#!/usr/bin/env python

#-*- coding:utf-8 -*-

#

# Copyright © 2009 Germán Póo-Caamaño <gpoo@gnome.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 Library 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 sys

from patterns import patterns

class LogPatchSplitter:

    """

        LogPatchSplitters provides a iterator to extract every

        changeset from a git log output.

        Typical use case:

            patches = LogPatchSplitter(sys.stdin)

            for patch in patches:

                parse_patch(patch)

    """

    def __init__(self, fd):

        self.fd = fd

        self.buffer = None

        self.patch = []

    def __iter__(self):

        return self

    def next(self):

        patch = self.__grab_patch__()

        if not patch:

            raise StopIteration

        return patch

    def __grab_patch__(self):

        """

            Extract a patch from the file descriptor and the

            patch is returned as a list of lines.

        """

        patch = []

        line = self.buffer or self.fd.readline()

        while line:

            m = patterns['commit'].match(line)

            if m:

                patch = [line]

                break

            line = self.fd.readline()

        if not line:

            return None

        line = self.fd.readline()

        while line:

            # If this line starts a new commit, drop out.

            m = patterns['commit'].match(line)

            if m:

                self.buffer = line

                break

            patch.append(line)

            self.buffer = None

            line = self.fd.readline()

        return patch

if __name__ == '__main__':

    patches = LogPatchSplitter(sys.stdin)

    for patch in patches:

        print '---------- NEW PATCH ----------'

        for line in patch:

            print line,