{
  "version": 3,
  "sources": ["../../src/git-backend.ts", "../../src/git-runner.ts", "../../src/git-storage.ts"],
  "sourcesContent": ["import { createHash, randomUUID } from \"node:crypto\";\nimport fs from \"node:fs/promises\";\nimport path from \"node:path\";\nimport {\n\tnormalizeGitBranch,\n\tnormalizeGitDirectory,\n\tnormalizeGitRemote,\n\tnormalizeGitRemoteIdentity,\n\tvalidateGitNamespace,\n} from \"./git-config.js\";\nimport { GitCommandError, readGitBlobs, runGit } from \"./git-runner.js\";\nimport {\n\tGIT_MANIFEST_VERSION,\n\ttype GitManifest,\n\tMAX_GIT_MANIFEST_BYTES,\n\tMAX_GIT_TREE_OUTPUT_BYTES,\n\ttype PreparedGitFile,\n\tparseGitTree,\n\tprepareGitSnapshot,\n\trequireGitManifest,\n\tvalidateGitPublicationTree,\n\tvalidateGitSnapshot,\n} from \"./git-storage.js\";\nimport { posixJoin } from \"./paths.js\";\nimport { stateDir } from \"./state-directory.js\";\nimport {\n\ttype BackendDiagnostic,\n\ttype ExpectedRemoteHead,\n\ttype PublishSnapshotOptions,\n\ttype PublishSnapshotResult,\n\ttype RemoteHead,\n\ttype RemoteHistoryEntry,\n\ttype SyncBackend,\n\tSyncBackendConflictError,\n\tSyncBackendPublicationOutcomeUnknownError,\n} from \"./sync-backend.js\";\nimport type { ResolvedGitBackend, Snapshot, SnapshotFile } from \"./types.js\";\n\nconst COMMAND_TIMEOUT_MS = 30_000;\nconst POST_COMMIT_TIMEOUT_MS = 45_000;\nconst gitCacheMutationQueues = new Map<string, Promise<void>>();\n\nexport interface GitBackendOptions {\n\tcacheRoot?: string;\n\tallowLocalRemotes?: boolean;\n\tcommandTimeoutMs?: number;\n\tpostCommitTimeoutMs?: number;\n\t/** Deterministic fault injection used only by the local backend test suite. */\n\tafterPushForTest?: () => void | Promise<void>;\n\tafterLsRemoteForTest?: () => void | Promise<void>;\n\tafterPayloadWriteForTest?: () => void | Promise<void>;\n}\n\nexport class GitSyncBackend implements SyncBackend {\n\treadonly identity: string;\n\treadonly destination: string;\n\treadonly capability = \"lease-protected\" as const;\n\tprivate readonly cacheRoot: string;\n\tprivate readonly cacheDir: string;\n\tprivate readonly allowLocalRemotes: boolean;\n\tprivate readonly commandTimeoutMs: number;\n\tprivate readonly postCommitTimeoutMs: number;\n\tprivate readonly afterPushForTest?: () => void | Promise<void>;\n\tprivate readonly afterLsRemoteForTest?: () => void | Promise<void>;\n\tprivate readonly afterPayloadWriteForTest?: () => void | Promise<void>;\n\tprivate cacheReady?: Promise<void>;\n\n\tconstructor(\n\t\tprivate readonly config: ResolvedGitBackend,\n\t\toptions: GitBackendOptions = {},\n\t) {\n\t\tassertGitDestination(config);\n\t\tthis.allowLocalRemotes = options.allowLocalRemotes === true;\n\t\tif (!this.allowLocalRemotes) assertProductionRemote(config.profile.remote);\n\t\tthis.identity = gitBackendIdentity(config);\n\t\tthis.destination = gitDestination(config);\n\t\tthis.cacheRoot = options.cacheRoot ?? path.join(stateDir(), \"git\");\n\t\tthis.cacheDir = path.join(this.cacheRoot, this.identity.slice(\"git:\".length), \"repository.git\");\n\t\tthis.commandTimeoutMs = options.commandTimeoutMs ?? COMMAND_TIMEOUT_MS;\n\t\tthis.postCommitTimeoutMs = options.postCommitTimeoutMs ?? POST_COMMIT_TIMEOUT_MS;\n\t\tthis.afterPushForTest = options.afterPushForTest;\n\t\tthis.afterLsRemoteForTest = options.afterLsRemoteForTest;\n\t\tthis.afterPayloadWriteForTest = options.afterPayloadWriteForTest;\n\t}\n\n\tsameRevision(left: string, right: string) {\n\t\treturn decodeRevision(left, this.identity) === decodeRevision(right, this.identity);\n\t}\n\n\tasync readHead(signal?: AbortSignal): Promise<RemoteHead | undefined> {\n\t\tconst sha = await this.fetchRemoteHead(signal);\n\t\tif (!sha) return undefined;\n\t\tconst { manifest } = await this.readPublication(sha, signal);\n\t\treturn remoteHead(sha, manifest, this.identity);\n\t}\n\n\tasync readSnapshot(reference: string, signal?: AbortSignal): Promise<Snapshot> {\n\t\tconst head = await this.fetchRemoteHead(signal);\n\t\tif (!head) throw new Error(`Git snapshot publication was not found: ${reference}`);\n\t\tconst commit = await this.resolveSnapshotReference(reference, head, signal);\n\t\ttry {\n\t\t\tawait this.git([\"cat-file\", \"-e\", `${commit}^{commit}`], { signal });\n\t\t\tawait this.git([\"merge-base\", \"--is-ancestor\", commit, head], { signal });\n\t\t} catch (error) {\n\t\t\tthrow new Error(`Git snapshot publication was not found: ${reference}`, { cause: error });\n\t\t}\n\t\tconst { manifest, payloadEntries } = await this.readPublication(commit, signal);\n\t\tlet blobs: Buffer[];\n\t\ttry {\n\t\t\tblobs = await readGitBlobs(\n\t\t\t\tpayloadEntries.map((entry) => entry.object),\n\t\t\t\t{\n\t\t\t\t\tgitDir: this.cacheDir,\n\t\t\t\t\tsignal,\n\t\t\t\t\ttimeoutMs: this.commandTimeoutMs,\n\t\t\t\t\tallowFileProtocol: this.allowLocalRemotes,\n\t\t\t\t\tmaxOutputBytes: manifest.files.reduce((total, file) => total + file.size, 0),\n\t\t\t\t},\n\t\t\t);\n\t\t} catch (error) {\n\t\t\tif (error instanceof Error && /exceeds/u.test(error.message)) {\n\t\t\t\tthrow new Error(\"Git snapshot file content exceeds its manifest size.\", { cause: error });\n\t\t\t}\n\t\t\tthrow this.redactedError(error);\n\t\t}\n\t\tthrowIfAborted(signal);\n\t\tconst files: SnapshotFile[] = manifest.files.map((file, index) => {\n\t\t\tconst content = blobs[index];\n\t\t\tif (!content || content.byteLength !== file.size || sha256(content) !== file.sha256) {\n\t\t\t\tthrow new Error(`Git snapshot file checksum or size mismatch: ${file.path}`);\n\t\t\t}\n\t\t\treturn { path: file.path, contentBase64: content.toString(\"base64\"), sha256: file.sha256 };\n\t\t});\n\t\tconst snapshot: Snapshot = {\n\t\t\tversion: manifest.snapshotVersion,\n\t\t\tid: manifest.snapshotId,\n\t\t\tcreatedAt: manifest.createdAt,\n\t\t\tmachine: manifest.machine,\n\t\t\tprofile: manifest.profile,\n\t\t\t...(manifest.snapshotSyncSessions === undefined\n\t\t\t\t? {}\n\t\t\t\t: { syncSessions: manifest.snapshotSyncSessions }),\n\t\t\t...(manifest.selection === undefined ? {} : { selection: manifest.selection }),\n\t\t\tfiles,\n\t\t};\n\t\tvalidateGitSnapshot(snapshot, manifest, this.config.destination.namespace);\n\t\treturn snapshot;\n\t}\n\n\tasync publishSnapshot(\n\t\tsnapshot: Snapshot,\n\t\texpected: ExpectedRemoteHead,\n\t\toptions: PublishSnapshotOptions = {},\n\t): Promise<PublishSnapshotResult> {\n\t\tthrowIfAborted(options.signal);\n\t\tconst files = prepareGitSnapshot(snapshot, this.config.destination.namespace);\n\t\tconst observed = await this.fetchRemoteHead(options.signal);\n\t\tif (!matchesExpected(observed, expected, this.identity)) {\n\t\t\tthrow new SyncBackendConflictError(\n\t\t\t\t\"Git remote changed while preparing publication. Run /sync status and retry.