != 0 { t.Fatalf("expected empty desired refs for empty source, got %d", len(desired)) } }
func TestBuildDesiredRefsTagForceRetarget(t *testing.T) { // A tag that exists on both source and target with different hashes. // With force=true, PlanRef should give ActionUpdate. repo, err := git.Init(memory.NewStorage(), nil) if err != nil { t.Fatalf("init repo: %v", err) } sourceHash := seedCommit(t, repo, nil) targetHash := seedCommit(t, repo, nil)
tagRef := plumbing.NewTagReferenceName("v1.0") sourceRefs := map[plumbing.ReferenceName]plumbing.Hash{ tagRef: sourceHash, }
desired, _, err := BuildDesiredRefs(sourceRefs, PlanConfig{IncludeTags: true}) if err != nil { t.Fatalf("BuildDesiredRefs error: %v", err) }
targetRefs := map[plumbing.ReferenceName]plumbing.Hash{ tagRef: targetHash, }
plans, err := BuildPlans(repo.Storer, desired, targetRefs, map[plumbing.ReferenceName]ManagedTarget{ tagRef: {Kind: RefKindTag, Label: "v1.0"}, }, PlanConfig{IncludeTags: true, Force: true}) if err != nil { t.Fatalf("BuildPlans error: %v", err) } if len(plans) != 1 { t.Fatalf("expected 1 plan, got %d", len(plans)) } if plans[0].Action != ActionUpdate { t.Fatalf("expected ActionUpdate for force-retarget tag, got %s", plans[0].Action) } }
func TestBuildDesiredRefsDuplicateMappingTarget(t *testing.T) { // Two different source refs mapping to the same target via ValidateMappings // should be rejected before BuildDesiredRefs even resolves hashes. sourceRefs := map[plumbing.ReferenceName]plumbing.Hash{ plumbing.NewBranchReferenceName("main"): plumbing.NewHash("1111111111111111111111111111111111111111"), plumbing.NewBranchReferenceName("release"): plumbing.NewHash("2222222222222222222222222222222222222222"), }
_, _, err := BuildDesiredRefs(sourceRefs, PlanConfig{ Mappings: []RefMapping{ {Source: "main", Target: "stable"}, {Source: "release", Target: "stable"}, }, }) if err == nil { t.Fatalf("expected error for duplicate target ref from two different sources") } }
func TestCanBootstrapRelayAllAbsent(t *testing.T) { hash := plumbing.NewHash("1111111111111111111111111111111111111111") desired := map[plumbing.ReferenceName]DesiredRef{ "refs/heads/main": { Kind: RefKindBranch, Label: "main", SourceRef: "refs/heads/main", TargetRef: "refs/heads/main", SourceHash: hash, }, "refs/heads/dev": { Kind: RefKindBranch, Label: "dev", SourceRef: "refs/heads/dev", TargetRef: "refs/heads/dev", SourceHash: hash, }, } targetRefs := map[plumbing.ReferenceName]plumbing.Hash{}
ok, reason := CanBootstrapRelay(false, false, desired, targetRefs) if !ok { t.Fatalf("expected CanBootstrapRelay=true when all absent, got reason: %s", reason) } }
func TestCanBootstrapRelayOneExists(t *testing.T) { hash := plumbing.NewHash("1111111111111111111111111111111111111111") desired := map[plumbing.ReferenceName]DesiredRef{ "refs/heads/main": { Kind: RefKindBranch, Label: "main", SourceRef: "refs/heads/main", TargetRef: "refs/heads/main", SourceHash: hash, }, "refs/heads/dev": { Kind: RefKindBranch, Label: "dev", SourceRef: "refs/heads/dev", TargetRef: "refs/heads/dev", SourceHash: hash, }, } targetRefs := map[plumbing.ReferenceName]plumbing.Hash{ "refs/heads/main": plumbing.NewHash("2222222222222222222222222222222222222222"), }
ok, reason := CanBootstrapRelay(false, false, desired, targetRefs) if ok { t.Fatalf("expected CanBootstrapRelay=false when one target exists") } if reason != "bootstrap-target-ref-exists" { t.Fatalf("unexpected reason: %s", reason) } }
func TestCanIncrementalRelayMixed(t *testing.T) { // A mix of branch update + tag update (not create) should return false. // CanIncrementalRelay requires tags to have ActionCreate only. plans := []BranchPlan{ { Branch: "main", SourceRef: "refs/heads/main", TargetRef: "refs/heads/main", SourceHash: plumbing.NewHash("1111111111111111111111111111111111111111"), TargetHash: plumbing.NewHash("2222222222222222222222222222222222222222"), Kind: RefKindBranch, Action: ActionUpdate, }, { Branch: "v1.0", SourceRef: "refs/tags/v1.0", TargetRef: "refs/tags/v1.0", SourceHash: plumbing.NewHash("3333333333333333333333333333333333333333"), TargetHash: plumbing.NewHash("4444444444444444444444444444444444444444"), Kind: RefKindTag, Action: ActionUpdate, // tag update, not create }, }
// Build a minimal AdvRefs with capabilities to pass the capability check. advRefs := &packp.AdvRefs{} advRefs.Capabilities = capability.NewList()
ok, reason := CanIncrementalRelay(false, false, false, plans, advRefs) if ok { t.Fatalf("expected CanIncrementalRelay=false for tag with ActionUpdate") } if reason != "incremental-tag-action-not-create" { t.Fatalf("unexpected reason: %s", reason) } }
func seedCommit(tb testing.TB, repo *git.Repository, parents []plumbing.Hash) plumbing.Hash { tb.Helper() now := time.Now().UTC() obj := repo.Storer.NewEncodedObject() commit := &object.Commit{ Author: object.Signature{Name: "test", Email: "test@example.com", When: now}, Committer: object.Signature{Name: "test", Email: "test@example.com", When: now}, Message: fmt.Sprintf("test-%d-%d", len(parents), now.UnixNano()), TreeHash: plumbing.ZeroHash, ParentHashes: parents, } if err := commit.Encode(obj); err != nil { tb.Fatalf("encode commit: %v", err) } hash, err := repo.Storer.SetEncodedObject(obj) if err != nil { tb.Fatalf("store commit: %v", err) } return hash }
Ainternal/planner/planner\_test.go+756
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101
package planner
import ( "github.com/go-git/go-git/v5/plumbing" "github.com/go-git/go-git/v5/plumbing/protocol/packp" "github.com/go-git/go-git/v5/plumbing/protocol/packp/capability" )
// CanBootstrapRelay checks whether all desired target refs are absent on the target, // making a bootstrap relay possible. func CanBootstrapRelay( force, prune bool, desired map[plumbing.ReferenceName]DesiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash, ) (bool, string) { if force || prune { return false, "bootstrap-disabled-by-force-or-prune" } if len(desired) == 0 { return false, "bootstrap-no-managed-refs" } for targetRef := range desired { if !targetRefs[targetRef].IsZero() { return false, "bootstrap-target-ref-exists" } } return true, "empty-target-managed-refs" }
// CanIncrementalRelay checks whether all plans are eligible for the incremental // relay fast-path (fast-forward branch updates + new tag creates). func CanIncrementalRelay(force, prune, dryRun bool, plans []BranchPlan, targetAdv *packp.AdvRefs) (bool, string) { if force || prune || dryRun { return false, "incremental-disabled-by-force-prune-or-dry-run" } if len(plans) == 0 { return false, "incremental-no-plans" } if targetAdv == nil || targetAdv.Capabilities == nil { return false, "incremental-missing-target-capabilities" } if targetAdv.Capabilities.Supports(capability.Capability("no-thin")) { return false, "incremental-target-no-thin" }
for _, plan := range plans { switch plan.Kind { case RefKindBranch: if !plan.SourceRef.IsBranch() || !plan.TargetRef.IsBranch() { return false, "incremental-non-branch-mapping" } if plan.Action != ActionUpdate { return false, "incremental-branch-action-not-update" } if plan.TargetHash.IsZero() { return false, "incremental-branch-target-missing" } case RefKindTag: if !plan.SourceRef.IsTag() || !plan.TargetRef.IsTag() { return false, "incremental-non-tag-mapping" } if plan.Action != ActionCreate { return false, "incremental-tag-action-not-create" } default: return false, "incremental-unsupported-ref-kind" } } return true, "fast-forward-branch-or-tag-create" }
// CanFullTagCreateRelay checks whether all plans are tag creates, eligible for // a full-pack tag relay. func CanFullTagCreateRelay(plans []BranchPlan) (bool, string) { if len(plans) == 0 { return false, "incremental-no-plans" } for _, plan := range plans { if plan.Kind != RefKindTag { return false, "incremental-tag-relay-non-tag-plan" } if !plan.SourceRef.IsTag() || !plan.TargetRef.IsTag() { return false, "incremental-tag-relay-non-tag-mapping" } if plan.Action != ActionCreate { return false, "incremental-tag-relay-tag-action-not-create" } } return true, "tag-create-full-pack" }
// RelayFallbackReason returns the reason why relay was not used. func RelayFallbackReason(force, prune, dryRun bool, plans []BranchPlan, targetAdv *packp.AdvRefs) string { if ok, reason := CanIncrementalRelay(force, prune, dryRun, plans, targetAdv); ok { return reason } else if ok, reason := CanFullTagCreateRelay(plans); ok { return reason } else { return reason } }
Ainternal/planner/relay.go+101
package planner
import (
"encoding/json"
"fmt"
"sort"
"strings"
"github.com/go-git/go-git/v5/plumbing"
)
// RefKind distinguishes branch refs from tag refs.
type RefKind string
const (
RefKindBranch RefKind = "branch"
RefKindTag RefKind = "tag"
)
// Action represents the planned operation on a ref.
type Action string
const (
ActionCreate Action = "create"
ActionUpdate Action = "update"
ActionDelete Action = "delete"
ActionSkip Action = "skip"
ActionBlock Action = "block"
)
// RefMapping is a user-specified source:target mapping.
type RefMapping struct {
Source string
Target string
}
// DesiredRef represents a source ref that should be mirrored to a target ref.
type DesiredRef struct {
Kind RefKind
Label string
SourceRef plumbing.ReferenceName
TargetRef plumbing.ReferenceName
SourceHash plumbing.Hash
}
// ManagedTarget tracks which target refs are managed by git-sync.
type ManagedTarget struct {
Kind RefKind
Label string
}
// BranchPlan describes the planned action for a single ref.
type BranchPlan struct {
Branch string `json:"branch"`
SourceRef plumbing.ReferenceName `json:"source_ref"`
TargetRef plumbing.ReferenceName `json:"target_ref"`
SourceHash plumbing.Hash `json:"source_hash"`
TargetHash plumbing.Hash `json:"target_hash"`
Kind RefKind `json:"kind"`
Action Action `json:"action"`
Reason string `json:"reason"`
}
func (p BranchPlan) MarshalJSON() ([]byte, error) {
type bp struct {
Branch string `json:"branch"`
SourceRef string `json:"source_ref"`
TargetRef string `json:"target_ref"`
SourceHash string `json:"source_hash"`
TargetHash string `json:"target_hash"`
Kind RefKind `json:"kind"`
Action Action `json:"action"`
Reason string `json:"reason"`
}
return json.Marshal(bp{
Branch: p.Branch,
SourceRef: p.SourceRef.String(),
TargetRef: p.TargetRef.String(),
SourceHash: p.SourceHash.String(),
TargetHash: p.TargetHash.String(),
Kind: p.Kind,
Action: p.Action,
Reason: p.Reason,
})
}
// ShortHash returns the first 8 characters of a hash, or "<zero>" for zero hashes.
func ShortHash(hash plumbing.Hash) string {
if hash.IsZero() {
return "<zero>"
}
s := hash.String()
if len(s) > 8 {
return s[:8]
}
return s
}
// RefKindFromName infers the ref kind from a fully qualified ref name.
func RefKindFromName(name plumbing.ReferenceName) RefKind {
switch {
case name.IsBranch():
return RefKindBranch
case name.IsTag():
return RefKindTag
default:
return ""
}
}
// ActionForTargetHash returns ActionCreate for zero hashes, ActionUpdate otherwise.
func ActionForTargetHash(hash plumbing.Hash) Action {
if hash.IsZero() {
return ActionCreate
}
return ActionUpdate
}
// BranchMapFromRefHashMap extracts short branch names from a ref hash map.
func BranchMapFromRefHashMap(refs map[plumbing.ReferenceName]plumbing.Hash) map[string]plumbing.Hash {
branches := make(map[string]plumbing.Hash)
for name, hash := range refs {
if name.IsBranch() {
branches[name.Short()] = hash
}
}
return branches
}
// SelectBranches filters branches to only the requested ones.
// If requested is empty, returns all.
func SelectBranches(source map[string]plumbing.Hash, requested []string) map[string]plumbing.Hash {
if len(requested) == 0 {
return source
}
selected := make(map[string]plumbing.Hash, len(requested))
for _, branch := range requested {
if hash, ok := source[branch]; ok {
selected[branch] = hash
}
}
return selected
}
// RefPrefixes computes the ref-prefix arguments for v2 ls-refs based on
// the user's configuration.
func RefPrefixes(mappings []RefMapping, includeTags bool) []string {
prefixSet := map[string]struct{}{}
if len(mappings) > 0 {
for _, m := range mappings {
src := strings.TrimSpace(m.Source)
if strings.HasPrefix(src, "refs/tags/") {
prefixSet["refs/tags/"] = struct{}{}
} else if strings.HasPrefix(src, "refs/heads/") {
prefixSet["refs/heads/"] = struct{}{}
} else if !strings.HasPrefix(src, "refs/") {
prefixSet["refs/heads/"] = struct{}{}
}
}
} else {
prefixSet["refs/heads/"] = struct{}{}
}
if includeTags {
prefixSet["refs/tags/"] = struct{}{}
}
prefixes := make([]string, 0, len(prefixSet))
for p := range prefixSet {
prefixes = append(prefixes, p)
}
sort.Strings(prefixes)
return prefixes
}
// CopyRefHashMap returns a shallow copy of a ref hash map.
func CopyRefHashMap(input map[plumbing.ReferenceName]plumbing.Hash) map[plumbing.ReferenceName]plumbing.Hash {
out := make(map[plumbing.ReferenceName]plumbing.Hash, len(input))
for k, v := range input {
out[k] = v
}
return out
}
// DesiredSubset returns the subset of desired refs that match the given plans.
func DesiredSubset(
desired map[plumbing.ReferenceName]DesiredRef,
plans []BranchPlan,
) map[plumbing.ReferenceName]DesiredRef {
out := make(map[plumbing.ReferenceName]DesiredRef, len(plans))
for _, plan := range plans {
if ref, ok := desired[plan.TargetRef]; ok {
out[plan.TargetRef] = ref
}
}
return out
}
// SingleDesired builds a single-entry desired ref map.
func SingleDesired(sourceRef, targetRef plumbing.ReferenceName, hash plumbing.Hash) map[plumbing.ReferenceName]DesiredRef {
return map[plumbing.ReferenceName]DesiredRef{
targetRef: {
Kind: RefKindBranch,
Label: targetRef.Short(),
SourceRef: sourceRef,
TargetRef: targetRef,
SourceHash: hash,
},
}
}
// SingleHaveMap builds a single-entry have map for fetch negotiation.
func SingleHaveMap(hash plumbing.Hash) map[plumbing.ReferenceName]plumbing.Hash {
if hash.IsZero() {
return nil
}
return map[plumbing.ReferenceName]plumbing.Hash{
plumbing.ReferenceName("refs/gitsync/have"): hash,
}
}
// BootstrapTempRef returns the temporary ref name used during batched bootstrap.
func BootstrapTempRef(targetRef plumbing.ReferenceName) plumbing.ReferenceName {
return plumbing.ReferenceName("refs/gitsync/bootstrap/heads/" + targetRef.Short())
}
// FormatPlanLine formats a single plan entry for human-readable output.
func FormatPlanLine(plan BranchPlan) string {
label := plan.Branch
if plan.TargetRef != "" {
label = plan.TargetRef.String()
}
line := fmt.Sprintf("%s %s", strings.ToUpper(string(plan.Action)), label)
if plan.Reason != "" {
line += " - " + plan.Reason
}
return line
}
Ainternal/planner/types.go+236
// Package bootstrap implements the bootstrap relay strategy for git-sync. // This handles initial seeding of an empty target, both one-shot and batched. package bootstrap
import ( "context" "encoding/json" "errors" "fmt" "io" "net/http" "os" "regexp" "strconv" "strings"
git "github.com/go-git/go-git/v5" "github.com/go-git/go-git/v5/plumbing" "github.com/go-git/go-git/v5/plumbing/protocol/packp" "github.com/go-git/go-git/v5/plumbing/protocol/packp/capability" "github.com/go-git/go-git/v5/storage/memory"
"github.com/soph/git-sync/internal/gitproto" "github.com/soph/git-sync/internal/planner" )
const ( defaultAutoBatchMaxPackBytes = 512 * 1024 * 1024 githubLargeRepoThresholdKB = 1536 * 1024 )
var bodyLimitPattern = regexp.MustCompile(body exceeded size limit ([0-9]+))
// GitHubRepoAPIBaseURL is the base for GitHub API calls (replaceable in tests). var GitHubRepoAPIBaseURL = "https://api.github.com"
// Params holds the inputs for a bootstrap execution. type Params struct { SourceConn *gitproto.Conn TargetConn *gitproto.Conn SourceService *gitproto.RefService TargetAdv *packp.AdvRefs DesiredRefs map[plumbing.ReferenceName]planner.DesiredRef TargetRefs map[plumbing.ReferenceName]plumbing.Hash MaxPackBytes int64 BatchMaxPack int64 Verbose bool }
// Result holds the outcome of the bootstrap strategy. type Result struct { Plans []planner.BranchPlan Pushed int Relay bool RelayMode string RelayReason string Batching bool BatchCount int PlannedBatchCount int TempRefs []string }
// Execute runs the bootstrap strategy (one-shot or batched). func Execute(ctx context.Context, p Params, relayReason string) (Result, error) { plans, err := planner.BuildBootstrapPlans(p.DesiredRefs, p.TargetRefs) if err != nil { return Result{}, err }
result := Result{ Plans: plans, Relay: true, RelayMode: "bootstrap", RelayReason: relayReason, }
// GitHub large-repo preflight if batchLimit, ok := githubBatchLimit(ctx, p); ok { p.BatchMaxPack = batchLimit progressf(p.Verbose, "bootstrap: github repo-size preflight selected batched mode with batch-max-pack-bytes=%d", p.BatchMaxPack) }
if p.BatchMaxPack > 0 { return executeBatched(ctx, p, plans, result) }
// One-shot bootstrap progressf(p.Verbose, "bootstrap: fetching %d ref(s) from source", len(plans)) gpDesired := toGP(p.DesiredRefs) packReader, err := p.SourceService.FetchPack(ctx, p.SourceConn, gpDesired, nil) if err != nil { if errors.Is(err, git.NoErrAlreadyUpToDate) { return result, nil } return result, fmt.Errorf("fetch source pack: %w", err) } packReader = gitproto.LimitPackReader(packReader, p.MaxPackBytes)
progressf(p.Verbose, "bootstrap: pushing %d ref(s) to target", len(plans)) cmds := gitproto.ToPushCommands(plansToPushPlans(plans)) pushErr := gitproto.PushPack(ctx, p.TargetConn, p.TargetAdv, cmds, packReader, p.Verbose) if pushErr != nil { autoBatch, ok := autoBatchMaxPackBytes(p, pushErr) if !ok { return result, fmt.Errorf("push target refs: %w", pushErr) } progressf(p.Verbose, "bootstrap: target rejected; retrying with batch-max-pack-bytes=%d", autoBatch) p.BatchMaxPack = autoBatch return executeBatched(ctx, p, plans, result) }
result.Pushed = len(plans) return result, nil }
// --- Batched bootstrap ---
func executeBatched( ctx context.Context, p Params, plans []planner.BranchPlan, result Result, ) (Result, error) { if p.SourceService.Protocol != "v2" { return result, fmt.Errorf("bootstrap batching currently requires protocol v2") } if p.SourceService.V2Caps == nil || !p.SourceService.V2Caps.FetchSupports("filter") { return result, fmt.Errorf("bootstrap batching requires source fetch filter support") }
planRefs := make([]planner.DesiredRef, 0, len(plans)) tagPlans := make([]planner.BranchPlan, 0, len(plans)) tagDesired := make(map[plumbing.ReferenceName]gitproto.DesiredRef) for _, plan := range plans { if plan.Kind == planner.RefKindTag { tagPlans = append(tagPlans, plan) if d, ok := p.DesiredRefs[plan.TargetRef]; ok { tagDesired[plan.TargetRef] = gitproto.DesiredRef{ SourceRef: d.SourceRef, TargetRef: d.TargetRef, SourceHash: d.SourceHash, IsTag: true, } } continue } if !plan.SourceRef.IsBranch() || !plan.TargetRef.IsBranch() { return result, fmt.Errorf("bootstrap batching currently supports branch refs and create-only tags") } planRefs = append(planRefs, p.DesiredRefs[plan.TargetRef]) }
var batches []planner.BootstrapBatch if len(planRefs) > 0 { progressf(p.Verbose, "bootstrap-batch: planning checkpoints for %d branch ref(s)", len(planRefs)) var err error batches, err = planBatches(ctx, p, planRefs) if err != nil { return result, err } }
batchLimit := p.BatchMaxPack if p.MaxPackBytes > 0 && (batchLimit == 0 || p.MaxPackBytes < batchLimit) { batchLimit = p.MaxPackBytes }
for _, batch := range batches { result.PlannedBatchCount += len(batch.Checkpoints) result.TempRefs = append(result.TempRefs, batch.TempRef.String()) progressf(p.Verbose, "bootstrap-batch: branch=%s temp-ref=%s planned-batches=%d resume=%s", batch.Plan.TargetRef, batch.TempRef, len(batch.Checkpoints), planner.ShortHash(batch.ResumeHash))
current := batch.ResumeHash startIdx, err := planner.BootstrapResumeIndex(batch.Checkpoints, batch.ResumeHash) if err != nil { return result, fmt.Errorf("resume bootstrap batch for %s: %w", batch.Plan.TargetRef, err) }
for idx := startIdx; idx < len(batch.Checkpoints); idx++ { checkpoint := batch.Checkpoints[idx] progressf(p.Verbose, "bootstrap-batch: branch=%s batch=%d/%d from=%s to=%s", batch.Plan.TargetRef, idx+1, len(batch.Checkpoints), planner.ShortHash(current), planner.ShortHash(checkpoint))
stagePlans := []planner.BranchPlan{{ Branch: batch.Plan.Branch, SourceRef: batch.Plan.SourceRef, TargetRef: batch.TempRef, SourceHash: checkpoint, TargetHash: current, Kind: batch.Plan.Kind, Action: planner.ActionForTargetHash(current), Reason: fmt.Sprintf("%s -> %s via %s", planner.ShortHash(current), planner.ShortHash(checkpoint), batch.TempRef), }} if idx == len(batch.Checkpoints)-1 { stagePlans = append(stagePlans, planner.BranchPlan{ Branch: batch.Plan.Branch, SourceRef: batch.Plan.SourceRef, TargetRef: batch.Plan.TargetRef, SourceHash: checkpoint, TargetHash: plumbing.ZeroHash, Kind: batch.Plan.Kind, Action: planner.ActionCreate, Reason: fmt.Sprintf("create %s at %s", batch.Plan.TargetRef, planner.ShortHash(checkpoint)), }) }
desired := singleGP(batch.Plan.SourceRef, batch.TempRef, checkpoint) haves := planner.SingleHaveMap(current) packReader, err := p.SourceService.FetchPack(ctx, p.SourceConn, desired, haves) if err != nil { return result, fmt.Errorf("fetch source batch pack for %s: %w", batch.Plan.TargetRef, err) } packReader = gitproto.LimitPackReader(packReader, batchLimit) cmds := gitproto.ToPushCommands(plansToPushPlans(stagePlans)) if err := gitproto.PushPack(ctx, p.TargetConn, p.TargetAdv, cmds, packReader, p.Verbose); err != nil { return result, fmt.Errorf("push bootstrap batch for %s: %w", batch.Plan.TargetRef, err) } progressf(p.Verbose, "bootstrap-batch: branch=%s batch=%d/%d complete", batch.Plan.TargetRef, idx+1, len(batch.Checkpoints)) current = checkpoint result.BatchCount++ }
