# Merge pull request #1665 from entireio/feat/mirror-list-filter-sort

`fce2956`→[main](/content/gh/entireio/cli/commits/main/index.html)

## Changes

- cmd/entire/cli
  - Mrepo_mirror.go+175/-14
  - Mrepo_mirror_test.go+314/-7

```
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package cli

import (
	"cmp"
	"context"
	"errors"
	"fmt"
	"net"
	"net/url"
	"regexp"
	"slices"
	"strings"
	"time"
	"github.com/entireio/cli/internal/coreapi"
)

const (
	colRepo     = "REPO"
	colCloneURL = "CLONE URL"
	colPrivate  = "PRIVATE"
	colAccess   = "ACCESS"
	colStatus   = "STATUS"
)

var mirrorColumns = []string{"REPO", "CLONE URL", "PRIVATE"}

func mirrorPrivate(m coreapi.Mirror) string {
	if m.IsPrivate.Or(false) {
		return "yes"
	}
	return "no"
}

func mirrorRow(m coreapi.Mirror) []string {
	repo := m.Owner + "/" + m.Repo
	cloneURL := mirrorCloneURL(m.ClusterHost, m.Owner, m.Repo)
	private := "no"
	if m.IsPrivate.Or(false) {
		private = "yes"
	}
	return []string{repo, cloneURL, mirrorPrivate(m)}
}

func parseSortColumn(spec string, columns []string) (col string, desc bool, err error) {
	spec = strings.TrimSpace(spec)
	desc = strings.HasPrefix(spec, "-")
	name := strings.TrimSpace(strings.TrimPrefix(spec, "-"))
	if name == "" {
		return columns[0], desc, nil
	}
	for _, h := range columns {
		if strings.EqualFold(h, name) {
			return h, desc, nil
		}
	}
	return "", false, fmt.Errorf("unknown sort column %q; valid columns: %s", name, strings.ToLower(strings.Join(columns, ", "))) 
}

func sortMirrors(mirrors []coreapi.Mirror, spec string) error {
	col, desc, err := parseSortColumn(spec, mirrorColumns)
	if err != nil {
		return err
	}
	key := func(m coreapi.Mirror) string {
		switch col {
		case colCloneURL:
			return strings.ToLower(mirrorCloneURL(m.ClusterHost, m.Owner, m.Repo))
		case colPrivate:
			return mirrorPrivate(m)
		default: // repo -> tiebreak alone
			return ""
		}
	}
	slices.SortStableFunc(mirrors, func(a, b coreapi.Mirror) int {
		c := cmp.Compare(key(a), key(b))
		if c == 0 {
			c = cmp.Compare(strings.ToLower(a.Owner+"/"+a.Repo), strings.ToLower(b.Owner+"/"+b.Repo))
		}
		if c == 0 {
			c = cmp.Compare(strings.ToLower(a.ClusterHost), strings.ToLower(b.ClusterHost))
		}
		if desc {
			return -c
		}
		return c
	})
	return nil
}

func newRepoMirrorListCmd() *cobra.Command {
	var cluster, provider, owner, repo string
	var sortSpec string
	var showAvailable bool
	cmd := &cobra.Command{
		Use:   "list",
		Short: "List mirrors you can see (or, with --show-available, repos you could mirror)",
		Args:  cobra.NoArgs,
		PreRunE: func(_ *cobra.Command, _ []string) error {
			cols := mirrorColumns
			if showAvailable {
				cols = availableMirrorColumns
			}
			_, _, err := parseSortColumn(sortSpec, cols)
			return err
		},
		RunE: func(cmd *cobra.Command, _ []string) error {
			if showAvailable {
				return runCoreList(cmd, "No repos available to mirror.", availableMirrorColumns, availableMirrorRow, func(ctx context.Context, c *coreapi.Client) ([]coreapi.AvailableMirror, error) {
					// Implementation here
				})
			}
			return runCoreList(cmd, "No mirrors found.", mirrorColumns, mirrorRow, func(ctx context.Context, c *coreapi.Client) ([]coreapi.Mirror, error) {
				// Implementation here
			})
		},
	}
	cmd.Flags().StringVar(&cluster, "cluster", "", "Filter by cluster public host")
	cmd.Flags().StringVar(&provider, "provider", "", "Filter by upstream provider (e.g. github)")
	cmd.Flags().StringVar(&owner, "owner", "", "Filter by upstream owner login")
	cmd.Flags().StringVar(&repo, "repo", "", "Filter by owner/repo substring, matching the REPO column (case-insensitive)")
	cmd.Flags().StringVar(&sortSpec, "sort", "", "Sort by column (header name; prefix '-' for descending). Default: repo name ascending")
	cmd.Flags().BoolVar(&showAvailable, "show-available", false, "Instead of existing mirrors, list GitHub repos you could onboard as mirrors (ignores --cluster/--provider)")
	return cmd
}
```