v2.1.88 反编译源码

从 npm 包 @anthropic-ai/claude-code 2.1.88 版本提取的反编译源码
包含 src/ 目录下的 TypeScript 源文件及 vendor/ 原生模块源码

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/bridge/bridgePointer.ts

@@ -0,0 +1,210 @@
+import { mkdir, readFile, stat, unlink, writeFile } from 'fs/promises'
+import { dirname, join } from 'path'
+import { z } from 'zod/v4'
+import { logForDebugging } from '../utils/debug.js'
+import { isENOENT } from '../utils/errors.js'
+import { getWorktreePathsPortable } from '../utils/getWorktreePathsPortable.js'
+import { lazySchema } from '../utils/lazySchema.js'
+import {
+  getProjectsDir,
+  sanitizePath,
+} from '../utils/sessionStoragePortable.js'
+import { jsonParse, jsonStringify } from '../utils/slowOperations.js'
+
+/**
+ * Upper bound on worktree fanout. git worktree list is naturally bounded
+ * (50 is a LOT), but this caps the parallel stat() burst and guards against
+ * pathological setups. Above this, --continue falls back to current-dir-only.
+ */
+const MAX_WORKTREE_FANOUT = 50
+
+/**
+ * Crash-recovery pointer for Remote Control sessions.
+ *
+ * Written immediately after a bridge session is created, periodically
+ * refreshed during the session, and cleared on clean shutdown. If the
+ * process dies unclean (crash, kill -9, terminal closed), the pointer
+ * persists. On next startup, `claude remote-control` detects it and offers
+ * to resume via the --session-id flow from #20460.
+ *
+ * Staleness is checked against the file's mtime (not an embedded timestamp)
+ * so that a periodic re-write with the same content serves as a refresh —
+ * matches the backend's rolling BRIDGE_LAST_POLL_TTL (4h) semantics. A
+ * bridge that's been polling for 5+ hours and then crashes still has a
+ * fresh pointer as long as the refresh ran within the window.
+ *
+ * Scoped per working directory (alongside transcript JSONL files) so two
+ * concurrent bridges in different repos don't clobber each other.
+ */
+
+export const BRIDGE_POINTER_TTL_MS = 4 * 60 * 60 * 1000
+
+const BridgePointerSchema = lazySchema(() =>
+  z.object({
+    sessionId: z.string(),
+    environmentId: z.string(),
+    source: z.enum(['standalone', 'repl']),
+  }),
+)
+
+export type BridgePointer = z.infer<ReturnType<typeof BridgePointerSchema>>
+
+export function getBridgePointerPath(dir: string): string {
+  return join(getProjectsDir(), sanitizePath(dir), 'bridge-pointer.json')
+}
+
+/**
+ * Write the pointer. Also used to refresh mtime during long sessions —
+ * calling with the same IDs is a cheap no-content-change write that bumps
+ * the staleness clock. Best-effort — a crash-recovery file must never
+ * itself cause a crash. Logs and swallows on error.
+ */
+export async function writeBridgePointer(
+  dir: string,
+  pointer: BridgePointer,
+): Promise<void> {
+  const path = getBridgePointerPath(dir)
+  try {
+    await mkdir(dirname(path), { recursive: true })
+    await writeFile(path, jsonStringify(pointer), 'utf8')
+    logForDebugging(`[bridge:pointer] wrote ${path}`)
+  } catch (err: unknown) {
+    logForDebugging(`[bridge:pointer] write failed: ${err}`, { level: 'warn' })
+  }
+}
+
+/**
+ * Read the pointer and its age (ms since last write). Operates directly
+ * and handles errors — no existence check (CLAUDE.md TOCTOU rule). Returns
+ * null on any failure: missing file, corrupted JSON, schema mismatch, or
+ * stale (mtime > 4h ago). Stale/invalid pointers are deleted so they don't
+ * keep re-prompting after the backend has already GC'd the env.
+ */
+export async function readBridgePointer(
+  dir: string,
+): Promise<(BridgePointer & { ageMs: number }) | null> {
+  const path = getBridgePointerPath(dir)
+  let raw: string
+  let mtimeMs: number
+  try {
+    // stat for mtime (staleness anchor), then read. Two syscalls, but both
+    // are needed — mtime IS the data we return, not a TOCTOU guard.
+    mtimeMs = (await stat(path)).mtimeMs
+    raw = await readFile(path, 'utf8')
+  } catch {
+    return null
+  }
+
