tests/readlink.py

bundle2: support chunk iterator as part data

When the `part.data` attribute is an iterator, we assume it is an iterator of
chunks and use it.

We use a chunkbuffer to yield chunks of 4096 bytes.

The tests are updated to use this feature.

#!/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)