Files
gbrain/src/core/brain-writer.ts
T
d165e99f0b fix(brain-writer): deadline race verdict from the sentinel, not the clock the timer raced (#2947)
Part of #2946. The hung-COUNT deadline race derived its verdict from a
post-await wall-clock re-check, which races the timer's own drift: on
loaded CI runners setTimeout callbacks fire measurably EARLY relative to
Date.now(), so each padding/boundary adjustment (>=, +1ms) only moved
which wrong status the partial-scan test received ('scanned', then
'partial').

The race's timeout arm now resolves a module-private sentinel; the
sentinel winning IS the deadline verdict (deadlineHit), consulted by the
post-await check without re-reading the clock. A COUNT that resolves
null (failed/absent count) stays distinguishable and does not skip the
scan; a COUNT that resolves slowly without the timer winning is still
caught by the retained wall-clock re-check. The +1ms pad is gone — the
sentinel makes timer drift irrelevant for the hung path.

Verified: partial-scan suite green 8 consecutive runs incl. the new
null-vs-sentinel distinction test.


Claude-Session: https://claude.ai/code/session_01KFWV7zBZFcmD94Vek6xRDT

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
2026-07-20 11:08:41 -07:00

747 lines
29 KiB
TypeScript

/**
* brain-writer — frontmatter validation/audit/auto-fix orchestrator.
*
* Thin layer on top of `parseMarkdown(..., {validate:true})` (the canonical
* source of frontmatter validation rules) and `isSyncable()` (the canonical
* brain-page filter). Three consumers call into this module: the
* `gbrain frontmatter` CLI, the `frontmatter_integrity` doctor subcheck, and
* the v0.22.4 migration audit phase. Single source of truth — no parallel
* validation stack.
*
* Path-guard contract: writeBrainPage refuses to write outside the source
* path. Pre-write backups are the safety contract (works for both git and
* non-git brain repos; the existing src/core/dry-fix.ts:getWorkingTreeStatus
* rejects non-git repos as unsafe, which is the wrong shape for brain
* rewrites). Backups live under ~/.gbrain/backups/frontmatter/... instead of
* beside source files so bulk repair never litters the user's workspace.
*/
import { createHash } from 'crypto';
import { existsSync, readFileSync, readdirSync, copyFileSync, writeFileSync, mkdirSync, lstatSync } from 'fs';
import { join, relative, resolve, dirname, basename, isAbsolute } from 'path';
import type { BrainEngine } from './engine.ts';
import type { ProgressReporter } from './progress.ts';
import { gbrainPath } from './config.ts';
import { collectGitVisibleFiles } from './git-visible-files.ts';
import {
parseMarkdown,
type ParseValidationCode,
type ParseValidationError,
} from './markdown.ts';
import { isSyncable, pruneDir, slugifyPath } from './sync.ts';
export type { ParseValidationCode };
export interface AuditFix {
code: ParseValidationCode;
description: string;
}
export interface PerSourceReport {
source_id: string;
source_path: string;
total: number;
errors_by_code: Partial<Record<ParseValidationCode, number>>;
sample: { path: string; codes: ParseValidationCode[] }[];
ignoredMissingOpen: number;
/** Did this source finish the walk, get interrupted, or never start?
* 'scanned' = full walk completed.
* 'partial' = deadline/abort fired mid-walk; counts reflect prefix only.
* 'skipped' = source was never visited (outer loop broke before reaching it). */
status: 'scanned' | 'partial' | 'skipped';
/** Count of .md files actually parsed (numerator for "scanned ~N of M" doctor message).
