tests/readlink.py

compat: don't rely on cpython-specific builtins manipulation

Pierre Augier signaled on the mailing list that this fails on Pypy and pointed
out the correct solution.

Differential Revision: https://phab.mercurial-scm.org/D11732

#!/usr/bin/env python3

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)