if current.IsZero() { return result, fmt.Errorf("bootstrap batching for %s completed with no checkpoint state", batch.Plan.TargetRef) } if batch.ResumeHash == batch.Plan.SourceHash { cmds := []gitproto.PushCommand{{Name: batch.Plan.TargetRef, Old: plumbing.ZeroHash, New: batch.Plan.SourceHash}} if err := gitproto.PushCommands(ctx, p.TargetConn, p.TargetAdv, cmds, p.Verbose); err != nil { return result, fmt.Errorf("resume bootstrap cutover for %s: %w", batch.Plan.TargetRef, err) } }
cmds := []gitproto.PushCommand{{Name: batch.TempRef, Old: current, Delete: true}} if err := gitproto.PushCommands(ctx, p.TargetConn, p.TargetAdv, cmds, p.Verbose); err != nil { return result, fmt.Errorf("delete bootstrap temp ref for %s: %w", batch.Plan.TargetRef, err) } progressf(p.Verbose, "bootstrap-batch: branch=%s finalized", batch.Plan.TargetRef) }
// Tag phase (issue #1) if len(tagPlans) > 0 { progressf(p.Verbose, "bootstrap-batch: pushing %d tag(s) after branch batches", len(tagPlans)) tagTargetRefs := planner.CopyRefHashMap(p.TargetRefs) for _, batch := range batches { tagTargetRefs[batch.Plan.TargetRef] = batch.Plan.SourceHash } packReader, err := p.SourceService.FetchPack(ctx, p.SourceConn, tagDesired, tagTargetRefs) if err != nil { if errors.Is(err, git.NoErrAlreadyUpToDate) { cmds := gitproto.ToPushCommands(plansToPushPlans(tagPlans)) if err := gitproto.PushCommands(ctx, p.TargetConn, p.TargetAdv, cmds, p.Verbose); err != nil { return result, fmt.Errorf("create tag refs after bootstrap: %w", err) } } else { return result, fmt.Errorf("fetch bootstrap tag pack: %w", err) } } else { packReader = gitproto.LimitPackReader(packReader, p.MaxPackBytes) cmds := gitproto.ToPushCommands(plansToPushPlans(tagPlans)) if err := gitproto.PushPack(ctx, p.TargetConn, p.TargetAdv, cmds, packReader, p.Verbose); err != nil { return result, fmt.Errorf("push bootstrap tags: %w", err) } } }
result.Pushed = len(plans) result.Batching = true result.RelayMode = "bootstrap-batch" return result, nil }
// --- Checkpoint planning ---
func planBatches(ctx context.Context, p Params, desired []planner.DesiredRef) ([]planner.BootstrapBatch, error) { out := make([]planner.BootstrapBatch, 0, len(desired)) for _, ref := range desired { checkpoints, err := PlanCheckpoints(ctx, p, ref) if err != nil { return nil, err } out = append(out, planner.BootstrapBatch{ Plan: planner.BranchPlan{ Branch: ref.Label, SourceRef: ref.SourceRef, TargetRef: ref.TargetRef, SourceHash: ref.SourceHash, Kind: ref.Kind, Action: planner.ActionCreate, }, TempRef: planner.BootstrapTempRef(ref.TargetRef), ResumeHash: p.TargetRefs[planner.BootstrapTempRef(ref.TargetRef)], Checkpoints: checkpoints, }) } return out, nil }
// PlanCheckpoints plans the checkpoint hashes for a single branch during batched bootstrap. func PlanCheckpoints(ctx context.Context, p Params, ref planner.DesiredRef) ([]plumbing.Hash, error) { progressf(p.Verbose, "bootstrap-batch: fetching commit graph for %s", ref.TargetRef) graphStore := memory.NewStorage() gpRef := gitproto.DesiredRef{SourceRef: ref.SourceRef, TargetRef: ref.TargetRef, SourceHash: ref.SourceHash} if err := p.SourceService.FetchCommitGraph(ctx, graphStore, p.SourceConn, gpRef); err != nil { return nil, fmt.Errorf("fetch bootstrap planning graph for %s: %w", ref.TargetRef, err) } chain, err := planner.FirstParentChain(graphStore, ref.SourceHash) if err != nil { return nil, fmt.Errorf("walk first-parent chain for %s: %w", ref.TargetRef, err) } if len(chain) == 0 { return nil, fmt.Errorf("empty first-parent chain for %s", ref.TargetRef) }
// Issue #14: Use a commit-count heuristic for the initial span estimate // to reduce expensive fetch-and-discard probes. Typical compressed commit // + tree overhead averages ~2-5 KiB per commit in a mature repo. const avgBytesPerCommit = 4096 initialSpan := 0 if p.BatchMaxPack > 0 { initialSpan = int(p.BatchMaxPack / avgBytesPerCommit) if initialSpan > len(chain) { initialSpan = len(chain) } if initialSpan < 1 { initialSpan = 1 } }
checkpoints := make([]plumbing.Hash, 0, len(chain)) prevIdx := -1 prevHash := plumbing.ZeroHash prevSpan := initialSpan for prevIdx < len(chain)-1 { bestIdx, err := planner.SampledCheckpointUnderLimit(chain, prevIdx, prevSpan, func(idx int) (bool, error) { tooLarge, err := packExceedsLimit(ctx, p, ref, chain[idx], prevHash, p.BatchMaxPack) if err != nil { return false, fmt.Errorf("measure bootstrap batch for %s at %s: %w", ref.TargetRef, planner.ShortHash(chain[idx]), err) } return tooLarge, nil }) if err != nil { return nil, err } if bestIdx <= prevIdx { return nil, fmt.Errorf("could not find bootstrap checkpoint for %s under batch-max-pack-bytes=%d", ref.TargetRef, p.BatchMaxPack) } prevSpan = bestIdx - prevIdx prevIdx = bestIdx prevHash = chain[bestIdx] checkpoints = append(checkpoints, prevHash) progressf(p.Verbose, "bootstrap-batch: branch=%s planned-checkpoint=%s selected=%d chain-len=%d", ref.TargetRef, planner.ShortHash(prevHash), len(checkpoints), len(chain)) } return checkpoints, nil }
func packExceedsLimit(ctx context.Context, p Params, ref planner.DesiredRef, want, have plumbing.Hash, limit int64) (bool, error) { desired := singleGP(ref.SourceRef, ref.TargetRef, want) haves := planner.SingleHaveMap(have) packReader, err := p.SourceService.FetchPack(ctx, p.SourceConn, desired, haves) if err != nil { return false, err } defer packReader.Close() _, err = io.Copy(io.Discard, gitproto.LimitPackReader(packReader, limit)) if err == nil { return false, nil } if strings.Contains(err.Error(), "source pack exceeded max-pack-bytes limit") { return true, nil } return false, err }
// --- GitHub preflight ---
func githubBatchLimit(ctx context.Context, p Params) (int64, bool) { if p.BatchMaxPack > 0 || p.SourceConn == nil || p.SourceConn.Endpoint == nil { return 0, false } if p.SourceService == nil || p.SourceService.Protocol != "v2" { return 0, false } if p.SourceService.V2Caps == nil || !p.SourceService.V2Caps.FetchSupports("filter") { return 0, false } repoSizeKB, ok := lookupGitHubRepoSizeKB(ctx, p.SourceConn) if !ok || repoSizeKB < githubLargeRepoThresholdKB { return 0, false } limit := int64(defaultAutoBatchMaxPackBytes) if p.MaxPackBytes > 0 && p.MaxPackBytes < limit { limit = p.MaxPackBytes } if limit <= 0 { return 0, false } return limit, true }
func lookupGitHubRepoSizeKB(ctx context.Context, conn *gitproto.Conn) (int64, bool) {
owner, repo, ok := GitHubOwnerRepo(conn)
if !ok {
return 0, false
}
apiURL := strings.TrimRight(GitHubRepoAPIBaseURL, "/") + "/repos/" + owner + "/" + repo
req, err := http.NewRequestWithContext(ctx, http.MethodGet, apiURL, nil)
if err != nil {
return 0, false
}
req.Header.Set("Accept", "application/vnd.github+json")
req.Header.Set("X-GitHub-Api-Version", "2022-11-28")
req.Header.Set("User-Agent", capability.DefaultAgent())
req.Header.Set(gitproto.StatsPhaseHeader, "github repo metadata")
resp, err := conn.HTTP.Do(req)
if err != nil {
return 0, false
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return 0, false
}
var payload struct{ Size int64 json:"size" }
if err := json.NewDecoder(resp.Body).Decode(&payload); err != nil || payload.Size <= 0 {
return 0, false
}
return payload.Size, true
}
// GitHubOwnerRepo extracts the owner/repo from a GitHub endpoint. func GitHubOwnerRepo(conn *gitproto.Conn) (string, string, bool) { if conn == nil || conn.Endpoint == nil { return "", "", false } ep := conn.Endpoint if ep.Protocol != "http" && ep.Protocol != "https" { return "", "", false } if !strings.EqualFold(ep.Host, "github.com") { return "", "", false } path := strings.TrimSuffix(strings.Trim(ep.Path, "/"), ".git") parts := strings.Split(path, "/") if len(parts) != 2 || parts[0] == "" || parts[1] == "" { return "", "", false } return parts[0], parts[1], true }
func autoBatchMaxPackBytes(p Params, err error) (int64, bool) { if p.BatchMaxPack > 0 || !isTargetBodyLimitError(err) { return 0, false } if p.SourceService == nil || p.SourceService.Protocol != "v2" { return 0, false } if p.SourceService.V2Caps == nil || !p.SourceService.V2Caps.FetchSupports("filter") { return 0, false } limit := int64(defaultAutoBatchMaxPackBytes) if targetLimit := targetBodyLimit(err); targetLimit > 0 { derived := targetLimit / 2 if derived <= 0 { derived = targetLimit } if derived < limit { limit = derived } } if p.MaxPackBytes > 0 && p.MaxPackBytes < limit { limit = p.MaxPackBytes } if limit <= 0 { return 0, false } return limit, true }
func isTargetBodyLimitError(err error) bool { if err == nil { return false } msg := strings.ToLower(err.Error()) return strings.Contains(msg, "body exceeded size limit") || (strings.Contains(msg, "request body") && strings.Contains(msg, "too large")) || (strings.Contains(msg, "payload") && strings.Contains(msg, "too large")) || strings.Contains(msg, "http 413") }
func targetBodyLimit(err error) int64 { if err == nil { return 0 } matches := bodyLimitPattern.FindStringSubmatch(strings.ToLower(err.Error())) if len(matches) != 2 { return 0 } limit, parseErr := strconv.ParseInt(matches[1], 10, 64) if parseErr != nil { return 0 } return limit }
// --- Shared helpers ---
func toGP(desired map[plumbing.ReferenceName]planner.DesiredRef) map[plumbing.ReferenceName]gitproto.DesiredRef { out := make(map[plumbing.ReferenceName]gitproto.DesiredRef, len(desired)) for k, v := range desired { out[k] = gitproto.DesiredRef{ SourceRef: v.SourceRef, TargetRef: v.TargetRef, SourceHash: v.SourceHash, IsTag: v.Kind == planner.RefKindTag, } } return out }
func singleGP(sourceRef, targetRef plumbing.ReferenceName, hash plumbing.Hash) map[plumbing.ReferenceName]gitproto.DesiredRef { return map[plumbing.ReferenceName]gitproto.DesiredRef{ targetRef: {SourceRef: sourceRef, TargetRef: targetRef, SourceHash: hash}, } }
func plansToPushPlans(plans []planner.BranchPlan) []gitproto.PushPlan { out := make([]gitproto.PushPlan, len(plans)) for i, p := range plans { out[i] = gitproto.PushPlan{ TargetRef: p.TargetRef, TargetHash: p.TargetHash, SourceHash: p.SourceHash, Delete: p.Action == planner.ActionDelete, } } return out }
func progressf(verbose bool, format string, args ...any) { if !verbose { return } fmt.Fprintf(os.Stderr, "[git-sync] %s\n", fmt.Sprintf(format, args...)) }
Ainternal/strategy/bootstrap/bootstrap.go+528
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package bootstrap
import ( "errors" "testing" )
func TestIsTargetBodyLimitError(t *testing.T) { tests := []struct { name string err error want bool }{ { name: "nil error", err: nil, want: false, }, { name: "body exceeded size limit", err: errors.New("body exceeded size limit 1048576"), want: true, }, { name: "case insensitive body exceeded", err: errors.New("Body Exceeded Size Limit 999"), want: true, }, { name: "request body too large", err: errors.New("request body is too large"), want: true, }, { name: "payload too large", err: errors.New("payload is too large for this endpoint"), want: true, }, { name: "HTTP 413", err: errors.New("server returned HTTP 413"), want: true, }, { name: "unrelated error", err: errors.New("connection refused"), want: false, }, { name: "partial match body without too large", err: errors.New("request body is fine"), want: false, }, }
for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { got := isTargetBodyLimitError(tt.err) if got != tt.want { t.Errorf("isTargetBodyLimitError(%v) = %v, want %v", tt.err, got, tt.want) } }) } }
func TestTargetBodyLimit(t *testing.T) { tests := []struct { name string err error want int64 }{ { name: "nil error", err: nil, want: 0, }, { name: "extracts numeric limit from error", err: errors.New("body exceeded size limit 1048576"), want: 1048576, }, { name: "no limit in error message", err: errors.New("connection refused"), want: 0, }, { name: "limit with surrounding text", err: errors.New("push target refs: body exceeded size limit 536870912 bytes"), want: 536870912, }, { name: "case insensitive match", err: errors.New("Body Exceeded Size Limit 2097152"), want: 2097152, }, { name: "no number after pattern", err: errors.New("body exceeded size limit"), want: 0, }, }
for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { got := targetBodyLimit(tt.err) if got != tt.want { t.Errorf("targetBodyLimit(%v) = %d, want %d", tt.err, got, tt.want) } }) } }
Ainternal/strategy/bootstrap/bootstrap\_test.go+112
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// Package incremental implements the incremental relay strategy for git-sync. // This fast-path streams a pack from source directly to target when all updates // are fast-forward branch updates or new tag creates. package incremental
import ( "context" "fmt"
"github.com/go-git/go-git/v5/plumbing" "github.com/go-git/go-git/v5/plumbing/protocol/packp"
"github.com/soph/git-sync/internal/gitproto" "github.com/soph/git-sync/internal/planner" )
// Params holds the inputs for an incremental relay execution. type Params struct { SourceConn *gitproto.Conn TargetConn *gitproto.Conn SourceService *gitproto.RefService TargetAdv *packp.AdvRefs DesiredRefs map[plumbing.ReferenceName]planner.DesiredRef TargetRefs map[plumbing.ReferenceName]plumbing.Hash PushPlans []planner.BranchPlan MaxPackBytes int64 Verbose bool }
// Result holds the outcome of an incremental relay. type Result struct { Relay bool RelayMode string RelayReason string }
// Execute attempts the incremental relay strategy. Returns (result, nil) on // success, or (zero, nil) if the strategy is not applicable. Errors indicate // a relay was attempted but failed. func Execute(ctx context.Context, p Params, cfg planner.PlanConfig) (Result, error) { if ok, reason := planner.CanIncrementalRelay(cfg.Force, cfg.Prune, false, p.PushPlans, p.TargetAdv); ok { desired := toGP(planner.DesiredSubset(p.DesiredRefs, p.PushPlans)) packReader, err := p.SourceService.FetchPack(ctx, p.SourceConn, desired, p.TargetRefs) if err != nil { return Result{}, fmt.Errorf("fetch source pack: %w", err) } packReader = gitproto.LimitPackReader(packReader, p.MaxPackBytes) cmds := gitproto.ToPushCommands(plansToPushPlans(p.PushPlans)) if err := gitproto.PushPack(ctx, p.TargetConn, p.TargetAdv, cmds, packReader, p.Verbose); err != nil { return Result{}, fmt.Errorf("push target refs: %w", err) } return Result{Relay: true, RelayMode: "incremental", RelayReason: reason}, nil }
if ok, reason := planner.CanFullTagCreateRelay(p.PushPlans); ok { desired := toGP(planner.DesiredSubset(p.DesiredRefs, p.PushPlans)) packReader, err := p.SourceService.FetchPack(ctx, p.SourceConn, desired, nil) if err != nil { return Result{}, fmt.Errorf("fetch source tag pack: %w", err) } packReader = gitproto.LimitPackReader(packReader, p.MaxPackBytes) cmds := gitproto.ToPushCommands(plansToPushPlans(p.PushPlans)) if err := gitproto.PushPack(ctx, p.TargetConn, p.TargetAdv, cmds, packReader, p.Verbose); err != nil { return Result{}, fmt.Errorf("push target refs: %w", err) } return Result{Relay: true, RelayMode: "incremental", RelayReason: reason}, nil }
return Result{}, nil }
func plansToPushPlans(plans []planner.BranchPlan) []gitproto.PushPlan { out := make([]gitproto.PushPlan, len(plans)) for i, p := range plans { out[i] = gitproto.PushPlan{ TargetRef: p.TargetRef, TargetHash: p.TargetHash, SourceHash: p.SourceHash, Delete: p.Action == planner.ActionDelete, } } return out }
Ainternal/strategy/incremental/incremental.go+92
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// Package materialized implements the materialized fallback push strategy. // This path fetches objects into local memory, then encodes and pushes them // to the target. Used when relay is not safe. package materialized
import ( "context" "fmt"
git "github.com/go-git/go-git/v5" "github.com/go-git/go-git/v5/plumbing" "github.com/go-git/go-git/v5/plumbing/protocol/packp" "github.com/go-git/go-git/v5/plumbing/storer"
"github.com/soph/git-sync/internal/gitproto" "github.com/soph/git-sync/internal/planner" )
// Params holds the inputs for a materialized push. type Params struct { Store storer.Storer SourceConn *gitproto.Conn SourceService *gitproto.RefService TargetConn *gitproto.Conn TargetAdv *packp.AdvRefs DesiredRefs map[plumbing.ReferenceName]planner.DesiredRef TargetRefs map[plumbing.ReferenceName]plumbing.Hash PushPlans []planner.BranchPlan Verbose bool }
// MaxMaterializedObjects is the safety limit for the materialized fallback path. // Beyond this count, the in-memory object store would consume excessive memory. // Fail early rather than OOM (issue #15). const MaxMaterializedObjects = 500_000
// Execute runs the materialized fallback: ensures tag objects are local, // computes the object closure, and pushes to the target. func Execute(ctx context.Context, p Params) error { if len(p.PushPlans) == 0 { return nil }
// Ensure tag objects are fetched locally if err := ensureTagObjects(ctx, p); err != nil { return fmt.Errorf("prepare local objects for push: %w", err) }
objects := make([]plumbing.Hash, 0, len(p.PushPlans)) for _, plan := range p.PushPlans { if plan.Action == planner.ActionCreate || plan.Action == planner.ActionUpdate { objects = append(objects, plan.SourceHash) } } hashes, err := planner.ObjectsToPush(p.Store, objects, p.TargetRefs) if err != nil { return fmt.Errorf("compute objects to push: %w", err) }
// Issue #15: guard against unbounded memory usage on large non-relay syncs. if len(hashes) > MaxMaterializedObjects { return fmt.Errorf( "materialized push requires %d objects (limit %d); use bootstrap for large initial syncs", len(hashes), MaxMaterializedObjects, ) }
cmds := gitproto.ToPushCommands(plansToPushPlans(p.PushPlans)) if err := gitproto.PushObjects(ctx, p.TargetConn, p.TargetAdv, cmds, p.Store, hashes, p.Verbose); err != nil { return fmt.Errorf("push target refs: %w", err) } return nil }
func ensureTagObjects(ctx context.Context, p Params) error { tagDesired := make(map[plumbing.ReferenceName]gitproto.DesiredRef) for _, plan := range p.PushPlans { if plan.Kind != planner.RefKindTag { continue } if d, ok := p.DesiredRefs[plan.TargetRef]; ok { tagDesired[plan.TargetRef] = gitproto.DesiredRef{ SourceRef: d.SourceRef, TargetRef: d.TargetRef, SourceHash: d.SourceHash, IsTag: true, } } } if len(tagDesired) == 0 { return nil } err := p.SourceService.FetchToStore(ctx, p.Store, p.SourceConn, tagDesired, nil) if err != nil && err != git.NoErrAlreadyUpToDate { return err } return nil }
Ainternal/strategy/materialized/materialized.go+107
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import (
"context"
"encoding/json"
"fmt"
"net/http"
"net/http/httptest"
"os"
"path/filepath"
"testing"
"time"
"github.com/go-git/go-git/v5/plumbing/transport"
transporthttp "github.com/go-git/go-git/v5/plumbing/transport/http"
"github.com/soph/git-sync/internal/auth"
)
func TestResolveAuthMethodPrefersExplicitToken(t *testing.T) {
2 unmodified lines
t.Fatalf("new endpoint: %v", err)
}
originalFill := gitCredentialFillCommand
t.Cleanup(func() {
gitCredentialFillCommand = originalFill
})
gitCredentialFillCommand = func(ctx context.Context, input string) ([]byte, error) {
originalFill := auth.GitCredentialFillCommand
t.Cleanup(func() { auth.GitCredentialFillCommand = originalFill })
auth.GitCredentialFillCommand = func(ctx context.Context, input string) ([]byte, error) {
t.Fatalf("unexpected git credential fill call with input %q", input)
return nil, nil
}
auth, err := resolveAuthMethod(Endpoint{
resolved, err := auth.Resolve(auth.Endpoint{
Username: "git",
Token: "explicit-token",
}, ep)
1 unmodified line
t.Fatalf("resolve auth: %v", err)
}
basic, ok := auth.(*transporthttp.BasicAuth)
basic, ok := resolved.(*transporthttp.BasicAuth)
if !ok {
t.Fatalf("expected basic auth, got %T", auth)
t.Fatalf("expected basic auth, got %T", resolved)
}
if basic.Username != "git" || basic.Password != "explicit-token" {
t.Fatalf("unexpected auth: %+v", basic)
}
}
func TestNewTransportConnSkipTLSVerify(t *testing.T) {
conn, err := newTransportConn(Endpoint{
func TestNewConnSkipTLSVerify(t *testing.T) {
stats := newStats(false)
conn, err := newConn(Endpoint{
URL: "https://example.com/repo.git",
SkipTLSVerify: true,
}, "source", newStats(false))
}, "source", stats)
if err != nil {
t.Fatalf("new transport conn: %v", err)
t.Fatalf("new conn: %v", err)
}
roundTripper, ok := conn.http.Transport.(*countingRoundTripper)
rt, ok := conn.HTTP.Transport.(*countingRoundTripper)
if !ok {
t.Fatalf("expected countingRoundTripper, got %T", conn.http.Transport)
t.Fatalf("expected countingRoundTripper, got %T", conn.HTTP.Transport)
}
base, ok := roundTripper.base.(*http.Transport)
base, ok := rt.base.(*http.Transport)
if !ok {
t.Fatalf("expected *http.Transport base, got %T", roundTripper.base)
t.Fatalf("expected *http.Transport base, got %T", rt.base)
}
if base.TLSClientConfig == nil || !base.TLSClientConfig.InsecureSkipVerify {
t.Fatalf("expected InsecureSkipVerify transport, got %#v", base.TLSClientConfig)
t.Fatalf("expected InsecureSkipVerify transport")
}
}
8 unmodified lines
if err != nil {
t.Fatalf("new endpoint: %v", err)
}
credHost := endpointCredentialHost(ep)
credHost := ep.Host
if ep.Port > 0 {
credHost = ep.Host + ":8080"
}
writeEntireDBHostsFile(t, configDir, credHost, "test-user")
if err := writeEntireDBStoredToken("entire:"+credHost, "test-user", "stored-token"); err != nil {
// Store token with a future expiration so it's not treated as expired (issue #7).
