tests/readlink.py

alias: improve help text for command aliases

Displays the line "alias for: hg ..." with the original command including options,
followed by the command's original help text.

#!/usr/bin/env python

import errno, os, sys

for f in sys.argv[1:]:
    try:
        print f, '->', os.readlink(f)
    except OSError, err:
        if err.errno != errno.EINVAL: raise
        print f, 'not a symlink'

sys.exit(0)