* Distinct from `total` (which counts ERRORS) and `ignoredMissingOpen`. */
files_scanned: number;
/** DB-side denominator for the partial-state message. Coarse — DB pages and
* on-disk syncable files are overlapping but not identical sets. NULL when the
* COUNT query failed or wasn't issued. */
db_page_count?: number | null;
}
export interface AuditReport {
ok: boolean;
total: number;
errors_by_code: Partial<Record<ParseValidationCode, number>>;
per_source: PerSourceReport[];
scanned_at: string;
ignored_missing_open?: number;
/** True when any source got `status: 'partial'` or `'skipped'`. Doctor uses
* this to render the warn message and to ensure `ok` is false even when the
* scanned prefix happened to be clean (codex C2 fix). */
partial: boolean;
/** Source id where deadline/abort fired mid-walk, or null when no partial. */
aborted_at_source: string | null;
}
const SAMPLE_PER_SOURCE = 20;
// ---------------------------------------------------------------------------
// Frontmatter backups
// ---------------------------------------------------------------------------
export function makeFrontmatterBackupRunId(date = new Date()): string {
return date.toISOString().replace(/[:.]/g, '-');
}
export interface FrontmatterBackupOpts {
sourcePath?: string;
backupRoot?: string;
runId?: string;
}
function sourceKey(sourcePath: string): string {
return createHash('sha256').update(resolve(sourcePath)).digest('hex').slice(0, 12);
}
export function defaultFrontmatterBackupRoot(runId = makeFrontmatterBackupRunId()): string {
return gbrainPath('backups', 'frontmatter', runId);
}
export function createFrontmatterBackup(filePath: string, opts: FrontmatterBackupOpts = {}): string {
const resolvedFile = resolve(filePath);
const resolvedSource = resolve(opts.sourcePath ?? dirname(resolvedFile));
const rel = relative(resolvedSource, resolvedFile);
const safeRel = rel && !rel.startsWith('..') && !isAbsolute(rel) ? rel : basename(resolvedFile);
const root = opts.backupRoot ?? defaultFrontmatterBackupRoot(opts.runId);
const backupPath = join(root, sourceKey(resolvedSource), safeRel + '.bak');
mkdirSync(dirname(backupPath), { recursive: true });
copyFileSync(resolvedFile, backupPath);
return backupPath;
}
// ---------------------------------------------------------------------------
// autoFixFrontmatter
// ---------------------------------------------------------------------------
/**
* Mechanical auto-repair for the fixable subset of validation codes:
* - NULL_BYTES — strip \x00 characters
* - NESTED_QUOTES — rewrite `"... "inner" ..."` to single-quoted outer
* - MISSING_CLOSE — insert `---` before the first heading found inside
* the YAML zone
* - SLUG_MISMATCH — remove `slug:` line (gbrain derives slug from path)
*
* Idempotent: running twice is a no-op on already-clean input. Any error class
* not in the list above is left untouched (e.g. EMPTY_FRONTMATTER, YAML_PARSE,
* MISSING_OPEN — those need human review).
*/
export function autoFixFrontmatter(
content: string,
opts?: { filePath?: string },
): { content: string; fixes: AuditFix[] } {
const fixes: AuditFix[] = [];
let working = content;
// 1. NULL_BYTES — strip them. Cheap, byte-level. Run first so subsequent
// line-based passes don't trip on stray nulls.
if (working.indexOf('\x00') >= 0) {
working = working.replace(/\x00/g, '');
fixes.push({ code: 'NULL_BYTES', description: 'Stripped null bytes' });
}
// 2. MISSING_CLOSE — if there's an opener but no closer before a heading,
// insert `---` immediately before the heading. Walk lines once.
{
const lines = working.split('\n');
let firstNonEmpty = -1;
for (let i = 0; i < lines.length; i++) {
if (lines[i].trim().length > 0) { firstNonEmpty = i; break; }
}
if (firstNonEmpty >= 0 && lines[firstNonEmpty].trim() === '---') {
let closeIdx = -1;
let headingIdx = -1;
for (let i = firstNonEmpty + 1; i < lines.length; i++) {
const t = lines[i].trim();
if (t === '---') { closeIdx = i; break; }
if (/^#{1,6}\s/.test(t)) { headingIdx = i; break; }
}
if (closeIdx === -1 && headingIdx >= 0) {
const fixed = [
...lines.slice(0, headingIdx),
'---',
'',
...lines.slice(headingIdx),
];
working = fixed.join('\n');
fixes.push({
code: 'MISSING_CLOSE',
description: `Inserted closing --- before heading at line ${headingIdx + 1}`,
});
}
}
}
// Both step 3a and step 3 produce NESTED_QUOTES fix records on different
// patterns. When both fire on the same file, push ONE merged record rather
// than two — keeps the audit count honest about distinct files affected.
let nestedQuotesFixed = false;
// 3a. Canonical-style normalization for `tags:` / `aliases:` flow arrays.
