# Plumb TargetHEAD through Result/ProbeResult/bridge `e470b83`· Soph·2mo ago·2 files·+24 added/-9 removed syncer.Result and syncer.ProbeResult re-gain the TargetHEAD field. internalbridge.ProbeResult.TargetHEAD and ExecutionSummary.TargetHEAD expose it to library callers / JSON output. Human Lines() emit a "target-head: " line when populated. All Result construction sites (sync, replicate, bootstrap wrapper) pick up s.target.headTarget. ProbeResult does the same in the s.target != nil branch. Together with the previous commit's upload-pack discovery, callers can now see both sides of the HEAD picture and decide what to do — git-sync still doesn't actively propagate HEAD over the wire (no go-git symref-update support yet), but the field-equality check is enough for a CLI script or downstream tool to detect a default-branch mismatch. Refs #45. Co-Authored-By: Claude Opus 4.7 (1M context) ## Sessions 0b4edbe8a55fView transcript [?\ do we have integration tests?Claude Code·Opus 4.7\[1m\]·1 step](/content/gh/entireio/git-sync/session/d0406407-d612-489d-b375-1372d062af82#timeline-0b4edbe8a55f/index.html) ## Changes 2 - internal/syncer - Msyncer.go+20/-9 - internalbridge - Mmodel.go+4 ``` 130 unmodified lines 131 132 133 134 135 136 137 138 139 134 135 136 137 138 139 140 141 142 12 unmodified lines 155 156 157 158 159 160 161 23 unmodified lines 185 186 187 188 189 190 191 192 193 8 unmodified lines 202 203 204 205 206 207 208 10 unmodified lines 219 220 221 222 223 224 225 226 227 503 unmodified lines 731 732 733 726 734 735 736 737 37 unmodified lines 775 776 777 770 778 779 780 781 80 unmodified lines 862 863 864 865 866 867 868 12 unmodified lines 881 882 883 884 885 886 887 190 unmodified lines 1078 1079 1080 1071 1081 1082 1083 1084 100 unmodified lines 1185 1186 1187 1188 1189 1190 1191 130 unmodified lines // Result holds the outcome of a sync or bootstrap operation. // // SourceHEAD carries the source's symref HEAD target as read from the // upload-pack advertisement. It lets callers compare against the target's // intended default branch without scraping the notice stream. Target HEAD // is not exposed here because the receive-pack advertisement we already // perform doesn't include HEAD; surfacing target HEAD would need a // separate upload-pack round-trip and is tracked as a follow-up. // SourceHEAD and TargetHEAD carry each side's symref HEAD target. Source // is parsed from the upload-pack advertisement we already make. Target // requires an additional upload-pack info-refs round-trip (the // receive-pack advertisement omits HEAD by protocol design); when that // fails — push-only auth, empty target where HEAD's underlying ref // doesn't exist — TargetHEAD is empty. type Result struct { Plans []BranchPlan `json:"plans"` Pushed int `json:"pushed"` 12 unmodified lines TempRefs []string `json:"tempRefs"` BootstrapSuggested bool `json:"bootstrapSuggested"` SourceHEAD plumbing.ReferenceName `json:"sourceHead,omitempty"` TargetHEAD plumbing.ReferenceName `json:"targetHead,omitempty"` Stats Stats `json:"stats"` Measurement Measurement `json:"measurement"` Protocol string `json:"protocol"` 23 unmodified lines if r.SourceHEAD != "" { lines = append(lines, "source-head: "+r.SourceHEAD.String()) } if r.TargetHEAD != "" { lines = append(lines, "target-head: "+r.TargetHEAD.String()) } return lines } 8 unmodified lines TargetCaps []string `json:"targetCapabilities,omitempty"` Refs []RefInfo `json:"refs"` SourceHEAD plumbing.ReferenceName `json:"sourceHead,omitempty"` TargetHEAD