tests/readlink.py

phabricator: add phabupdate command to update status in batch

Changing status (accept, etc) on the webpage is not very convenient -
currently there is no way to accept (or abandon etc.) a stack using a single
click or command.

This patch adds a `phabupdate` command that could be used to change status
in batch. It also supports `--comment` which will write a comment on the
last revision, which is similar to what we do using emails.

Differential Revision: https://phab.mercurial-scm.org/D127

#!/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)