\",\n\t\t\t\t{ currentHead: observed ? await this.headForSha(observed, options.signal) : undefined },\n\t\t\t);\n\t\t}\n\t\tthrowIfAborted(options.signal);\n\t\tconst manifest: GitManifest = {\n\t\t\tversion: GIT_MANIFEST_VERSION,\n\t\t\tsnapshotVersion: snapshot.version,\n\t\t\tsnapshotId: snapshot.id,\n\t\t\tcreatedAt: snapshot.createdAt,\n\t\t\tmachine: snapshot.machine,\n\t\t\tprofile: snapshot.profile,\n\t\t\tsyncSessions:\n\t\t\t\tsnapshot.syncSessions === true ||\n\t\t\t\tsnapshot.files.some((file) => file.path.startsWith(\"sessions/\")),\n\t\t\t...(snapshot.syncSessions === undefined\n\t\t\t\t? {}\n\t\t\t\t: { snapshotSyncSessions: snapshot.syncSessions }),\n\t\t\t...(snapshot.selection === undefined ? {} : { selection: snapshot.selection }),\n\t\t\tfiles: files.map(({ path: filePath, sha256: fileSha, size }) => ({\n\t\t\t\tpath: filePath,\n\t\t\t\tsha256: fileSha,\n\t\t\t\tsize,\n\t\t\t})),\n\t\t};\n\t\tlet candidate: string;\n\t\ttry {\n\t\t\tcandidate = await this.createCommit(snapshot, files, manifest, observed, options.signal);\n\t\t} catch (error) {\n\t\t\tthrow this.redactedError(error);\n\t\t}\n\t\tthrowIfAborted(options.signal);\n\t\toptions.onCommit?.();\n\n\t\tconst ref = this.remoteRef();\n\t\tconst lease = `--force-with-lease=${ref}:${observed ?? \"\"}`;\n\t\tlet pushError: unknown;\n\t\ttry {\n\t\t\tawait this.git(\n\t\t\t\t[\n\t\t\t\t\t\"push\",\n\t\t\t\t\t\"--porcelain\",\n\t\t\t\t\t\"--no-verify\",\n\t\t\t\t\tlease,\n\t\t\t\t\tthis.config.profile.remote,\n\t\t\t\t\t`${candidate}:${ref}`,\n\t\t\t\t],\n\t\t\t\t{ timeoutMs: this.postCommitTimeoutMs },\n\t\t\t);\n\t\t\tawait this.afterPushForTest?.();\n\t\t} catch (error) {\n\t\t\tpushError = error;\n\t\t}\n\n\t\tlet current: string | undefined;\n\t\ttry {\n\t\t\tcurrent = await this.fetchRemoteHead(AbortSignal.timeout(this.postCommitTimeoutMs));\n\t\t} catch (error) {\n\t\t\tthrow new SyncBackendPublicationOutcomeUnknownError(\n\t\t\t\t`Git publication outcome is unknown: ${this.safeError(pushError ?? error)}`,\n\t\t\t\t{ cause: pushError ?? error },\n\t\t\t);\n\t\t}\n\t\tif (current !== candidate) {\n\t\t\tif (pushError && current === observed) {\n\t\t\t\tthrow new Error(\n\t\t\t\t\t`Git publication failed without updating the owned branch: ${this.safeError(pushError)}`,\n\t\t\t\t\t{\n\t\t\t\t\t\tcause: pushError,\n\t\t\t\t\t},\n\t\t\t\t);\n\t\t\t}\n\t\t\tthrow new SyncBackendConflictError(\n\t\t\t\tpushError\n\t\t\t\t\t? `Git publication lease was rejected: ${this.safeError(pushError)}`\n\t\t\t\t\t: \"Git remote changed immediately after publication.\",\n\t\t\t\t{\n\t\t\t\t\tphase: \"after-commit\",\n\t\t\t\t\tcurrentHead: current ? await this.headForSha(current) : undefined,\n\t\t\t\t\tcandidateMayHaveBeenActive: true,\n\t\t\t\t\tcause: pushError instanceof Error ? pushError : undefined,\n\t\t\t\t},\n\t\t\t);\n\t\t}\n\t\tconst head = await this.headForSha(candidate);\n\t\treturn { head, warnings: [] };\n\t}\n\n\tasync listHistory(signal?: AbortSignal): Promise<RemoteHistoryEntry[]> {\n\t\tconst sha = await this.fetchRemoteHead(signal);\n\t\tif (!sha) return [];\n\t\tconst result = await this.git(\n\t\t\t[\"rev-list\", \"--first-parent\", \"--reverse\", \"--max-count=100\", sha],\n\t\t\t{ signal },\n\t\t);\n\t\tconst commits = result.stdout.toString(\"utf8\").trim().split(\"\\n\").filter(Boolean);\n\t\tconst entries: RemoteHistoryEntry[] = [];\n\t\tfor (const commit of commits) {\n\t\t\tconst { manifest } = await this.readPublication(commit, signal);\n\t\t\tentries.push({\n\t\t\t\tsnapshotRef: commit,\n\t\t\t\tsnapshotId: manifest.snapshotId,\n\t\t\t\tcreatedAt: manifest.createdAt,\n\t\t\t\tmachine: manifest.machine,\n\t\t\t\tsyncSessions: manifest.syncSessions,\n\t\t\t});\n\t\t}\n\t\treturn entries;\n\t}\n\n\tasync diagnose(signal?: AbortSignal): Promise<BackendDiagnostic[]> {\n\t\tconst diagnostics: BackendDiagnostic[] = [];\n\t\ttry {\n\t\t\tconst version = await runGit([\"--version\"], {\n\t\t\t\tsignal,\n\t\t\t\ttimeoutMs: this.commandTimeoutMs,\n\t\t\t});\n\t\t\tconst versionText = version.stdout.toString(\"utf8\").trim();\n\t\t\tconst supported = isSupportedGitVersion(versionText);\n\t\t\tdiagnostics.push({\n\t\t\t\tkey: \"git-version\",\n\t\t\t\tlevel: supported ? \"info\" : \"error\",\n\t\t\t\tmessage: supported\n\t\t\t\t\t? versionText\n\t\t\t\t\t: `${versionText || \"unknown Git version\"}; pi-sync requires Git 2.30 or newer`,\n\t\t\t});\n\t\t} catch (error) {\n\t\t\treturn [{ key: \"git-version\", level: \"error\", message: this.safeError(error) }];\n\t\t}\n\t\ttry {\n\t\t\tconst head = await this.readHead(signal);\n\t\t\tif (head) await this.readSnapshot(head.snapshotRef, signal);\n\t\t\tdiagnostics.push({\n\t\t\t\tkey: \"git-remote\",\n\t\t\t\tlevel: \"info\",\n\t\t\t\tmessage: head\n\t\t\t\t\t? `git remote: reachable; owned branch ${this.config.destination.branch} is valid`\n\t\t\t\t\t: `git remote: reachable; owned branch ${this.config.destination.branch} is not created yet`,\n\t\t\t});\n\t\t\tdiagnostics.push({\n\t\t\t\tkey: \"git-cache\",\n\t\t\t\tlevel: \"info\",\n\t\t\t\tmessage: \"git cache: private bare repository is healthy\",\n\t\t\t});\n\t\t} catch (error) {\n\t\t\tdiagnostics.push({\n\t\t\t\tkey: \"git-remote\",\n\t\t\t\tlevel: \"error\",\n\t\t\t\tmessage: `git remote: ${this.safeError(error)}`,\n\t\t\t});\n\t\t}\n\t\treturn diagnostics;\n\t}\n\n\tprivate async resolveSnapshotReference(reference: string, head: string, signal?: AbortSignal) {\n\t\tif (isCommitSha(reference) || /^[0-9a-f]{64}$/u.test(reference)) {\n\t\t\trequireCommitSha(reference);\n\t\t\treturn reference;\n\t\t}\n\t\tif (!reference || reference.length > 512 || !/^[A-Za-z0-9._-]+$/u.test(reference)) {\n\t\t\tthrow new Error(\"Invalid Git publication reference.