// Post-v0.37.5.0 validator (PR #1229), `tags: ["yc", "w2025"]` is already
// valid YAML and no longer flagged. This pass rewrites it to the
// canonical single-quoted form (`tags: ['yc', 'w2025']`) so disk-side
// `frontmatter validate --fix` produces output consistent with the
// v0.37.9.0 serializer. Allow-list keys deliberately scoped to
// `tags` / `aliases` — extending to arbitrary keys would rewrite typed
// arrays (e.g. `scores: ["1", "2"]` would lose numeric intent).
{
const lines = working.split('\n');
let firstNonEmpty = -1;
for (let i = 0; i < lines.length; i++) {
if (lines[i].trim().length > 0) { firstNonEmpty = i; break; }
}
if (firstNonEmpty >= 0 && lines[firstNonEmpty].trim() === '---') {
let closeIdx = lines.length;
for (let i = firstNonEmpty + 1; i < lines.length; i++) {
if (lines[i].trim() === '---') { closeIdx = i; break; }
}
let fixedAny = false;
for (let i = firstNonEmpty + 1; i < closeIdx; i++) {
// Allow-list: only `tags` and `aliases` (the keys this wave targets).
const arrMatch = lines[i].match(/^(\s*(?:tags|aliases)\s*:\s*)\[(.*)\]\s*$/);
if (!arrMatch || !arrMatch[2].includes('"')) continue;
const [, prefix, inner] = arrMatch;
// Quote-aware comma split — items may contain commas inside quotes.
const items: string[] = [];
let current = '';
let inQuote = false;
for (let j = 0; j < inner.length; j++) {
const ch = inner[j];
if (ch === '"' && (j === 0 || inner[j - 1] !== '\\')) {
inQuote = !inQuote;
} else if (ch === ',' && !inQuote) {
items.push(current.trim());
current = '';
} else {
current += ch;
}
}
if (current.trim()) items.push(current.trim());
// Re-quote: single quotes by default, double-quote fallback when the
// item contains an apostrophe (YAML's single-quoted form would need
// `''` escaping which the validator accepts but reads poorly).
const reQuoted = items.map(v => {
const clean = v.replace(/^"|"$/g, '').trim();
if (!clean) return "''";
return clean.includes("'") ? `"${clean}"` : `'${clean}'`;
});
lines[i] = `${prefix}[${reQuoted.join(', ')}]`;
fixedAny = true;
}
if (fixedAny) {
working = lines.join('\n');
fixes.push({
code: 'NESTED_QUOTES',
description: 'Normalized JSON-style double-quoted tag/alias arrays to single-quoted YAML',
});
nestedQuotesFixed = true;
}
}
}
// 3. NESTED_QUOTES — rewrite `key: "...inner..."` lines that have 3+ unescaped
// double-quotes by switching the outer wrapper to single quotes and
// leaving inner quotes alone.
{
const lines = working.split('\n');
let firstNonEmpty = -1;
for (let i = 0; i < lines.length; i++) {
if (lines[i].trim().length > 0) { firstNonEmpty = i; break; }
}
if (firstNonEmpty >= 0 && lines[firstNonEmpty].trim() === '---') {
let closeIdx = lines.length;
for (let i = firstNonEmpty + 1; i < lines.length; i++) {
if (lines[i].trim() === '---') { closeIdx = i; break; }
}
let fixedAny = false;
for (let i = firstNonEmpty + 1; i < closeIdx; i++) {
const m = lines[i].match(/^(\s*[A-Za-z_][\w-]*\s*:\s*)"(.*)"\s*(.*)$/);
if (!m) continue;
const [, prefix, inner, trailing] = m;
let count = 0;
for (let j = 0; j < inner.length; j++) {
if (inner[j] === '"' && (j === 0 || inner[j - 1] !== '\\')) count++;
}
// Total " on the line includes the two outer quotes the regex
// captured, plus whatever's in inner. We need 3+ to trigger.
if (count >= 1) {
// Inner already has unescaped " — outer wrap is causing the YAML
// parse failure. Rewrite to 'single-quoted'. YAML escapes `'` inside
// a single-quoted string by doubling it.