futureExpiry := time.Now().Unix() + 3600
if err := auth.WriteStoredToken("entire:"+credHost, "test-user", fmt.Sprintf("stored-token|%d", futureExpiry)); err != nil {
t.Fatalf("write token: %v", err)
}
auth, err := resolveAuthMethod(Endpoint{}, ep)
resolved, err := auth.Resolve(auth.Endpoint{}, ep)
if err != nil {
t.Fatalf("resolve auth: %v", err)
}
basic, ok := auth.(*transporthttp.BasicAuth)
basic, ok := resolved.(*transporthttp.BasicAuth)
if !ok {
t.Fatalf("expected basic auth, got %T", auth)
t.Fatalf("expected basic auth, got %T", resolved)
}
if basic.Username != "git" || basic.Password != "stored-token" {
t.Fatalf("unexpected auth: %+v", basic)
26 unmodified lines
if err != nil {
t.Fatalf("new endpoint: %v", err)
}
credHost := endpointCredentialHost(ep)
credHost := ep.Host
if ep.Port > 0 {
credHost = ep.Host + ":" + itoa(ep.Port)
}
writeEntireDBHostsFile(t, configDir, credHost, "test-user")
if err := writeEntireDBStoredToken("entire:"+credHost, "test-user", encodeTokenWithExpiration("expired-token", -3600)); err != nil {
// Expired token: expiration in the past
if err := auth.WriteStoredToken("entire:"+credHost, "test-user", "expired-token|1"); err != nil {
t.Fatalf("write expired token: %v", err)
}
if err := writeEntireDBStoredToken("entire:"+credHost+":refresh", "test-user", "refresh-token"); err != nil {
if err := auth.WriteStoredToken("entire:"+credHost+":refresh", "test-user", "refresh-token"); err != nil {
t.Fatalf("write refresh token: %v", err)
}
auth, err := resolveAuthMethod(Endpoint{SkipTLSVerify: true}, ep)
resolved, err := auth.Resolve(auth.Endpoint{SkipTLSVerify: true}, ep)
if err != nil {
t.Fatalf("resolve auth: %v", err)
}
basic, ok := auth.(*transporthttp.BasicAuth)
basic, ok := resolved.(*transporthttp.BasicAuth)
if !ok {
t.Fatalf("expected basic auth, got %T", auth)
t.Fatalf("expected basic auth, got %T", resolved)
}
if basic.Password != "new-token" {
t.Fatalf("unexpected password: %q", basic.Password)
}
stored, err := readEntireDBStoredToken("entire:"+credHost, "test-user")
if err != nil {
t.Fatalf("read stored token: %v", err)
}
token, _ := decodeTokenWithExpiration(stored)
if token != "new-token" {
t.Fatalf("unexpected refreshed token: %q", token)
}
}
func writeEntireDBHostsFile(t *testing.T, configDir, host, username string) {
t.Helper()
hosts := map[string]map[string]any{
host: {
"activeUser": username,
"users": []string{username},
},
host: {"activeUser": username, "users": []string{username}},
}
data, err := json.Marshal(hosts)
if err != nil {
3 unmodified lines
t.Fatalf("write hosts: %v", err)
}
}
func itoa(n int) string {
return fmt.Sprintf("%d", n)
}
Minternal/syncer/auth_test.go+48/-47
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"testing"
"github.com/go-git/go-git/v5/plumbing"
"github.com/soph/git-sync/internal/gitproto"
"github.com/soph/git-sync/internal/planner"
bstrap "github.com/soph/git-sync/internal/strategy/bootstrap"
)
const gitHTTPBackendEnv = "GITSYNC_E2E_GIT_HTTP_BACKEND"
438 unmodified lines
if result.PlannedBatchCount != result.BatchCount {
t.Fatalf("expected fresh batched bootstrap to complete all planned batches, got %+v", result)
}
if len(result.TempRefs) != 1 || result.TempRefs[0] != bootstrapTempRef(plumbing.NewBranchReferenceName(testBranch)).String() {
if len(result.TempRefs) != 1 || result.TempRefs[0] != planner.BootstrapTempRef(plumbing.NewBranchReferenceName(testBranch)).String() {
t.Fatalf("unexpected temp refs in batched bootstrap result: %+v", result)
}
assertGitRefEqual(t, sourceBare, targetBare, plumbing.NewBranchReferenceName(testBranch))
assertGitRefAbsent(t, targetBare, bootstrapTempRef(plumbing.NewBranchReferenceName(testBranch)))
assertGitRefAbsent(t, targetBare, planner.BootstrapTempRef(plumbing.NewBranchReferenceName(testBranch)))
}
func TestBootstrap_GitHTTPBackendBatchedBranchResume(t *testing.T) {
40 unmodified lines
}
stats := newStats(false)
sourceConn, err := newTransportConn(cfg.Source, "source", stats)
sourceConn, err := newConn(cfg.Source, "source", stats)
if err != nil {
t.Fatalf("create source transport: %v", err)
}
sourceRefs, sourceService, err := listSourceRefs(context.Background(), sourceConn, cfg)
sourceRefs, sourceService, err := gitproto.ListSourceRefs(context.Background(), sourceConn, cfg.ProtocolMode, planner.RefPrefixes(cfg.Mappings, cfg.IncludeTags))
if err != nil {
t.Fatalf("list source refs: %v", err)
}
desired, _, err := buildDesiredRefs(refHashMap(sourceRefs), cfg)
desired, _, err := planner.BuildDesiredRefs(gitproto.RefHashMap(sourceRefs), planner.PlanConfig{
Branches: cfg.Branches, Mappings: cfg.Mappings, IncludeTags: cfg.IncludeTags,
Force: cfg.Force, Prune: cfg.Prune,
})
if err != nil {
t.Fatalf("build desired refs: %v", err)
}
ref := desired[plumbing.NewBranchReferenceName(testBranch)]
checkpoints, err := planBootstrapBranchCheckpoints(context.Background(), cfg, sourceConn, sourceService, ref)
bParams := bstrap.Params{
SourceConn: sourceConn, SourceService: sourceService,
BatchMaxPack: cfg.BatchMaxPackBytes, Verbose: cfg.Verbose,
}
checkpoints, err := bstrap.PlanCheckpoints(context.Background(), bParams, ref)
if err != nil {
t.Fatalf("plan checkpoints: %v", err)
}
1 unmodified line
t.Fatalf("expected multiple checkpoints for resume test, got %v", checkpoints)
}
tempRef := bootstrapTempRef(plumbing.NewBranchReferenceName(testBranch))
tempRef := planner.BootstrapTempRef(plumbing.NewBranchReferenceName(testBranch))
runGit(t, worktree, "push", targetBare, checkpoints[0].String()+":"+tempRef.String())
result, err := Bootstrap(context.Background(), cfg)
77 unmodified lines
assertGitRefEqual(t, sourceBare, targetBare, plumbing.NewBranchReferenceName(testBranch))
assertGitRefEqual(t, sourceBare, targetBare, plumbing.NewTagReferenceName("v1"))
assertGitRefAbsent(t, targetBare, bootstrapTempRef(plumbing.NewBranchReferenceName(testBranch)))
assertGitRefAbsent(t, targetBare, planner.BootstrapTempRef(plumbing.NewBranchReferenceName(testBranch)))
}
type gitHTTPBackendServer struct {
Minternal/syncer/git_http_backend_test.go+18/-8
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transporthttp "github.com/go-git/go-git/v5/plumbing/transport/http"
transportserver "github.com/go-git/go-git/v5/plumbing/transport/server"
"github.com/go-git/go-git/v5/storage/memory"
"github.com/soph/git-sync/internal/auth"
"github.com/soph/git-sync/internal/gitproto"
"github.com/soph/git-sync/internal/planner"
)
const testBranch = "master"
461 unmodified lines
defer sourceServer.Close()
defer targetServer.Close()
originalFill := gitCredentialFillCommand
originalFill := auth.GitCredentialFillCommand
t.Cleanup(func() {
gitCredentialFillCommand = originalFill
auth.GitCredentialFillCommand = originalFill
})
gitCredentialFillCommand = func(ctx context.Context, input string) ([]byte, error) {
auth.GitCredentialFillCommand = func(ctx context.Context, input string) ([]byte, error) {
if !strings.Contains(input, "protocol=http\n") {
t.Fatalf("expected protocol in credential input, got %q", input)
}
332 unmodified lines
if err != nil {
t.Fatalf("source head: %v", err)
}
chain, err := firstParentChain(sourceRepo, head.Hash())
chain, err := planner.FirstParentChain(sourceRepo.Storer, head.Hash())
if err != nil {
t.Fatalf("build commit chain: %v", err)
}
710 unmodified lines
}
func decodeV2TestCommandRequest(body []byte) (v2TestCommandRequest, error) {
reader := newPacketReader(bytes.NewReader(body))
reader := gitproto.NewPacketReader(bytes.NewReader(body))
req := v2TestCommandRequest{}
inArgs := false
3 unmodified lines
return req, err
}
switch kind {
case packetTypeFlush:
case gitproto.PacketFlush:
return req, nil
case packetTypeDelim:
case gitproto.PacketDelim:
inArgs = true
case packetTypeData:
case gitproto.PacketData:
line := strings.TrimSuffix(string(payload), "\n")
if strings.HasPrefix(line, "command=") {
req.Command = strings.TrimPrefix(line, "command=")
Minternal/syncer/integration_test.go+11/-8
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package syncer
import (
"runtime"
"sync"
"time"
)
// Measurement holds performance measurement data.
type Measurement struct {
Enabled bool `json:"enabled"`
ElapsedMillis int64 `json:"elapsed_millis"`
PeakAllocBytes uint64 `json:"peak_alloc_bytes"`
PeakHeapInuseBytes uint64 `json:"peak_heap_inuse_bytes"`
TotalAllocBytes uint64 `json:"total_alloc_bytes"`
GCCount uint32 `json:"gc_count"`
}
func startMeasurement(enabled bool) func() Measurement {
if !enabled {
return func() Measurement { return Measurement{} }
}
start := time.Now()
var startStats runtime.MemStats
runtime.ReadMemStats(&startStats)
done := make(chan struct{})
var (
mu sync.Mutex
peakAlloc = startStats.Alloc
peakHeapInuse = startStats.HeapInuse
result Measurement
)
go func() {
ticker := time.NewTicker(200 * time.Millisecond)
defer ticker.Stop()
for {
select {
case <-done:
return
case <-ticker.C:
var current runtime.MemStats
runtime.ReadMemStats(¤t)
mu.Lock()
if current.Alloc > peakAlloc {
peakAlloc = current.Alloc
}
if current.HeapInuse > peakHeapInuse {
peakHeapInuse = current.HeapInuse
}
mu.Unlock()
}
}
}()
var once sync.Once
return func() Measurement {
once.Do(func() {
close(done)
var endStats runtime.MemStats
runtime.ReadMemStats(&endStats)
mu.Lock()
if endStats.Alloc > peakAlloc {
peakAlloc = endStats.Alloc
}
if endStats.HeapInuse > peakHeapInuse {
peakHeapInuse = endStats.HeapInuse
}
result = Measurement{
Enabled: true,
ElapsedMillis: time.Since(start).Milliseconds(),
PeakAllocBytes: peakAlloc,
PeakHeapInuseBytes: peakHeapInuse,
TotalAllocBytes: endStats.TotalAlloc - startStats.TotalAlloc,
GCCount: endStats.NumGC - startStats.NumGC,
}
mu.Unlock()
})
return result
}
}
Ainternal/syncer/measurement.go+83
package syncer
import ( "bufio" "bytes" "context" "errors" "fmt" "io" "net/http" "sort" "strings"
git "github.com/go-git/go-git/v5" "github.com/go-git/go-git/v5/plumbing" "github.com/go-git/go-git/v5/plumbing/format/packfile" "github.com/go-git/go-git/v5/plumbing/format/pktline" "github.com/go-git/go-git/v5/plumbing/protocol/packp" "github.com/go-git/go-git/v5/plumbing/protocol/packp/capability" "github.com/go-git/go-git/v5/plumbing/protocol/packp/sideband" "github.com/go-git/go-git/v5/plumbing/transport" transporthttp "github.com/go-git/go-git/v5/plumbing/transport/http" "github.com/go-git/go-git/v5/utils/ioutil" )
const ( delimPkt = "0001" responseEndPkt = "0002" statsPhaseHdr = "X-Git-Sync-Stats-Phase" )
type packetType int
const ( packetTypeData packetType = iota packetTypeFlush packetTypeDelim packetTypeResponseEnd )
type v2CapabilityAdvertisement struct { Capabilities map[string]string }
func (a *v2CapabilityAdvertisement) Supports(name string) bool { if a == nil { return false } _, ok := a.Capabilities[name] return ok }
func (a *v2CapabilityAdvertisement) Value(name string) string { if a == nil { return "" } return a.Capabilities[name] }
type packetReader struct { r *bufio.Reader }
func newPacketReader(r io.Reader) *packetReader { if br, ok := r.(*bufio.Reader); ok { return &packetReader{r: br} } return &packetReader{r: bufio.NewReader(r)} }
func (r *packetReader) Reader() *bufio.Reader { return r.r }
func (r *packetReader) ReadPacket() (packetType, []byte, error) { header := make([]byte, 4) if _, err := io.ReadFull(r.r, header); err != nil { return packetTypeData, nil, err }
switch string(header) { case "0000": return packetTypeFlush, nil, nil case delimPkt: return packetTypeDelim, nil, nil case responseEndPkt: return packetTypeResponseEnd, nil, nil }
var headerArr [4]byte copy(headerArr[:], header) n, err := pktlineLength(headerArr) if err != nil { return packetTypeData, nil, err } if n <= 4 { return packetTypeData, nil, pktline.ErrInvalidPktLen }
payload := make([]byte, n-4) if _, err := io.ReadFull(r.r, payload); err != nil { return packetTypeData, nil, err } return packetTypeData, payload, nil }
func pktlineLength(header [4]byte) (int, error) { var n int for _, b := range header { value, err := asciiHexToByte(b) if err != nil { return 0, pktline.ErrInvalidPktLen } n = 16*n + int(value) } return n, nil }
func asciiHexToByte(b byte) (byte, error) { switch { case b >= '0' && b <= '9': return b - '0', nil case b >= 'a' && b <= 'f': return b - 'a' + 10, nil case b >= 'A' && b <= 'F': return b - 'A' + 10, nil default: return 0, pktline.ErrInvalidPktLen } }
func decodeV2CapabilityAdvertisement(r io.Reader) (*v2CapabilityAdvertisement, error) { reader := newPacketReader(r)
var ( kind packetType payload []byte err error ) for { kind, payload, err = reader.ReadPacket() if err != nil { return nil, err } if kind == packetTypeFlush { continue } if kind != packetTypeData { return nil, fmt.Errorf("unexpected packet type %v before protocol advertisement", kind) } if strings.HasPrefix(string(payload), "# service=") { continue } if string(payload) != "version 2\n" { return nil, fmt.Errorf("unexpected protocol advertisement %q", payload) } break }
adv := &v2CapabilityAdvertisement{Capabilities: map[string]string{}} for { kind, payload, err = reader.ReadPacket() if err != nil { return nil, err } if kind == packetTypeFlush { return adv, nil } if kind != packetTypeData { return nil, fmt.Errorf("unexpected packet type %v in capability advertisement", kind) }
line := strings.TrimSuffix(string(payload), "\n") name, value, _ := strings.Cut(line, "=") adv.Capabilities[name] = value } }
func encodeV2CommandRequest(command string, capabilityArgs []string, commandArgs []string) ([]byte, error) { var buf bytes.Buffer enc := pktline.NewEncoder(&buf) if err := enc.EncodeString("command=" + command + "\n"); err != nil { return nil, err } for _, arg := range capabilityArgs { if err := enc.EncodeString(arg + "\n"); err != nil { return nil, err } } if len(commandArgs) > 0 { if _, err := buf.WriteString(delimPkt); err != nil { return nil, err } for _, arg := range commandArgs { if err := enc.EncodeString(arg + "\n"); err != nil { return nil, err } } } if err := enc.Flush(); err != nil { return nil, err } return buf.Bytes(), nil }
type sourceRefService struct { protocol string v1 *packp.AdvRefs v2 *v2CapabilityAdvertisement }
func listSourceRefs(ctx context.Context, conn *transportConn, cfg Config) ([]*plumbing.Reference, *sourceRefService, error) { switch cfg.ProtocolMode { case protocolModeV1: adv, refs, err := listSourceRefsV1(ctx, conn) if err != nil { return nil, nil, err } return refs, &sourceRefService{protocol: protocolModeV1, v1: adv}, nil case protocolModeAuto, protocolModeV2: data, err := requestInfoRefs(ctx, conn, transport.UploadPackServiceName, "version=2") if err != nil { return nil, nil, err }
if adv, err := decodeV2CapabilityAdvertisement(bytes.NewReader(data)); err == nil { if !adv.Supports("ls-refs") || !adv.Supports("fetch") { return nil, nil, fmt.Errorf("source does not advertise required protocol v2 commands") } refs, err := listSourceRefsV2(ctx, conn, adv, cfg) if err != nil { return nil, nil, err } return refs, &sourceRefService{protocol: protocolModeV2, v2: adv}, nil }
if cfg.ProtocolMode == protocolModeV2 { return nil, nil, fmt.Errorf("source did not negotiate protocol v2") }
adv, err := decodeV1AdvertisedRefs(data) if err != nil { return nil, nil, err } refs, err := advertisedReferences(adv) if err != nil { return nil, nil, err } return refs, &sourceRefService{protocol: protocolModeV1, v1: adv}, nil default: return nil, nil, fmt.Errorf("unsupported protocol mode %q", cfg.ProtocolMode) } }
func (s *sourceRefService) Fetch(ctx context.Context, repo *git.Repository, conn *transportConn, desired map[plumbing.ReferenceName]desiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash) error { switch s.protocol { case protocolModeV2: return fetchSourceRefsV2(ctx, repo, conn, s.v2, desired, targetRefs) case protocolModeV1: return fetchSourceRefsWithHavesV1(ctx, repo, conn, s.v1, desired, targetRefs) default: return fmt.Errorf("unsupported source protocol %q", s.protocol) } }
func (s *sourceRefService) FetchPack(ctx context.Context, conn *transportConn, desired map[plumbing.ReferenceName]desiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash) (io.ReadCloser, error) { switch s.protocol { case protocolModeV2: return fetchSourcePackV2(ctx, conn, s.v2, desired, targetRefs) case protocolModeV1: return fetchSourcePackV1(ctx, conn, s.v1, desired, targetRefs) default: return nil, fmt.Errorf("unsupported source protocol %q", s.protocol) } }
func sourceCapabilities(s *sourceRefService) []string { switch s.protocol { case protocolModeV2: keys := make([]string, 0, len(s.v2.Capabilities)) for key, value := range s.v2.Capabilities { if value == "" { keys = append(keys, key) continue } keys = append(keys, key+"="+value) } sort.Strings(keys) return keys case protocolModeV1: if s.v1 == nil || s.v1.Capabilities == nil { return nil } all := s.v1.Capabilities.All() items := make([]string, 0, len(all)) for _, cap := range all { values := s.v1.Capabilities.Get(cap) if len(values) == 0 { items = append(items, string(cap)) continue } for _, value := range values { items = append(items, string(cap)+"="+value) } } sort.Strings(items) return items default: return nil } }
func advCapabilities(adv *packp.AdvRefs) []string { if adv == nil || adv.Capabilities == nil { return nil } all := adv.Capabilities.All() items := make([]string, 0, len(all)) for _, cap := range all { values := adv.Capabilities.Get(cap) if len(values) == 0 { items = append(items, string(cap)) continue } for _, value := range values { items = append(items, string(cap)+"="+value) } } sort.Strings(items) return items }
func listSourceRefsV1(ctx context.Context, conn *transportConn) (*packp.AdvRefs, []*plumbing.Reference, error) { adv, err := advertisedRefsV1(ctx, conn, transport.UploadPackServiceName) if err != nil { return nil, nil, err } refs, err := advertisedReferences(adv) if err != nil { return nil, nil, err } return adv, refs, nil }
func listSourceRefsV2(ctx context.Context, conn *transportConn, adv *v2CapabilityAdvertisement, cfg Config) ([]*plumbing.Reference, error) { args := []string{"peel"} for _, prefix := range sourceRefPrefixes(cfg) { args = append(args, "ref-prefix "+prefix) }
body, err := encodeV2CommandRequest("ls-refs", v2RequestCapabilities(adv), args) if err != nil { return nil, err }
data, err := postRPCWithPhase(ctx, conn, transport.UploadPackServiceName, body, true, "upload-pack ls-refs") if err != nil { return nil, err } return decodeV2LSRefs(bytes.NewReader(data)) }
func fetchSourceRefsV2( ctx context.Context, repo *git.Repository, conn *transportConn, adv *v2CapabilityAdvertisement, desired map[plumbing.ReferenceName]desiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash, ) error { wants := make([]plumbing.Hash, 0, len(desired)) for _, ref := range desired { wants = append(wants, ref.SourceHash) } wants = sortedUniqueHashes(wants) haves := sortedUniqueHashes(mapsRefValues(targetRefs)) if len(wants) == 0 { return git.NoErrAlreadyUpToDate }
commandArgs := make([]string, 0, len(wants)+len(haves)+4) commandArgs = append(commandArgs, "ofs-delta", "no-progress") for _, hash := range wants { commandArgs = append(commandArgs, "want "+hash.String()) } for _, hash := range haves { commandArgs = append(commandArgs, "have "+hash.String()) } commandArgs = append(commandArgs, "done") conn.stats.addWantsHaves("source upload-pack", len(wants), len(haves))
body, err := encodeV2CommandRequest("fetch", v2RequestCapabilities(adv), commandArgs) if err != nil { return err }
reader, err := postRPCStreamWithPhase(ctx, conn, transport.UploadPackServiceName, body, true, "upload-pack fetch") if err != nil { return err } defer ioutil.CheckClose(reader, &err)
if err := storeV2FetchPack(repo, reader); err != nil { return err }
return storeFetchedSourceRefs(repo, desired) }
func fetchSourceCommitGraphV2( ctx context.Context, repo *git.Repository, conn *transportConn, adv *v2CapabilityAdvertisement, ref desiredRef, ) error { if !fetchCapabilitySupports(adv, "filter") { return fmt.Errorf("source does not advertise fetch filter support") }
commandArgs := []string{ "ofs-delta", "no-progress", "filter tree:0", "want " + ref.SourceHash.String(), "done", } conn.stats.addWantsHaves("source upload-pack", 1, 0)
body, err := encodeV2CommandRequest("fetch", v2RequestCapabilities(adv), commandArgs) if err != nil { return err }
if err := storeV2FetchPack(repo, reader); err != nil { return err } return storeFetchedSourceRefs(repo, singleDesiredRef(ref.SourceRef, ref.TargetRef, ref.SourceHash)) }
