Method startPerDirectory

src/sync/watcher.ts:459–461

* Linux: walk the (non-ignored) tree and watch each directory. One inotify * watch per directory reports create/modify/delete for that directory's * direct children, so we never watch individual files.

()

   * direct children, so we never watch individual files.
   */
  private startPerDirectory(): void {
    this.watchTree(this.projectRoot, /* markExisting */ false);
  }

  /**
   * Add an inotify watch for `dir` and recurse into its non-ignored