Function watchFile

packages/cli/src/runner.ts:299–337

(
  inputFile: string,
  output: string,
  signal: AbortSignal,
  enqueue: (task: Task) => void
)

}

async function watchFile(
  inputFile: string,
  output: string,
  signal: AbortSignal,
  enqueue: (task: Task) => void
): Promise<void> {
  const watcher = chokidar.watch(inputFile, {
    persistent: true,
    ignoreInitial: true,
    awaitWriteFinish: {
      stabilityThreshold: WATCH_STABILITY_MS,
      pollInterval: 50,
    },
  });

  const targetFile = resolveOutputFilePath(output);

  const handleEvent = async (event: WatchEvent) => {
    if (event === "unlink") {
      await fs.rm(targetFile, { force: true });
      logRemoval(inputFile, targetFile);
      return;
    }

    if (event === "add" || event === "change") {
      await compileMirrowFile(inputFile, targetFile);
    }
  };

  watcher.on("all", (event) => {
    enqueue(() => handleEvent(event as WatchEvent));
  });

  watcher.on("error", (error) => {
    logWatchError(error);
  });

  await waitForAbort(watcher, signal);
}

function resolveOutputForRelative(
  outputRoot: string,