const escapedInner = inner.replace(/'/g, "''");
lines[i] = `${prefix}'${escapedInner}'${trailing ? ' ' + trailing : ''}`.replace(/\s+$/, '');
fixedAny = true;
}
}
if (fixedAny) {
working = lines.join('\n');
if (!nestedQuotesFixed) {
fixes.push({
code: 'NESTED_QUOTES',
description: 'Rewrote nested double-quoted YAML values to single-quoted',
});
nestedQuotesFixed = true;
}
}
}
}
// 4. SLUG_MISMATCH — remove `slug:` line if filePath is provided and the
// declared slug doesn't match the path-derived one. Per PR #392 spec,
// gbrain derives slug from path; the field shouldn't be in frontmatter.
if (opts?.filePath) {
const expectedSlug = slugifyPath(opts.filePath);
// Use the (possibly partially-fixed) working content to detect whether
// the slug field is present and mismatched.
const re = /^slug:\s*(.+?)\s*$/m;
const m = working.match(re);
if (m && m[1].replace(/^["']|["']$/g, '') !== expectedSlug) {
working = working.replace(re, '').replace(/\n{3,}/g, '\n\n');
fixes.push({
code: 'SLUG_MISMATCH',
description: `Removed mismatched slug field (was "${m[1]}", expected "${expectedSlug}")`,
});
}
}
return { content: working, fixes };
}
// ---------------------------------------------------------------------------
// writeBrainPage — path-guarded write with centralized backup
// ---------------------------------------------------------------------------
export class BrainWriterError extends Error {
code: string;
hint?: string;
constructor(code: string, message: string, hint?: string) {
super(message);
this.name = 'BrainWriterError';
this.code = code;
this.hint = hint;
}
}
/**
* Path-guarded brain page writer. Always writes a backup under
* ~/.gbrain/backups/frontmatter/... before any in-place mutation (the contract
* that replaces git-tree-clean for non-git brain repos). Throws
* BrainWriterError if filePath is not under sourcePath.
*/
export function writeBrainPage(
filePath: string,
content: string,
opts: { sourcePath: string; autoFix?: boolean; backupRoot?: string; backupRunId?: string },
): { fixes: AuditFix[]; backupPath?: string } {
const resolvedSource = resolve(opts.sourcePath);
const resolvedTarget = resolve(filePath);
if (resolvedTarget !== resolvedSource && !resolvedTarget.startsWith(resolvedSource + '/')) {
throw new BrainWriterError(
'PATH_OUTSIDE_SOURCE',
`writeBrainPage: ${filePath} is not under ${opts.sourcePath}`,
'Pass --source <id> matching the source the file lives in.',
);
}
let toWrite = content;
let fixes: AuditFix[] = [];
if (opts.autoFix) {
const result = autoFixFrontmatter(content, { filePath });
toWrite = result.content;
fixes = result.fixes;
}
let backupPath: string | undefined;
if (existsSync(filePath)) {
backupPath = createFrontmatterBackup(filePath, {
sourcePath: opts.sourcePath,
backupRoot: opts.backupRoot,
runId: opts.backupRunId,
});
} else {
mkdirSync(dirname(filePath), { recursive: true });
}
writeFileSync(filePath, toWrite, 'utf8');
return { fixes, backupPath };
}
// ---------------------------------------------------------------------------
// scanBrainSources
// ---------------------------------------------------------------------------
interface SourceRow {
id: string;
local_path: string | null;
}
export interface ScanOpts {
/** Limit scan to one source. When omitted, all registered sources with a
* local_path are scanned. */
sourceId?: string;
/** Missing frontmatter is optional metadata coverage for broad document
* sources. Set true for curated page repos that require every file to carry
* YAML frontmatter. */
strictMissingOpen?: boolean;
onProgress?: ProgressReporter;
/** Outer-loop abort: checked at source boundaries in scanBrainSources.
* Does NOT interrupt the synchronous file-walk inside a single source —
* use `deadline` for that. */
signal?: AbortSignal;
/** Hard wall-clock bound for the synchronous walk. When set, scanOneSource
* checks `Date.now() > deadline` before parsing each file and returns
* partial state when exceeded.
