| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "encoding/json" |
| 6 | "errors" |
| 7 | "os" |
| 8 | "path/filepath" |
| 9 | "sort" |
| 10 | "strings" |
| 11 | |
| 12 | "reasonix/internal/agent" |
| 13 | "reasonix/internal/provider" |
| 14 | "reasonix/internal/session" |
| 15 | "reasonix/internal/store" |
| 16 | ) |
| 17 | |
| 18 | // A conversion is linked by persisted provenance, never by title or a coincident |
| 19 | // ID. LegacyDir identifies the immutable original snapshot of an unnamed head. |
| 20 | type desktopMigrationConversion struct { |
| 21 | extra map[string]json.RawMessage |
| 22 | Root string `json:"root"` |
| 23 | SessionID string `json:"sessionId"` |
| 24 | HeadID string `json:"headId,omitempty"` |
| 25 | LegacyDir string `json:"legacyDir,omitempty"` |
| 26 | Codec string `json:"codec"` |
| 27 | Depth int `json:"depth"` |
| 28 | } |
| 29 | |
| 30 | type desktopMigrationStoredSource struct { |
| 31 | dir string |
| 32 | manifest session.Manifest |
| 33 | } |
| 34 | |
| 35 | func discoverDesktopMigrationConversions(ctx context.Context, sources map[string]*desktopMigrationSource) (map[string][]desktopMigrationConversion, map[string]bool, error) { |
| 36 | nodes := map[string]desktopMigrationStoredSource{} |
| 37 | var joined error |
| 38 | for _, source := range sources { |
| 39 | entries, err := os.ReadDir(source.root) |
| 40 | if os.IsNotExist(err) { |
| 41 | continue |
| 42 | } |
| 43 | if err != nil { |
| 44 | joined = errors.Join(joined, err) |
| 45 | continue |
| 46 | } |
| 47 | for _, entry := range entries { |
| 48 | if err := ctx.Err(); err != nil { |
| 49 | return nil, nil, err |
| 50 | } |
| 51 | if !entry.IsDir() || strings.HasPrefix(entry.Name(), ".") { |
| 52 | continue |
| 53 | } |
| 54 | dir := filepath.Join(source.root, entry.Name()) |
| 55 | manifest, err := readDesktopMigrationManifest(dir) |
| 56 | // Normal source migration reports damaged/unsupported stores. A bad |
| 57 | // manifest cannot authorize suppressing another source. |
| 58 | if err != nil || manifest.SessionID != entry.Name() { |
| 59 | continue |
| 60 | } |
| 61 | nodes[canonicalRuntimeRoot(dir)] = desktopMigrationStoredSource{dir: dir, manifest: manifest} |
| 62 | } |
| 63 | } |
| 64 | var origin func(desktopMigrationStoredSource, map[string]bool) (string, string, string, int, bool) |
| 65 | origin = func(node desktopMigrationStoredSource, seen map[string]bool) (string, string, string, int, bool) { |
| 66 | key := canonicalRuntimeRoot(node.dir) |
| 67 | if seen[key] || len(seen) >= 32 { |
| 68 | return "", "", "", 0, false |
| 69 | } |
| 70 | if node.manifest.Source == nil { |
| 71 | return key, "", "", 0, true |
| 72 | } |
| 73 | seen[key] = true |
| 74 | provenance := node.manifest.Source |
| 75 | if store.IsSessionTranscriptName(filepath.Base(provenance.Path)) && (provenance.Version == "" || provenance.Version == "legacy") { |
| 76 | return canonicalRuntimeRoot(provenance.Path), provenance.LegacyHeadID, filepath.Join(node.dir, "legacy"), 1, true |
| 77 | } |
| 78 | parent, found := nodes[canonicalRuntimeRoot(provenance.Path)] |
| 79 | if !found { |
| 80 | // Preview conversion preserves the old manifest inside its archive, |
| 81 | // so ancestry remains available after removal of an intermediate store. |
| 82 | dir := filepath.Join(node.dir, "legacy", "prototype") |
| 83 | manifest, err := readDesktopMigrationManifest(dir) |
| 84 | if err != nil { |
| 85 | return "", "", "", 0, false |
| 86 | } |
| 87 | parent = desktopMigrationStoredSource{dir: dir, manifest: manifest} |
| 88 | } |
