tests/readlink.py

wireprotov2: define type to represent pre-encoded object

An upcoming commit will introduce a caching layer to command
serving. This will require the ability to cache pre-encoded data.

This commit introduces a type to represent pre-encoded data and
teaches the output layer to not CBOR encode an instance of that
type.

Differential Revision: https://phab.mercurial-scm.org/D4772

#!/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)