*
* This is the load-bearing mid-walk interruption mechanism. AbortSignal.timeout
* cannot interrupt sync readdirSync/lstatSync/readFileSync (event loop blocked),
* so a deadline epoch-ms check is the only way to actually bound wall-clock
* inside the visit loop. Worst-case overshoot: one file's parse time. */
deadline?: number;
/** Async per-source DB hook: doctor uses this to fetch a coarse denominator
* (`SELECT COUNT(*) FROM pages WHERE source_id = $1 AND deleted_at IS NULL`)
* for the "scanned ~N of M" partial message. Returns null on query failure;
* scanBrainSources stamps the result on PerSourceReport.db_page_count.
* Optional — when omitted, db_page_count stays undefined. */
dbPageCountForSource?: (sourceId: string) => Promise<number | null>;
/** Test seam — fired by walkDir once per directory it descends into
* (post-pruneDir). Production callers don't pass this; the regression
* suite uses it to assert descent-time pruning directly. */
visitDir?: (dirPath: string) => void;
}
/** Timeout-arm winner for the COUNT-vs-deadline race in scanBrainSources.
* A unique object so it can never collide with a legitimate COUNT result
* (number | null). Module-private. */
const DEADLINE_SENTINEL: unique symbol = Symbol('gbrain.scan.deadline');
export async function scanBrainSources(
engine: BrainEngine,
opts: ScanOpts = {},
): Promise<AuditReport> {
const sources = await listSources(engine, opts.sourceId);
const totals: Partial<Record<ParseValidationCode, number>> = {};
const perSource: PerSourceReport[] = [];
let grandTotal = 0;
let ignoredMissingOpen = 0;
let abortedAtSource: string | null = null;
// Helper: mark sources from index i onward as 'skipped'. Used at every
// between-source abort point (top of loop AND after the COUNT await).
const markRemainingSkipped = (startIdx: number) => {
for (let j = startIdx; j < sources.length; j++) {
const skipped = sources[j];
if (!skipped.local_path) continue;
perSource.push({
source_id: skipped.id,
source_path: skipped.local_path,
total: 0,
errors_by_code: {},
sample: [],
ignoredMissingOpen: 0,
status: 'skipped',
files_scanned: 0,
});
}
};
for (let i = 0; i < sources.length; i++) {
const src = sources[i];
// Between-source abort check: AbortSignal works here (no sync I/O blocking
// the event loop at this boundary). For mid-walk interruption use deadline.
// `>=` not `>`: when Date.now() lands exactly on the deadline boundary,
// the budget IS exhausted — proceeding to scanOneSource would let the
// next source eat its own budget on top of what's already been spent.
// (Strict `>` was a real flake source on CI: GitHub Actions runners
// landing on the boundary exactly during a Promise.race timeout.)
if (opts.signal?.aborted || (opts.deadline && Date.now() >= opts.deadline)) {
// Codex adversarial review #3: when deadline fires BETWEEN sources,
// also stamp aborted_at_source with the source we were about to start.
// Pre-fix, the doctor message said "PARTIAL SCAN" with no source name.
if (abortedAtSource === null && src.local_path) {
abortedAtSource = src.id;
}
markRemainingSkipped(i);
break;
}
if (!src.local_path) continue;
if (!existsSync(src.local_path)) {
// Source registered but path is missing on disk; surface as a zero-row
// entry with a synthetic SCAN_PATH_MISSING note via warn-and-skip.
perSource.push({
source_id: src.id,
source_path: src.local_path,
total: 0,
errors_by_code: {},
sample: [],
ignoredMissingOpen: 0,
status: 'scanned',
files_scanned: 0,
});
continue;
}
// Best-effort denominator fetch — degrades gracefully on query failure.
// Codex adversarial #4: also race against the deadline. A wedged Postgres
// pool can make this await hang past the budget. Without the race, we'd
// wait indefinitely AND defeat the wall-clock guarantee.
let dbPageCount: number | null = null;
// Set when the deadline race's timeout arm wins: the verdict that the
// budget is spent, independent of any later Date.now() reading. Timer
// callbacks on loaded runners can fire measurably EARLY relative to the
// wall clock (a +1ms pad was drifted past in practice — see the flake
// lineage in test/brain-writer-partial-scan.test.ts and issue #2946), so
// the hung-COUNT path must not re-derive "did the deadline fire?" from
// the clock the timer just raced against.