\");\n\t\t}\n\t\tconst result = await this.git([\"rev-list\", \"--first-parent\", \"--max-count=100\", head], {\n\t\t\tsignal,\n\t\t});\n\t\tconst commits = result.stdout.toString(\"utf8\").trim().split(\"\\n\").filter(Boolean);\n\t\tconst matches: string[] = [];\n\t\tfor (const commit of commits) {\n\t\t\tconst { manifest } = await this.readPublication(commit, signal);\n\t\t\tif (manifest.snapshotId === reference) matches.push(commit);\n\t\t}\n\t\tif (matches.length === 0) {\n\t\t\tthrow new Error(`Git snapshot publication was not found: ${reference}`);\n\t\t}\n\t\tif (matches.length > 1) {\n\t\t\tthrow new Error(\n\t\t\t\t`Git snapshot id is ambiguous; use a commit reference from /sync history: ${reference}`,\n\t\t\t);\n\t\t}\n\t\treturn matches[0] as string;\n\t}\n\n\tprivate async headForSha(sha: string, signal?: AbortSignal) {\n\t\tconst { manifest } = await this.readPublication(sha, signal);\n\t\treturn remoteHead(sha, manifest, this.identity);\n\t}\n\n\tprivate async fetchRemoteHead(signal?: AbortSignal) {\n\t\tawait this.ensureCache(signal);\n\t\tconst result = await this.git(\n\t\t\t[\"ls-remote\", \"--refs\", this.config.profile.remote, this.remoteRef()],\n\t\t\t{ signal },\n\t\t);\n\t\tconst line = result.stdout.toString(\"utf8\").trim();\n\t\tif (!line) return undefined;\n\t\tconst [sha, ref, ...extra] = line.split(/\\s+/u);\n\t\tif (extra.length > 0 || ref !== this.remoteRef() || !sha) {\n\t\t\tthrow new Error(\"Git remote returned a malformed owned-ref response.\");\n\t\t}\n\t\trequireCommitSha(sha);\n\t\tawait this.afterLsRemoteForTest?.();\n\t\treturn withGitCacheMutation(\n\t\t\tthis.cacheDir,\n\t\t\tasync () => {\n\t\t\t\tconst localRef = `refs/pisync/fetch/${process.pid}-${randomUUID()}`;\n\t\t\t\ttry {\n\t\t\t\t\tawait this.git(\n\t\t\t\t\t\t[\n\t\t\t\t\t\t\t\"fetch\",\n\t\t\t\t\t\t\t\"--no-tags\",\n\t\t\t\t\t\t\t\"--force\",\n\t\t\t\t\t\t\tthis.config.profile.remote,\n\t\t\t\t\t\t\t`${this.remoteRef()}:${localRef}`,\n\t\t\t\t\t\t],\n\t\t\t\t\t\t{ signal },\n\t\t\t\t\t);\n\t\t\t\t\tconst fetched = (await this.git([\"rev-parse\", \"--verify\", localRef], { signal })).stdout\n\t\t\t\t\t\t.toString(\"utf8\")\n\t\t\t\t\t\t.trim();\n\t\t\t\t\trequireCommitSha(fetched);\n\t\t\t\t\treturn fetched;\n\t\t\t\t} finally {\n\t\t\t\t\tawait this.git([\"update-ref\", \"-d\", localRef], { timeoutMs: 5_000 }).catch(\n\t\t\t\t\t\t() => undefined,\n\t\t\t\t\t);\n\t\t\t\t}\n\t\t\t},\n\t\t\tsignal,\n\t\t);\n\t}\n\n\tprivate async readManifest(commit: string, signal?: AbortSignal): Promise<GitManifest> {\n\t\trequireCommitSha(commit);\n\t\tconst bytes = await this.showFile(commit, this.manifestPath(), signal, MAX_GIT_MANIFEST_BYTES);\n\t\tlet parsed: unknown;\n\t\ttry {\n\t\t\tparsed = JSON.parse(bytes.toString(\"utf8\"));\n\t\t} catch (error) {\n\t\t\tthrow new Error(\"Git publication manifest is malformed.\", { cause: error });\n\t\t}\n\t\treturn requireGitManifest(parsed);\n\t}\n\n\tprivate showFile(\n\t\tcommit: string,\n\t\tfilePath: string,\n\t\tsignal?: AbortSignal,\n\t\tmaxOutputBytes?: number,\n\t) {\n\t\treturn this.git([\"show\", `${commit}:${filePath}`], { signal, maxOutputBytes }).then(\n\t\t\t(result) => result.stdout,\n\t\t);\n\t}\n\n\tprivate async createCommit(\n\t\tsnapshot: Snapshot,\n\t\tfiles: PreparedGitFile[],\n\t\tmanifest: GitManifest,\n\t\tparent: string | undefined,\n\t\tsignal?: AbortSignal,\n\t) {\n\t\tconst manifestBytes = Buffer.from(`${JSON.stringify(manifest)}\\n`, \"utf8\");\n\t\tif (manifestBytes.byteLength > MAX_GIT_MANIFEST_BYTES) {\n\t\t\tthrow new Error(`Git publication manifest exceeds the ${MAX_GIT_MANIFEST_BYTES}-byte limit.`);\n\t\t}\n\t\tawait this.ensureCache(signal);\n\t\tconst temporaryDirectory = await fs.mkdtemp(path.join(path.dirname(this.cacheDir), \".index-\"));\n\t\tconst indexPath = path.join(temporaryDirectory, \"index\");\n\t\tconst payloadDirectory = path.join(temporaryDirectory, \"payloads\");\n\t\tconst env = { GIT_INDEX_FILE: indexPath };\n\t\ttry {\n\t\t\tawait fs.mkdir(payloadDirectory, { mode: 0o700 });\n\t\t\tconst uniqueFiles = [...new Map(files.map((file) => [file.sha256, file])).values()].sort(\n\t\t\t\t(left, right) => left.sha256.localeCompare(right.sha256),\n\t\t\t);\n\t\t\tfor (const file of uniqueFiles) {\n\t\t\t\tthrowIfAborted(signal);\n\t\t\t\tawait fs.writeFile(path.join(payloadDirectory, file.sha256), file.content, {\n\t\t\t\t\tflag: \"wx\",\n\t\t\t\t\tmode: 0o600,\n\t\t\t\t});\n\t\t\t}\n\t\t\tawait this.afterPayloadWriteForTest?.();\n\t\t\tthrowIfAborted(signal);\n\t\t\tconst hashed = await this.git([\"hash-object\", \"-w\", \"--no-filters\", \"--stdin-paths\"], {\n\t\t\t\tcwd: payloadDirectory,\n\t\t\t\tinput: uniqueFiles.map((file) => file.sha256).join(\"\\n\") + (uniqueFiles.length ? \"\\n\" : \"\"),\n\t\t\t\tsignal,\n\t\t\t\tmaxOutputBytes: Math.max(1024, uniqueFiles.length * 64),\n\t\t\t});\n\t\t\tconst objectIds = hashed.stdout.toString(\"utf8\").trim().split(\"\\n\").filter(Boolean);\n\t\t\tif (objectIds.length !== uniqueFiles.length || objectIds.some((id) => !isCommitSha(id))) {\n\t\t\t\tthrow new Error(\"Git hash-object returned a malformed payload response.\");\n\t\t\t}\n\t\t\tconst objectsBySha256 = new Map(\n\t\t\t\tuniqueFiles.map((file, index) => [file.sha256, objectIds[index] as string]),\n\t\t\t);\n\t\t\tconst manifestBlob = (\n\t\t\t\tawait this.git([\"hash-object\", \"-w\", \"--stdin\"], { input: manifestBytes, signal })\n\t\t\t).stdout\n\t\t\t\t.toString(\"utf8\")\n\t\t\t\t.trim();\n\t\t\tif (!isCommitSha(manifestBlob)) throw new Error(\"Git returned an invalid manifest blob id.\");\n\t\t\tawait this.git([\"read-tree\", \"--empty\"], { env, signal });\n\t\t\tconst indexLines = [\n\t\t\t\t`100644 ${manifestBlob}\\t${this.manifestPath()}`,\n\t\t\t\t...files.map((file) => {\n\t\t\t\t\tconst object = objectsBySha256.get(file.sha256);\n\t\t\t\t\tif (!object) throw new Error(\"Git payload object is missing after hashing.\");\n\t\t\t\t\treturn `100644 ${object}\\t${this.filePath(file.path)}`;\n\t\t\t\t}),\n\t\t\t];\n\t\t\tawait this.git([\"update-index\", \"-z\", \"--index-info\"], {\n\t\t\t\tenv,\n\t\t\t\tsignal,\n\t\t\t\tinput: Buffer.from(`${indexLines.join(\"\\0\")}\\0`, \"utf8\"),\n\t\t\t});\n\t\t\tconst tree = (await this.git([\"write-tree\"], { env, signal })).stdout.toString(\"utf8\").trim();\n\t\t\tconst date = Number.isNaN(Date.parse(snapshot.createdAt))\n\t\t\t\t? new Date().toISOString()\n\t\t\t\t: snapshot.createdAt;\n\t\t\tconst commit = await this.git(\n\t\t\t\t[\"commit-tree\", tree, ...