tests/readlink.py

zsh_completion: add -b/--branch and -B/--bookmark(s) flags properly

_hg_branch_bmark_opts used to add these two flags, but had the same
descriptions for the flags regardless of what command took them and didn't
allow specifying flags more than once (no '*' at the start). Even more
importantly, it assumed that -B was always expecting an argument (i.e.
--bookmark=foo), but in case of incoming and outgoing it's not so (--bookmarks
is self-sufficient).

Differential Revision: https://phab.mercurial-scm.org/D4612

#!/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)