func fetchSourcePackV2( ctx context.Context, conn *transportConn, adv *v2CapabilityAdvertisement, desired map[plumbing.ReferenceName]desiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash, ) (io.ReadCloser, error) { body, wants, haves, err := sourceFetchRequestV2(adv, desired, targetRefs) if err != nil { return nil, err } if wants == 0 { return nil, git.NoErrAlreadyUpToDate } conn.stats.addWantsHaves("source upload-pack", wants, haves)
reader, err := postRPCStreamWithPhase(ctx, conn, transport.UploadPackServiceName, body, true, "upload-pack fetch") if err != nil { return nil, err } packReader, err := openV2FetchPackStream(reader) if err != nil { _ = reader.Close() return nil, err } return packReader, nil }
func storeV2FetchPack(repo *git.Repository, r io.Reader) error { reader := newPacketReader(r) for { kind, payload, err := reader.ReadPacket() if err != nil { if errors.Is(err, io.EOF) { return nil } return fmt.Errorf("decode protocol v2 fetch response: %w", err) }
switch kind { case packetTypeFlush: return nil case packetTypeDelim, packetTypeResponseEnd: continue case packetTypeData: line := string(payload) switch line { case "packfile\n": demux := sideband.NewDemuxer(sideband.Sideband64k, reader.Reader()) if err := packfile.UpdateObjectStorage(repo.Storer, demux); err != nil { return fmt.Errorf("store source packfile: %w", err) } return nil case "acknowledgments\n", "shallow-info\n": if err := skipV2Section(reader); err != nil { return err } default: return fmt.Errorf("unexpected protocol v2 fetch section %q", strings.TrimSpace(line)) } } } }
func openV2FetchPackStream(body io.ReadCloser) (io.ReadCloser, error) { reader := newPacketReader(body) for { kind, payload, err := reader.ReadPacket() if err != nil { if errors.Is(err, io.EOF) { return nil, io.ErrUnexpectedEOF } return nil, fmt.Errorf("decode protocol v2 fetch response: %w", err) }
switch kind { case packetTypeFlush: return nil, io.ErrUnexpectedEOF case packetTypeDelim, packetTypeResponseEnd: continue case packetTypeData: line := string(payload) switch line { case "packfile\n": return &wrappedReadCloser{ Reader: sideband.NewDemuxer(sideband.Sideband64k, reader.Reader()), Closer: body, }, nil case "acknowledgments\n", "shallow-info\n": if err := skipV2Section(reader); err != nil { return nil, err } default: return nil, fmt.Errorf("unexpected protocol v2 fetch section %q", strings.TrimSpace(line)) } } } }
func skipV2Section(reader *packetReader) error { for { kind, _, err := reader.ReadPacket() if err != nil { return err } if kind == packetTypeDelim || kind == packetTypeFlush { return nil } } }
func decodeV2LSRefs(r io.Reader) ([]*plumbing.Reference, error) { reader := newPacketReader(r) var refs []*plumbing.Reference for { kind, payload, err := reader.ReadPacket() if err != nil { return nil, err } if kind == packetTypeFlush { return refs, nil } if kind != packetTypeData { return nil, fmt.Errorf("unexpected packet type %v in ls-refs response", kind) }
fields := strings.Fields(strings.TrimSpace(string(payload))) if len(fields) < 2 { return nil, fmt.Errorf("malformed ls-refs response line %q", payload) } hash := plumbing.NewHash(fields[0]) name := plumbing.ReferenceName(fields[1]) refs = append(refs, plumbing.NewHashReference(name, hash)) } }
func sourceRefPrefixes(cfg Config) []string { prefixSet := map[string]struct{}{}
addPrefix := func(ref plumbing.ReferenceName) { switch { case ref.IsBranch(): prefixSet["refs/heads/"] = struct{}{} case ref.IsTag(): prefixSet["refs/tags/"] = struct{}{} } }
if len(cfg.Mappings) > 0 { for _, mapping := range cfg.Mappings { sourceRef, _, _, err := normalizeMapping(mapping) if err != nil { continue } addPrefix(sourceRef) } } else { prefixSet["refs/heads/"] = struct{}{} } if cfg.IncludeTags { prefixSet["refs/tags/"] = struct{}{} }
prefixes := make([]string, 0, len(prefixSet)) for prefix := range prefixSet { prefixes = append(prefixes, prefix) } sort.Strings(prefixes) return prefixes }
func fetchCapabilitySupports(adv *v2CapabilityAdvertisement, feature string) bool { if adv == nil { return false } values := strings.Fields(adv.Value("fetch")) for _, value := range values { if value == feature { return true } } return false }
func v2RequestCapabilities(adv *v2CapabilityAdvertisement) []string { var caps []string if agent := adv.Value("agent"); agent != "" { caps = append(caps, "agent="+capability.DefaultAgent()) } return caps }
func sourceFetchRequestV2( adv *v2CapabilityAdvertisement, desired map[plumbing.ReferenceName]desiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash, ) ([]byte, int, int, error) { wants := make([]plumbing.Hash, 0, len(desired)) for _, ref := range desired { wants = append(wants, ref.SourceHash) } wants = sortedUniqueHashes(wants) haves := sortedUniqueHashes(mapsRefValues(targetRefs)) if len(wants) == 0 { return nil, 0, 0, nil }
commandArgs := make([]string, 0, len(wants)+len(haves)+4) commandArgs = append(commandArgs, "ofs-delta", "no-progress") if desiredHasTag(desired) { commandArgs = append(commandArgs, "include-tag") } for _, hash := range wants { commandArgs = append(commandArgs, "want "+hash.String()) } for _, hash := range haves { commandArgs = append(commandArgs, "have "+hash.String()) } commandArgs = append(commandArgs, "done")
body, err := encodeV2CommandRequest("fetch", v2RequestCapabilities(adv), commandArgs) if err != nil { return nil, 0, 0, err } return body, len(wants), len(haves), nil }
type wrappedReadCloser struct { io.Reader io.Closer }
func storeFetchedSourceRefs(repo *git.Repository, desired map[plumbing.ReferenceName]desiredRef) error { for _, ref := range desired { localRef := plumbing.ReferenceName(localBranchRef(sourceRemoteName, ref.TargetRef.Short())) if ref.Kind == RefKindTag { localRef = plumbing.ReferenceName("refs/remotes/" + sourceRemoteName + "/tags/" + ref.TargetRef.Short()) } if err := repo.Storer.SetReference(plumbing.NewHashReference(localRef, ref.SourceHash)); err != nil { return fmt.Errorf("set local source ref %s: %w", ref.SourceRef, err) } } return nil }
func requestInfoRefs(ctx context.Context, conn transportConn, service, gitProtocol string) ([]byte, error) { url := fmt.Sprintf("%s/info/refs?service=%s", conn.endpoint.String(), service) req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil) if err != nil { return nil, err } req.Header.Set("Accept", "/*") req.Header.Set("User-Agent", capability.DefaultAgent()) req.Header.Set(statsPhaseHdr, service+" info-refs") if gitProtocol != "" { req.Header.Set("Git-Protocol", gitProtocol) } applyAuth(req, conn.authMethod())
res, err := conn.http.Do(req) if err != nil { return nil, err } defer res.Body.Close() if err := transporthttp.NewErr(res); err != nil { return nil, err } return io.ReadAll(res.Body) }
func advertisedRefsV1(ctx context.Context, conn *transportConn, service string) (*packp.AdvRefs, error) { data, err := requestInfoRefs(ctx, conn, service, "") if err != nil { return nil, err } return decodeV1AdvertisedRefs(data) }
func decodeV1AdvertisedRefs(data []byte) (*packp.AdvRefs, error) { ar := packp.NewAdvRefs() if err := ar.Decode(bytes.NewReader(data)); err != nil { if err == packp.ErrEmptyAdvRefs { return nil, transport.ErrEmptyRemoteRepository } return nil, err } return ar, nil }
func postRPC(ctx context.Context, conn *transportConn, service string, body []byte, gitProtocolV2 bool) ([]byte, error) { reader, err := postRPCStream(ctx, conn, service, body, gitProtocolV2) if err != nil { return nil, err } defer reader.Close() return io.ReadAll(reader) }
func postRPCWithPhase(ctx context.Context, conn *transportConn, service string, body []byte, gitProtocolV2 bool, phase string) ([]byte, error) { reader, err := postRPCStreamWithPhase(ctx, conn, service, body, gitProtocolV2, phase) if err != nil { return nil, err } defer reader.Close() return io.ReadAll(reader) }
func postRPCStream(ctx context.Context, conn *transportConn, service string, body []byte, gitProtocolV2 bool) (io.ReadCloser, error) { return postRPCStreamWithPhase(ctx, conn, service, body, gitProtocolV2, service) }
func postRPCStreamWithPhase(ctx context.Context, conn *transportConn, service string, body []byte, gitProtocolV2 bool, phase string) (io.ReadCloser, error) { url := fmt.Sprintf("%s/%s", conn.endpoint.String(), service) req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(body)) if err != nil { return nil, err } req.Header.Set("Content-Type", fmt.Sprintf("application/x-%s-request", service)) req.Header.Set("Accept", fmt.Sprintf("application/x-%s-result", service)) req.Header.Set("User-Agent", capability.DefaultAgent()) req.Header.Set(statsPhaseHdr, phase) if gitProtocolV2 { req.Header.Set("Git-Protocol", "version=2") } applyAuth(req, conn.authMethod())
res, err := conn.http.Do(req) if err != nil { return nil, err } if err := transporthttp.NewErr(res); err != nil { _ = res.Body.Close() return nil, err } return res.Body, nil }
Dinternal/syncer/protocol\_v2.go-782
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package syncer
import ( "bytes" "testing"
"github.com/go-git/go-git/v5/plumbing" )
func TestPacketReaderHandlesSpecialPackets(t *testing.T) { reader := newPacketReader(bytes.NewBufferString("0000000100020006a\n"))
kind, payload, err := reader.ReadPacket() if err != nil { t.Fatalf("read flush: %v", err) } if kind != packetTypeFlush || payload != nil { t.Fatalf("unexpected flush packet: kind=%v payload=%q", kind, payload) }
kind, payload, err = reader.ReadPacket() if err != nil { t.Fatalf("read delim: %v", err) } if kind != packetTypeDelim { t.Fatalf("unexpected delim kind: %v", kind) }
kind, payload, err = reader.ReadPacket() if err != nil { t.Fatalf("read response-end: %v", err) } if kind != packetTypeResponseEnd { t.Fatalf("unexpected response-end kind: %v", kind) }
kind, payload, err = reader.ReadPacket() if err != nil { t.Fatalf("read data: %v", err) } if kind != packetTypeData || string(payload) != "a\n" { t.Fatalf("unexpected data packet: kind=%v payload=%q", kind, payload) } }
func TestDecodeV2CapabilityAdvertisement(t *testing.T) { wire := "" + "000eversion 2\n" + "0013ls-refs=unborn\n" + "0012fetch=shallow\n" + "0013agent=git/test\n" + "0000"
adv, err := decodeV2CapabilityAdvertisement(bytes.NewBufferString(wire)) if err != nil { t.Fatalf("decode advertisement: %v", err) } if !adv.Supports("ls-refs") { t.Fatalf("expected ls-refs capability") } if got := adv.Value("fetch"); got != "shallow" { t.Fatalf("unexpected fetch value %q", got) } if got := adv.Value("agent"); got != "git/test" { t.Fatalf("unexpected agent value %q", got) } }
func TestEncodeV2CommandRequest(t *testing.T) { req, err := encodeV2CommandRequest( "ls-refs", []string{"agent=git-sync/test"}, []string{"peel", "ref-prefix refs/heads/"}, ) if err != nil { t.Fatalf("encode request: %v", err) }
want := "" + "0014command=ls-refs\n" + "0018agent=git-sync/test\n" + "0001" + "0009peel\n" + "001bref-prefix refs/heads/\n" + "0000" if string(req) != want { t.Fatalf("unexpected request:\n%s\nwant:\n%s", req, want) } }
func TestSourceFetchRequestV2IncludesIncludeTagForTagSync(t *testing.T) { adv := &v2CapabilityAdvertisement{ Capabilities: map[string]string{ "fetch": "thin-pack filter", }, } desired := map[plumbing.ReferenceName]desiredRef{ plumbing.NewTagReferenceName("v1"): { Kind: RefKindTag, Label: "v1", SourceRef: plumbing.NewTagReferenceName("v1"), TargetRef: plumbing.NewTagReferenceName("v1"), SourceHash: plumbing.NewHash("1111111111111111111111111111111111111111"), }, }
body, wants, haves, err := sourceFetchRequestV2(adv, desired, nil) if err != nil { t.Fatalf("build fetch request: %v", err) } if wants != 1 || haves != 0 { t.Fatalf("unexpected wants/haves: wants=%d haves=%d", wants, haves) } if !bytes.Contains(body, []byte("include-tag\n")) { t.Fatalf("expected include-tag in fetch request, got:\n%s", body) } }
Dinternal/syncer/protocol\_v2\_test.go-117
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package syncer
import ( "io" "net/http" "strings" "sync"
"github.com/soph/git-sync/internal/gitproto" )
// ServiceStats tracks transfer statistics for a single service.
type ServiceStats struct {
Name string json:"name"
Requests int json:"requests"
RequestBytes int64 json:"request_bytes"
ResponseBytes int64 json:"response_bytes"
Wants int json:"wants"
Haves int json:"haves"
Commands int json:"commands"
}
// Stats holds the collected transfer statistics.
type Stats struct {
Enabled bool json:"enabled"
Items map[string]*ServiceStats json:"items"
}
// statsCollector is a concurrency-safe stats collector (issue #8). type statsCollector struct { enabled bool mu sync.Mutex items map[string]*ServiceStats }
func newStats(enabled bool) *statsCollector { return &statsCollector{enabled: enabled, items: map[string]*ServiceStats{}} }
func (s *statsCollector) ensure(name string) *ServiceStats { item, ok := s.items[name] if !ok { item = &ServiceStats{Name: name} s.items[name] = item } return item }
func (s *statsCollector) addWantsHaves(name string, wants, haves int) { if !s.enabled { return } s.mu.Lock() defer s.mu.Unlock() item := s.ensure(name) item.Wants += wants item.Haves += haves }
func (s *statsCollector) addCommands(name string, commands int) { if !s.enabled { return } s.mu.Lock() defer s.mu.Unlock() item := s.ensure(name) item.Commands += commands }
func (s *statsCollector) recordRoundTrip(name string, requestBytes, responseBytes int64) { if !s.enabled { return } s.mu.Lock() defer s.mu.Unlock() item := s.ensure(name) item.Requests++ item.RequestBytes += requestBytes item.ResponseBytes += responseBytes }
func (s *statsCollector) snapshot() Stats { s.mu.Lock() defer s.mu.Unlock() out := Stats{Enabled: s.enabled, Items: make(map[string]*ServiceStats, len(s.items))} for key, item := range s.items { copyItem := *item out.Items[key] = ©Item } return out }
// countingRoundTripper wraps an HTTP transport to record transfer stats. type countingRoundTripper struct { base http.RoundTripper label string stats *statsCollector }
func (rt *countingRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) { res, err := rt.base.RoundTrip(req) if err != nil { return nil, err }
serviceName := req.Header.Get(gitproto.StatsPhaseHeader) if serviceName == "" { serviceName = req.URL.Query().Get("service") if serviceName == "" { serviceName = strings.TrimPrefix(req.URL.Path[strings.LastIndex(req.URL.Path, "/")+1:], "/") } } name := strings.TrimSpace(rt.label + " " + serviceName) requestBytes := req.ContentLength if requestBytes < 0 { requestBytes = 0 }
res.Body = &countingReadCloser{ ReadCloser: res.Body, onClose: func(n int64) { rt.stats.recordRoundTrip(name, requestBytes, n) }, } return res, nil }
type countingReadCloser struct { io.ReadCloser n int64 onClose func(int64) }
func (c *countingReadCloser) Read(p []byte) (int, error) { n, err := c.ReadCloser.Read(p) c.n += int64(n) return n, err }
func (c *countingReadCloser) Close() error { err := c.ReadCloser.Close() if c.onClose != nil { c.onClose(c.n) c.onClose = nil } return err }
Ainternal/syncer/stats.go+148
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// Package syncer provides the top-level orchestration for git-sync. // It delegates to internal/gitproto for protocol, internal/planner for // planning, and internal/auth for credentials. package syncer
import ( "bytes" "context" "crypto/tls" "encoding/json" "errors" "fmt" "io" "net/http" "net/url" "os" "os/exec" "path/filepath" "regexp" "runtime" "sort" "strconv" "strings" "sync" "time"
git "github.com/go-git/go-git/v5" "github.com/go-git/go-git/v5/plumbing" "github.com/go-git/go-git/v5/plumbing/format/packfile" "github.com/go-git/go-git/v5/plumbing/object" "github.com/go-git/go-git/v5/plumbing/protocol/packp" "github.com/go-git/go-git/v5/plumbing/protocol/packp/capability" "github.com/go-git/go-git/v5/plumbing/protocol/packp/sideband" "github.com/go-git/go-git/v5/plumbing/storer" "github.com/go-git/go-git/v5/plumbing/transport" transporthttp "github.com/go-git/go-git/v5/plumbing/transport/http" "github.com/go-git/go-git/v5/storage/memory" "github.com/go-git/go-git/v5/utils/ioutil" "github.com/zalando/go-keyring"
"github.com/soph/git-sync/internal/auth" "github.com/soph/git-sync/internal/gitproto" "github.com/soph/git-sync/internal/planner" bstrap "github.com/soph/git-sync/internal/strategy/bootstrap" "github.com/soph/git-sync/internal/strategy/incremental" "github.com/soph/git-sync/internal/strategy/materialized" )
const ( sourceRemoteName = "source" protocolModeAuto = "auto" protocolModeV1 = "v1" protocolModeV2 = "v2"
defaultAutoBatchMaxPackBytes = 512 * 1024 * 1024 entireCLIClientID = "entire-cli" githubLargeRepoThresholdKB = 1536 * 1024 )
var bodyLimitPattern = regexp.MustCompile(body exceeded size limit ([0-9]+))
var githubRepoAPIBaseURL = "https://api.github.com"
// Endpoint holds the connection configuration for a remote. type Endpoint struct { URL string Username string 2 unmodified lines
SkipTLSVerify bool }
type RefMapping struct { Source string Target string } // RefMapping is a user-specified source:target ref mapping. type RefMapping = planner.RefMapping
// Config holds all configuration for a sync operation. type Config struct { Source Endpoint Target Endpoint 11 unmodified lines
ProtocolMode string }
type RefKind string // Re-export types from planner for CLI compatibility. type ( RefKind = planner.RefKind Action = planner.Action BranchPlan = planner.BranchPlan )
const ( RefKindBranch RefKind = "branch" RefKindTag RefKind = "tag" RefKindBranch = planner.RefKindBranch RefKindTag = planner.RefKindTag ActionCreate = planner.ActionCreate ActionUpdate = planner.ActionUpdate ActionDelete = planner.ActionDelete ActionSkip = planner.ActionSkip ActionBlock = planner.ActionBlock )
type BranchPlan struct {
Branch string json:"branch"
SourceRef plumbing.ReferenceName json:"source_ref"
TargetRef plumbing.ReferenceName json:"target_ref"
SourceHash plumbing.Hash json:"source_hash"
TargetHash plumbing.Hash json:"target_hash"
Kind RefKind json:"kind"
Action Action json:"action"
Reason string json:"reason"
type RefInfo struct {
Name string json:"name"
Hash plumbing.Hash json:"hash"
}
type Action string
func (r RefInfo) MarshalJSON() ([]byte, error) {
type ri struct {
Name string json:"name"
Hash string json:"hash"
}
return json.Marshal(ri{Name: r.Name, Hash: r.Hash.String()})
}
const ( ActionCreate Action = "create" ActionUpdate Action = "update" ActionDelete Action = "delete" ActionSkip Action = "skip" ActionBlock Action = "block" )
// Result holds the outcome of a sync or bootstrap operation.
type Result struct {
Plans []BranchPlan json:"plans"
Pushed int json:"pushed"
14 unmodified lines
Protocol string json:"protocol"
}
func (r Result) Lines() []string { lines := make([]string, 0, len(r.Plans)+8) for _, plan := range r.Plans { lines = append(lines, planner.FormatPlanLine(plan)) } summary := fmt.Sprintf( "summary: pushed=%d deleted=%d skipped=%d blocked=%d protocol=%s relay=%t relay-mode=%s relay-reason=%s batching=%t batch-count=%d planned-batches=%d", r.Pushed, r.Deleted, r.Skipped, r.Blocked, r.Protocol, r.Relay, r.RelayMode, r.RelayReason, r.Batching, r.BatchCount, r.PlannedBatchCount, ) if r.DryRun { summary += " dry-run=true" } lines = append(lines, summary) lines = append(lines, statsLines(r.Stats)...) lines = append(lines, measurementLine(r.Measurement)...) if r.BootstrapSuggested { lines = append(lines, "hint: target refs are absent; bootstrap can seed them without local object storage") } if r.Batching && len(r.TempRefs) > 0 { lines = append(lines, fmt.Sprintf("batching: temp-refs=%s", strings.Join(r.TempRefs, ","))) } return lines }
// ProbeResult holds the outcome of a probe operation.
type ProbeResult struct {
SourceURL string json:"source_url"
TargetURL string json:"target_url,omitempty"
7 unmodified lines
Measurement Measurement json:"measurement"
}
type RefInfo struct {
Name string json:"name"
Hash plumbing.Hash json:"hash"
func (r ProbeResult) Lines() []string {
lines := []string{
fmt.Sprintf("source: %s", r.SourceURL),
fmt.Sprintf("requested-protocol: %s", r.RequestedMode),
fmt.Sprintf("negotiated-protocol: %s", r.Protocol),
}
if len(r.RefPrefixes) > 0 {
lines = append(lines, "ref-prefixes: "+strings.Join(r.RefPrefixes, ", "))
}
if len(r.Capabilities) > 0 {
lines = append(lines, "source-capabilities: "+strings.Join(r.Capabilities, ", "))
}
if r.TargetURL != "" {
lines = append(lines, "target: "+r.TargetURL)
}
if len(r.TargetCaps) > 0 {
lines = append(lines, "target-capabilities: "+strings.Join(r.TargetCaps, ", "))
}
lines = append(lines, fmt.Sprintf("refs: %d", len(r.Refs)))
for _, ref := range r.Refs {
lines = append(lines, fmt.Sprintf("ref: %s %s", ref.Hash.String(), ref.Name))
}
lines = append(lines, statsLines(r.Stats)...)
lines = append(lines, measurementLine(r.Measurement)...)
return lines
}
// FetchResult holds the outcome of a fetch operation.