(parent ? [\"-p\", parent] : []), \"-F\", \"-\"],\n\t\t\t\t{\n\t\t\t\t\tsignal,\n\t\t\t\t\tinput: `pi-sync snapshot ${snapshot.id}\\n`,\n\t\t\t\t\tenv: {\n\t\t\t\t\t\tGIT_AUTHOR_NAME: \"pi-sync\",\n\t\t\t\t\t\tGIT_AUTHOR_EMAIL: \"pi-sync@localhost\",\n\t\t\t\t\t\tGIT_COMMITTER_NAME: \"pi-sync\",\n\t\t\t\t\t\tGIT_COMMITTER_EMAIL: \"pi-sync@localhost\",\n\t\t\t\t\t\tGIT_AUTHOR_DATE: date,\n\t\t\t\t\t\tGIT_COMMITTER_DATE: date,\n\t\t\t\t\t},\n\t\t\t\t},\n\t\t\t);\n\t\t\tconst sha = commit.stdout.toString(\"utf8\").trim();\n\t\t\trequireCommitSha(sha);\n\t\t\treturn sha;\n\t\t} finally {\n\t\t\tawait fs.rm(temporaryDirectory, { recursive: true, force: true });\n\t\t}\n\t}\n\n\tprivate ensureCache(signal?: AbortSignal) {\n\t\tif (!this.cacheReady) {\n\t\t\tconst operation = withGitCacheMutation(\n\t\t\t\tthis.cacheDir,\n\t\t\t\t() => this.initializeCache(signal),\n\t\t\t\tsignal,\n\t\t\t);\n\t\t\tconst wrapped = operation.catch((error) => {\n\t\t\t\tif (this.cacheReady === wrapped) this.cacheReady = undefined;\n\t\t\t\tthrow this.redactedError(error);\n\t\t\t});\n\t\t\tthis.cacheReady = wrapped;\n\t\t}\n\t\treturn this.cacheReady;\n\t}\n\n\tprivate async initializeCache(signal?: AbortSignal) {\n\t\tconst version = await runGit([\"--version\"], {\n\t\t\tsignal,\n\t\t\ttimeoutMs: this.commandTimeoutMs,\n\t\t});\n\t\tconst versionText = version.stdout.toString(\"utf8\").trim();\n\t\tif (!isSupportedGitVersion(versionText)) {\n\t\t\tthrow new Error(\n\t\t\t\t`${versionText || \"Unknown Git version\"}; pi-sync requires Git 2.30 or newer.`,\n\t\t\t);\n\t\t}\n\t\tconst parent = path.dirname(this.cacheDir);\n\t\tconst cacheParent = path.dirname(this.cacheRoot);\n\t\tawait assertNotSymlink(cacheParent, \"Git cache parent\");\n\t\tawait assertNotSymlink(this.cacheRoot, \"Git cache root\");\n\t\tawait fs.mkdir(this.cacheRoot, { recursive: true, mode: 0o700 });\n\t\tawait assertNotSymlink(cacheParent, \"Git cache parent\");\n\t\tawait assertNotSymlink(this.cacheRoot, \"Git cache root\");\n\t\tawait assertNotSymlink(parent, \"Git cache identity directory\");\n\t\tawait fs.mkdir(parent, { recursive: true, mode: 0o700 });\n\t\tawait assertNotSymlink(parent, \"Git cache identity directory\");\n\t\tlet recreate = false;\n\t\ttry {\n\t\t\tconst stat = await fs.lstat(this.cacheDir);\n\t\t\tif (stat.isSymbolicLink()) throw new Error(\"Refusing symlinked Git cache.\");\n\t\t\tif (!stat.isDirectory()) recreate = true;\n\t\t\telse {\n\t\t\t\ttry {\n\t\t\t\t\trecreate = !(await this.cacheUsesSha1(signal));\n\t\t\t\t} catch {\n\t\t\t\t\trecreate = true;\n\t\t\t\t}\n\t\t\t}\n\t\t} catch (error) {\n\t\t\tif ((error as NodeJS.ErrnoException).code !== \"ENOENT\") throw error;\n\t\t}\n\t\tif (recreate) await fs.rm(this.cacheDir, { recursive: true, force: true });\n\t\ttry {\n\t\t\tawait fs.access(this.cacheDir);\n\t\t} catch {\n\t\t\ttry {\n\t\t\t\tawait runGit([\"init\", \"--bare\", \"--object-format=sha1\", this.cacheDir], {\n\t\t\t\t\tsignal,\n\t\t\t\t\ttimeoutMs: this.commandTimeoutMs,\n\t\t\t\t\tallowFileProtocol: this.allowLocalRemotes,\n\t\t\t\t});\n\t\t\t} catch (initError) {\n\t\t\t\tconst concurrent = await this.cacheUsesSha1(signal).catch(() => false);\n\t\t\t\tif (!concurrent) throw initError;\n\t\t\t}\n\t\t}\n\t\tif (process.platform !== \"win32\") await fs.chmod(parent, 0o700);\n\t}\n\n\tprivate async cacheUsesSha1(signal?: AbortSignal) {\n\t\tconst result = await this.git([\"rev-parse\", \"--is-bare-repository\", \"--show-object-format\"], {\n\t\t\tsignal,\n\t\t});\n\t\treturn result.stdout.toString(\"utf8\").trim() === \"true\\nsha1\";\n\t}\n\n\tprivate git(\n\t\targs: string[],\n\t\toptions: {\n\t\t\tcwd?: string;\n\t\t\tinput?: Buffer | string;\n\t\t\tenv?: NodeJS.ProcessEnv;\n\t\t\tsignal?: AbortSignal;\n\t\t\ttimeoutMs?: number;\n\t\t\tmaxOutputBytes?: number;\n\t\t} = {},\n\t) {\n\t\treturn runGit(args, {\n\t\t\tgitDir: this.cacheDir,\n\t\t\tallowFileProtocol: this.allowLocalRemotes,\n\t\t\ttimeoutMs: options.timeoutMs ?? this.commandTimeoutMs,\n\t\t\t...options,\n\t\t}).catch((error) => {\n\t\t\tthrow this.redactedError(error);\n\t\t});\n\t}\n\n\tprivate remoteRef() {\n\t\treturn `refs/heads/${this.config.destination.branch}`;\n\t}\n\n\tprivate publicationPath() {\n\t\treturn this.config.destination.directory;\n\t}\n\n\tprivate manifestPath() {\n\t\treturn posixJoin(this.publicationPath(), \"manifest.json\");\n\t}\n\n\tprivate filePath(filePath: string) {\n\t\treturn posixJoin(this.publicationPath(), \"files\", filePath);\n\t}\n\n\tprivate async readPublication(commit: string, signal?: AbortSignal) {\n\t\tconst manifest = await this.readManifest(commit, signal);\n\t\tconst entries = await this.readPublicationTree(commit, signal);\n\t\tconst payloadEntries = validateGitPublicationTree(\n\t\t\tentries,\n\t\t\tmanifest,\n\t\t\tthis.manifestPath(),\n\t\t\t(filePath) => this.filePath(filePath),\n\t\t);\n\t\treturn { manifest, payloadEntries };\n\t}\n\n\tprivate async readPublicationTree(commit: string, signal?: AbortSignal) {\n\t\tconst result = await this.git([\"ls-tree\", \"-r\", \"-z\", commit], {\n\t\t\tsignal,\n\t\t\tmaxOutputBytes: MAX_GIT_TREE_OUTPUT_BYTES,\n\t\t});\n\t\treturn parseGitTree(result.stdout);\n\t}\n\n\tprivate redactedError(error: unknown) {\n\t\tif (error instanceof Error && error.name === \"AbortError\") return error;\n\t\treturn new Error(this.safeError(error));\n\t}\n\n\tprivate safeError(error: unknown) {\n\t\tconst raw =\n\t\t\terror instanceof GitCommandError\n\t\t\t\t? error.stderr || error.message\n\t\t\t\t: error instanceof Error\n\t\t\t\t\t? error.message\n\t\t\t\t\t: String(error);\n\t\treturn redactGitError(raw, this.config.profile.remote, this.cacheDir);\n\t}\n}\n\nexport function gitBackendIdentity(config: ResolvedGitBackend) {\n\tlet remoteIdentity: string;\n\ttry {\n\t\tremoteIdentity = normalizeGitRemoteIdentity(config.profile.remote);\n\t} catch {\n\t\tremoteIdentity = config.profile.remote;\n\t}\n\tconst canonical = JSON.stringify([\n\t\tremoteIdentity,\n\t\tconfig.destination.branch,\n\t\tconfig.destination.directory,\n\t]);\n\treturn `git:${sha256(Buffer.from(canonical))}`;\n}\n\nfunction gitDestination(config: ResolvedGitBackend) {\n\tlet host = \"Git remote\";\n\tconst remote = config.profile.remote;\n\tif (remote.includes(\"://\")) {\n\t\ttry {\n\t\t\thost = new URL(remote).host;\n\t\t} catch {\n\t\t\thost = \"Git remote\";\n\t\t}\n\t} else {\n\t\tconst match = /^(?:[^@]+@)?(?