tests/readlink.py

import-checker: allow all absolute imports of stdlib modules

Before this patch, we didn't allow imports like

  from importlib import resources

(That's the reason I used `import importlib.resources` in D7629.)

I think that form is still an absolute import, so I don't think we
forbade on purpose.

Differential Revision: https://phab.mercurial-scm.org/D7700

#!/usr/bin/env python

from __future__ import absolute_import, print_function

import errno
import os
import sys

for f in sys.argv[1:]:
    try:
        print(f, '->', os.readlink(f))
    except OSError as err:
        if err.errno != errno.EINVAL:
            raise
        print(f, '->', f, 'not a symlink')

sys.exit(0)