+  const parsed = BridgePointerSchema().safeParse(safeJsonParse(raw))
+  if (!parsed.success) {
+    logForDebugging(`[bridge:pointer] invalid schema, clearing: ${path}`)
+    await clearBridgePointer(dir)
+    return null
+  }
+
+  const ageMs = Math.max(0, Date.now() - mtimeMs)
+  if (ageMs > BRIDGE_POINTER_TTL_MS) {
+    logForDebugging(`[bridge:pointer] stale (>4h mtime), clearing: ${path}`)
+    await clearBridgePointer(dir)
+    return null
+  }
+
+  return { ...parsed.data, ageMs }
+}
+
+/**
+ * Worktree-aware read for `--continue`. The REPL bridge writes its pointer
+ * to `getOriginalCwd()` which EnterWorktreeTool/activeWorktreeSession can
+ * mutate to a worktree path — but `claude remote-control --continue` runs
+ * with `resolve('.')` = shell CWD. This fans out across git worktree
+ * siblings to find the freshest pointer, matching /resume's semantics.
+ *
+ * Fast path: checks `dir` first. Only shells out to `git worktree list` if
+ * that misses — the common case (pointer in launch dir) is one stat, zero
+ * exec. Fanout reads run in parallel; capped at MAX_WORKTREE_FANOUT.
+ *
+ * Returns the pointer AND the dir it was found in, so the caller can clear
+ * the right file on resume failure.
+ */
+export async function readBridgePointerAcrossWorktrees(
+  dir: string,
+): Promise<{ pointer: BridgePointer & { ageMs: number }; dir: string } | null> {
+  // Fast path: current dir. Covers standalone bridge (always matches) and
+  // REPL bridge when no worktree mutation happened.
+  const here = await readBridgePointer(dir)
+  if (here) {
+    return { pointer: here, dir }
+  }
+
+  // Fanout: scan worktree siblings. getWorktreePathsPortable has a 5s
+  // timeout and returns [] on any error (not a git repo, git not installed).
+  const worktrees = await getWorktreePathsPortable(dir)
+  if (worktrees.length <= 1) return null
+  if (worktrees.length > MAX_WORKTREE_FANOUT) {
+    logForDebugging(
+      `[bridge:pointer] ${worktrees.length} worktrees exceeds fanout cap ${MAX_WORKTREE_FANOUT}, skipping`,
+    )
+    return null
+  }
+
+  // Dedupe against `dir` so we don't re-stat it. sanitizePath normalizes
+  // case/separators so worktree-list output matches our fast-path key even
+  // on Windows where git may emit C:/ vs stored c:/.
+  const dirKey = sanitizePath(dir)
+  const candidates = worktrees.filter(wt => sanitizePath(wt) !== dirKey)
+
+  // Parallel stat+read. Each readBridgePointer is a stat() that ENOENTs
+  // for worktrees with no pointer (cheap) plus a ~100-byte read for the
+  // rare ones that have one. Promise.all → latency ≈ slowest single stat.
+  const results = await Promise.all(
+    candidates.map(async wt => {
+      const p = await readBridgePointer(wt)
+      return p ? { pointer: p, dir: wt } : null
+    }),
+  )
+
+  // Pick freshest (lowest ageMs). The pointer stores environmentId so
+  // resume reconnects to the right env regardless of which worktree
+  // --continue was invoked from.
+  let freshest: {
+    pointer: BridgePointer & { ageMs: number }
+    dir: string
+  } | null = null
+  for (const r of results) {
+    if (r && (!freshest || r.pointer.ageMs < freshest.pointer.ageMs)) {
+      freshest = r
+    }
+  }
+  if (freshest) {
+    logForDebugging(
+      `[bridge:pointer] fanout found pointer in worktree ${freshest.dir} (ageMs=${freshest.pointer.ageMs})`,
+    )
+  }
+  return freshest
+}
+
+/**
+ * Delete the pointer. Idempotent — ENOENT is expected when the process
+ * shut down clean previously.
+ */
+export async function clearBridgePointer(dir: string): Promise<void> {
+  const path = getBridgePointerPath(dir)
+  try {
+    await unlink(path)
+    logForDebugging(`[bridge:pointer] cleared ${path}`)
+  } catch (err: unknown) {
+    if (!isENOENT(err)) {
+      logForDebugging(`[bridge:pointer] clear failed: ${err}`, {
+        level: 'warn',
+      })
+    }
+  }
+}
+
+function safeJsonParse(raw: string): unknown {
+  try {
+    return jsonParse(raw)
+  } catch {
+    return null
+  }
+}