plumbing.ReferenceName `json:"targetHead,omitempty"` Stats Stats `json:"stats"` Measurement Measurement `json:"measurement"` } 10 unmodified lines if r.SourceHEAD != "" { lines = append(lines, "source-head: "+r.SourceHEAD.String()) } if r.TargetHEAD != "" { lines = append(lines, "target-head: "+r.TargetHEAD.String()) } if len(r.Capabilities) > 0 { lines = append(lines, "source-capabilities: "+strings.Join(r.Capabilities, ", ")) } 503 unmodified lines Plans: plans, DryRun: true, RelayReason: reason, OperationMode: modeSync, BootstrapSuggested: true, Stats: stats.snapshot(), Measurement: measurementDone(), Protocol: sourceService.Protocol, SourceHEAD: sourceService.HeadTarget, SourceHEAD: sourceService.HeadTarget, TargetHEAD: s.target.headTarget, }, nil } return bootstrapWithInputs(ctx, s, desiredRefs, targetRefMap, reason) 37 unmodified lines result := Result{ Plans: plans, DryRun: s.cfg.DryRun, OperationMode: modeSync, Protocol: sourceService.Protocol, Stats: stats.snapshot(), Measurement: measurementDone(), SourceHEAD: sourceService.HeadTarget, SourceHEAD: sourceService.HeadTarget, TargetHEAD: s.target.headTarget, } pushPlans := make([]BranchPlan, 0, len(plans)) 80 unmodified lines Measurement: s.measurementDone(), Protocol: s.sourceService.Protocol, SourceHEAD: s.sourceService.HeadTarget, TargetHEAD: s.target.headTarget, }, nil } return bootstrapWithInputs(ctx, s, desiredRefs, s.target.refMap, "empty-target-managed-refs") 12 unmodified lines Stats: s.stats.snapshot(), Measurement: s.measurementDone(), SourceHEAD: s.sourceService.HeadTarget, TargetHEAD: s.target.headTarget, } pushPlans := make([]BranchPlan, 0, len(plans)) 190 unmodified lines Batching: bResult.Batching, BatchCount: bResult.BatchCount, PlannedBatchCount: bResult.PlannedBatchCount, TempRefs: bResult.TempRefs, Stats: s.stats.snapshot(), Measurement: s.measurementDone(), Protocol: s.sourceService.Protocol, SourceHEAD: s.sourceService.HeadTarget, SourceHEAD: s.sourceService.HeadTarget, TargetHEAD: s.target.headTarget, }, nil } } 100 unmodified lines if s.target != nil { result.TargetURL = s.cfg.Target.URL result.TargetCaps = gitproto.AdvRefsCaps(s.target.adv) result.TargetHEAD = s.target.headTarget result.Stats = s.stats.snapshot() result.Measurement = s.measurementDone() } `` Minternal/syncer/syncer.go+20/-9 `` 87 unmodified lines 88 89 90 91 92 93 94 21 unmodified lines 116 117 118 119 120 121 122 18 unmodified lines 141 142 143 144 145 146 147 22 unmodified lines 170 171 172 173 174 175 176 87 unmodified lines TargetCaps []string `json:"targetCapabilities,omitempty"` Refs []RefInfo `json:"refs"` SourceHEAD string `json:"sourceHead,omitempty"` TargetHEAD string `json:"targetHead,omitempty"` Stats Stats `json:"stats"` Measurement Measurement `json:"measurement"` } 21 unmodified lines Reason string `json:"reason"` BootstrapSuggested bool `json:"bootstrapSuggested"` SourceHEAD string `json:"sourceHead,omitempty"` TargetHEAD string `json:"targetHead,omitempty"` Batch BatchSummary `json:"batch"` } 18 unmodified lines TargetCaps: append([]string(nil), result.TargetCaps...), Refs: make([]RefInfo, 0, len(result.Refs)), SourceHEAD: result.SourceHEAD.String(), TargetHEAD: result.TargetHEAD.String(), Stats: FromStats(result.Stats), Measurement: FromMeasurement(result.Measurement), } 22 unmodified lines Reason: result.RelayReason, BootstrapSuggested: result.BootstrapSuggested, SourceHEAD: result.SourceHEAD.String(), TargetHEAD: result.TargetHEAD.String(), Batch: BatchSummary{ Enabled: result.Batching, Planned: result.PlannedBatchCount,