<host>\\[[^\\]]+\\]|[^:]+):/u.exec(remote);\n\t\tif (match?.groups?.host) host = match.groups.host;\n\t}\n\treturn `${host} \u00B7 ${config.destination.branch}:${config.destination.directory}`;\n}\n\nfunction remoteHead(sha: string, manifest: GitManifest, identity: string): RemoteHead {\n\treturn {\n\t\tsnapshotRef: sha,\n\t\tsnapshotId: manifest.snapshotId,\n\t\trevision: `${identity}:${sha}`,\n\t\tcreatedAt: manifest.createdAt,\n\t\tmachine: manifest.machine,\n\t\tsyncSessions: manifest.syncSessions,\n\t\t...(manifest.selection === undefined ? {} : { selection: manifest.selection }),\n\t};\n}\n\nfunction matchesExpected(\n\tcurrent: string | undefined,\n\texpected: ExpectedRemoteHead,\n\tidentity: string,\n) {\n\tif (expected.kind === \"missing\") return current === undefined;\n\ttry {\n\t\treturn current === decodeRevision(expected.revision, identity);\n\t} catch {\n\t\treturn false;\n\t}\n}\n\nfunction decodeRevision(revision: string, identity: string) {\n\tconst prefix = `${identity}:`;\n\tconst sha = revision.startsWith(prefix) ? revision.slice(prefix.length) : \"\";\n\tif (!/^[0-9a-f]{40}$/u.test(sha)) throw new Error(\"Invalid Git remote revision.\");\n\treturn sha;\n}\n\nfunction isCommitSha(value: string) {\n\treturn /^[0-9a-f]{40}$/u.test(value);\n}\n\nfunction requireCommitSha(value: string) {\n\tif (/^[0-9a-f]{64}$/u.test(value)) {\n\t\tthrow new Error(\"Unsupported Git SHA-256 repository; pi-sync currently requires SHA-1 refs.\");\n\t}\n\tif (!/^[0-9a-f]{40}$/u.test(value)) throw new Error(\"Invalid Git publication reference.\");\n}\n\nexport function isSupportedGitVersion(value: string) {\n\tconst match = /git version (\\d+)\\.(\\d+)/u.exec(value);\n\tif (!match) return false;\n\tconst major = Number(match[1]);\n\tconst minor = Number(match[2]);\n\treturn major > 2 || (major === 2 && minor >= 30);\n}\n\nfunction assertGitDestination(config: ResolvedGitBackend) {\n\ttry {\n\t\tif (\n\t\t\tnormalizeGitBranch(config.destination.branch) !== config.destination.branch ||\n\t\t\tnormalizeGitDirectory(config.destination.directory) !== config.destination.directory\n\t\t) {\n\t\t\tthrow new Error(\"Git storage location is not normalized.\");\n\t\t}\n\t\tvalidateGitNamespace(config.destination.namespace);\n\t} catch (error) {\n\t\tthrow new Error(\"Invalid Git storage location.\", { cause: error });\n\t}\n}\n\nfunction assertProductionRemote(remote: string) {\n\tlet normalized: string | undefined;\n\ttry {\n\t\tnormalized = normalizeGitRemote(remote);\n\t} catch (error) {\n\t\tthrow new Error(error instanceof Error ? error.message : \"Invalid Git remote.\", {\n\t\t\tcause: error,\n\t\t});\n\t}\n\tif (!normalized || normalized !== remote)\n\t\tthrow new Error(\"Invalid or non-normalized Git remote.\");\n}\n\nasync function withGitCacheMutation<T>(\n\tcacheDir: string,\n\trun: () => Promise<T>,\n\tsignal?: AbortSignal,\n): Promise<T> {\n\tconst previous = gitCacheMutationQueues.get(cacheDir) ?? Promise.resolve();\n\tconst operation = previous\n\t\t.catch(() => undefined)\n\t\t.then(() => {\n\t\t\tthrowIfAborted(signal);\n\t\t\treturn run();\n\t\t});\n\tconst tail = operation.then(\n\t\t() => undefined,\n\t\t() => undefined,\n\t);\n\tgitCacheMutationQueues.set(cacheDir, tail);\n\tvoid tail.then(() => {\n\t\tif (gitCacheMutationQueues.get(cacheDir) === tail) gitCacheMutationQueues.delete(cacheDir);\n\t});\n\tif (!signal) return operation;\n\tthrowIfAborted(signal);\n\tlet rejectAbort: ((reason: unknown) => void) | undefined;\n\tconst aborted = new Promise<never>((_resolve, reject) => {\n\t\trejectAbort = reject;\n\t});\n\tconst onAbort = () => rejectAbort?.(abortReason(signal));\n\tsignal.addEventListener(\"abort\", onAbort, { once: true });\n\tif (signal.aborted) onAbort();\n\ttry {\n\t\treturn await Promise.race([operation, aborted]);\n\t} finally {\n\t\tsignal.removeEventListener(\"abort\", onAbort);\n\t}\n}\n\nasync function assertNotSymlink(target: string, label: string) {\n\ttry {\n\t\tconst stat = await fs.lstat(target);\n\t\tif (stat.isSymbolicLink()) throw new Error(`Refusing symlinked ${label}.`);\n\t} catch (error) {\n\t\tif ((error as NodeJS.ErrnoException).code !== \"ENOENT\") throw error;\n\t}\n}\n\nfunction redactGitError(value: string, remote: string, cacheDir: string) {\n\treturn (\n\t\tvalue\n\t\t\t.replaceAll(remote, \"<git-remote>\")\n\t\t\t.replaceAll(cacheDir, \"<git-cache>\")\n\t\t\t.replace(/https:\\/\\/[^/@\\s]+@/gu, \"https://<credentials>@\")\n\t\t\t.replace(/\\b(password|token|authorization)=\\S+/giu, \"$1=<redacted>\")\n\t\t\t.replace(/\\bBearer\\s+\\S+/giu, \"Bearer <redacted>\")\n\t\t\t// biome-ignore lint/suspicious/noControlCharactersInRegex: sanitize untrusted process output.\n\t\t\t.replace(/[\\u0000-\\u001f\\u007f-\\u009f]/gu, \" \")\n\t\t\t.trim()\n\t\t\t.slice(0, 4096)\n\t);\n}\n\nfunction sha256(value: Buffer) {\n\treturn createHash(\"sha256\").update(value).digest(\"hex\");\n}\n\nfunction abortReason(signal: AbortSignal) {\n\treturn signal.reason instanceof Error\n\t\t? signal.reason\n\t\t: new DOMException(\"The operation was aborted\", \"AbortError\");\n}\n\nfunction throwIfAborted(signal?: AbortSignal) {\n\tif (signal?.aborted) throw abortReason(signal);\n}\n", "import { spawn } from \"node:child_process\";\nimport process from \"node:process\";\n\nconst DEFAULT_TIMEOUT_MS = 30_000;\nconst DEFAULT_OUTPUT_LIMIT = 1024 * 1024;\n\nexport interface GitRunOptions {\n\tgitDir?: string;\n\tcwd?: string;\n\tinput?: Buffer | string;\n\tenv?: NodeJS.ProcessEnv;\n\tsignal?: AbortSignal;\n\ttimeoutMs?: number;\n\tmaxOutputBytes?: number;\n\tallowFileProtocol?: boolean;\n}\n\nexport interface GitRunResult {\n\tstdout: Buffer;\n\tstderr: Buffer;\n}\n\nexport class GitCommandError extends Error {\n\treadonly code = \"GIT_COMMAND_FAILED\";\n\tconstructor(\n\t\tmessage: string,\n\t\treadonly exitCode: number | null,\n\t\treadonly stderr: string,\n\t\toptions?: ErrorOptions,\n\t) {\n\t\tsuper(message, options);\n\t\tthis.name = \"GitCommandError\";\n\t}\n}\n\nexport async function runGit(args: string[], options: GitRunOptions = {}): Promise<GitRunResult> {\n\tthrowIfAborted(options.signal);\n\tconst hooksPath = process.platform === \"win32\" ? \"NUL\" : \"/dev/null\";\n\tconst protocolArgs = [\n\t\t\"-c\",\n\t\t`core.hooksPath=${hooksPath}`,\n\t\t\"-c\",\n\t\t\"gc.auto=0\",\n\t\t\"-c\",\n\t\t\"maintenance.auto=false\",\n\t\t\"-c\",\n\t\t\"protocol.allow=never\",\n\t\t\"-c\",\n\t\t\"protocol.https.allow=always\",\n\t\t\"-c\",\n\t\t\"protocol.ssh.allow=always\",\n\t];\n\tif (options.allowFileProtocol) protocolArgs.push(\"-c\", \"protocol.file.allow=always\");\n\tconst commandArgs = [\n\t\t...