655c8d46f8
Three changes in one commit: 1. NEW lib/util/atomic-write.mjs — exports atomicWriteJson(path, obj), the canonical tmp+rename pattern. Reused by pre-compact-flush.mjs and (in subsequent steps) by the new session-state writer. 2. NEW tests/lib/atomic-write.test.mjs — 4 unit tests covering round-trip, no-orphan-tmp, overwrite-atomic, pretty-print formatting. 3. REFACTOR hooks/scripts/pre-compact-flush.mjs — replace the inline atomicWrite() with the imported atomicWriteJson(). Also fixes a pre-existing syntax error (leading whitespace + stray --resume token outside the comment block) that silently broke the hook from v3.1.0 onward — PreCompact runtime is fail-open and swallowed the error. File reformatted with standard zero-indent JS. 163 → 167 tests, 0 fail. Step 2 of /ultracontinue v3.3.0 (project 2026-05-01-ultracontinue).
14 lines
531 B
JavaScript
14 lines
531 B
JavaScript
// lib/util/atomic-write.mjs
|
|
// Atomic JSON file write — writes to {path}.tmp then renames to {path}.
|
|
// Crash-safe: a partial write leaves the original file untouched.
|
|
//
|
|
// Extracted from hooks/scripts/pre-compact-flush.mjs in v3.3.0 so that
|
|
// session-state writers and progress.json writers share one implementation.
|
|
|
|
import { writeFileSync, renameSync } from 'node:fs';
|
|
|
|
export function atomicWriteJson(path, obj) {
|
|
const tmp = path + '.tmp';
|
|
writeFileSync(tmp, JSON.stringify(obj, null, 2));
|
|
renameSync(tmp, path);
|
|
}
|