type FetchResult struct {
SourceURL string json:"source_url"
RequestedMode string json:"requested_mode"
5 unmodified lines
Measurement Measurement json:"measurement"
}
type entireAuthHostInfo struct {
ActiveUser string json:"activeUser"
Users []string json:"users"
}
type oauthTokenResponse struct {
AccessToken string json:"access_token"
RefreshToken string json:"refresh_token"
ExpiresIn int64 json:"expires_in"
}
type Stats struct {
Enabled bool json:"enabled"
Items map[string]*ServiceStats json:"items"
}
type ServiceStats struct {
Name string json:"name"
Requests int json:"requests"
RequestBytes int64 json:"request_bytes"
ResponseBytes int64 json:"response_bytes"
Wants int json:"wants"
Haves int json:"haves"
Commands int json:"commands"
}
type Measurement struct {
Enabled bool json:"enabled"
ElapsedMillis int64 json:"elapsed_millis"
PeakAllocBytes uint64 json:"peak_alloc_bytes"
PeakHeapInuseBytes uint64 json:"peak_heap_inuse_bytes"
TotalAllocBytes uint64 json:"total_alloc_bytes"
GCCount uint32 json:"gc_count"
}
func (p BranchPlan) MarshalJSON() ([]byte, error) {
type branchPlanJSON struct {
Branch string json:"branch"
SourceRef string json:"source_ref"
TargetRef string json:"target_ref"
SourceHash string json:"source_hash"
TargetHash string json:"target_hash"
Kind RefKind json:"kind"
Action Action json:"action"
Reason string json:"reason"
}
return json.Marshal(branchPlanJSON{
Branch: p.Branch,
SourceRef: p.SourceRef.String(),
TargetRef: p.TargetRef.String(),
SourceHash: p.SourceHash.String(),
TargetHash: p.TargetHash.String(),
Kind: p.Kind,
Action: p.Action,
Reason: p.Reason,
})
}
func (r RefInfo) MarshalJSON() ([]byte, error) {
type refInfoJSON struct {
Name string json:"name"
Hash string json:"hash"
}
return json.Marshal(refInfoJSON{
Name: r.Name,
Hash: r.Hash.String(),
})
}
func (r FetchResult) MarshalJSON() ([]byte, error) {
type fetchResultJSON struct {
type fr struct {
SourceURL string json:"source_url"
RequestedMode string json:"requested_mode"
Protocol string json:"protocol"
4 unmodified lines
Measurement Measurement json:"measurement"
}
haves := make([]string, 0, len(r.Haves))
for _, hash := range r.Haves {
haves = append(haves, hash.String())
for _, h := range r.Haves {
haves = append(haves, h.String())
}
return json.Marshal(fetchResultJSON{
SourceURL: r.SourceURL,
RequestedMode: r.RequestedMode,
Protocol: r.Protocol,
Wants: r.Wants,
Haves: haves,
FetchedObjects: r.FetchedObjects,
Stats: r.Stats,
Measurement: r.Measurement,
return json.Marshal(fr{
SourceURL: r.SourceURL, RequestedMode: r.RequestedMode,
Protocol: r.Protocol, Wants: r.Wants, Haves: haves,
FetchedObjects: r.FetchedObjects, Stats: r.Stats, Measurement: r.Measurement,
})
}
func (r Result) Lines() []string { lines := make([]string, 0, len(r.Plans)+8) for _, plan := range r.Plans { label := plan.Branch if plan.TargetRef != "" { label = plan.TargetRef.String() } line := fmt.Sprintf("%s %s", strings.ToUpper(string(plan.Action)), label) if plan.Reason != "" { line += " - " + plan.Reason } lines = append(lines, line) }
summary := fmt.Sprintf( "summary: pushed=%d deleted=%d skipped=%d blocked=%d protocol=%s relay=%t relay-mode=%s relay-reason=%s batching=%t batch-count=%d planned-batches=%d", r.Pushed, r.Deleted, r.Skipped, r.Blocked, r.Protocol, r.Relay, r.RelayMode, r.RelayReason, r.Batching, r.BatchCount, r.PlannedBatchCount, ) if r.DryRun { summary += " dry-run=true" } lines = append(lines, summary)
if r.Stats.Enabled { keys := make([]string, 0, len(r.Stats.Items)) for key := range r.Stats.Items { keys = append(keys, key) } sort.Strings(keys) for _, key := range keys { item := r.Stats.Items[key] lines = append(lines, fmt.Sprintf( "stats: %s requests=%d request-bytes=%d response-bytes=%d wants=%d haves=%d commands=%d", item.Name, item.Requests, item.RequestBytes, item.ResponseBytes, item.Wants, item.Haves, item.Commands, )) } } if r.Measurement.Enabled { lines = append(lines, fmt.Sprintf( "measurement: elapsed-ms=%d peak-alloc-bytes=%d peak-heap-inuse-bytes=%d total-alloc-bytes=%d gc-count=%d", r.Measurement.ElapsedMillis, r.Measurement.PeakAllocBytes, r.Measurement.PeakHeapInuseBytes, r.Measurement.TotalAllocBytes, r.Measurement.GCCount, )) } if r.BootstrapSuggested { lines = append(lines, "hint: target refs are absent; bootstrap can seed them without local object storage") }
if r.Batching && len(r.TempRefs) > 0 { lines = append(lines, fmt.Sprintf("batching: temp-refs=%s", strings.Join(r.TempRefs, ","))) }
return lines }
func (r ProbeResult) Lines() []string { lines := []string{ fmt.Sprintf("source: %s", r.SourceURL), fmt.Sprintf("requested-protocol: %s", r.RequestedMode), fmt.Sprintf("negotiated-protocol: %s", r.Protocol), }
if len(r.RefPrefixes) > 0 { lines = append(lines, "ref-prefixes: "+strings.Join(r.RefPrefixes, ", ")) } if len(r.Capabilities) > 0 { lines = append(lines, "source-capabilities: "+strings.Join(r.Capabilities, ", ")) } if r.TargetURL != "" { lines = append(lines, "target: "+r.TargetURL) } if len(r.TargetCaps) > 0 { lines = append(lines, "target-capabilities: "+strings.Join(r.TargetCaps, ", ")) }
lines = append(lines, fmt.Sprintf("refs: %d", len(r.Refs))) for _, ref := range r.Refs { lines = append(lines, fmt.Sprintf("ref: %s %s", ref.Hash.String(), ref.Name)) }
return lines }
func (r FetchResult) Lines() []string { lines := []string{ fmt.Sprintf("source: %s", r.SourceURL), 3 unmodified lines
fmt.Sprintf("haves: %d", len(r.Haves)), fmt.Sprintf("fetched-objects: %d", r.FetchedObjects), } for _, want := range r.Wants { lines = append(lines, fmt.Sprintf("want: %s %s", want.Hash.String(), want.Name)) for _, w := range r.Wants { lines = append(lines, fmt.Sprintf("want: %s %s", w.Hash.String(), w.Name)) } for _, have := range r.Haves { lines = append(lines, fmt.Sprintf("have: %s", have.String())) for _, h := range r.Haves { lines = append(lines, fmt.Sprintf("have: %s", h.String())) } if r.Stats.Enabled { keys := make([]string, 0, len(r.Stats.Items)) for key := range r.Stats.Items { keys = append(keys, key) } sort.Strings(keys) for _, key := range keys { item := r.Stats.Items[key] lines = append(lines, fmt.Sprintf( "stats: %s requests=%d request-bytes=%d response-bytes=%d wants=%d haves=%d commands=%d", item.Name, item.Requests, item.RequestBytes, item.ResponseBytes, item.Wants, item.Haves, item.Commands, )) } lines = append(lines, statsLines(r.Stats)...) lines = append(lines, measurementLine(r.Measurement)...) return lines }
func statsLines(s Stats) []string { if !s.Enabled { return nil } if r.Measurement.Enabled { keys := make([]string, 0, len(s.Items)) for k := range s.Items { keys = append(keys, k) } sort.Strings(keys) var lines []string for _, k := range keys { item := s.Items[k] lines = append(lines, fmt.Sprintf( "measurement: elapsed-ms=%d peak-alloc-bytes=%d peak-heap-inuse-bytes=%d total-alloc-bytes=%d gc-count=%d", r.Measurement.ElapsedMillis, r.Measurement.PeakAllocBytes, r.Measurement.PeakHeapInuseBytes, r.Measurement.TotalAllocBytes, r.Measurement.GCCount, "stats: %s requests=%d request-bytes=%d response-bytes=%d wants=%d haves=%d commands=%d", item.Name, item.Requests, item.RequestBytes, item.ResponseBytes, item.Wants, item.Haves, item.Commands, )) } return lines }
func measurementLine(m Measurement) []string { if !m.Enabled { return nil } return []string{fmt.Sprintf( "measurement: elapsed-ms=%d peak-alloc-bytes=%d peak-heap-inuse-bytes=%d total-alloc-bytes=%d gc-count=%d", m.ElapsedMillis, m.PeakAllocBytes, m.PeakHeapInuseBytes, m.TotalAllocBytes, m.GCCount, )} }
// --- Session setup ---
func newConn(raw Endpoint, label string, stats *statsCollector) (*gitproto.Conn, error) { ep, err := transport.NewEndpoint(raw.URL) if err != nil { return nil, err } authEp := auth.Endpoint{ Username: raw.Username, Token: raw.Token, BearerToken: raw.BearerToken, SkipTLSVerify: raw.SkipTLSVerify, } authMethod, err := auth.Resolve(authEp, ep) if err != nil { return nil, err } baseRT := gitproto.NewHTTPTransport(raw.SkipTLSVerify) rt := &countingRoundTripper{base: baseRT, label: label, stats: stats} return gitproto.NewConn(ep, label, authMethod, rt), nil }
func planConfig(cfg Config) planner.PlanConfig { return planner.PlanConfig{ Branches: cfg.Branches, Mappings: cfg.Mappings, IncludeTags: cfg.IncludeTags, Force: cfg.Force, Prune: cfg.Prune, } }
// toGitprotoDesired converts planner DesiredRefs to gitproto DesiredRefs. func toGitprotoDesired(desired map[plumbing.ReferenceName]planner.DesiredRef) map[plumbing.ReferenceName]gitproto.DesiredRef { out := make(map[plumbing.ReferenceName]gitproto.DesiredRef, len(desired)) for k, v := range desired { out[k] = gitproto.DesiredRef{ SourceRef: v.SourceRef, TargetRef: v.TargetRef, SourceHash: v.SourceHash, IsTag: v.Kind == planner.RefKindTag, } } return out }
// --- Session setup (issue #12) ---
// syncSession holds the shared state for a sync operation, reducing // setup duplication across Run, Bootstrap, Probe, and Fetch. type syncSession struct { cfg Config stats *statsCollector sourceConn *gitproto.Conn targetConn *gitproto.Conn sourceService *gitproto.RefService targetAdv *packp.AdvRefs sourceRefMap map[plumbing.ReferenceName]plumbing.Hash targetRefMap map[plumbing.ReferenceName]plumbing.Hash measurementDone func() Measurement }
// newSession performs the shared setup: protocol validation, mapping validation, // connection creation, and ref discovery. func newSession(ctx context.Context, cfg Config, needTarget bool) (*syncSession, error) { if err := validateProtocol(&cfg); err != nil { return nil, err } if _, err := planner.ValidateMappings(cfg.Mappings); err != nil { return nil, err }
s := &syncSession{ cfg: cfg, stats: newStats(cfg.ShowStats), measurementDone: startMeasurement(cfg.MeasureMemory), }
var err error s.sourceConn, err = newConn(cfg.Source, "source", s.stats) if err != nil { return nil, fmt.Errorf("create source transport: %w", err) }
refPrefixes := planner.RefPrefixes(cfg.Mappings, cfg.IncludeTags) sourceRefs, sourceService, err := gitproto.ListSourceRefs(ctx, s.sourceConn, cfg.ProtocolMode, refPrefixes) if err != nil { return nil, fmt.Errorf("list source refs: %w", err) } s.sourceService = sourceService s.sourceRefMap = gitproto.RefHashMap(sourceRefs)
if needTarget { s.targetConn, err = newConn(cfg.Target, "target", s.stats) if err != nil { return nil, fmt.Errorf("create target transport: %w", err) } s.targetAdv, err = gitproto.AdvertisedRefsV1(ctx, s.targetConn, transport.ReceivePackServiceName) if err != nil { return nil, fmt.Errorf("list target refs: %w", err) } targetRefSlice, err := gitproto.AdvRefsToSlice(s.targetAdv) if err != nil { return nil, fmt.Errorf("decode target refs: %w", err) } s.targetRefMap = gitproto.RefHashMap(targetRefSlice) }
return s, nil }
// --- Public API ---
// Run executes a sync or plan operation. func Run(ctx context.Context, cfg Config) (Result, error) { measurementDone := startMeasurement(cfg.MeasureMemory) if cfg.ProtocolMode == "" { cfg.ProtocolMode = protocolModeAuto } if cfg.ProtocolMode != protocolModeAuto && cfg.ProtocolMode != protocolModeV1 && cfg.ProtocolMode != protocolModeV2 { return Result{}, fmt.Errorf("unsupported protocol mode %q", cfg.ProtocolMode) }
repo, err := git.Init(memory.NewStorage(), nil) s, err := newSession(ctx, cfg, true) if err != nil { return Result{}, fmt.Errorf("init in-memory repository: %w", err) return Result{}, err } measurementDone := s.measurementDone stats := s.stats sourceConn := s.sourceConn targetConn := s.targetConn sourceService := s.sourceService targetAdv := s.targetAdv sourceRefMap := s.sourceRefMap targetRefMap := s.targetRefMap
stats := newStats(cfg.ShowStats) sourceConn, err := newTransportConn(cfg.Source, "source", stats) if err != nil { return Result{}, fmt.Errorf("create source transport: %w", err) } targetConn, err := newTransportConn(cfg.Target, "target", stats) if err != nil { return Result{}, fmt.Errorf("create target transport: %w", err) }
sourceRefs, sourceService, err := listSourceRefs(ctx, sourceConn, cfg) if err != nil { return Result{}, fmt.Errorf("list source refs: %w", err) } targetAdv, err := advertisedRefsV1(ctx, targetConn, transport.ReceivePackServiceName) if err != nil { return Result{}, fmt.Errorf("list target refs: %w", err) } targetRefs, err := advertisedReferences(targetAdv) if err != nil { return Result{}, fmt.Errorf("decode target refs: %w", err) }
sourceRefMap := refHashMap(sourceRefs) targetRefMap := refHashMap(targetRefs)
desiredRefs, managedTargets, err := buildDesiredRefs(sourceRefMap, cfg) desiredRefs, managedTargets, err := planner.BuildDesiredRefs(sourceRefMap, planConfig(cfg)) if err != nil { return Result{}, err } if len(desiredRefs) == 0 { return Result{}, fmt.Errorf("no source refs matched") } if ok, reason := canBootstrapRelay(cfg, desiredRefs, targetRefMap); ok {
// Check for bootstrap opportunity (before allocating in-memory repo) if ok, reason := planner.CanBootstrapRelay(cfg.Force, cfg.Prune, desiredRefs, targetRefMap); ok { if cfg.DryRun { plans, err := buildBootstrapPlans(desiredRefs, targetRefMap) plans, err := planner.BuildBootstrapPlans(desiredRefs, targetRefMap) if err != nil { return Result{}, err } return Result{ Plans: plans, DryRun: true, Relay: false, RelayMode: "", RelayReason: reason, BootstrapSuggested: true, Stats: stats.snapshot(), Measurement: measurementDone(), Protocol: sourceService.protocol, Plans: plans, DryRun: true, RelayReason: reason, BootstrapSuggested: true, Stats: stats.snapshot(), Measurement: measurementDone(), Protocol: sourceService.Protocol, }, nil } return bootstrapWithInputs(ctx, cfg, stats, sourceConn, targetConn, sourceService, targetAdv, desiredRefs, targetRefMap, reason) return bootstrapWithInputs(ctx, cfg, stats, sourceConn, targetConn, sourceService, targetAdv, desiredRefs, targetRefMap, reason, measurementDone) }
if err := sourceService.Fetch(ctx, repo, sourceConn, desiredRefs, targetRefMap); err != nil { // Normal sync: allocate in-memory repo and fetch objects repo, err := git.Init(memory.NewStorage(), nil) if err != nil { return Result{}, fmt.Errorf("init in-memory repository: %w", err) } gpDesired := toGitprotoDesired(desiredRefs) if err := sourceService.FetchToStore(ctx, repo.Storer, sourceConn, gpDesired, targetRefMap); err != nil { if !errors.Is(err, git.NoErrAlreadyUpToDate) { return Result{}, err } }
plans, err := buildPlans(repo, desiredRefs, targetRefMap, managedTargets, cfg) plans, err := planner.BuildPlans(repo.Storer, desiredRefs, targetRefMap, managedTargets, planConfig(cfg)) if err != nil { return Result{}, err }
result := Result{ Plans: plans, DryRun: cfg.DryRun, Relay: false, RelayMode: "", RelayReason: "", Stats: stats.snapshot(), Measurement: measurementDone(), Protocol: sourceService.protocol, Plans: plans, DryRun: cfg.DryRun, Protocol: sourceService.Protocol, Stats: stats.snapshot(), Measurement: measurementDone(), }
pushPlans := make([]BranchPlan, 0, len(plans)) for _, plan := range plans { switch plan.Action { case ActionCreate, ActionUpdate: if cfg.DryRun { result.Skipped++ continue } pushPlans = append(pushPlans, plan) case ActionDelete: case ActionCreate, ActionUpdate, ActionDelete: if cfg.DryRun { result.Skipped++ continue 9 unmodified lines
if !cfg.DryRun && result.Blocked > 0 { return result, fmt.Errorf("blocked %d ref update(s); rerun with --force where appropriate", result.Blocked) } result.RelayReason = relayFallbackReason(cfg, pushPlans, targetAdv) result.RelayReason = planner.RelayFallbackReason(cfg.Force, cfg.Prune, cfg.DryRun, pushPlans, targetAdv)
if !cfg.DryRun { if ok, reason := canIncrementalRelay(cfg, pushPlans, targetAdv); ok { relayPlans := append([]BranchPlan(nil), pushPlans...) desiredRelay := desiredSubsetForPlans(desiredRefs, relayPlans) packReader, err := sourceService.FetchPack(ctx, sourceConn, desiredRelay, targetRefMap) if err != nil { return result, fmt.Errorf("fetch source pack: %w", err) } defer packReader.Close() packReader = limitPackReadCloser(packReader, cfg.MaxPackBytes) if err := pushPackToTarget(ctx, targetConn, targetAdv, relayPlans, packReader, cfg.Verbose); err != nil { return result, fmt.Errorf("push target refs: %w", err) } result.Relay = true result.RelayMode = "incremental" result.RelayReason = reason } else if ok, reason := canFullTagCreateRelay(pushPlans); ok { relayPlans := append([]BranchPlan(nil), pushPlans...) desiredRelay := desiredSubsetForPlans(desiredRefs, relayPlans) packReader, err := sourceService.FetchPack(ctx, sourceConn, desiredRelay, nil) if err != nil { return result, fmt.Errorf("fetch source tag pack: %w", err) } defer packReader.Close() packReader = limitPackReadCloser(packReader, cfg.MaxPackBytes) if err := pushPackToTarget(ctx, targetConn, targetAdv, relayPlans, packReader, cfg.Verbose); err != nil { return result, fmt.Errorf("push target refs: %w", err) } result.Relay = true result.RelayMode = "incremental" result.RelayReason = reason // Try incremental relay first incResult, err := incremental.Execute(ctx, incremental.Params{ SourceConn: sourceConn, TargetConn: targetConn, SourceService: sourceService, TargetAdv: targetAdv, DesiredRefs: desiredRefs, TargetRefs: targetRefMap, PushPlans: pushPlans, MaxPackBytes: cfg.MaxPackBytes, Verbose: cfg.Verbose, }, planConfig(cfg)) if err != nil { return result, err } if incResult.Relay { result.Relay = incResult.Relay result.RelayMode = incResult.RelayMode result.RelayReason = incResult.RelayReason } else if len(pushPlans) > 0 { if err := ensureLocalObjectsForPush(ctx, repo, sourceConn, sourceService, desiredRefs, pushPlans); err != nil { return result, fmt.Errorf("prepare local objects for push: %w", err) } if err := pushToTarget(ctx, repo, targetConn, targetAdv, pushPlans, targetRefMap, cfg.Verbose); err != nil { return result, fmt.Errorf("push target refs: %w", err) // Materialized fallback if err := materialized.Execute(ctx, materialized.Params{ Store: repo.Storer, SourceConn: sourceConn, SourceService: sourceService, TargetConn: targetConn, TargetAdv: targetAdv, DesiredRefs: desiredRefs, TargetRefs: targetRefMap, PushPlans: pushPlans, Verbose: cfg.Verbose, }); err != nil { return result, err } } } 6 unmodified lines
result.Deleted++ } }
result.Stats = stats.snapshot() result.Measurement = measurementDone() return result, nil }
// Bootstrap seeds an empty target with relay behavior. func Bootstrap(ctx context.Context, cfg Config) (Result, error) { measurementDone := startMeasurement(cfg.MeasureMemory) if cfg.ProtocolMode == "" { cfg.ProtocolMode = protocolModeAuto } if cfg.ProtocolMode != protocolModeAuto && cfg.ProtocolMode != protocolModeV1 && cfg.ProtocolMode != protocolModeV2 { return Result{}, fmt.Errorf("unsupported protocol mode %q", cfg.ProtocolMode) } if cfg.Force { return Result{}, fmt.Errorf("bootstrap does not support --force") } 4 unmodified lines
return Result{}, fmt.Errorf("bootstrap does not support dry-run; use plan or sync") }
stats := newStats(cfg.ShowStats) sourceConn, err := newTransportConn(cfg.Source, "source", stats) s, err := newSession(ctx, cfg, true) if err != nil { return Result{}, fmt.Errorf("create source transport: %w", err) return Result{}, err } targetConn, err := newTransportConn(cfg.Target, "target", stats) if err != nil { return Result{}, fmt.Errorf("create target transport: %w", err) }
sourceRefMap := refHashMap(sourceRefs) targetRefMap := refHashMap(targetRefs)
desiredRefs, _, err := buildDesiredRefs(sourceRefMap, cfg) desiredRefs, _, err := planner.BuildDesiredRefs(s.sourceRefMap, planConfig(cfg)) if err != nil { return Result{}, err } if len(desiredRefs) == 0 { return Result{}, fmt.Errorf("no source refs matched") } _, reason := canBootstrapRelay(cfg, desiredRefs, targetRefMap) result, err := bootstrapWithInputs(ctx, cfg, stats, sourceConn, targetConn, sourceService, targetAdv, desiredRefs, targetRefMap, reason) result.Measurement = measurementDone()
_, reason := planner.CanBootstrapRelay(cfg.Force, cfg.Prune, desiredRefs, s.targetRefMap) result, err := bootstrapWithInputs(ctx, cfg, s.stats, s.sourceConn, s.targetConn, s.sourceService, s.targetAdv, desiredRefs, s.targetRefMap, reason, s.measurementDone) result.Measurement = s.measurementDone() return result, err }
// Probe inspects source and optionally target remotes. func Probe(ctx context.Context, cfg Config) (ProbeResult, error) { measurementDone := startMeasurement(cfg.MeasureMemory) if cfg.ProtocolMode == "" { cfg.ProtocolMode = protocolModeAuto } if cfg.ProtocolMode != protocolModeAuto && cfg.ProtocolMode != protocolModeV1 && cfg.ProtocolMode != protocolModeV2 { return ProbeResult{}, fmt.Errorf("unsupported protocol mode %q", cfg.ProtocolMode) } if cfg.Source.URL == "" { return ProbeResult{}, fmt.Errorf("source repository URL is required") }
stats := newStats(cfg.ShowStats) sourceConn, err := newTransportConn(cfg.Source, "source", stats) s, err := newSession(ctx, cfg, cfg.Target.URL != "") if err != nil { return ProbeResult{}, fmt.Errorf("create source transport: %w", err) return ProbeResult{}, err }
refs, service, err := listSourceRefs(ctx, sourceConn, cfg) if err != nil { return ProbeResult{}, fmt.Errorf("list source refs: %w", err) refInfos := make([]RefInfo, 0, len(s.sourceRefMap)) for name, hash := range s.sourceRefMap { refInfos = append(refInfos, RefInfo{Name: name.String(), Hash: hash}) } sort.Slice(refInfos, func(i, j int) bool { return refInfos[i].Name < refInfos[j].Name })
refInfos := make([]RefInfo, 0, len(refs)) for _, ref := range refs { if ref.Type() != plumbing.HashReference { continue } refInfos = append(refInfos, RefInfo{ Name: ref.Name().String(), Hash: ref.Hash(), }) } sort.Slice(refInfos, func(i, j int) bool { return refInfos[i].Name < refInfos[j].Name })