(options.gitDir ? [`--git-dir=${options.gitDir}`] : []),\n\t\t...protocolArgs,\n\t\t...args,\n\t];\n\tconst inheritedEnvironment = Object.fromEntries(\n\t\tObject.entries(process.env).filter(\n\t\t\t([key]) =>\n\t\t\t\t!key.startsWith(\"GIT_\") &&\n\t\t\t\tkey !== \"PAGER\" &&\n\t\t\t\tkey !== \"EDITOR\" &&\n\t\t\t\tkey !== \"VISUAL\" &&\n\t\t\t\tkey !== \"SSH_ASKPASS\" &&\n\t\t\t\tkey !== \"SSH_ASKPASS_REQUIRE\",\n\t\t),\n\t);\n\tconst allowedGitOverrides = new Set([\n\t\t\"GIT_INDEX_FILE\",\n\t\t\"GIT_AUTHOR_NAME\",\n\t\t\"GIT_AUTHOR_EMAIL\",\n\t\t\"GIT_AUTHOR_DATE\",\n\t\t\"GIT_COMMITTER_NAME\",\n\t\t\"GIT_COMMITTER_EMAIL\",\n\t\t\"GIT_COMMITTER_DATE\",\n\t]);\n\tconst suppliedEnvironment = Object.fromEntries(\n\t\tObject.entries(options.env ?? {}).filter(\n\t\t\t([key]) => !key.startsWith(\"GIT_\") || allowedGitOverrides.has(key),\n\t\t),\n\t);\n\tconst env: NodeJS.ProcessEnv = {\n\t\t...inheritedEnvironment,\n\t\t...suppliedEnvironment,\n\t\tLC_ALL: \"C\",\n\t\tLANG: \"C\",\n\t\tGIT_CONFIG_NOSYSTEM: \"1\",\n\t\tGIT_TERMINAL_PROMPT: \"0\",\n\t\tGCM_INTERACTIVE: \"Never\",\n\t\tGIT_PAGER: \"cat\",\n\t\tPAGER: \"cat\",\n\t\tGIT_EDITOR: \"true\",\n\t\tEDITOR: \"true\",\n\t\tVISUAL: \"true\",\n\t\tGIT_ASKPASS: \"\",\n\t\tSSH_ASKPASS: \"\",\n\t\tSSH_ASKPASS_REQUIRE: \"never\",\n\t\tGIT_SSH_COMMAND: \"ssh -oBatchMode=yes\",\n\t};\n\tconst child = spawn(\"git\", commandArgs, {\n\t\tcwd: options.cwd,\n\t\tenv,\n\t\tstdio: [\"pipe\", \"pipe\", \"pipe\"],\n\t\tdetached: process.platform !== \"win32\",\n\t\twindowsHide: true,\n\t});\n\tconst stdout: Buffer[] = [];\n\tconst stderr: Buffer[] = [];\n\tlet total = 0;\n\tlet settled = false;\n\tlet terminationError: Error | undefined;\n\tlet escalationTimer: NodeJS.Timeout | undefined;\n\tconst limit = options.maxOutputBytes ?? DEFAULT_OUTPUT_LIMIT;\n\n\tconst terminate = (error: Error) => {\n\t\tif (settled || terminationError) return;\n\t\tterminationError = error;\n\t\tif (child.pid && process.platform !== \"win32\") {\n\t\t\ttry {\n\t\t\t\tprocess.kill(-child.pid, \"SIGTERM\");\n\t\t\t} catch {\n\t\t\t\tchild.kill(\"SIGTERM\");\n\t\t\t}\n\t\t} else {\n\t\t\tchild.kill(\"SIGTERM\");\n\t\t\tif (child.pid && process.platform === \"win32\") {\n\t\t\t\tconst killer = spawn(\"taskkill\", [\"/pid\", String(child.pid), \"/t\", \"/f\"], {\n\t\t\t\t\tstdio: \"ignore\",\n\t\t\t\t\twindowsHide: true,\n\t\t\t\t});\n\t\t\t\tkiller.on(\"error\", () => undefined);\n\t\t\t\tkiller.unref();\n\t\t\t}\n\t\t}\n\t\tescalationTimer = setTimeout(() => {\n\t\t\tif (settled) return;\n\t\t\tif (child.pid && process.platform !== \"win32\") {\n\t\t\t\ttry {\n\t\t\t\t\tprocess.kill(-child.pid, \"SIGKILL\");\n\t\t\t\t} catch {\n\t\t\t\t\tchild.kill(\"SIGKILL\");\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tchild.kill(\"SIGKILL\");\n\t\t\t}\n\t\t}, 2_000);\n\t};\n\tconst collect = (target: Buffer[]) => (chunk: Buffer) => {\n\t\ttotal += chunk.byteLength;\n\t\tif (total > limit) {\n\t\t\tterminate(new Error(`Git output exceeds the ${limit}-byte limit.`));\n\t\t\treturn;\n\t\t}\n\t\ttarget.push(Buffer.from(chunk));\n\t};\n\tchild.stdout.on(\"data\", collect(stdout));\n\tchild.stderr.on(\"data\", collect(stderr));\n\tchild.stdin.on(\"error\", () => undefined);\n\tchild.stdin.end(options.input);\n\tconst onAbort = () =>\n\t\tterminate(\n\t\t\toptions.signal?.reason instanceof Error\n\t\t\t\t? options.signal.reason\n\t\t\t\t: new DOMException(\"The operation was aborted\", \"AbortError\"),\n\t\t);\n\toptions.signal?.addEventListener(\"abort\", onAbort, { once: true });\n\tconst timer = setTimeout(\n\t\t() =>\n\t\t\tterminate(\n\t\t\t\tnew Error(`Git command timed out after ${options.timeoutMs ?? DEFAULT_TIMEOUT_MS}ms.`),\n\t\t\t),\n\t\toptions.timeoutMs ?? DEFAULT_TIMEOUT_MS,\n\t);\n\n\tlet result: GitRunResult;\n\ttry {\n\t\tresult = await new Promise<GitRunResult>((resolve, reject) => {\n\t\t\tchild.once(\"error\", reject);\n\t\t\tchild.once(\"close\", (code) => {\n\t\t\t\tsettled = true;\n\t\t\t\tif (escalationTimer) clearTimeout(escalationTimer);\n\t\t\t\tconst stdoutBuffer = Buffer.concat(stdout);\n\t\t\t\tconst stderrBuffer = Buffer.concat(stderr);\n\t\t\t\tif (terminationError) {\n\t\t\t\t\treject(terminationError);\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t\tif (code !== 0) {\n\t\t\t\t\tconst stderrText = stderrBuffer.toString(\"utf8\").trim();\n\t\t\t\t\treject(\n\t\t\t\t\t\tnew GitCommandError(\n\t\t\t\t\t\t\tstderrText || `Git exited with status ${code ?? \"unknown\"}.`,\n\t\t\t\t\t\t\tcode,\n\t\t\t\t\t\t\tstderrText,\n\t\t\t\t\t\t),\n\t\t\t\t\t);\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t\tresolve({ stdout: stdoutBuffer, stderr: stderrBuffer });\n\t\t\t});\n\t\t});\n\t} finally {\n\t\tclearTimeout(timer);\n\t\tif (escalationTimer) clearTimeout(escalationTimer);\n\t\toptions.signal?.removeEventListener(\"abort\", onAbort);\n\t}\n\treturn result;\n}\n\nexport function parseGitBlobBatch(output: Buffer, expectedCount: number, maxContentBytes: number) {\n\tif (!Number.isSafeInteger(expectedCount) || expectedCount < 0) {\n\t\tthrow new Error(\"Invalid Git batch object count.\");\n\t}\n\tif (!Number.isSafeInteger(maxContentBytes) || maxContentBytes < 0) {\n\t\tthrow new Error(\"Invalid Git batch content limit.\");\n\t}\n\tconst blobs: Buffer[] = [];\n\tlet offset = 0;\n\tlet contentBytes = 0;\n\tfor (let index = 0; index < expectedCount; index += 1) {\n\t\tconst headerEnd = output.indexOf(0x0a, offset);\n\t\tif (headerEnd < 0) throw new Error(\"Git cat-file batch response is truncated.\");\n\t\tconst header = output.subarray(offset, headerEnd).toString(\"utf8\");\n\t\tif (header.endsWith(\" missing\")) throw new Error(\"Git cat-file batch object is missing.\");\n\t\tconst match = /^(?<object>[0-9a-f]{40}) blob (?<size>0|[1-9][0-9]*)$/u.exec(header);\n\t\tif (!match?.groups) throw new Error(\"Git cat-file batch response is malformed.\");\n\t\tconst size = Number(match.groups.size);\n\t\tif (!Number.isSafeInteger(size)) throw new Error(\"Git cat-file batch size is malformed.\");\n\t\tcontentBytes += size;\n\t\tif (contentBytes > maxContentBytes) {\n\t\t\tthrow new Error(`Git cat-file batch content exceeds the ${maxContentBytes}-byte limit.`);\n\t\t}\n\t\tconst contentStart = headerEnd + 1;\n\t\tconst contentEnd = contentStart + size;\n\t\tif (contentEnd >= output.length) throw new Error(\"Git cat-file batch response is truncated.