isDirectory

This method uses a trick of lstat to check if a path is a directory, or a symlink to a directory.

declare class AdbSync {
  isDirectory(path: string): Promise<boolean>;
}

As stated in lstat/stat page, sync protocol doesn't support stat system call (which follows symlinks) until Android 8. This method doesn't use stat to follow symlinks, but appends a / to the path and calls lstat instead. Which means this method works on all Android versions.

If a file system error (e.g. target not exist) occurs, this method will return false.

Example

const isDirectory = await sync.isDirectory('/sdcard');

Equivalent ADB command

Although not exactly the same:

adb shell stat -L -c %F /sdcard