tests/readlink.py

dagutil: remove descendantset() and ancestorset()

descendantset() is unused after the previous commit. And
ancestorset() was only used by descendantset(), so it can be removed
as well.

.. api:: descendantset() and ancestorset() removed from dagutil

   Use a revset instead when operating on the changelog. Or use
   various functionality in the ancestor or dagop modules.

Differential Revision: https://phab.mercurial-scm.org/D4315

#!/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)