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fix: browse CLI Windows lockfile — use string flag instead of numeric constants

Browse Source 
Bun compiled binaries on Windows don't handle numeric fs.constants
correctly. The string flag 'wx' is semantically identical to
O_CREAT | O_EXCL | O_WRONLY per Node docs and works on all platforms.

Fixes #599

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Garry Tan
2026-03-28 08:11:04 -07:00
parent 7dc03596df
commit a1bbc76c12
1 changed files with 3 additions and 2 deletions
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browse/src/cli.ts
+3 -2
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@@ -291,8 +291,9 @@ async function startServer(extraEnv?: Record<string, string>): Promise<ServerSta
function acquireServerLock(): (() => void) | null {
const lockPath = `${config.stateFile}.lock`;
try {
// O_CREAT | O_EXCL — fails if file already exists (atomic check-and-create)
const fd = fs.openSync(lockPath, fs.constants.O_CREAT | fs.constants.O_EXCL | fs.constants.O_WRONLY);
// 'wx' — create exclusively, fails if file already exists (atomic check-and-create)
// Using string flag instead of numeric constants for Bun Windows compatibility
const fd = fs.openSync(lockPath, 'wx');
fs.writeSync(fd, `${process.pid}\n`);
fs.closeSync(fd);
return () => { try { fs.unlinkSync(lockPath); } catch {} };