let deadlineHit = false;
if (opts.dbPageCountForSource) {
try {
if (opts.deadline) {
const remainingMs = opts.deadline - Date.now();
if (remainingMs <= 0) {
dbPageCount = null;
deadlineHit = true;
} else {
// Race COUNT against the deadline so a hung query can't eat the
// budget. The timeout arm resolves a private sentinel — NOT null —
// so a deadline win is distinguishable from a COUNT that resolved
// null (failed/absent count keeps its existing semantics).
const raced = await Promise.race([
opts.dbPageCountForSource(src.id),
new Promise<typeof DEADLINE_SENTINEL>(resolve =>
setTimeout(() => resolve(DEADLINE_SENTINEL), remainingMs)),
]);
if (raced === DEADLINE_SENTINEL) {
dbPageCount = null;
deadlineHit = true;
} else {
dbPageCount = raced;
}
}
} else {
dbPageCount = await opts.dbPageCountForSource(src.id);
}
} catch {
// A throwing COUNT is a failed count, not a deadline verdict.
dbPageCount = null;
}
}
// Codex adversarial #2: re-check deadline AFTER the COUNT await. If the
// await ate the budget, we must NOT call scanOneSource — it would return
// status='partial' with files_scanned=0, which is misleading ("partial
// scan" when actually nothing was scanned). Mark this source + remainder
// as 'skipped' so the doctor message is honest.
// `deadlineHit` is the authoritative verdict for the hung-COUNT path (the
// sentinel above); the wall-clock re-check (`>=`, matching the
// between-source check at line ~445) still covers a COUNT that RESOLVED
// slowly enough to eat the budget without the timer winning.
if (opts.signal?.aborted || deadlineHit || (opts.deadline && Date.now() >= opts.deadline)) {
if (abortedAtSource === null) {
abortedAtSource = src.id;
}
markRemainingSkipped(i);
break;
}
const report = scanOneSource(src.id, src.local_path, opts);
report.db_page_count = dbPageCount;
perSource.push(report);
grandTotal += report.total;
ignoredMissingOpen += report.ignoredMissingOpen;
for (const [code, n] of Object.entries(report.errors_by_code)) {
const k = code as ParseValidationCode;
totals[k] = (totals[k] ?? 0) + (n as number);
}
if (report.status === 'partial' && abortedAtSource === null) {
abortedAtSource = src.id;
}
}
const hasPartialOrSkipped = perSource.some(r => r.status === 'partial' || r.status === 'skipped');
return {
// Partial scans can never be 'ok' even when the scanned prefix is clean
// (codex outside-voice C2 — a clean prefix doesn't speak for the
// unscanned suffix).
ok: grandTotal === 0 && !hasPartialOrSkipped,
total: grandTotal,
errors_by_code: totals,
per_source: perSource,
scanned_at: new Date().toISOString(),
ignored_missing_open: ignoredMissingOpen || undefined,
partial: hasPartialOrSkipped,
aborted_at_source: abortedAtSource,
};
}
function scanOneSource(
sourceId: string,
sourcePath: string,
opts: ScanOpts,
): PerSourceReport {
const errorsByCode: Partial<Record<ParseValidationCode, number>> = {};
const sample: PerSourceReport['sample'] = [];
const rootResolved = resolve(sourcePath);
let scanned = 0;
let total = 0;
let ignoredMissingOpen = 0;
let interrupted = false;
const visitFile = (absPath: string): boolean | void => {
// Per-file deadline + abort gate. Deadline is the load-bearing
// wall-clock bound (sync I/O blocks the event loop so timer-based
// AbortSignal.timeout can't fire mid-walk — codex C1).
if (opts.deadline && Date.now() > opts.deadline) {
interrupted = true;
return false;
}
if (opts.signal?.aborted) {
interrupted = true;
return false;
}
// visitDir is consulted from walkDir directly (passed below). The
// per-file visit closure doesn't need it.