| 89 | path, head, legacyDir, depth, ok := origin(parent, seen) |
| 90 | if ok && parent.manifest.Source == nil { |
| 91 | // Separate conversions archive the same native source in different |
| 92 | // directories. Keep its persisted identity after the original is |
| 93 | // removed; the archive location is not a new conversation origin. |
| 94 | path = canonicalRuntimeRoot(provenance.Path) |
| 95 | } |
| 96 | return path, head, legacyDir, depth + 1, ok |
| 97 | } |
| 98 | hidden := desktopMigrationRecoveryStores(nodes) |
| 99 | result := map[string][]desktopMigrationConversion{} |
| 100 | for key, node := range nodes { |
| 101 | if hidden[key] { |
| 102 | continue |
| 103 | } |
| 104 | path, head, legacyDir, depth, ok := origin(node, map[string]bool{}) |
| 105 | if !ok { |
| 106 | continue |
| 107 | } |
| 108 | result[path] = append(result[path], desktopMigrationConversion{Root: filepath.Dir(node.dir), SessionID: filepath.Base(node.dir), HeadID: head, LegacyDir: legacyDir, Codec: node.manifest.Codec, Depth: depth}) |
| 109 | } |
| 110 | for path := range result { |
| 111 | sort.Slice(result[path], func(i, j int) bool { |
| 112 | a, b := result[path][i], result[path][j] |
| 113 | if a.Depth != b.Depth { |
| 114 | return a.Depth > b.Depth |
| 115 | } |
| 116 | return filepath.Join(a.Root, a.SessionID) < filepath.Join(b.Root, b.SessionID) |
| 117 | }) |
| 118 | } |
| 119 | return result, hidden, joined |
| 120 | } |
| 121 | |
| 122 | func readDesktopMigrationManifest(dir string) (session.Manifest, error) { |
| 123 | body, err := os.ReadFile(filepath.Join(dir, "manifest.json")) |
| 124 | if err != nil { |
| 125 | return session.Manifest{}, err |
| 126 | } |
| 127 | var manifest session.Manifest |
| 128 | if err := json.Unmarshal(body, &manifest); err != nil { |
| 129 | return manifest, err |
| 130 | } |
| 131 | if manifest.Codec != session.Codec && manifest.Codec != session.PrototypeCodec && manifest.Codec != session.LegacyLinearCodec && manifest.Codec != session.FinalV31Codec { |
| 132 | return manifest, session.ErrUnsupportedVersion |
| 133 | } |
| 134 | return manifest, nil |
| 135 | } |
| 136 | |
| 137 | func desktopLegacyMigrationFiles(path string, source desktopMigrationSource) []string { |
| 138 | files := desktopLegacySourceFiles(path, source.pairedRoot) |
| 139 | for _, converted := range source.conversions[canonicalRuntimeRoot(path)] { |
| 140 | files = append(files, canonicalMigrationSourceFiles(converted.Root, converted.SessionID)...) |
| 141 | files = append(files, legacyMigrationSourceFiles(filepath.Join(converted.LegacyDir, filepath.Base(path)))...) |
| 142 | } |
| 143 | return files |
| 144 | } |
| 145 | |
| 146 | func resolveDesktopConversionHeads(ctx context.Context, path string, candidates []desktopMigrationConversion) ([]desktopMigrationConversion, error) { |
| 147 | resolved := append([]desktopMigrationConversion(nil), candidates...) |
| 148 | for index := range resolved { |
| 149 | converted := &resolved[index] |
| 150 | if converted.HeadID != "" || converted.LegacyDir == "" { |
| 151 | continue |
| 152 | } |
| 153 | // An omitted head means the selected head at conversion time, not the |
| 154 | // source's current selection. Read the preserved snapshot to recover it. |
| 155 | frozenPath := filepath.Join(converted.LegacyDir, filepath.Base(path)) |
| 156 | heads, err := session.LegacyMigrationHeads(ctx, frozenPath) |
| 157 | if err != nil { |
| 158 | return nil, err |
| 159 | } |
| 160 | for _, head := range heads { |
| 161 | if head.Selected && !head.Retired { |
| 162 | converted.HeadID = head.ID |
