tests/readlink.py

help: document that [subpaths] may rewrite relative paths

The subpaths substitution logic first attempts to match the absolute
repository path, then the relative subrepository path if that failed.

#!/usr/bin/env python

import errno, os, 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, 'not a symlink'

sys.exit(0)