# Copyright (c) 2012 The Chromium OS Authors.
#
# See file CREDITS for list of people who contributed to this
# project.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#

import command
import gitutil
import os

def FindGetMaintainer():
    """Look for the get_maintainer.pl script.

    Returns:
        If the script is found we'll return a path to it; else None.
    """
    try_list = [
        os.path.join(gitutil.GetTopLevel(), 'scripts'),
        ]
    # Look in the list
    for path in try_list:
        fname = os.path.join(path, 'get_maintainer.pl')
        if os.path.isfile(fname):
            return fname

    return None

def GetMaintainer(fname, verbose=False):
    """Run get_maintainer.pl on a file if we find it.

    We look for get_maintainer.pl in the 'scripts' directory at the top of
    git.  If we find it we'll run it.  If we don't find get_maintainer.pl
    then we fail silently.

    Args:
        fname: Path to the patch file to run get_maintainer.pl on.

    Returns:
        A list of email addresses to CC to.
    """
    get_maintainer = FindGetMaintainer()
    if not get_maintainer:
        if verbose:
            print "WARNING: Couldn't find get_maintainer.pl"
        return []

    stdout = command.Output(get_maintainer, '--norolestats', fname)
    return stdout.splitlines()