Function withFileLock

packages/computer/src/tools/fs/edit.ts:80–91

(path: string, fn: () => Promise<T>)

// share the queue.
const fileLocks = new Map<string, Promise<unknown>>();
async function withFileLock<T>(path: string, fn: () => Promise<T>): Promise<T> {
  const prev = fileLocks.get(path) ?? Promise.resolve();
  const next = prev.then(fn, fn);
  fileLocks.set(
    path,
    next.finally(() => {
      // Clear only if we're still the tail of the chain.
      if (fileLocks.get(path) === next) fileLocks.delete(path);
    }),
  );
  return next;
}

export function createEditTool(options: EditToolOptions): Tool<z.infer<typeof inputSchema>> {
  const { store } = options;