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#!/usr/bin/python
# IVLE - Informatics Virtual Learning Environment
# Copyright (C) 2007-2008 The University of Melbourne
#
# 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# Script: diffservice
# Author: David Coles
# Date: 26/2/2008
# A CGI script for generating a diff report page in HTML. It is intended to be
# run from the trampoline by the Diff application.
from common import cgirequest
from cgi import parse_qs
from os import path
import pysvn
import re
import urlparse
def htmlfy_diff(difftext):
"""Adds HTML markup to a udiff string"""
output = difftext
match_file = re.compile(r'^([\+\-]{3})\s(\S+)\s\((.+)\)$',re.MULTILINE)
match_range = re.compile(r'^\@\@ (.*) \@\@$',re.MULTILINE)
match_add = re.compile(r'^\+(.*)$',re.MULTILINE)
match_sub = re.compile(r'^\-(.*)$',re.MULTILINE)
match_special = re.compile(r'^\\(.*)$',re.MULTILINE)
output = match_file.sub(
r'<span class="diff_files">\1 \2 <em>(\3)</em></span>', output)
output = match_range.sub(
r'<span class="diff_range">@@ \1 @@</span>', output)
output = match_add.sub(
r'<span class="diff_add">+\1</span>', output)
output = match_sub.sub(
r'<span class="diff_sub">-\1</span>', output)
output = match_special.sub(
r'<span class="diff_special">\\\1</span>', output)
return output
def get_revision(r_str):
""" Returns a Revison object for pysvn from a r query string """
if r_str == "HEAD":
return pysvn.Revision( pysvn.opt_revision_kind.head )
elif r_str == "WORKING":
return pysvn.Revision( pysvn.opt_revision_kind.working )
elif r_str == "BASE":
return pysvn.Revision( pysvn.opt_revision_kind.base )
else:
try:
r = int(r_str)
return pysvn.Revision( pysvn.opt_revision_kind.number, r)
except:
return None
# Use a CGIRequest object to make the CGI environment look like the normal
# IVLE handler environment.
req = cgirequest.CGIRequest()
# CGI Headers
print("Content-Type: text/html\n")
print("\n")
# Beginning of the page
print('<div id="ivle_padding">')
print('<h1>Diff</h1>')
# Work out the revisions from query
url = urlparse.urlparse(req.path)
querystr = url[4]
urlpath = url[2]
query = parse_qs(querystr)
# Default revisions
rev1=pysvn.Revision( pysvn.opt_revision_kind.base )
rev2=pysvn.Revision( pysvn.opt_revision_kind.working )
if 'r' in query:
if len(query['r']) == 2:
r2 = get_revision(query['r'][1])
if r2 != None:
rev2 = r2
r1 = get_revision(query['r'][0])
if r1 != None:
rev1=r1
# Attempt to get the diff for these revisons
try:
svnclient = pysvn.Client()
diff = svnclient.diff
diff_text = diff( '/tmp/svndiff',
path.join('/home/', urlpath),
revision1=rev1,
#revision1=pysvn.Revision( pysvn.opt_revision_kind.base ),
#url_or_path2=url_or_path,
revision2=rev2,
#revision2=pysvn.Revision( opt_revision_kind.working ),
#recurse=True,
#ignore_ancestry=False,
#diff_deleted=True,
#ignore_content_type=False,
#header_encoding="",
#diff_options=[]
)
# Split up the udiff into individual files
diff_matcher = re.compile(
r'^Index: (.*)\n\=+\n((?:[^I].*\n)*)',re.MULTILINE
)
split_diff = diff_matcher.findall(diff_text)
# Prints output
print("<dl>")
for filediff in split_diff:
filename = filediff[0]
diffbody = htmlfy_diff(filediff[1])
print("<dt><strong>File:</strong> " + filename + "</dt>")
print("<dd><code><pre>" + diffbody + "</pre></code></dd>")
print("</dl>")
except pysvn._pysvn_2_5.ClientError, e:
print("<dl><dt><strong>Error:</strong></dt><dd>")
print(e)
print("</dd></dl>")
print('</div>')
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