Function atomicWriteFileSync

src/installer/targets/shared.ts:81–94

(filePath: string, content: string)

 * file is cleaned up on rename failure.
 */
export function atomicWriteFileSync(filePath: string, content: string): void {
  const dir = path.dirname(filePath);
  if (!fs.existsSync(dir)) {
    fs.mkdirSync(dir, { recursive: true });
  }
  const tmpPath = filePath + '.tmp.' + process.pid;
  try {
    fs.writeFileSync(tmpPath, content);
    fs.renameSync(tmpPath, filePath);
  } catch (err) {
    try { fs.unlinkSync(tmpPath); } catch { /* ignore */ }
    throw err;
  }
}

/**
 * Atomic JSON write. Trailing newline matches the convention every