\");\n\t\tif (output[contentEnd] !== 0x0a) {\n\t\t\tthrow new Error(\"Git cat-file batch response is malformed.\");\n\t\t}\n\t\tblobs.push(Buffer.from(output.subarray(contentStart, contentEnd)));\n\t\toffset = contentEnd + 1;\n\t}\n\tif (offset !== output.length) throw new Error(\"Git cat-file batch response has trailing data.\");\n\treturn blobs;\n}\n\nexport async function readGitBlobs(\n\tobjects: string[],\n\toptions: Omit<GitRunOptions, \"input\" | \"maxOutputBytes\"> & { maxOutputBytes: number },\n) {\n\tif (objects.length === 0) return [];\n\tif (!Number.isSafeInteger(options.maxOutputBytes) || options.maxOutputBytes < 0) {\n\t\tthrow new Error(\"Invalid Git batch output limit.\");\n\t}\n\tif (objects.some((object) => !/^[0-9a-f]{40}$/u.test(object))) {\n\t\tthrow new Error(\"Invalid Git blob object id.\");\n\t}\n\tconst protocolOverhead = objects.length * 96;\n\tif (!Number.isSafeInteger(protocolOverhead + options.maxOutputBytes)) {\n\t\tthrow new Error(\"Invalid Git batch output limit.\");\n\t}\n\tconst result = await runGit([\"cat-file\", \"--batch\"], {\n\t\t...options,\n\t\tinput: `${objects.join(\"\\n\")}\\n`,\n\t\tmaxOutputBytes: options.maxOutputBytes + protocolOverhead,\n\t});\n\treturn parseGitBlobBatch(result.stdout, objects.length, options.maxOutputBytes);\n}\n\nfunction throwIfAborted(signal?: AbortSignal) {\n\tif (!signal?.aborted) return;\n\tthrow signal.reason instanceof Error\n\t\t? signal.reason\n\t\t: new DOMException(\"The operation was aborted\", \"AbortError\");\n}\n", "import { createHash } from \"node:crypto\";\nimport { portableSnapshotSelection, snapshotSelectionInclude } from \"./sync-policy.js\";\nimport type { Snapshot, SnapshotSelection } from \"./types.js\";\n\nexport const GIT_MANIFEST_VERSION = 2;\nexport const MAX_GIT_MANIFEST_BYTES = 1024 * 1024;\nexport const MAX_GIT_TREE_OUTPUT_BYTES = 16 * 1024 * 1024;\nexport const MAX_GIT_PAYLOAD_BYTES = 100 * 1024 * 1024;\nexport const MAX_GIT_SNAPSHOT_BYTES = 512 * 1024 * 1024;\nconst SNAPSHOT_VERSION = 1;\n\nexport interface GitManifestFile {\n\tpath: string;\n\tsha256: string;\n\tsize: number;\n}\n\nexport interface GitManifest {\n\tversion: number;\n\tsnapshotVersion: number;\n\tsnapshotId: string;\n\tcreatedAt: string;\n\tmachine: string;\n\tprofile: string;\n\tsyncSessions: boolean;\n\tsnapshotSyncSessions?: boolean;\n\tselection?: SnapshotSelection;\n\tfiles: GitManifestFile[];\n}\n\nexport interface PreparedGitFile extends GitManifestFile {\n\tcontent: Buffer;\n}\n\nexport interface GitTreeEntry {\n\tmode: string;\n\ttype: string;\n\tobject: string;\n\tpath: string;\n}\n\nexport function isGitPayloadSizeAllowed(size: number) {\n\treturn Number.isSafeInteger(size) && size >= 0 && size <= MAX_GIT_PAYLOAD_BYTES;\n}\n\nexport function requireGitManifest(value: unknown): GitManifest {\n\tif (!value || typeof value !== \"object\" || Array.isArray(value)) {\n\t\tthrow new Error(\"Git publication manifest is malformed.\");\n\t}\n\tconst manifest = value as Partial<GitManifest>;\n\tif (manifest.version === 1) {\n\t\tthrow new Error(\n\t\t\t\"Git publication uses the unsupported pre-release gzip format; recreate this pi-sync-owned test branch.\",\n\t\t);\n\t}\n\tif (\n\t\tmanifest.version !== GIT_MANIFEST_VERSION ||\n\t\tmanifest.snapshotVersion !== SNAPSHOT_VERSION ||\n\t\ttypeof manifest.snapshotId !== \"string\" ||\n\t\tmanifest.snapshotId.length > 512 ||\n\t\t!/^[A-Za-z0-9._-]+$/u.test(manifest.snapshotId) ||\n\t\ttypeof manifest.createdAt !== \"string\" ||\n\t\tmanifest.createdAt.length > 64 ||\n\t\thasControlCharacter(manifest.createdAt) ||\n\t\tNumber.isNaN(Date.parse(manifest.createdAt)) ||\n\t\ttypeof manifest.machine !== \"string\" ||\n\t\tmanifest.machine.length > 256 ||\n\t\thasControlCharacter(manifest.machine) ||\n\t\ttypeof manifest.profile !== \"string\" ||\n\t\tmanifest.profile.length === 0 ||\n\t\tmanifest.profile.length > 256 ||\n\t\thasControlCharacter(manifest.profile) ||\n\t\ttypeof manifest.syncSessions !== \"boolean\" ||\n\t\t(manifest.snapshotSyncSessions !== undefined &&\n\t\t\ttypeof manifest.snapshotSyncSessions !== \"boolean\") ||\n\t\t!Array.isArray(manifest.files) ||\n\t\t!hasExactKeys(manifest as Record<string, unknown>, [\n\t\t\t\"version\",\n\t\t\t\"snapshotVersion\",\n\t\t\t\"snapshotId\",\n\t\t\t\"createdAt\",\n\t\t\t\"machine\",\n\t\t\t\"profile\",\n\t\t\t\"syncSessions\",\n\t\t\t...(manifest.snapshotSyncSessions === undefined ? [] : [\"snapshotSyncSessions\"]),\n\t\t\t...(manifest.selection === undefined ? [] : [\"selection\"]),\n\t\t\t\"files\",\n\t\t])\n\t) {\n\t\tthrow new Error(\"Git publication manifest is malformed.\");\n\t}\n\tif (manifest.selection !== undefined) portableSnapshotSelection(manifest.selection);\n\tlet total = 0;\n\tconst paths = new Set<string>();\n\tfor (const rawFile of manifest.files) {\n\t\tif (!rawFile || typeof rawFile !== \"object\" || Array.isArray(rawFile)) {\n\t\t\tthrow new Error(\"Git publication manifest file is malformed.\");\n\t\t}\n\t\tconst file = rawFile as Partial<GitManifestFile>;\n\t\tif (\n\t\t\t!hasExactKeys(file as Record<string, unknown>, [\"path\", \"sha256\", \"size\"]) ||\n\t\t\t!isSafeSnapshotPath(file.path) ||\n\t\t\ttypeof file.sha256 !== \"string\" ||\n\t\t\t!/^[0-9a-f]{64}$/u.test(file.sha256) ||\n\t\t\ttypeof file.size !== \"number\" ||\n\t\t\t!isGitPayloadSizeAllowed(file.size) ||\n\t\t\tpaths.has(file.path)\n\t\t) {\n\t\t\tthrow new Error(\"Git publication manifest file is malformed.\");\n\t\t}\n\t\ttotal += file.size;\n\t\tif (!Number.isSafeInteger(total) || total > MAX_GIT_SNAPSHOT_BYTES) {\n\t\t\tthrow new Error(`Git snapshot content exceeds the ${MAX_GIT_SNAPSHOT_BYTES}-byte limit.`);\n\t\t}\n\t\tpaths.add(file.path);\n\t}\n\tassertNoPathConflicts([...paths]);\n\treturn manifest as GitManifest;\n}\n\nexport function validateGitSnapshot(snapshot: Snapshot, manifest: GitManifest, namespace: string) {\n\tconst prepared = prepareGitSnapshot(snapshot, namespace);\n\tconst syncSessions =\n\t\tsnapshot.syncSessions === true ||\n\t\tsnapshot.files.some((file) => file.path.startsWith(\"sessions/\"));\n\tif (\n\t\tsnapshot.id !== manifest.snapshotId ||\n\t\tsnapshot.createdAt !== manifest.createdAt ||\n\t\tsnapshot.machine !== manifest.machine ||\n\t\tsnapshot.profile !== manifest.profile ||\n\t\tsnapshot.syncSessions !== manifest.snapshotSyncSessions ||\n\t\tsyncSessions !