tests/readlink.py

phases: enforce internal phase support

We should not use the internal phase for repository without the requirement.
Otherwise, older clients could have a look at the repository and see the
internal changesets.

For now, we introduce a low-level Programming error, more UI friendly error
will be introduced later.

#!/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)