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#!/usr/bin/python
# -*- mode: python; coding: utf-8 -*-

# Copyright © 2008 Jeffrey C. Ollie

# 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 3 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, see
# <http://www.gnu.org/licenses/>.

import os

from qpid.util import connect
from qpid.connection import Connection
from qpid.datatypes import Message, RangedSet, uuid4
from qpid.queue import Empty

from lxml import etree

def get_diff(cvsroot, directory, filename, old_version, new_version):
    #diffcmd = '/usr/bin/cvs -f -d "%s" diff -kk -u -N -r %s -r %s "%s" 2>/dev/null' % (cvsroot,
    #											old_version,
    #											new_version,
    #											os.path.join(directory,
    #												     filename))

    diff = u'Index: %s\n' % os.path.join(directory, filename)
    diffcmd = u'/usr/bin/rcsdiff -kk -u -r%s -r%s "%s,v" 2>&1' % (old_version,
								  new_version,
								  os.path.join(cvsroot,
									       directory,
									       filename))
    fp = os.popen(diffcmd)
    diff += fp.read().decode('utf-8')
    status = fp.close()
    return diff

host = '127.0.0.1'
port = 5672

socket = connect(host, port)
connection = Connection (sock=socket)
connection.start()
session = connection.session(str(uuid4()))

local_queue_name = 'local_queue'
local_queue = session.incoming(local_queue_name)

session.message_subscribe(queue = 'loginfo_queue', destination = local_queue_name)
local_queue.start()

message = None
while True:
    try:
	message = local_queue.get()

	root_element = etree.fromstring(message.body)

	cvsroot = root_element.xpath('/loginfo/cvsroot')[0].text
	directory = root_element.xpath('/loginfo/directory')[0].text

	for file_element in root_element.xpath('/loginfo/files/file'):
	    filename = file_element.xpath('filename')[0].text
	    old_version = file_element.xpath('old-version')[0].text
	    new_version = file_element.xpath('new-version')[0].text

	    diff = get_diff(cvsroot, directory, filename, old_version, new_version)
	    diff_element = etree.SubElement(file_element, 'diff')
	    diff_element.text = diff

	session.message_accept(RangedSet(message.id))

	print etree.tostring(root_element, pretty_print = True)

    except Empty:
        print 'No more messages!'
        break

session.close(timeout=10)