const relPath = relative(rootResolved, absPath);
if (!isSyncable(relPath, { strategy: 'markdown' })) return true;
scanned++;
let content: string;
try {
content = readFileSync(absPath, 'utf8');
} catch {
return true; // skip unreadable
}
const expectedSlug = slugifyPath(relPath);
const parsed = parseMarkdown(content, relPath, { validate: true, expectedSlug });
const errs = (parsed.errors ?? []).filter((e) => {
if (e.code !== 'MISSING_OPEN') return true;
if (opts.strictMissingOpen) return true;
ignoredMissingOpen++;
return false;
});
if (errs.length > 0) {
total += errs.length;
const codes: ParseValidationCode[] = [];
for (const e of errs) {
errorsByCode[e.code] = (errorsByCode[e.code] ?? 0) + 1;
codes.push(e.code);
}
if (sample.length < SAMPLE_PER_SOURCE) {
sample.push({ path: relPath, codes });
}
}
if (opts.onProgress && scanned % 50 === 0) {
opts.onProgress.tick(50);
}
return true;
};
const gitFiles = collectGitVisibleFiles(rootResolved, (rel) => isSyncable(rel, { strategy: 'markdown' }));
if (gitFiles) {
if (opts.visitDir) opts.visitDir(rootResolved);
for (const absPath of gitFiles) {
if (visitFile(absPath) === false) break;
}
} else {
walkDir(rootResolved, visitFile, opts.visitDir);
}
if (opts.onProgress) {
opts.onProgress.heartbeat(`scanned ${scanned} pages in ${sourceId}`);
}
return {
source_id: sourceId,
source_path: sourcePath,
total,
errors_by_code: errorsByCode,
sample,
ignoredMissingOpen,
status: interrupted ? 'partial' : 'scanned',
files_scanned: scanned,
};
}
/**
* Recursive directory walker with symlink-loop protection (via lstat) and
* descent-time pruning of vendor / hidden / generated subtrees.
*
* Walks `root`, calling `visit(absPath)` for each regular file. Returning
* `false` from `visit` stops the walk (used by scanOneSource for deadline
* + abort).
*
* `pruneDir(name, parentDir)` is the canonical pruning gate (single source
* of truth at src/core/sync.ts:258 — sync, extract, and transcript-discovery
* all share it). Skipped subtrees: `node_modules`, `.git`, `.obsidian`,
* `*.raw`, `ops`, all dot-prefix dirs, and git submodule dirs (`.git` as
* FILE not DIRECTORY, the gitfile pattern from v0.37.7.0 #1169).
*
* Pre-v0.38.2.0 this walker descended into every subtree and let
* `isSyncable` filter at the leaf — paying the IO cost of stat'ing hundreds
* of thousands of vendor entries that were never going to be parsed. That
* was the root cause of the `gbrain doctor` hang on 216K-page brains
* reported in PR #1287.
*
* Optional `visitDir(dir)` is fired once per directory the walker decides
* to DESCEND INTO (post-pruneDir, post-visited-set check). Production
* callers don't pass it; tests use it to assert descent-time pruning
* directly. Output-based tests pass under the original bug because
* `isSyncable` filters at the leaf — `visitDir` is the load-bearing
* observability hook for the regression suite.
*/
/** @internal — exported for the regression test suite (visitDir-based
* descent-time pruning assertions). Production callers should go through
* scanBrainSources / scanOneSource. */
export function walkDir(
root: string,
visit: (absPath: string) => boolean | void,
visitDir?: (dirPath: string) => void,
): void {
const stack: string[] = [root];
const visited = new Set<string>();
if (visitDir) visitDir(root);
while (stack.length > 0) {
const dir = stack.pop()!;
let entries: string[];
try {
entries = readdirSync(dir);
} catch {
continue;
}
for (const name of entries) {
const full = join(dir, name);
let st: ReturnType<typeof lstatSync>;
try {
st = lstatSync(full);
} catch {
continue;
}
if (st.isSymbolicLink()) continue; // matches sync's no-symlink policy
if (st.isDirectory()) {
// Descent-time prune — the actual fix for the 216K-page hang.
if (!pruneDir(name, dir)) continue;
const real = resolve(full);
if (visited.has(real)) continue;
visited.add(real);
if (visitDir) visitDir(full);
stack.push(full);
} else if (st.isFile()) {
const result = visit(full);
if (result === false) return;
}
}
}
}
async function listSources(engine: BrainEngine, sourceId?: string): Promise<SourceRow[]> {
if (sourceId) {
const rows = await engine.executeRaw<SourceRow>(
`SELECT id, local_path FROM sources WHERE id = $1`,
[sourceId],
);
return rows;
}
return engine.executeRaw<SourceRow>(
`SELECT id, local_path FROM sources WHERE local_path IS NOT NULL ORDER BY id`,
);
}