discovery: move code to create outgoing from roots and heads changegroup.changegroupsubset() contained somewhat low-level code for constructing an "outgoing" instance from a list of roots and heads nodes. It feels like discovery.py is a more appropriate location for this code. This code can definitely be optimized, as outgoing.missing will recompute the set of changesets we've already discovered from cl.between(). But code shouldn't be refactored during a move, so I've simply inserted a TODO calling attention to that.

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#!/usr/bin/env python

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from __future__ import absolute_import, print_function

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import errno

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import os

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import sys

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for f in sys.argv[1:]:

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    try:

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        print(f, '->', os.readlink(f))

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    except OSError as err:

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        if err.errno != errno.EINVAL:

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            raise

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        print(f, '->', f, 'not a symlink')

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sys.exit(0)