result := ProbeResult{ SourceURL: cfg.Source.URL, RequestedMode: cfg.ProtocolMode, Protocol: service.protocol, RefPrefixes: sourceRefPrefixes(cfg), Capabilities: sourceCapabilities(service), Protocol: s.sourceService.Protocol, RefPrefixes: planner.RefPrefixes(cfg.Mappings, cfg.IncludeTags), Capabilities: s.sourceService.Capabilities(), Refs: refInfos, Stats: stats.snapshot(), Measurement: measurementDone(), Stats: s.stats.snapshot(), Measurement: s.measurementDone(), }
if cfg.Target.URL != "" { targetConn, err := newTransportConn(cfg.Target, "target", stats) if err != nil { return ProbeResult{}, fmt.Errorf("create target transport: %w", err) } targetAdv, err := advertisedRefsV1(ctx, targetConn, transport.ReceivePackServiceName) if err != nil { return ProbeResult{}, fmt.Errorf("list target refs: %w", err) } result.TargetURL = cfg.Target.URL result.TargetCaps = advCapabilities(targetAdv) result.Stats = stats.snapshot() result.Measurement = measurementDone() result.TargetCaps = gitproto.AdvRefsCaps(s.targetAdv) result.Stats = s.stats.snapshot() result.Measurement = s.measurementDone() }
return result, nil }
// Fetch exercises source-side fetch negotiation. func Fetch(ctx context.Context, cfg Config, haveRefs []string, haveHashes []plumbing.Hash) (FetchResult, error) { measurementDone := startMeasurement(cfg.MeasureMemory) if cfg.ProtocolMode == "" { cfg.ProtocolMode = protocolModeAuto } if cfg.ProtocolMode != protocolModeAuto && cfg.ProtocolMode != protocolModeV1 && cfg.ProtocolMode != protocolModeV2 { return FetchResult{}, fmt.Errorf("unsupported protocol mode %q", cfg.ProtocolMode) } if cfg.Source.URL == "" { return FetchResult{}, fmt.Errorf("source repository URL is required") }
s, err := newSession(ctx, cfg, false) if err != nil { return FetchResult{}, err }
repo, err := git.Init(memory.NewStorage(), nil) if err != nil { return FetchResult{}, fmt.Errorf("init in-memory repository: %w", err) } sourceRefMap := s.sourceRefMap
stats := newStats(cfg.ShowStats) sourceConn, err := newTransportConn(cfg.Source, "source", stats) if err != nil { return FetchResult{}, fmt.Errorf("create source transport: %w", err) }
sourceRefs, sourceService, err := listSourceRefs(ctx, sourceConn, cfg) if err != nil { return FetchResult{}, fmt.Errorf("list source refs: %w", err) } sourceRefMap := refHashMap(sourceRefs)
desiredRefs, _, err := buildDesiredRefs(sourceRefMap, cfg) desiredRefs, _, err := planner.BuildDesiredRefs(sourceRefMap, planConfig(cfg)) if err != nil { return FetchResult{}, err } 14 unmodified lines
targetRefMap[plumbing.ReferenceName(fmt.Sprintf("refs/haves/%d", idx))] = hash }
if err := sourceService.Fetch(ctx, repo, sourceConn, desiredRefs, targetRefMap); err != nil { gpDesired := toGitprotoDesired(desiredRefs) if err := s.sourceService.FetchToStore(ctx, repo.Storer, s.sourceConn, gpDesired, targetRefMap); err != nil { if !errors.Is(err, git.NoErrAlreadyUpToDate) { return FetchResult{}, err } 10 unmodified lines
return FetchResult{}, fmt.Errorf("count fetched objects: %w", err) }
haveValues := make([]plumbing.Hash, 0, len(targetRefMap)) for _, h := range targetRefMap { if !h.IsZero() { haveValues = append(haveValues, h) } }
return FetchResult{ SourceURL: cfg.Source.URL, RequestedMode: cfg.ProtocolMode, Protocol: sourceService.protocol, Protocol: s.sourceService.Protocol, Wants: wants, Haves: sortedUniqueHashes(mapsRefValues(targetRefMap)), Haves: gitproto.SortedUniqueHashes(haveValues), FetchedObjects: objectCount, Stats: stats.snapshot(), Measurement: measurementDone(), Stats: s.stats.snapshot(), Measurement: s.measurementDone(), }, nil }
func buildBootstrapPlans( desired map[plumbing.ReferenceName]desiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash, ) ([]BranchPlan, error) { targetNames := make([]plumbing.ReferenceName, 0, len(desired)) for _, want := range desired { targetNames = append(targetNames, want.TargetRef) } sort.Slice(targetNames, func(i, j int) bool { return targetNames[i] < targetNames[j] })
func canBootstrapRelay( cfg Config, desired map[plumbing.ReferenceName]desiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash, ) (bool, string) { if cfg.Force || cfg.Prune { return false, "bootstrap-disabled-by-force-or-prune" } if len(desired) == 0 { return false, "bootstrap-no-managed-refs" } for targetRef := range desired { if !targetRefs[targetRef].IsZero() { return false, "bootstrap-target-ref-exists" } } return true, "empty-target-managed-refs" }
func canIncrementalRelay(cfg Config, plans []BranchPlan, targetAdv *packp.AdvRefs) (bool, string) { if cfg.Force || cfg.Prune || cfg.DryRun { return false, "incremental-disabled-by-force-prune-or-dry-run" } if len(plans) == 0 { return false, "incremental-no-plans" } if targetAdv == nil || targetAdv.Capabilities == nil { return false, "incremental-missing-target-capabilities" } if targetAdv.Capabilities.Supports(capability.Capability("no-thin")) { return false, "incremental-target-no-thin" }
func relayFallbackReason(cfg Config, plans []BranchPlan, targetAdv *packp.AdvRefs) string { if ok, reason := canIncrementalRelay(cfg, plans, targetAdv); ok { return reason } else if ok, reason := canFullTagCreateRelay(plans); ok { return reason } else { return reason } }
func canFullTagCreateRelay(plans []BranchPlan) (bool, string) { if len(plans) == 0 { return false, "incremental-no-plans" } for _, plan := range plans { if plan.Kind != RefKindTag { return false, "incremental-tag-relay-non-tag-plan" } if !plan.SourceRef.IsTag() || !plan.TargetRef.IsTag() { return false, "incremental-tag-relay-non-tag-mapping" } if plan.Action != ActionCreate { return false, "incremental-tag-relay-tag-action-not-create" } } return true, "tag-create-full-pack" }
func desiredSubsetForPlans( desired map[plumbing.ReferenceName]desiredRef, plans []BranchPlan, ) map[plumbing.ReferenceName]desiredRef { out := make(map[plumbing.ReferenceName]desiredRef, len(plans)) for _, plan := range plans { if ref, ok := desired[plan.TargetRef]; ok { out[plan.TargetRef] = ref } } return out }
func ensureLocalObjectsForPush( ctx context.Context, repo *git.Repository, sourceConn *transportConn, sourceService *sourceRefService, desired map[plumbing.ReferenceName]desiredRef, plans []BranchPlan, ) error { tagDesired := make(map[plumbing.ReferenceName]desiredRef) for _, plan := range plans { if plan.Kind != RefKindTag { continue } if desiredRef, ok := desired[plan.TargetRef]; ok { tagDesired[plan.TargetRef] = desiredRef } } if len(tagDesired) == 0 { return nil } return sourceService.Fetch(ctx, repo, sourceConn, tagDesired, nil) } // --- Bootstrap implementation ---
func bootstrapWithInputs( ctx context.Context, cfg Config, stats *statsCollector, sourceConn *transportConn, targetConn *transportConn, sourceService *sourceRefService, sourceConn, targetConn *gitproto.Conn, sourceService *gitproto.RefService, targetAdv *packp.AdvRefs, desiredRefs map[plumbing.ReferenceName]desiredRef, desiredRefs map[plumbing.ReferenceName]planner.DesiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash, relayReason string, measurementDone func() Measurement, ) (Result, error) { plans, err := buildBootstrapPlans(desiredRefs, targetRefs) bResult, err := bstrap.Execute(ctx, bstrap.Params{ SourceConn: sourceConn, TargetConn: targetConn, SourceService: sourceService, TargetAdv: targetAdv, DesiredRefs: desiredRefs, TargetRefs: targetRefs, MaxPackBytes: cfg.MaxPackBytes, BatchMaxPack: cfg.BatchMaxPackBytes, Verbose: cfg.Verbose, }, relayReason) if err != nil { return Result{}, err }
result := Result{ Plans: plans, Relay: true, RelayMode: "bootstrap", RelayReason: relayReason, Stats: stats.snapshot(), Protocol: sourceService.protocol, }
if batchLimit, ok := githubBootstrapBatchMaxPackBytes(ctx, cfg, sourceConn, sourceService); ok { cfg.BatchMaxPackBytes = batchLimit progressf( cfg.Verbose, "bootstrap: github repo-size preflight selected batched mode with batch-max-pack-bytes=%d", cfg.BatchMaxPackBytes, ) }
if cfg.BatchMaxPackBytes > 0 { return bootstrapBatchedWithInputs(ctx, cfg, stats, sourceConn, targetConn, sourceService, targetAdv, plans, desiredRefs, targetRefs, result) }
progressf(cfg.Verbose, "bootstrap: fetching %d ref(s) from source", len(plans))
packReader, err := sourceService.FetchPack(ctx, sourceConn, desiredRefs, nil) if err != nil { if errors.Is(err, git.NoErrAlreadyUpToDate) { return result, nil } return result, fmt.Errorf("fetch source pack: %w", err) } packReader = limitPackReadCloser(packReader, cfg.MaxPackBytes)
progressf(cfg.Verbose, "bootstrap: pushing %d ref(s) to target", len(plans)) pushErr := pushPackToTarget(ctx, targetConn, targetAdv, plans, packReader, cfg.Verbose) if closeErr := packReader.Close(); closeErr != nil && pushErr == nil { pushErr = closeErr } if pushErr != nil { autoBatchSize, ok := autoBatchMaxPackBytes(cfg, sourceService, pushErr) if !ok { return result, fmt.Errorf("push target refs: %w", pushErr) } progressf( cfg.Verbose, "bootstrap: target rejected single-pack push; retrying with batch-max-pack-bytes=%d", autoBatchSize, ) cfg.BatchMaxPackBytes = autoBatchSize return bootstrapBatchedWithInputs(ctx, cfg, stats, sourceConn, targetConn, sourceService, targetAdv, plans, desiredRefs, targetRefs, result) }
result.Pushed = len(plans) result.Stats = stats.snapshot() return result, nil return Result{ Plans: bResult.Plans, Pushed: bResult.Pushed, Relay: bResult.Relay, RelayMode: bResult.RelayMode, RelayReason: bResult.RelayReason, Batching: bResult.Batching, BatchCount: bResult.BatchCount, PlannedBatchCount: bResult.PlannedBatchCount, TempRefs: bResult.TempRefs, Stats: stats.snapshot(), Measurement: measurementDone(), Protocol: sourceService.Protocol, }, nil }
func autoBatchMaxPackBytes(cfg Config, sourceService *sourceRefService, err error) (int64, bool) { if cfg.BatchMaxPackBytes > 0 || !isTargetBodyLimitError(err) { return 0, false } if sourceService == nil || sourceService.protocol != protocolModeV2 || !fetchCapabilitySupports(sourceService.v2, "filter") { return 0, false } // --- Helpers ---
batchLimit := int64(defaultAutoBatchMaxPackBytes) if targetLimit := targetBodyLimit(err); targetLimit > 0 { derivedLimit := targetLimit / 2 if derivedLimit <= 0 { derivedLimit = targetLimit } if derivedLimit < batchLimit { batchLimit = derivedLimit } func validateProtocol(cfg *Config) error { if cfg.ProtocolMode == "" { cfg.ProtocolMode = protocolModeAuto } if cfg.MaxPackBytes > 0 && cfg.MaxPackBytes < batchLimit { batchLimit = cfg.MaxPackBytes switch cfg.ProtocolMode { case protocolModeAuto, protocolModeV1, protocolModeV2: return nil default: return fmt.Errorf("unsupported protocol mode %q", cfg.ProtocolMode) } if batchLimit <= 0 { return 0, false } return batchLimit, true }
func githubBootstrapBatchMaxPackBytes(ctx context.Context, cfg Config, sourceConn *transportConn, sourceService *sourceRefService) (int64, bool) { if cfg.BatchMaxPackBytes > 0 { return 0, false func parseHaveRef(raw string) plumbing.ReferenceName { raw = strings.TrimSpace(raw) if strings.HasPrefix(raw, "refs/") { return plumbing.ReferenceName(raw) } if sourceConn == nil || sourceConn.endpoint == nil { return 0, false } if sourceService == nil || sourceService.protocol != protocolModeV2 || !fetchCapabilitySupports(sourceService.v2, "filter") { return 0, false } repoSizeKB, ok := lookupGitHubRepoSizeKB(ctx, sourceConn) if !ok || repoSizeKB < githubLargeRepoThresholdKB { return 0, false }
batchLimit := int64(defaultAutoBatchMaxPackBytes) if cfg.MaxPackBytes > 0 && cfg.MaxPackBytes < batchLimit { batchLimit = cfg.MaxPackBytes } if batchLimit <= 0 { return 0, false } return batchLimit, true }
func lookupGitHubRepoSizeKB(ctx context.Context, sourceConn *transportConn) (int64, bool) { owner, repo, ok := githubOwnerRepo(sourceConn) if !ok { return 0, false }
apiURL := strings.TrimRight(githubRepoAPIBaseURL, "/") + "/repos/" + owner + "/" + repo req, err := http.NewRequestWithContext(ctx, http.MethodGet, apiURL, nil) if err != nil { return 0, false } req.Header.Set("Accept", "application/vnd.github+json") req.Header.Set("X-GitHub-Api-Version", "2022-11-28") req.Header.Set("User-Agent", capability.DefaultAgent()) req.Header.Set(statsPhaseHdr, "github repo metadata")
resp, err := sourceConn.http.Do(req) if err != nil { return 0, false } defer resp.Body.Close() if resp.StatusCode != http.StatusOK { return 0, false }
var payload struct {
Size int64 json:"size"
}
if err := json.NewDecoder(resp.Body).Decode(&payload); err != nil {
return 0, false
}
if payload.Size <= 0 {
return 0, false
}
return payload.Size, true
}
func githubOwnerRepo(sourceConn *transportConn) (string, string, bool) { if sourceConn == nil || sourceConn.endpoint == nil { return "", "", false } ep := sourceConn.endpoint if ep.Protocol != "http" && ep.Protocol != "https" { return "", "", false } if !strings.EqualFold(ep.Host, "github.com") { return "", "", false }
path := strings.Trim(ep.Path, "/") if strings.HasSuffix(path, ".git") { path = strings.TrimSuffix(path, ".git") } parts := strings.Split(path, "/") if len(parts) != 2 || parts[0] == "" || parts[1] == "" { return "", "", false } return parts[0], parts[1], true }
func isTargetBodyLimitError(err error) bool { if err == nil { return false } message := strings.ToLower(err.Error()) return strings.Contains(message, "body exceeded size limit") || (strings.Contains(message, "request body") && strings.Contains(message, "too large")) || (strings.Contains(message, "payload") && strings.Contains(message, "too large")) || strings.Contains(message, "http 413") }
type bootstrapBatch struct { Plan BranchPlan TempRef plumbing.ReferenceName ResumeHash plumbing.Hash Checkpoints []plumbing.Hash }
func bootstrapBatchedWithInputs( ctx context.Context, cfg Config, stats *statsCollector, sourceConn *transportConn, targetConn *transportConn, sourceService *sourceRefService, targetAdv *packp.AdvRefs, plans []BranchPlan, desiredRefs map[plumbing.ReferenceName]desiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash, result Result, ) (Result, error) { if sourceService.protocol != protocolModeV2 { return result, fmt.Errorf("bootstrap batching currently requires protocol v2") } if !fetchCapabilitySupports(sourceService.v2, "filter") { return result, fmt.Errorf("bootstrap batching requires source fetch filter support") }
planRefs := make([]desiredRef, 0, len(plans)) tagPlans := make([]BranchPlan, 0, len(plans)) tagDesired := make(map[plumbing.ReferenceName]desiredRef) for _, plan := range plans { if plan.Kind == RefKindTag { tagPlans = append(tagPlans, plan) if desired, ok := desiredRefs[plan.TargetRef]; ok { tagDesired[plan.TargetRef] = desired } continue } if !plan.SourceRef.IsBranch() || !plan.TargetRef.IsBranch() { return result, fmt.Errorf("bootstrap batching currently supports branch refs and create-only tags") } planRefs = append(planRefs, desiredRef{ Kind: plan.Kind, Label: plan.Branch, SourceRef: plan.SourceRef, TargetRef: plan.TargetRef, SourceHash: plan.SourceHash, }) }
var ( batches []bootstrapBatch err error ) if len(planRefs) > 0 { progressf(cfg.Verbose, "bootstrap-batch: planning checkpoints for %d branch ref(s)", len(planRefs)) batches, err = planBootstrapBatches(ctx, cfg, sourceConn, sourceService, planRefs, targetRefs) if err != nil { return result, err } }
batchLimit := cfg.BatchMaxPackBytes if cfg.MaxPackBytes > 0 && (batchLimit == 0 || cfg.MaxPackBytes < batchLimit) { batchLimit = cfg.MaxPackBytes }
for _, batch := range batches { result.PlannedBatchCount += len(batch.Checkpoints) result.TempRefs = append(result.TempRefs, batch.TempRef.String()) progressf( cfg.Verbose, "bootstrap-batch: branch=%s temp-ref=%s planned-batches=%d resume=%s", batch.Plan.TargetRef, batch.TempRef, len(batch.Checkpoints), shortHash(batch.ResumeHash), ) current := batch.ResumeHash startIdx, err := bootstrapResumeIndex(batch.Checkpoints, batch.ResumeHash) if err != nil { return result, fmt.Errorf("resume bootstrap batch for %s: %w", batch.Plan.TargetRef, err) } for idx := startIdx; idx < len(batch.Checkpoints); idx++ { checkpoint := batch.Checkpoints[idx] progressf( cfg.Verbose, "bootstrap-batch: branch=%s batch=%d/%d from=%s to=%s", batch.Plan.TargetRef, idx+1, len(batch.Checkpoints), shortHash(current), shortHash(checkpoint), ) stagePlans := []BranchPlan{ { Branch: batch.Plan.Branch, SourceRef: batch.Plan.SourceRef, TargetRef: batch.TempRef, SourceHash: checkpoint, TargetHash: current, Kind: batch.Plan.Kind, Action: actionForTargetHash(current), Reason: fmt.Sprintf("%s -> %s via %s", shortHash(current), shortHash(checkpoint), batch.TempRef), }, } if idx == len(batch.Checkpoints)-1 { stagePlans = append(stagePlans, BranchPlan{ Branch: batch.Plan.Branch, SourceRef: batch.Plan.SourceRef, TargetRef: batch.Plan.TargetRef, SourceHash: checkpoint, TargetHash: plumbing.ZeroHash, Kind: batch.Plan.Kind, Action: ActionCreate, Reason: fmt.Sprintf("create %s at %s", batch.Plan.TargetRef, shortHash(checkpoint)), }) }
packReader, err := sourceService.FetchPack(ctx, sourceConn, singleDesiredRef(batch.Plan.SourceRef, batch.TempRef, checkpoint), singleHaveMap(current)) if err != nil { return result, fmt.Errorf("fetch source batch pack for %s: %w", batch.Plan.TargetRef, err) } packReader = limitPackReadCloser(packReader, batchLimit) if err := pushPackToTarget(ctx, targetConn, targetAdv, stagePlans, packReader, cfg.Verbose); err != nil { return result, fmt.Errorf("push bootstrap batch for %s: %w", batch.Plan.TargetRef, err) } progressf( cfg.Verbose, "bootstrap-batch: branch=%s batch=%d/%d complete", batch.Plan.TargetRef, idx+1, len(batch.Checkpoints), ) current = checkpoint result.BatchCount++ }
if current.IsZero() { return result, fmt.Errorf("bootstrap batching for %s completed with no checkpoint state", batch.Plan.TargetRef) } if batch.ResumeHash == batch.Plan.SourceHash { if err := pushCommandsToTarget(ctx, targetConn, targetAdv, []BranchPlan{{ Branch: batch.Plan.Branch, SourceRef: batch.Plan.SourceRef, TargetRef: batch.Plan.TargetRef, SourceHash: batch.Plan.SourceHash, TargetHash: plumbing.ZeroHash, Kind: batch.Plan.Kind, Action: ActionCreate, Reason: fmt.Sprintf("create %s at %s", batch.Plan.TargetRef, shortHash(batch.Plan.SourceHash)), }}, cfg.Verbose); err != nil { return result, fmt.Errorf("resume bootstrap cutover for %s: %w", batch.Plan.TargetRef, err) } }
deleteTempPlan := BranchPlan{ Branch: batch.Plan.Branch, TargetRef: batch.TempRef, SourceHash: plumbing.ZeroHash, TargetHash: current, Kind: batch.Plan.Kind, Action: ActionDelete, Reason: fmt.Sprintf("delete temp ref %s", batch.TempRef), } if err := pushCommandsToTarget(ctx, targetConn, targetAdv, []BranchPlan{deleteTempPlan}, cfg.Verbose); err != nil { return result, fmt.Errorf("delete bootstrap temp ref for %s: %w", batch.Plan.TargetRef, err) } progressf(cfg.Verbose, "bootstrap-batch: branch=%s finalized", batch.Plan.TargetRef) }
if len(tagPlans) > 0 { progressf(cfg.Verbose, "bootstrap-batch: pushing %d tag(s) after branch batches", len(tagPlans)) tagTargetRefs := copyRefHashMap(targetRefs) for _, batch := range batches { tagTargetRefs[batch.Plan.TargetRef] = batch.Plan.SourceHash } packReader, err := sourceService.FetchPack(ctx, sourceConn, tagDesired, tagTargetRefs) if err != nil { if !errors.Is(err, git.NoErrAlreadyUpToDate) { return result, fmt.Errorf("fetch bootstrap tag pack: %w", err) } } else { defer packReader.Close() packReader = limitPackReadCloser(packReader, cfg.MaxPackBytes) if err := pushPackToTarget(ctx, targetConn, targetAdv, tagPlans, packReader, cfg.Verbose); err != nil { return result, fmt.Errorf("push bootstrap tags: %w", err) } } }
result.Pushed = len(plans) result.Batching = true result.RelayMode = "bootstrap-batch" result.Stats = stats.snapshot() return result, nil }
func actionForTargetHash(hash plumbing.Hash) Action { if hash.IsZero() { return ActionCreate } return ActionUpdate }
func singleDesiredRef(sourceRef, targetRef plumbing.ReferenceName, hash plumbing.Hash) map[plumbing.ReferenceName]desiredRef { return map[plumbing.ReferenceName]desiredRef{ targetRef: { Kind: RefKindBranch, Label: targetRef.Short(), SourceRef: sourceRef, TargetRef: targetRef, SourceHash: hash, }, } }
func singleHaveMap(hash plumbing.Hash) map[plumbing.ReferenceName]plumbing.Hash { if hash.IsZero() { return nil } return map[plumbing.ReferenceName]plumbing.Hash{ plumbing.ReferenceName("refs/gitsync/have"): hash, } }
func bootstrapTempRef(targetRef plumbing.ReferenceName) plumbing.ReferenceName { return plumbing.ReferenceName("refs/gitsync/bootstrap/heads/" + targetRef.Short()) }
func planBootstrapBatches( ctx context.Context, cfg Config, sourceConn *transportConn, sourceService *sourceRefService, desired []desiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash, ) ([]bootstrapBatch, error) { out := make([]bootstrapBatch, 0, len(desired)) for _, ref := range desired { checkpoints, err := planBootstrapBranchCheckpoints(ctx, cfg, sourceConn, sourceService, ref) if err != nil { return nil, err } out = append(out, bootstrapBatch{ Plan: BranchPlan{ Branch: ref.Label, SourceRef: ref.SourceRef, TargetRef: ref.TargetRef, SourceHash: ref.SourceHash, Kind: ref.Kind, Action: ActionCreate, }, TempRef: bootstrapTempRef(ref.TargetRef), ResumeHash: targetRefs[bootstrapTempRef(ref.TargetRef)], Checkpoints: checkpoints, }) } return out, nil }