| 163 | break |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | return resolved, nil |
| 168 | } |
| 169 | |
| 170 | type desktopMigrationStagedNode struct { |
| 171 | service *session.Service |
| 172 | checkpoint desktopMigrationCheckpoint |
| 173 | ref session.SessionRef |
| 174 | messages []provider.Message |
| 175 | digest string |
| 176 | targetID string |
| 177 | coveredBy int |
| 178 | origin session.SessionOrigin |
| 179 | } |
| 180 | |
| 181 | // All generations of one legacy head are staged before publication. Maximal |
| 182 | // histories survive; equal/prefix ancestors get receipts for the same target. |
| 183 | // Incomparable continuations remain separate conversations. |
| 184 | func (a *App) migrateConversionLineage(ctx context.Context, path, headID string, source desktopMigrationSource, cp *desktopMigrationCheckpoint, workspaceID string) (retErr error) { |
| 185 | tmp, err := os.MkdirTemp("", "reasonix-lineage-") |
| 186 | if err != nil { |
| 187 | return err |
| 188 | } |
| 189 | defer os.RemoveAll(tmp) |
| 190 | stages := []*session.Service{} |
| 191 | defer func() { |
| 192 | for _, stage := range stages { |
| 193 | retErr = errors.Join(retErr, stage.Shutdown(context.Background())) |
| 194 | } |
| 195 | }() |
| 196 | newStage := func() (*session.Service, error) { |
| 197 | // A continued descendant can have the same ID/source stamp as the |
| 198 | // import of its ancestor. Isolate inputs so reuse cannot substitute a |
| 199 | // descendant's newer history while computing the ancestor's digest. |
| 200 | dir, err := os.MkdirTemp(tmp, "source-") |
| 201 | if err != nil { |
| 202 | return nil, err |
| 203 | } |
| 204 | stage, err := session.NewService("migration-stage", session.NewFilesystemPersistence(filepath.Join(dir, "sessions-v4"))) |
| 205 | if err == nil { |
| 206 | stages = append(stages, stage) |
| 207 | } |
| 208 | return stage, err |
| 209 | } |
| 210 | nodes := []desktopMigrationStagedNode{} |
| 211 | add := func(stage *session.Service, ref session.SessionRef, checkpoint desktopMigrationCheckpoint, origin session.SessionOrigin) error { |
| 212 | if err := stage.Close(ctx, ref); err != nil { |
| 213 | return err |
| 214 | } |
| 215 | messages, err := stage.Query().History(ctx, ref) |
| 216 | if err != nil { |
| 217 | return err |
| 218 | } |
| 219 | digest, err := agent.ContentDigestForMessages(messages) |
| 220 | if err != nil { |
| 221 | return err |
| 222 | } |
| 223 | nodes = append(nodes, desktopMigrationStagedNode{service: stage, checkpoint: checkpoint, ref: ref, messages: messages, digest: digest, coveredBy: -1, origin: origin}) |
| 224 | return nil |
| 225 | } |
| 226 | for _, converted := range source.headConversions { |
| 227 | key := desktopCanonicalMigrationKey(converted.Root, converted.SessionID) |
| 228 | checkpoint, err := newDesktopMigrationCheckpoint(source, key, canonicalMigrationSourceFiles(converted.Root, converted.SessionID)) |
| 229 | if err != nil { |
| 230 | return err |
| 231 | } |
| 232 | stage, err := newStage() |
| 233 | if err != nil { |
| 234 | return err |
| 235 | } |
| 236 | var runtime *session.Runtime |
| 237 | if converted.Codec == session.Codec { |
| 238 | runtime, _, err = stage.ContinueImportedSource(ctx, path, filepath.Join(converted.Root, converted.SessionID), headID) |
| 239 | } else { |
| 240 | runtime, _, err = stage.ContinuePrototype(ctx, filepath.Join(converted.Root, converted.SessionID)) |
| 241 | } |
| 242 | if err != nil { |
| 243 | return errors.Join(err, updateDesktopMigrationLedger(key, "", "failed", "conversion_read")) |