== manifest.syncSessions ||\n\t\t!sameOptionalInclude(\n\t\t\tsnapshotSelectionInclude(snapshot),\n\t\t\tmanifest.selection === undefined\n\t\t\t\t? undefined\n\t\t\t\t: portableSnapshotSelection(manifest.selection).include,\n\t\t) ||\n\t\tprepared.length !== manifest.files.length ||\n\t\tprepared.some((file, index) => {\n\t\t\tconst expected = manifest.files[index];\n\t\t\treturn (\n\t\t\t\t!expected ||\n\t\t\t\tfile.path !== expected.path ||\n\t\t\t\tfile.sha256 !== expected.sha256 ||\n\t\t\t\tfile.size !== expected.size\n\t\t\t);\n\t\t})\n\t) {\n\t\tthrow new Error(\"Git snapshot identity does not match its publication manifest.\");\n\t}\n}\n\nexport function prepareGitSnapshot(snapshot: Snapshot, namespace: string) {\n\tsnapshotSelectionInclude(snapshot);\n\tif (\n\t\tsnapshot.version !== SNAPSHOT_VERSION ||\n\t\ttypeof snapshot.id !== \"string\" ||\n\t\t!snapshot.id ||\n\t\tsnapshot.id.length > 512 ||\n\t\t!/^[A-Za-z0-9._-]+$/u.test(snapshot.id) ||\n\t\tsnapshot.profile !== namespace ||\n\t\t!Array.isArray(snapshot.files) ||\n\t\ttypeof snapshot.createdAt !== \"string\" ||\n\t\t!snapshot.createdAt ||\n\t\tsnapshot.createdAt.length > 64 ||\n\t\thasControlCharacter(snapshot.createdAt) ||\n\t\tNumber.isNaN(Date.parse(snapshot.createdAt)) ||\n\t\ttypeof snapshot.machine !== \"string\" ||\n\t\tsnapshot.machine.length > 256 ||\n\t\thasControlCharacter(snapshot.machine)\n\t) {\n\t\tthrow new Error(\"Invalid Git snapshot publication.\");\n\t}\n\tconst paths = new Set<string>();\n\tconst prepared: PreparedGitFile[] = [];\n\tlet total = 0;\n\tfor (const file of snapshot.files) {\n\t\tif (\n\t\t\t!isSafeSnapshotPath(file.path) ||\n\t\t\ttypeof file.contentBase64 !== \"string\" ||\n\t\t\ttypeof file.sha256 !== \"string\" ||\n\t\t\t!/^[0-9a-f]{64}$/u.test(file.sha256) ||\n\t\t\tpaths.has(file.path)\n\t\t) {\n\t\t\tthrow new Error(\"Invalid Git snapshot file.\");\n\t\t}\n\t\tconst content = Buffer.from(file.contentBase64, \"base64\");\n\t\tif (content.toString(\"base64\") !== file.contentBase64 || sha256(content) !== file.sha256) {\n\t\t\tthrow new Error(\"Git snapshot file checksum mismatch.\");\n\t\t}\n\t\tif (!isGitPayloadSizeAllowed(content.byteLength)) {\n\t\t\tthrow new Error(\n\t\t\t\t`Git snapshot file exceeds GitHub's ${MAX_GIT_PAYLOAD_BYTES}-byte regular-Git limit: ${file.path}`,\n\t\t\t);\n\t\t}\n\t\ttotal += content.byteLength;\n\t\tif (!Number.isSafeInteger(total) || total > MAX_GIT_SNAPSHOT_BYTES) {\n\t\t\tthrow new Error(`Git snapshot content exceeds the ${MAX_GIT_SNAPSHOT_BYTES}-byte limit.`);\n\t\t}\n\t\tpaths.add(file.path);\n\t\tprepared.push({ path: file.path, sha256: file.sha256, size: content.byteLength, content });\n\t}\n\tassertNoPathConflicts([...paths]);\n\treturn prepared;\n}\n\nexport function parseGitTree(output: Buffer): GitTreeEntry[] {\n\tif (output.byteLength === 0) return [];\n\tif (output.at(-1) !== 0) throw new Error(\"Git publication tree response is malformed.\");\n\treturn output\n\t\t.subarray(0, -1)\n\t\t.toString(\"utf8\")\n\t\t.split(\"\\0\")\n\t\t.map((line) => {\n\t\t\tconst match =\n\t\t\t\t/^(?<mode>[0-9]{6}) (?<type>blob|tree|commit) (?<object>[0-9a-f]{40})\\t(?<path>.+)$/u.exec(\n\t\t\t\t\tline,\n\t\t\t\t);\n\t\t\tif (!match?.groups || hasControlCharacter(match.groups.path)) {\n\t\t\t\tthrow new Error(\"Git publication tree response is malformed.\");\n\t\t\t}\n\t\t\treturn {\n\t\t\t\tmode: match.groups.mode,\n\t\t\t\ttype: match.groups.type,\n\t\t\t\tobject: match.groups.object,\n\t\t\t\tpath: match.groups.path,\n\t\t\t};\n\t\t});\n}\n\nexport function validateGitPublicationTree(\n\tentries: GitTreeEntry[],\n\tmanifest: GitManifest,\n\tmanifestPath: string,\n\tfilePath: (path: string) => string,\n) {\n\tconst byPath = new Map<string, GitTreeEntry>();\n\tfor (const entry of entries) {\n\t\tif (byPath.has(entry.path)) throw new Error(\"Git publication tree contains duplicate paths.\");\n\t\tbyPath.set(entry.path, entry);\n\t}\n\tconst expectedPaths = [manifestPath, ...manifest.files.map((file) => filePath(file.path))];\n\tif (entries.length !== expectedPaths.length || expectedPaths.some((path) => !byPath.has(path))) {\n\t\tthrow new Error(\"Git publication tree has missing or extra files.\");\n\t}\n\tfor (const expectedPath of expectedPaths) {\n\t\tconst entry = byPath.get(expectedPath);\n\t\tif (entry?.mode !== \"100644\" || entry.type !== \"blob\") {\n\t\t\tthrow new Error(`Git publication tree contains a non-regular file: ${expectedPath}`);\n\t\t}\n\t}\n\treturn manifest.files.map((file) => byPath.get(filePath(file.path)) as GitTreeEntry);\n}\n\nfunction sameOptionalInclude(left: string[] | undefined, right: string[] | undefined) {\n\tif (!left || !right) return left === right;\n\treturn left.length === right.length && left.every((item, index) => item === right[index]);\n}\n\nfunction isSafeSnapshotPath(value: unknown): value is string {\n\treturn (\n\t\ttypeof value === \"string\" &&\n\t\tvalue.length > 0 &&\n\t\tvalue.length <= 4096 &&\n\t\t!value.startsWith(\"/\") &&\n\t\t!value.includes(\"\\\\\") &&\n\t\t!hasControlCharacter(value) &&\n\t\tvalue\n\t\t\t.split(\"/\")\n\t\t\t.every(\n\t\t\t\t(segment) =>\n\t\t\t\t\tsegment && segment !== \".\" && segment !== \"..\" && segment.toLowerCase() !== \".git\",\n\t\t\t)\n\t);\n}\n\nfunction hasExactKeys(value: Record<string, unknown>, expected: string[]) {\n\tconst keys = Object.keys(value).sort();\n\tconst expectedKeys = [...expected].sort();\n\treturn (\n\t\tkeys.length === expectedKeys.length && keys.every((key, index) => key === expectedKeys[index])\n\t);\n}\n\nfunction assertNoPathConflicts(paths: string[]) {\n\tconst sorted = [...paths].sort();\n\tfor (let index = 1; index < sorted.length; index += 1) {\n\t\tconst parent = sorted[index - 1];\n\t\tconst child = sorted[index];\n\t\tif (parent && child?.startsWith(`${parent}/`)) {\n\t\t\tthrow new Error(`Git snapshot file path conflict: ${parent} and ${child}`);\n\t\t}\n\t}\n}\n\nfunction sha256(value: Buffer) {\n\treturn createHash(\"sha256\").update(value).digest(\"hex\");\n}\n\nfunction hasControlCharacter(value: string) {\n\t// biome-ignore lint/suspicious/noControlCharactersInRegex: Reject untrusted terminal/ref controls.\n\treturn /[\\u0000-\\u001f\\u007f-\\u009f]/u.test(value);\n}\n"],
  "mappings": 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  "names": ["createHash", "process", "path", "throwIfAborted", "sha256", "createHash"]
}