func planBootstrapBranchCheckpoints( ctx context.Context, cfg Config, sourceConn *transportConn, sourceService *sourceRefService, ref desiredRef, ) ([]plumbing.Hash, error) { progressf(cfg.Verbose, "bootstrap-batch: fetching commit graph for %s", ref.TargetRef) graphRepo, err := git.Init(memory.NewStorage(), nil) if err != nil { return nil, fmt.Errorf("init bootstrap planning repository: %w", err) } if err := fetchSourceCommitGraphV2(ctx, graphRepo, sourceConn, sourceService.v2, ref); err != nil { return nil, fmt.Errorf("fetch bootstrap planning graph for %s: %w", ref.TargetRef, err) }
chain, err := firstParentChain(graphRepo, ref.SourceHash) if err != nil { return nil, fmt.Errorf("walk first-parent chain for %s: %w", ref.TargetRef, err) } if len(chain) == 0 { return nil, fmt.Errorf("empty first-parent chain for %s", ref.TargetRef) }
checkpoints := make([]plumbing.Hash, 0, len(chain)) prevIdx := -1 prevHash := plumbing.ZeroHash prevSpan := 0 for prevIdx < len(chain)-1 { bestIdx, err := largestCheckpointUnderLimit(ctx, cfg, sourceConn, sourceService, ref, chain, prevIdx, prevHash, prevSpan) if err != nil { return nil, err } if bestIdx <= prevIdx { return nil, fmt.Errorf("could not find bootstrap checkpoint for %s under batch-max-pack-bytes=%d", ref.TargetRef, cfg.BatchMaxPackBytes) } prevSpan = bestIdx - prevIdx prevIdx = bestIdx prevHash = chain[bestIdx] checkpoints = append(checkpoints, prevHash) progressf( cfg.Verbose, "bootstrap-batch: branch=%s planned-checkpoint=%s selected=%d chain-len=%d", ref.TargetRef, shortHash(prevHash), len(checkpoints), len(chain), ) } return checkpoints, nil }
func largestCheckpointUnderLimit( ctx context.Context, cfg Config, sourceConn *transportConn, sourceService *sourceRefService, ref desiredRef, chain []plumbing.Hash, prevIdx int, prevHash plumbing.Hash, prevSpan int, ) (int, error) { return sampledCheckpointUnderLimitByProbe(chain, prevIdx, prevSpan, func(idx int) (bool, error) { tooLarge, err := sourcePackExceedsLimit(ctx, sourceConn, sourceService, ref, chain[idx], prevHash, cfg.BatchMaxPackBytes) if err != nil { return false, fmt.Errorf("measure bootstrap batch for %s at %s: %w", ref.TargetRef, shortHash(chain[idx]), err) } if tooLarge { progressf(cfg.Verbose, "bootstrap-batch: sample %s exceeds limit=%d", shortHash(chain[idx]), cfg.BatchMaxPackBytes) } else { progressf(cfg.Verbose, "bootstrap-batch: sample %s fits limit=%d", shortHash(chain[idx]), cfg.BatchMaxPackBytes) } return tooLarge, nil }) }
func sampledCheckpointUnderLimitByProbe( chain []plumbing.Hash, prevIdx int, prevSpan int, probe func(idx int) (bool, error), ) (int, error) { lo := prevIdx + 1 hi := len(chain) - 1 if lo > hi { return -1, nil }
tooLarge, err := probe(lo) if err != nil { return -1, err } if tooLarge { return -1, nil } return lo, nil }
func sampledCheckpointCandidates(lo, hi int, prevSpan int) []int { if lo > hi { return nil }
set := map[int]struct{}{} add := func(idx int) { if idx < lo { idx = lo } if idx > hi { idx = hi } set[idx] = struct{}{} }
projected := hi if prevSpan > 0 { projected = lo + prevSpan - 1 } add(projected)
func firstParentChain(repo *git.Repository, tip plumbing.Hash) ([]plumbing.Hash, error) { commit, err := repo.CommitObject(tip) if err != nil { return nil, err } reversed := make([]plumbing.Hash, 0, 128) for { reversed = append(reversed, commit.Hash) if len(commit.ParentHashes) == 0 { break } commit, err = repo.CommitObject(commit.ParentHashes[0]) if err != nil { return nil, err } }
chain := make([]plumbing.Hash, 0, len(reversed)) for i := len(reversed) - 1; i >= 0; i-- { chain = append(chain, reversed[i]) } return chain, nil }
func sourcePackExceedsLimit( ctx context.Context, sourceConn *transportConn, sourceService *sourceRefService, ref desiredRef, want plumbing.Hash, have plumbing.Hash, limit int64, ) (bool, error) { packReader, err := sourceService.FetchPack(ctx, sourceConn, singleDesiredRef(ref.SourceRef, ref.TargetRef, want), singleHaveMap(have)) if err != nil { return false, err } defer packReader.Close() _, err = io.Copy(io.Discard, limitPackReadCloser(packReader, limit)) if err == nil { return false, nil } if strings.Contains(err.Error(), "source pack exceeded max-pack-bytes limit") { return true, nil } return false, err }
func bootstrapResumeIndex(checkpoints []plumbing.Hash, resumeHash plumbing.Hash) (int, error) { if resumeHash.IsZero() { return 0, nil } for idx, checkpoint := range checkpoints { if checkpoint == resumeHash { return idx + 1, nil } } return 0, fmt.Errorf("temp ref hash %s does not match any planned checkpoint", resumeHash) }
func selectBranches(source map[string]plumbing.Hash, requested []string) map[string]plumbing.Hash { if len(requested) == 0 { return source }
selected := make(map[string]plumbing.Hash, len(requested)) for _, branch := range requested { if hash, ok := source[branch]; ok { selected[branch] = hash } } return selected }
func buildDesiredRefs(sourceRefs map[plumbing.ReferenceName]plumbing.Hash, cfg Config) (map[plumbing.ReferenceName]desiredRef, map[plumbing.ReferenceName]managedTarget, error) { desired := make(map[plumbing.ReferenceName]desiredRef) managed := make(map[plumbing.ReferenceName]managedTarget)
addManaged := func(sourceRef, targetRef plumbing.ReferenceName, kind RefKind, hash plumbing.Hash) error { if hash.IsZero() { return fmt.Errorf("source ref %s not found", sourceRef) } short := targetRef.Short() desired[targetRef] = desiredRef{ Kind: kind, Label: short, SourceRef: sourceRef, TargetRef: targetRef, SourceHash: hash, } managed[targetRef] = managedTarget{Kind: kind, Label: short} return nil }
if len(cfg.Mappings) > 0 { for _, mapping := range cfg.Mappings { sourceRef, targetRef, kind, err := normalizeMapping(mapping) if err != nil { return nil, nil, err } if err := addManaged(sourceRef, targetRef, kind, sourceRefs[sourceRef]); err != nil { return nil, nil, err } } } else { branches := branchMapFromRefHashMap(sourceRefs) selected := selectBranches(branches, cfg.Branches) for branch, hash := range selected { refName := plumbing.NewBranchReferenceName(branch) if err := addManaged(refName, refName, RefKindBranch, hash); err != nil { return nil, nil, err } } }
return desired, managed, nil }
func normalizeMapping(mapping RefMapping) (plumbing.ReferenceName, plumbing.ReferenceName, RefKind, error) { src := strings.TrimSpace(mapping.Source) dst := strings.TrimSpace(mapping.Target) if src == "" || dst == "" { return "", "", "", fmt.Errorf("invalid mapping %q:%q", mapping.Source, mapping.Target) }
if strings.HasPrefix(src, "refs/") || strings.HasPrefix(dst, "refs/") { sourceRef := plumbing.ReferenceName(src) targetRef := plumbing.ReferenceName(dst) kind := refKindFromName(targetRef) if kind == "" { return "", "", "", fmt.Errorf("unsupported mapped ref kind: %s -> %s", src, dst) } return sourceRef, targetRef, kind, nil }
return plumbing.NewBranchReferenceName(src), plumbing.NewBranchReferenceName(dst), RefKindBranch, nil }
func refKindFromName(name plumbing.ReferenceName) RefKind { switch { case name.IsBranch(): return RefKindBranch case name.IsTag(): return RefKindTag default: return "" } }
type desiredRef struct { Kind RefKind Label string SourceRef plumbing.ReferenceName TargetRef plumbing.ReferenceName SourceHash plumbing.Hash }
type managedTarget struct { Kind RefKind Label string }
func buildPlans( repo *git.Repository, desired map[plumbing.ReferenceName]desiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash, managed map[plumbing.ReferenceName]managedTarget, cfg Config, ) ([]BranchPlan, error) { if cfg.Prune { for targetRef := range targetRefs { if _, ok := managed[targetRef]; ok { continue } switch { case targetRef.IsTag() && cfg.IncludeTags: managed[targetRef] = managedTarget{Kind: RefKindTag, Label: targetRef.Short()} case targetRef.IsBranch() && len(cfg.Mappings) == 0 && len(cfg.Branches) == 0: managed[targetRef] = managedTarget{Kind: RefKindBranch, Label: targetRef.Short()} } } }
plans := make([]BranchPlan, 0, len(targetNames)+8) for _, targetRef := range targetNames { info := managed[targetRef] want, existsInDesired := desired[targetRef] targetHash, existsOnTarget := targetRefs[targetRef]
plan, err := planRef(repo, want, targetHash, cfg.Force) if err != nil { return nil, err } plans = append(plans, plan) }
sort.Slice(plans, func(i, j int) bool { return plans[i].TargetRef.String() < plans[j].TargetRef.String() }) return plans, nil }
func planRef(repo *git.Repository, want desiredRef, targetHash plumbing.Hash, force bool) (BranchPlan, error) { plan := BranchPlan{ Branch: want.Label, SourceRef: want.SourceRef, TargetRef: want.TargetRef, SourceHash: want.SourceHash, TargetHash: targetHash, Kind: want.Kind, }
if want.SourceHash == targetHash { plan.Action = ActionSkip plan.Reason = fmt.Sprintf("%s already current", shortHash(want.SourceHash)) return plan, nil }
sourceCommit, err := repo.CommitObject(want.SourceHash) if err != nil { return plan, fmt.Errorf("load source commit for %s: %w", want.TargetRef, err) }
isFF, err := reachesCommitHash(repo.Storer, sourceCommit, targetHash) if err != nil { return plan, fmt.Errorf("check fast-forward for %s: %w", want.TargetRef, err) } if isFF { plan.Action = ActionUpdate plan.Reason = fmt.Sprintf("%s -> %s", shortHash(targetHash), shortHash(want.SourceHash)) return plan, nil }
if force { plan.Action = ActionUpdate plan.Reason = fmt.Sprintf("%s -> %s (force)", shortHash(targetHash), shortHash(want.SourceHash)) return plan, nil }
plan.Action = ActionBlock plan.Reason = fmt.Sprintf("%s is not an ancestor of %s", shortHash(targetHash), shortHash(want.SourceHash)) return plan, nil }
func planBranch(repo *git.Repository, branch string, sourceHash, targetHash plumbing.Hash) (BranchPlan, error) { return planRef(repo, desiredRef{ Kind: RefKindBranch, Label: branch, SourceRef: plumbing.NewBranchReferenceName(branch), TargetRef: plumbing.NewBranchReferenceName(branch), SourceHash: sourceHash, }, targetHash, false) }
func fetchSourceRefsWithHavesV1( ctx context.Context, repo *git.Repository, conn *transportConn, sourceAdv *packp.AdvRefs, desired map[plumbing.ReferenceName]desiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash, ) error { session, err := conn.transport.NewUploadPackSession(conn.endpoint, conn.authMethod()) if err != nil { return fmt.Errorf("open source upload-pack session: %w", err) } defer session.Close()
req := packp.NewUploadPackRequestFromCapabilities(sourceAdv.Capabilities) for _, ref := range desired { req.Wants = append(req.Wants, ref.SourceHash) } req.Wants = sortedUniqueHashes(req.Wants) req.Haves = sortedUniqueHashes(mapsRefValues(targetRefs)) if len(req.Wants) == 0 { return git.NoErrAlreadyUpToDate } if sourceAdv.Capabilities.Supports(capability.NoProgress) { _ = req.Capabilities.Set(capability.NoProgress) } if desiredHasTag(desired) && sourceAdv.Capabilities.Supports(capability.IncludeTag) { _ = req.Capabilities.Set(capability.IncludeTag) } conn.stats.addWantsHaves("source upload-pack", len(req.Wants), len(req.Haves))
if err := packfile.UpdateObjectStorage(repo.Storer, buildSidebandIfSupported(req.Capabilities, reader, nil)); err != nil { return fmt.Errorf("store source packfile: %w", err) }
for _, ref := range desired { localRef := plumbing.ReferenceName(localBranchRef(sourceRemoteName, ref.TargetRef.Short())) if ref.Kind == RefKindTag { localRef = plumbing.ReferenceName("refs/remotes/" + sourceRemoteName + "/tags/" + ref.TargetRef.Short()) } if err := repo.Storer.SetReference(plumbing.NewHashReference(localRef, ref.SourceHash)); err != nil { return fmt.Errorf("set local source ref %s: %w", ref.SourceRef, err) } } return nil }
func fetchSourcePackV1( ctx context.Context, conn *transportConn, sourceAdv *packp.AdvRefs, desired map[plumbing.ReferenceName]desiredRef, targetRefs map[plumbing.ReferenceName]plumbing.Hash, ) (io.ReadCloser, error) { session, err := conn.transport.NewUploadPackSession(conn.endpoint, conn.authMethod()) if err != nil { return nil, fmt.Errorf("open source upload-pack session: %w", err) }
req := packp.NewUploadPackRequestFromCapabilities(sourceAdv.Capabilities) for _, ref := range desired { req.Wants = append(req.Wants, ref.SourceHash) } req.Wants = sortedUniqueHashes(req.Wants) req.Haves = sortedUniqueHashes(mapsRefValues(targetRefs)) if len(req.Wants) == 0 { _ = session.Close() return nil, git.NoErrAlreadyUpToDate } if sourceAdv.Capabilities.Supports(capability.NoProgress) { _ = req.Capabilities.Set(capability.NoProgress) } if desiredHasTag(desired) && sourceAdv.Capabilities.Supports(capability.IncludeTag) { _ = req.Capabilities.Set(capability.IncludeTag) } conn.stats.addWantsHaves("source upload-pack", len(req.Wants), len(req.Haves))
reader, err := session.UploadPack(ctx, req) if err != nil { _ = session.Close() if errors.Is(err, transport.ErrEmptyUploadPackRequest) { return nil, git.NoErrAlreadyUpToDate } return nil, fmt.Errorf("source upload-pack: %w", err) } return &sessionReadCloser{ Reader: buildSidebandIfSupported(req.Capabilities, reader, nil), closeFn: func() error { _ = reader.Close() return session.Close() }, }, nil }
func desiredHasTag(desired map[plumbing.ReferenceName]desiredRef) bool { for _, ref := range desired { if ref.Kind == RefKindTag { return true } } return false }
func pushToTarget( ctx context.Context, repo *git.Repository, conn *transportConn, targetAdv *packp.AdvRefs, plans []BranchPlan, targetRefs map[plumbing.ReferenceName]plumbing.Hash, verbose bool, ) error { session, err := conn.transport.NewReceivePackSession(conn.endpoint, conn.authMethod()) if err != nil { return fmt.Errorf("open target receive-pack session: %w", err) } defer session.Close()
req := packp.NewReferenceUpdateRequestFromCapabilities(targetAdv.Capabilities) req.Progress = progressWriter(verbose) if targetAdv.Capabilities.Supports(capability.Sideband64k) { _ = req.Capabilities.Set(capability.Sideband64k) } else if targetAdv.Capabilities.Supports(capability.Sideband) { _ = req.Capabilities.Set(capability.Sideband) }
commands := make([]*packp.Command, 0, len(plans)) objects := make([]plumbing.Hash, 0, len(plans)) hasDelete := false hasUpdates := false for _, plan := range plans { cmd := &packp.Command{ Name: plan.TargetRef, Old: targetRefs[plan.TargetRef], } switch plan.Action { case ActionCreate, ActionUpdate: cmd.New = plan.SourceHash objects = append(objects, plan.SourceHash) hasUpdates = true case ActionDelete: cmd.New = plumbing.ZeroHash hasDelete = true } commands = append(commands, cmd) } req.Commands = commands conn.stats.addCommands("target receive-pack", len(commands)) if hasDelete { if !targetAdv.Capabilities.Supports(capability.DeleteRefs) { return fmt.Errorf("target does not support delete-refs") } _ = req.Capabilities.Set(capability.DeleteRefs) }
hashesToPush, err := objectsToPush(repo.Storer, objects, targetRefs) if err != nil { return fmt.Errorf("compute objects to push: %w", err) }
report, err := receivePack(ctx, session, repo.Storer, req, hashesToPush, hasUpdates, !targetAdv.Capabilities.Supports(capability.OFSDelta)) if err != nil { return err } if report != nil { if err := report.Error(); err != nil { return err } } return nil }
func pushPackToTarget( ctx context.Context, conn *transportConn, targetAdv *packp.AdvRefs, plans []BranchPlan, pack io.ReadCloser, verbose bool, ) error { session, err := conn.transport.NewReceivePackSession(conn.endpoint, conn.authMethod()) if err != nil { return fmt.Errorf("open target receive-pack session: %w", err) } defer session.Close()
commands := make([]*packp.Command, 0, len(plans)) for _, plan := range plans { cmd := &packp.Command{ Name: plan.TargetRef, Old: plan.TargetHash, } switch plan.Action { case ActionCreate, ActionUpdate: cmd.New = plan.SourceHash default: return fmt.Errorf("streamed pack push only supports create and update actions") } commands = append(commands, cmd) } req.Commands = commands conn.stats.addCommands("target receive-pack", len(commands))
report, err := receivePackStream(ctx, session, req, pack) if err != nil { return err } if report != nil { if err := report.Error(); err != nil { return err } } return nil }
func pushCommandsToTarget( ctx context.Context, conn *transportConn, targetAdv *packp.AdvRefs, plans []BranchPlan, verbose bool, ) error { session, err := conn.transport.NewReceivePackSession(conn.endpoint, conn.authMethod()) if err != nil { return fmt.Errorf("open target receive-pack session: %w", err) } defer session.Close()
commands := make([]*packp.Command, 0, len(plans)) hasDelete := false for _, plan := range plans { cmd := &packp.Command{ Name: plan.TargetRef, Old: plan.TargetHash, } switch plan.Action { case ActionCreate, ActionUpdate: cmd.New = plan.SourceHash case ActionDelete: cmd.New = plumbing.ZeroHash hasDelete = true default: return fmt.Errorf("command-only target push does not support %s", plan.Action) } commands = append(commands, cmd) } req.Commands = commands conn.stats.addCommands("target receive-pack", len(commands)) if hasDelete { if !targetAdv.Capabilities.Supports(capability.DeleteRefs) { return fmt.Errorf("target does not support delete-refs") } _ = req.Capabilities.Set(capability.DeleteRefs) }
report, err := receivePack(ctx, session, nil, req, nil, false, false) if err != nil { return err } if report != nil { if err := report.Error(); err != nil { return err } } return nil }
func receivePack( ctx context.Context, session transport.ReceivePackSession, store storer.Storer, req *packp.ReferenceUpdateRequest, hashes []plumbing.Hash, sendPack bool, useRefDeltas bool, ) (*packp.ReportStatus, error) { if !sendPack { return session.ReceivePack(ctx, req) }
rd, wr := io.Pipe() req.Packfile = rd done := make(chan error, 1)
report, err := session.ReceivePack(ctx, req) if err != nil { _ = rd.Close() return nil, err } if err := <-done; err != nil { return nil, err } return report, nil }
func receivePackStream( ctx context.Context, session transport.ReceivePackSession, req *packp.ReferenceUpdateRequest, pack io.ReadCloser, ) (*packp.ReportStatus, error) { req.Packfile = pack report, err := session.ReceivePack(ctx, req) if err != nil { _ = pack.Close() return nil, err } return report, pack.Close() }
func objectsToPush(store storer.Storer, wants []plumbing.Hash, targetRefs map[plumbing.ReferenceName]plumbing.Hash) ([]plumbing.Hash, error) { targetHaves := sortedUniqueHashes(mapsRefValues(targetRefs)) if len(wants) == 0 { return nil, nil }
haveSet := make(map[plumbing.Hash]struct{}, len(targetHaves)) for _, hash := range targetHaves { haveSet[hash] = struct{}{} }
filteredWants := make([]plumbing.Hash, 0, len(wants)) for _, hash := range sortedUniqueHashes(wants) { if _, ok := haveSet[hash]; ok { continue } filteredWants = append(filteredWants, hash) } if len(filteredWants) == 0 { return nil, nil }
seen := make(map[plumbing.Hash]bool, len(filteredWants)*4) objects := make([]plumbing.Hash, 0, len(filteredWants)*16) for _, hash := range filteredWants { if err := collectPushObjects(store, hash, haveSet, seen, &objects); err != nil { return nil, err } } return objects, nil }
func collectPushObjects( store storer.EncodedObjectStorer, hash plumbing.Hash, externalHaves map[plumbing.Hash]struct{}, seen map[plumbing.Hash]bool, out *[]plumbing.Hash, ) error { if hash.IsZero() { return nil } if _, ok := externalHaves[hash]; ok { return nil } if seen[hash] { return nil } seen[hash] = true
obj, err := store.EncodedObject(plumbing.AnyObject, hash) if err != nil { return fmt.Errorf("load object %s: %w", hash, err) }
switch obj.Type() { case plumbing.CommitObject: commit, err := object.GetCommit(store, hash) if err != nil { return fmt.Errorf("load commit %s: %w", hash, err) } if err := collectPushObjects(store, commit.TreeHash, externalHaves, seen, out); err != nil { return err } for _, parentHash := range commit.ParentHashes { if err := collectPushObjects(store, parentHash, externalHaves, seen, out); err != nil { return err } } case plumbing.TreeObject: tree, err := object.GetTree(store, hash) if err != nil { return fmt.Errorf("load tree %s: %w", hash, err) } for _, entry := range tree.Entries { if err := collectPushObjects(store, entry.Hash, externalHaves, seen, out); err != nil { return err } } case plumbing.TagObject: tag, err := object.GetTag(store, hash) if err != nil { return fmt.Errorf("load tag %s: %w", hash, err) } if err := collectPushObjects(store, tag.Target, externalHaves, seen, out); err != nil { return err } case plumbing.BlobObject: default: return fmt.Errorf("unsupported object type %s for %s", obj.Type(), hash) }
*out = append(*out, hash) return nil }
type sessionReadCloser struct { io.Reader closeFn func() error }
func (r *sessionReadCloser) Close() error { if r.closeFn == nil { return nil } return r.closeFn() }
func limitPackReadCloser(r io.ReadCloser, maxBytes int64) io.ReadCloser { if maxBytes <= 0 { return r } return &packLimitReadCloser{ ReadCloser: r, maxBytes: maxBytes, } }
type packLimitReadCloser struct { io.ReadCloser maxBytes int64 read int64 }
func (r *packLimitReadCloser) Read(p []byte) (int, error) { n, err := r.ReadCloser.Read(p) r.read += int64(n) if r.read > r.maxBytes { return n, fmt.Errorf("source pack exceeded max-pack-bytes limit (%d)", r.maxBytes) } return n, err }
func startMeasurement(enabled bool) func() Measurement { if !enabled { return func() Measurement { return Measurement{} } }
start := time.Now() var startStats runtime.MemStats runtime.ReadMemStats(&startStats)
done := make(chan struct{}) var ( mu sync.Mutex peakAlloc = startStats.Alloc peakHeapInuse = startStats.HeapInuse result Measurement )