| 244 | } |
| 245 | if err := add(stage, runtime.Ref(), checkpoint, session.SessionOriginCanonicalImport); err != nil { |
| 246 | return err |
| 247 | } |
| 248 | } |
| 249 | if cp != nil { |
| 250 | stage, err := newStage() |
| 251 | if err != nil { |
| 252 | return err |
| 253 | } |
| 254 | runtime, _, err := stage.ContinueImported(ctx, path, headID) |
| 255 | if err != nil { |
| 256 | return err |
| 257 | } |
| 258 | if err := add(stage, runtime.Ref(), *cp, session.SessionOriginLegacyImport); err != nil { |
| 259 | return err |
| 260 | } |
| 261 | } |
| 262 | for _, node := range nodes { |
| 263 | if node.checkpoint.completed() { |
| 264 | source.conversionAdoptions = append(source.conversionAdoptions, &desktopMigrationReceipt{TargetSessionID: node.checkpoint.record.TargetSessionID, ContentDigest: node.checkpoint.record.ContentDigest}) |
| 265 | } |
| 266 | } |
| 267 | reduceDesktopMigrationLineage(nodes) |
| 268 | for i := range nodes { |
| 269 | if nodes[i].coveredBy >= 0 { |
| 270 | continue |
| 271 | } |
| 272 | if err := a.publishStagedMigration(ctx, source, nodes[i].checkpoint, nodes[i].service, nodes[i].ref, workspaceID, nodes[i].origin); err != nil { |
| 273 | return err |
| 274 | } |
| 275 | ledger, err := readDesktopMigrationLedger() |
| 276 | if err != nil { |
| 277 | return err |
| 278 | } |
| 279 | nodes[i].targetID = ledger.Records[nodes[i].checkpoint.key].TargetSessionID |
| 280 | } |
| 281 | for i := range nodes { |
| 282 | if nodes[i].coveredBy < 0 { |
| 283 | continue |
| 284 | } |
| 285 | winner := nodes[i].coveredBy |
| 286 | for nodes[winner].coveredBy >= 0 { |
| 287 | winner = nodes[winner].coveredBy |
| 288 | } |
| 289 | // Preserve an older receipt for a target that may already have been |
| 290 | // continued/deleted. Do not detach or resurrect that user's target. |
| 291 | targetID := nodes[winner].targetID |
| 292 | if nodes[i].checkpoint.matchesCompletedContent(nodes[i].digest) { |
| 293 | targetID = nodes[i].checkpoint.record.TargetSessionID |
| 294 | } |
| 295 | if err := a.completeRegisteredMigration(ctx, source, nodes[i].checkpoint, targetID, nodes[i].digest); err != nil { |
| 296 | return err |
| 297 | } |
| 298 | } |
| 299 | return nil |
| 300 | } |
| 301 | |
| 302 | // Select maximal histories within an already-proven lineage. Equal histories |
| 303 | // prefer the earlier (more recently converted) node; prefix edges cannot cycle. |
| 304 | func reduceDesktopMigrationLineage(nodes []desktopMigrationStagedNode) { |
| 305 | for i := range nodes { |
| 306 | for j := range nodes { |
| 307 | if i == j || !session.MigrationHistoryContains(nodes[j].messages, nodes[i].messages) { |
| 308 | continue |
| 309 | } |
| 310 | if session.MigrationHistoryContains(nodes[i].messages, nodes[j].messages) && j > i { |
| 311 | continue |
| 312 | } |
| 313 | nodes[i].coveredBy = j |
| 314 | break |
| 315 | } |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | // Stored-only chains (for example native v3 -> v4 with both directories left |
| 320 | // behind) use the same reduction even when no JSONL source remains on disk. |
| 321 | func (a *App) migrateStoredConversionLineages(ctx context.Context, conversions map[string][]desktopMigrationConversion, sources map[string]*desktopMigrationSource, handled map[string]bool) error { |
| 322 | var joined error |
| 323 | for path, candidates := range conversions { |
| 324 | remaining := []desktopMigrationConversion{} |
| 325 | for _, candidate := range candidates { |
| 326 | if handled[canonicalRuntimeRoot(filepath.Join(candidate.Root, candidate.SessionID))] { |
