/brz/remove-bazaar

# Copyright (C) 2009 Scott Chacon <schacon@gmail.com>

# Copyright (C) 2009 Jelmer Vernooij <jelmer@samba.org>

# 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 urllib

def format_hg_metadata(renames, branch, extra):

    """Construct a tail with hg-git metadata.

    :param renames: List of (oldpath, newpath) tuples with file renames

    :param branch: Branch name

    :param extra: Dictionary with extra data

    :return: Tail for commit message

    """

    extra_message = ''

    if branch != 'default':

        extra_message += "branch : " + branch + "\n"

    if renames:

        for oldfile, newfile in renames:

            extra_message += "rename : " + oldfile + " => " + newfile + "\n"

    for key, value in extra.iteritems():

        if key in ('author', 'committer', 'encoding', 'message', 'branch', 'hg-git'):

            continue

        else:

            extra_message += "extra : " + key + " : " +  urllib.quote(value) + "\n"

    if extra_message:

        return "\n--HG--\n" + extra_message

    else:

        return ""

def extract_hg_metadata(message):

    """Extract Mercurial metadata from a commit message.

    :param message: Commit message to extract from

    :return: Tuple with original commit message, renames, branch and 

        extra data.

    """

    split = message.split("\n--HG--\n", 1)

    renames = {}

    extra = {}

    branch = None

    if len(split) == 2:

        message, meta = split

        lines = meta.split("\n")

        for line in lines:

            if line == '':

                continue

            command, data = line.split(" : ", 1)

            if command == 'rename':

                before, after = data.split(" => ", 1)

                renames[after] = before

            elif command == 'branch':

                branch = data

            elif command == 'extra':

                before, after = data.split(" : ", 1)

                extra[before] = urllib.unquote(after)

            else:

                raise KeyError("unknown hg-git metadata command %s" % command)

    return (message, renames, branch, extra)