go func() { ticker := time.NewTicker(10 * time.Millisecond) defer ticker.Stop() for { select { case <-done: return case <-ticker.C: var current runtime.MemStats runtime.ReadMemStats(¤t) mu.Lock() if current.Alloc > peakAlloc { peakAlloc = current.Alloc } if current.HeapInuse > peakHeapInuse { peakHeapInuse = current.HeapInuse } mu.Unlock() } } }()
func branchMapFromRefHashMap(refs map[plumbing.ReferenceName]plumbing.Hash) map[string]plumbing.Hash { branches := make(map[string]plumbing.Hash) for name, hash := range refs { if name.IsBranch() { branches[name.Short()] = hash } } return branches }
func refHashMap(refs []*plumbing.Reference) map[plumbing.ReferenceName]plumbing.Hash { out := make(map[plumbing.ReferenceName]plumbing.Hash) for _, ref := range refs { if ref.Type() == plumbing.HashReference { out[ref.Name()] = ref.Hash() } } return out }
func advertisedReferences(ar *packp.AdvRefs) ([]*plumbing.Reference, error) { refs, err := ar.AllReferences() if err != nil { return nil, err }
iter, err := refs.IterReferences() if err != nil { return nil, err } defer iter.Close()
var out []*plumbing.Reference err = iter.ForEach(func(ref *plumbing.Reference) error { out = append(out, ref) return nil }) return out, err }
type transportConn struct { label string endpoint *transport.Endpoint transport transport.Transport http *http.Client raw Endpoint auth transport.AuthMethod stats *statsCollector }
func newTransportConn(raw Endpoint, label string, stats *statsCollector) (*transportConn, error) { ep, err := transport.NewEndpoint(raw.URL) if err != nil { return nil, err } auth, err := resolveAuthMethod(raw, ep) if err != nil { return nil, err }
baseTransport := http.DefaultTransport if raw.SkipTLSVerify { if cloned, ok := http.DefaultTransport.(*http.Transport); ok { transportClone := cloned.Clone() if transportClone.TLSClientConfig == nil { transportClone.TLSClientConfig = &tls.Config{MinVersion: tls.VersionTLS12} } transportClone.TLSClientConfig.InsecureSkipVerify = true baseTransport = transportClone } }
httpClient := &http.Client{ Transport: &countingRoundTripper{ base: baseTransport, label: label, stats: stats, }, }
return &transportConn{ label: label, endpoint: ep, transport: transporthttp.NewClient(httpClient), http: httpClient, raw: raw, auth: auth, stats: stats, }, nil }
func (c *transportConn) authMethod() transport.AuthMethod { return c.auth }
func applyAuth(req *http.Request, authMethod transport.AuthMethod) { switch auth := authMethod.(type) { case *transporthttp.BasicAuth: auth.SetAuth(req) case *transporthttp.TokenAuth: auth.SetAuth(req) } }
func reachesCommitHash(store storer.EncodedObjectStorer, start *object.Commit, target plumbing.Hash) (bool, error) { if start.Hash == target { return true, nil }
seen := map[plumbing.Hash]bool{} stack := []*object.Commit{start}
for len(stack) > 0 { current := stack[len(stack)-1] stack = stack[:len(stack)-1] if seen[current.Hash] { continue } seen[current.Hash] = true
for _, parentHash := range current.ParentHashes { if parentHash == target { return true, nil } if seen[parentHash] { continue } parent, err := object.GetCommit(store, parentHash) if err != nil { if errors.Is(err, plumbing.ErrObjectNotFound) { continue } return false, err } stack = append(stack, parent) } }
return false, nil }
func mapsRefValues(input map[plumbing.ReferenceName]plumbing.Hash) []plumbing.Hash { out := make([]plumbing.Hash, 0, len(input)) for _, hash := range input { if !hash.IsZero() { out = append(out, hash) } } return out }
func copyRefHashMap(input map[plumbing.ReferenceName]plumbing.Hash) map[plumbing.ReferenceName]plumbing.Hash { out := make(map[plumbing.ReferenceName]plumbing.Hash, len(input)) for name, hash := range input { out[name] = hash } return out }
func sortedUniqueHashes(input []plumbing.Hash) []plumbing.Hash { seen := make(map[plumbing.Hash]bool, len(input)) out := make([]plumbing.Hash, 0, len(input)) for _, hash := range input { if seen[hash] { continue } seen[hash] = true out = append(out, hash) } plumbing.HashesSort(out) return out return plumbing.NewBranchReferenceName(raw) }
func countObjects(store storer.EncodedObjectStorer) (int, error) { 2 unmodified lines
return 0, err } defer iter.Close()
count := 0 err = iter.ForEach(func(obj plumbing.EncodedObject) error { err = iter.ForEach(func(_ plumbing.EncodedObject) error { count++ return nil }) return count, err }
func localBranchRef(remoteName, branch string) string { return plumbing.NewRemoteReferenceName(remoteName, branch).String() }
func shortHash(hash plumbing.Hash) string {
if hash.IsZero() {
return "
func parseHaveRef(raw string) plumbing.ReferenceName { raw = strings.TrimSpace(raw) if strings.HasPrefix(raw, "refs/") { return plumbing.ReferenceName(raw) } return plumbing.NewBranchReferenceName(raw) }
func progressWriter(verbose bool) io.Writer { if !verbose { return nil } return os.Stderr }
func progressf(verbose bool, format string, args ...interface{}) { if !verbose { return } fmt.Fprintf(os.Stderr, "[git-sync] %s\n", fmt.Sprintf(format, args...)) }
func (e Endpoint) authMethod() transport.AuthMethod { if e.BearerToken != "" { return &transporthttp.TokenAuth{Token: e.BearerToken} } if e.Token != "" { username := e.Username if username == "" { username = "git" } return &transporthttp.BasicAuth{Username: username, Password: e.Token} } return nil }
var gitCredentialFillCommand = func(ctx context.Context, input string) ([]byte, error) { cmd := exec.CommandContext(ctx, "git", "credential", "fill") cmd.Stdin = strings.NewReader(input) return cmd.Output() }
func resolveAuthMethod(raw Endpoint, ep *transport.Endpoint) (transport.AuthMethod, error) { if auth := raw.authMethod(); auth != nil { return auth, nil } if ep == nil { return nil, nil } if ep.Protocol != "http" && ep.Protocol != "https" { return nil, nil } if username, password, ok := lookupEntireDBCredential(raw, ep); ok { return &transporthttp.BasicAuth{Username: username, Password: password}, nil } username, password, ok := lookupGitCredential(ep) if !ok { return nil, nil } return &transporthttp.BasicAuth{Username: username, Password: password}, nil }
func lookupEntireDBCredential(raw Endpoint, ep *transport.Endpoint) (string, string, bool) { if ep == nil || ep.Host == "" { return "", "", false } credHost := endpointCredentialHost(ep) token, ok := lookupEntireDBToken(credHost, endpointBaseURL(ep), raw.SkipTLSVerify) if !ok || token == "" { return "", "", false } username := raw.Username if username == "" { username = "git" } return username, token, true }
func lookupEntireDBToken(host, baseURL string, skipTLSVerify bool) (string, bool) { configDir := os.Getenv("ENTIRE_CONFIG_DIR") if configDir == "" { home, err := os.UserHomeDir() if err != nil { return "", false } configDir = filepath.Join(home, ".config", "entire") }
username, ok := loadEntireDBActiveUser(host, configDir) if !ok || username == "" { return "", false } token, err := getEntireDBTokenWithRefresh(context.Background(), host, username, baseURL, skipTLSVerify) if err != nil { return "", false } if token == "" { return "", false } return token, true }
func getEntireDBTokenWithRefresh(ctx context.Context, host, username, baseURL string, skipTLSVerify bool) (string, error) { encodedToken, err := readEntireDBStoredToken(entireCredentialService(host), username) if err != nil { return "", err } token, expiresAt := decodeTokenWithExpiration(encodedToken) if token == "" { return "", nil } if !tokenExpiredOrExpiring(expiresAt) { return token, nil } refreshed, err := refreshEntireDBAccessToken(ctx, host, username, baseURL, skipTLSVerify) if err != nil { return token, nil } return refreshed, nil }
func decodeTokenWithExpiration(encoded string) (string, time.Time) { idx := strings.LastIndex(encoded, "|") if idx == -1 { return encoded, time.Time{} } token := encoded[:idx] expiresAtUnix, err := strconv.ParseInt(encoded[idx+1:], 10, 64) if err != nil { return encoded, time.Time{} } return token, time.Unix(expiresAtUnix, 0) }
func tokenExpiredOrExpiring(expiresAt time.Time) bool { if expiresAt.IsZero() { return true } return time.Now().Add(5 * time.Minute).After(expiresAt) }
func refreshEntireDBAccessToken(ctx context.Context, host, username, baseURL string, skipTLSVerify bool) (string, error) { refreshToken, err := readEntireDBStoredToken(entireCredentialService(host)+":refresh", username) if err != nil { return "", err } if refreshToken == "" || baseURL == "" { return "", errors.New("missing refresh token or base url") }
form := url.Values{} form.Set("grant_type", "refresh_token") form.Set("refresh_token", refreshToken) form.Set("client_id", entireCLIClientID)
client := &http.Client{ Timeout: 30 * time.Second, Transport: &http.Transport{ TLSClientConfig: &tls.Config{InsecureSkipVerify: skipTLSVerify}, //nolint:gosec }, } resp, err := client.Do(req) if err != nil { return "", err } defer resp.Body.Close() if resp.StatusCode != http.StatusOK { return "", fmt.Errorf("refresh failed with status %d", resp.StatusCode) }
if err := writeEntireDBStoredToken( entireCredentialService(host), username, encodeTokenWithExpiration(tokenResp.AccessToken, tokenResp.ExpiresIn), ); err != nil { return "", err } if tokenResp.RefreshToken != "" { _ = writeEntireDBStoredToken(entireCredentialService(host)+":refresh", username, tokenResp.RefreshToken) } return tokenResp.AccessToken, nil }
func encodeTokenWithExpiration(token string, expiresIn int64) string { return fmt.Sprintf("%s|%d", token, time.Now().Unix()+expiresIn) }
func entireCredentialService(host string) string { return "entire:" + host }
func readEntireDBStoredToken(service, username string) (string, error) { if os.Getenv("ENTIRE_TOKEN_STORE") == "file" { path := os.Getenv("ENTIRE_TOKEN_STORE_PATH") if path == "" { home, err := os.UserHomeDir() if err != nil { return "", err } path = filepath.Join(home, ".config", "entiredb", "tokens.json") } return readEntireDBFileToken(path, service, username) } return keyring.Get(service, username) }
func writeEntireDBStoredToken(service, username, password string) error { if os.Getenv("ENTIRE_TOKEN_STORE") == "file" { path := os.Getenv("ENTIRE_TOKEN_STORE_PATH") if path == "" { home, err := os.UserHomeDir() if err != nil { return err } path = filepath.Join(home, ".config", "entiredb", "tokens.json") } return writeEntireDBFileToken(path, service, username, password) } return keyring.Set(service, username, password) }
func readEntireDBFileToken(path, service, username string) (string, error) { data, err := os.ReadFile(path) if err != nil { if os.IsNotExist(err) { return "", keyring.ErrNotFound } return "", err } var store map[string]map[string]string if err := json.Unmarshal(data, &store); err != nil { return "", err } users := store[service] if users == nil { return "", keyring.ErrNotFound } password, ok := users[username] if !ok { return "", keyring.ErrNotFound } return password, nil }
func writeEntireDBFileToken(path, service, username, password string) error { store := map[string]map[string]string{} if data, err := os.ReadFile(path); err == nil { if err := json.Unmarshal(data, &store); err != nil { return err } } else if !os.IsNotExist(err) { return err } if store[service] == nil { store[service] = map[string]string{} } store[service][username] = password if err := os.MkdirAll(filepath.Dir(path), 0o700); err != nil { return err } data, err := json.Marshal(store) if err != nil { return err } return os.WriteFile(path, data, 0o600) }
func lookupGitCredential(ep *transport.Endpoint) (string, string, bool) { input := credentialFillInput(ep) if input == "" { return "", "", false } output, err := gitCredentialFillCommand(context.Background(), input) if err != nil { return "", "", false } values := parseCredentialFillOutput(output) password := values["password"] if password == "" { return "", "", false } username := values["username"] if username == "" { if ep.User != "" { username = ep.User } else { username = "git" } } return username, password, true }
func credentialFillInput(ep *transport.Endpoint) string { if ep == nil || ep.Host == "" { return "" } var builder strings.Builder builder.WriteString("protocol=") builder.WriteString(ep.Protocol) builder.WriteString("\n") builder.WriteString("host=") builder.WriteString(ep.Host) builder.WriteString("\n") if path := strings.TrimPrefix(ep.Path, "/"); path != "" { builder.WriteString("path=") builder.WriteString(path) builder.WriteString("\n") } if ep.User != "" { builder.WriteString("username=") builder.WriteString(ep.User) builder.WriteString("\n") } builder.WriteString("\n") return builder.String() }
func parseCredentialFillOutput(output []byte) map[string]string { values := map[string]string{} for _, line := range bytes.Split(output, []byte{'\n'}) { line = bytes.TrimSpace(line) if len(line) == 0 { continue } key, value, ok := bytes.Cut(line, []byte{'='}) if !ok { continue } values[string(key)] = string(value) } return values }
func buildSidebandIfSupported(l *capability.List, reader io.Reader, p sideband.Progress) io.Reader { var t sideband.Type switch { case l.Supports(capability.Sideband): t = sideband.Sideband case l.Supports(capability.Sideband64k): t = sideband.Sideband64k default: return reader }
d := sideband.NewDemuxer(t, reader) d.Progress = p return d }
type statsCollector struct { enabled bool items map[string]*ServiceStats }
func newStats(enabled bool) *statsCollector { return &statsCollector{enabled: enabled, items: map[string]*ServiceStats{}} }
func (s *statsCollector) addWantsHaves(name string, wants, haves int) { if !s.enabled { return } item := s.ensure(name) item.Wants += wants item.Haves += haves }
func (s *statsCollector) addCommands(name string, commands int) { if !s.enabled { return } item := s.ensure(name) item.Commands += commands }
func (s *statsCollector) recordRoundTrip(name string, requestBytes, responseBytes int64) { if !s.enabled { return } item := s.ensure(name) item.Requests++ item.RequestBytes += requestBytes item.ResponseBytes += responseBytes }
func (s *statsCollector) snapshot() Stats { out := Stats{Enabled: s.enabled, Items: map[string]*ServiceStats{}} for key, item := range s.items { copyItem := *item out.Items[key] = ©Item } return out }
type countingRoundTripper struct { base http.RoundTripper label string stats *statsCollector }
func (rt *countingRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) { res, err := rt.base.RoundTrip(req) if err != nil { return nil, err }
serviceName := req.Header.Get(statsPhaseHdr) if serviceName == "" { serviceName = req.URL.Query().Get("service") if serviceName == "" { serviceName = strings.TrimPrefix(req.URL.Path[strings.LastIndex(req.URL.Path, "/")+1:], "/") } } name := strings.TrimSpace(rt.label + " " + serviceName) requestBytes := req.ContentLength if requestBytes < 0 { requestBytes = 0 }
res.Body = &countingReadCloser{ ReadCloser: res.Body, onClose: func(n int64) { rt.stats.recordRoundTrip(name, requestBytes, n) }, } return res, nil }
type countingReadCloser struct { io.ReadCloser n int64 onClose func(int64) }
func (c *countingReadCloser) Read(p []byte) (int, error) { n, err := c.ReadCloser.Read(p) c.n += int64(n) return n, err }
func (c *countingReadCloser) Close() error { err := c.ReadCloser.Close() if c.onClose != nil { c.onClose(c.n) c.onClose = nil } return err }
Minternal/syncer/syncer.go+373/-2803
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package syncer
import ( "context" "fmt" "net/http" "net/http/httptest" "slices" "testing" "time"
git "github.com/go-git/go-git/v5" "github.com/go-git/go-git/v5/plumbing" "github.com/go-git/go-git/v5/plumbing/object" "github.com/go-git/go-git/v5/storage/memory" bstrap "github.com/soph/git-sync/internal/strategy/bootstrap" )
func TestSelectBranches(t *testing.T) { source := map[string]plumbing.Hash{ "main": plumbing.NewHash("1111111111111111111111111111111111111111"), "dev": plumbing.NewHash("2222222222222222222222222222222222222222"), }
got := selectBranches(source, []string{"dev", "missing"}) if len(got) != 1 || got["dev"] != source["dev"] { t.Fatalf("unexpected branch selection: %#v", got) } }
func TestPlanBranchSkip(t *testing.T) { hash := plumbing.NewHash("1111111111111111111111111111111111111111") plan, err := planBranch(nil, "main", hash, hash) if err != nil { t.Fatalf("planBranch returned error: %v", err) } if plan.Action != ActionSkip { t.Fatalf("expected skip, got %s", plan.Action) } }
func TestPlanBranchCreate(t *testing.T) { repo, err := git.Init(memory.NewStorage(), nil) if err != nil { t.Fatalf("init repo: %v", err) } sourceHash := seedCommit(t, repo, nil)
plan := BranchPlan{ Branch: "main", SourceHash: sourceHash, Action: ActionCreate, }
if plan.Action != ActionCreate { t.Fatalf("expected create") } }
func TestPlanBranchFastForwardAndBlock(t *testing.T) { repo, err := git.Init(memory.NewStorage(), nil) if err != nil { t.Fatalf("init repo: %v", err) }
root := seedCommit(t, repo, nil) next := seedCommit(t, repo, []plumbing.Hash{root}) side := seedCommit(t, repo, []plumbing.Hash{root})
ffPlan, err := planBranch(repo, "main", next, root) if err != nil { t.Fatalf("planBranch fast-forward: %v", err) } if ffPlan.Action != ActionUpdate { t.Fatalf("expected update, got %s", ffPlan.Action) }
blockPlan, err := planBranch(repo, "main", side, next) if err != nil { t.Fatalf("planBranch block: %v", err) } if blockPlan.Action != ActionBlock { t.Fatalf("expected block, got %s", blockPlan.Action) } }
func seedCommit(t *testing.T, repo *git.Repository, parents []plumbing.Hash) plumbing.Hash { t.Helper()
now := time.Now().UTC()
obj := repo.Storer.NewEncodedObject() commit := &object.Commit{ Author: object.Signature{ Name: "test", Email: "test@example.com", When: now, }, Committer: object.Signature{ Name: "test", Email: "test@example.com", When: now, }, Message: fmt.Sprintf("test-%d-%d", len(parents), now.UnixNano()), TreeHash: plumbing.ZeroHash, ParentHashes: parents, }
if err := commit.Encode(obj); err != nil { t.Fatalf("encode commit: %v", err) } hash, err := repo.Storer.SetEncodedObject(obj) if err != nil { t.Fatalf("store commit: %v", err) } return hash }
func TestSampledCheckpointUnderLimitByProbe(t *testing.T) { chain := make([]plumbing.Hash, 40) for i := range chain { chain[i] = plumbing.NewHash(fmt.Sprintf("%040x", i+1)) }
var probes []int best, err := sampledCheckpointUnderLimitByProbe(chain, 4, 8, func(idx int) (bool, error) { probes = append(probes, idx) return idx > 19, nil }) if err != nil { t.Fatalf("sampledCheckpointUnderLimitByProbe: %v", err) } if best < 12 || best > 19 { t.Fatalf("expected a reasonable sampled checkpoint, got %d", best) } if len(probes) > 6 { t.Fatalf("expected fixed small probe count, got %d probes: %v", len(probes), probes) } }
func TestGitHubOwnerRepo(t *testing.T) { conn, err := newTransportConn(Endpoint{URL: "https://github.com/torvalds/linux.git"}, "source", newStats(false)) stats := newStats(false) conn, err := newConn(Endpoint{URL: "https://github.com/torvalds/linux.git"}, "source", stats) if err != nil { t.Fatalf("new transport conn: %v", err) t.Fatalf("new conn: %v", err) } owner, repo, ok := githubOwnerRepo(conn) owner, repo, ok := bstrap.GitHubOwnerRepo(conn) if !ok { t.Fatalf("expected github owner/repo match") } 3 unmodified lines
}
func TestGitHubOwnerRepoRejectsNonGitHubSource(t *testing.T) { conn, err := newTransportConn(Endpoint{URL: "https://gitlab.com/group/project.git"}, "source", newStats(false)) stats := newStats(false) conn, err := newConn(Endpoint{URL: "https://gitlab.com/group/project.git"}, "source", stats) if err != nil { t.Fatalf("new transport conn: %v", err) t.Fatalf("new conn: %v", err) } if _, _, ok := githubOwnerRepo(conn); ok { if _, _, ok := bstrap.GitHubOwnerRepo(conn); ok { t.Fatalf("expected non-github source to be rejected") } }
func TestGitHubBootstrapBatchMaxPackBytesLargeRepo(t *testing.T) {
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path != "/repos/torvalds/linux" {
t.Fatalf("unexpected path: %s", r.URL.Path)
}
w.Header().Set("Content-Type", "application/json")
_, _ = w.Write([]byte(fmt.Sprintf({"size":%d}, githubLargeRepoThresholdKB+1)))
}))
defer server.Close()
originalAPIBaseURL := githubRepoAPIBaseURL githubRepoAPIBaseURL = server.URL t.Cleanup(func() { githubRepoAPIBaseURL = originalAPIBaseURL })
conn, err := newTransportConn(Endpoint{URL: "https://github.com/torvalds/linux.git"}, "source", newStats(false)) if err != nil { t.Fatalf("new transport conn: %v", err) }
batchLimit, ok := githubBootstrapBatchMaxPackBytes(context.Background(), Config{}, conn, &sourceRefService{ protocol: protocolModeV2, v2: &v2CapabilityAdvertisement{Capabilities: map[string]string{ "fetch": "thin-pack filter", }}, }) if !ok { t.Fatalf("expected github preflight to select batched mode") } if batchLimit != defaultAutoBatchMaxPackBytes { t.Fatalf("unexpected batch limit: %d", batchLimit) } }
func TestGitHubBootstrapBatchMaxPackBytesSkipsSmallRepo(t *testing.T) {
server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
_, _ = w.Write([]byte({"size":1024}))
}))
defer server.Close()
originalAPIBaseURL := githubRepoAPIBaseURL githubRepoAPIBaseURL = server.URL t.Cleanup(func() { githubRepoAPIBaseURL = originalAPIBaseURL })
conn, err := newTransportConn(Endpoint{URL: "https://github.com/octocat/Hello-World.git"}, "source", newStats(false)) if err != nil { t.Fatalf("new transport conn: %v", err) }
if _, ok := githubBootstrapBatchMaxPackBytes(context.Background(), Config{}, conn, &sourceRefService{ protocol: protocolModeV2, v2: &v2CapabilityAdvertisement{Capabilities: map[string]string{ "fetch": "thin-pack filter", }}, }); ok { t.Fatalf("expected small github repo to keep single-pack bootstrap") } }
Minternal/syncer/syncer\_test.go+9/-216