| 327 | continue |
| 328 | } |
| 329 | owner := sources[canonicalRuntimeRoot(candidate.Root)] |
| 330 | if owner != nil && owner.pairedIDs[candidate.SessionID] { |
| 331 | continue |
| 332 | } |
| 333 | remaining = append(remaining, candidate) |
| 334 | } |
| 335 | if len(remaining) < 2 { |
| 336 | continue |
| 337 | } |
| 338 | // Head recovery can require replaying an archived DAG. Completed |
| 339 | // stored-only chains must bypass that work just like live legacy files. |
| 340 | ledger, err := readDesktopMigrationLedger() |
| 341 | if err != nil { |
| 342 | return errors.Join(joined, err) |
| 343 | } |
| 344 | allUnchanged := true |
| 345 | for _, candidate := range remaining { |
| 346 | cp, err := newDesktopMigrationCheckpoint(desktopMigrationSource{records: ledger.Records}, desktopCanonicalMigrationKey(candidate.Root, candidate.SessionID), canonicalMigrationSourceFiles(candidate.Root, candidate.SessionID)) |
| 347 | if err != nil || !cp.unchanged() { |
| 348 | allUnchanged = false |
| 349 | break |
| 350 | } |
| 351 | if err := cp.skip(); err != nil { |
| 352 | joined = errors.Join(joined, err) |
| 353 | allUnchanged = false |
| 354 | break |
| 355 | } |
| 356 | } |
| 357 | if allUnchanged { |
| 358 | for _, candidate := range remaining { |
| 359 | handled[canonicalRuntimeRoot(filepath.Join(candidate.Root, candidate.SessionID))] = true |
| 360 | } |
| 361 | continue |
| 362 | } |
| 363 | resolved, err := resolveDesktopConversionHeads(ctx, path, remaining) |
| 364 | if err != nil { |
| 365 | joined = errors.Join(joined, err) |
| 366 | for _, candidate := range remaining { |
| 367 | handled[canonicalRuntimeRoot(filepath.Join(candidate.Root, candidate.SessionID))] = true |
| 368 | joined = errors.Join(joined, updateDesktopMigrationLedger(desktopCanonicalMigrationKey(candidate.Root, candidate.SessionID), "", "failed", "conversion_heads")) |
| 369 | } |
| 370 | continue |
| 371 | } |
| 372 | groups := map[string][]desktopMigrationConversion{} |
| 373 | for _, candidate := range resolved { |
| 374 | groups[candidate.HeadID] = append(groups[candidate.HeadID], candidate) |
| 375 | } |
| 376 | for _, group := range groups { |
| 377 | if len(group) < 2 { |
| 378 | continue |
| 379 | } |
| 380 | owner := sources[canonicalRuntimeRoot(group[0].Root)] |
| 381 | if owner == nil { |
| 382 | continue |
| 383 | } |
| 384 | source := *owner |
| 385 | source.headConversions = group |
| 386 | ledger, err := readDesktopMigrationLedger() |
| 387 | if err != nil { |
| 388 | return errors.Join(joined, err) |
| 389 | } |
| 390 | source.records = ledger.Records |
| 391 | unchanged := true |
| 392 | for _, candidate := range group { |
| 393 | handled[canonicalRuntimeRoot(filepath.Join(candidate.Root, candidate.SessionID))] = true |
| 394 | cp, err := newDesktopMigrationCheckpoint(source, desktopCanonicalMigrationKey(candidate.Root, candidate.SessionID), canonicalMigrationSourceFiles(candidate.Root, candidate.SessionID)) |
| 395 | if err != nil { |
| 396 | joined = errors.Join(joined, err) |
| 397 | unchanged = false |
| 398 | continue |
| 399 | } |
| 400 | if !cp.unchanged() { |
| 401 | unchanged = false |
| 402 | } else if err := cp.skip(); err != nil { |
| 403 | joined = errors.Join(joined, err) |
| 404 | unchanged = false |
| 405 | } |
| 406 | } |
| 407 | if unchanged { |
| 408 | continue |
| 409 | } |
| 410 | if err := a.migrateConversionLineage(ctx, "", "", source, nil, ""); err != nil { |
| 411 | joined = errors.Join(joined, err) |
| 412 | } |
| 413 | } |
| 414 | } |
| 415 | return joined |
| 416 | } |
| 417 |