tests/readlink.py

dirstate-v2: add flag to `debugstate` to print docket information

This is useful information that we don't easily have access to currently,
unless you speak fluent xxd.

This replaces `debugdirstateignorepatternshash`, which I'll remove in the next
changeset.

Differential Revision: https://phab.mercurial-scm.org/D12590

#!/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)