|
|
# -*- coding: utf-8 -*-
|
|
|
"""
|
|
|
rhodecode.lib.diffs
|
|
|
~~~~~~~~~~~~~~~~~~~
|
|
|
|
|
|
Set of diffing helpers, previously part of vcs
|
|
|
|
|
|
|
|
|
:created_on: Dec 4, 2011
|
|
|
:author: marcink
|
|
|
:copyright: (C) 2009-2011 Marcin Kuzminski <marcin@python-works.com>
|
|
|
:original copyright: 2007-2008 by Armin Ronacher
|
|
|
:license: GPLv3, see COPYING for more details.
|
|
|
"""
|
|
|
# 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 re
|
|
|
import difflib
|
|
|
|
|
|
from itertools import tee, imap
|
|
|
|
|
|
from mercurial.match import match
|
|
|
|
|
|
from vcs.exceptions import VCSError
|
|
|
from vcs.nodes import FileNode
|
|
|
|
|
|
def get_gitdiff(filenode_old, filenode_new, ignore_whitespace=True, context=3):
|
|
|
"""
|
|
|
Returns git style diff between given ``filenode_old`` and ``filenode_new``.
|
|
|
|
|
|
:param ignore_whitespace: ignore whitespaces in diff
|
|
|
"""
|
|
|
|
|
|
for filenode in (filenode_old, filenode_new):
|
|
|
if not isinstance(filenode, FileNode):
|
|
|
raise VCSError("Given object should be FileNode object, not %s"
|
|
|
% filenode.__class__)
|
|
|
|
|
|
old_raw_id = getattr(filenode_old.changeset, 'raw_id', '0' * 40)
|
|
|
new_raw_id = getattr(filenode_new.changeset, 'raw_id', '0' * 40)
|
|
|
|
|
|
repo = filenode_new.changeset.repository
|
|
|
vcs_gitdiff = repo._get_diff(old_raw_id, new_raw_id, filenode_new.path,
|
|
|
ignore_whitespace, context)
|
|
|
|
|
|
return vcs_gitdiff
|
|
|
|
|
|
|
|
|
class DiffProcessor(object):
|
|
|
"""
|
|
|
Give it a unified diff and it returns a list of the files that were
|
|
|
mentioned in the diff together with a dict of meta information that
|
|
|
can be used to render it in a HTML template.
|
|
|
"""
|
|
|
_chunk_re = re.compile(r'@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@(.*)')
|
|
|
|
|
|
def __init__(self, diff, differ='diff', format='udiff'):
|
|
|
"""
|
|
|
:param diff: a text in diff format or generator
|
|
|
:param format: format of diff passed, `udiff` or `gitdiff`
|
|
|
"""
|
|
|
if isinstance(diff, basestring):
|
|
|
diff = [diff]
|
|
|
|
|
|
self.__udiff = diff
|
|
|
self.__format = format
|
|
|
self.adds = 0
|
|
|
self.removes = 0
|
|
|
|
|
|
if isinstance(self.__udiff, basestring):
|
|
|
self.lines = iter(self.__udiff.splitlines(1))
|
|
|
|
|
|
elif self.__format == 'gitdiff':
|
|
|
udiff_copy = self.copy_iterator()
|
|
|
self.lines = imap(self.escaper, self._parse_gitdiff(udiff_copy))
|
|
|
else:
|
|
|
udiff_copy = self.copy_iterator()
|
|
|
self.lines = imap(self.escaper, udiff_copy)
|
|
|
|
|
|
# Select a differ.
|
|
|
if differ == 'difflib':
|
|
|
self.differ = self._highlight_line_difflib
|
|
|
else:
|
|
|
self.differ = self._highlight_line_udiff
|
|
|
|
|
|
def escaper(self, string):
|
|
|
return string.replace('<', '<').replace('>', '>')
|
|
|
|
|
|
def copy_iterator(self):
|
|
|
"""
|
|
|
make a fresh copy of generator, we should not iterate thru
|
|
|
an original as it's needed for repeating operations on
|
|
|
this instance of DiffProcessor
|
|
|
"""
|
|
|
self.__udiff, iterator_copy = tee(self.__udiff)
|
|
|
return iterator_copy
|
|
|
|
|
|
def _extract_rev(self, line1, line2):
|
|
|
"""
|
|
|
Extract the filename and revision hint from a line.
|
|
|
"""
|
|
|
|
|
|
try:
|
|
|
if line1.startswith('--- ') and line2.startswith('+++ '):
|
|
|
l1 = line1[4:].split(None, 1)
|
|
|
old_filename = l1[0].lstrip('a/') if len(l1) >= 1 else None
|
|
|
old_rev = l1[1] if len(l1) == 2 else 'old'
|
|
|
|
|
|
l2 = line2[4:].split(None, 1)
|
|
|
new_filename = l2[0].lstrip('b/') if len(l1) >= 1 else None
|
|
|
new_rev = l2[1] if len(l2) == 2 else 'new'
|
|
|
|
|
|
filename = old_filename if (old_filename !=
|
|
|
'dev/null') else new_filename
|
|
|
|
|
|
return filename, new_rev, old_rev
|
|
|
except (ValueError, IndexError):
|
|
|
pass
|
|
|
|
|
|
return None, None, None
|
|
|
|
|
|
def _parse_gitdiff(self, diffiterator):
|
|
|
def line_decoder(l):
|
|
|
if l.startswith('+') and not l.startswith('+++'):
|
|
|
self.adds += 1
|
|
|
elif l.startswith('-') and not l.startswith('---'):
|
|
|
self.removes += 1
|
|
|
return l.decode('utf8', 'replace')
|
|
|
|
|
|
output = list(diffiterator)
|
|
|
size = len(output)
|
|
|
|
|
|
if size == 2:
|
|
|
l = []
|
|
|
l.extend([output[0]])
|
|
|
l.extend(output[1].splitlines(1))
|
|
|
return map(line_decoder, l)
|
|
|
elif size == 1:
|
|
|
return map(line_decoder, output[0].splitlines(1))
|
|
|
elif size == 0:
|
|
|
return []
|
|
|
|
|
|
raise Exception('wrong size of diff %s' % size)
|
|
|
|
|
|
def _highlight_line_difflib(self, line, next):
|
|
|
"""
|
|
|
Highlight inline changes in both lines.
|
|
|
"""
|
|
|
|
|
|
if line['action'] == 'del':
|
|
|
old, new = line, next
|
|
|
else:
|
|
|
old, new = next, line
|
|
|
|
|
|
oldwords = re.split(r'(\W)', old['line'])
|
|
|
newwords = re.split(r'(\W)', new['line'])
|
|
|
|
|
|
sequence = difflib.SequenceMatcher(None, oldwords, newwords)
|
|
|
|
|
|
oldfragments, newfragments = [], []
|
|
|
for tag, i1, i2, j1, j2 in sequence.get_opcodes():
|
|
|
oldfrag = ''.join(oldwords[i1:i2])
|
|
|
newfrag = ''.join(newwords[j1:j2])
|
|
|
if tag != 'equal':
|
|
|
if oldfrag:
|
|
|
oldfrag = '<del>%s</del>' % oldfrag
|
|
|
if newfrag:
|
|
|
newfrag = '<ins>%s</ins>' % newfrag
|
|
|
oldfragments.append(oldfrag)
|
|
|
newfragments.append(newfrag)
|
|
|
|
|
|
old['line'] = "".join(oldfragments)
|
|
|
new['line'] = "".join(newfragments)
|
|
|
|
|
|
def _highlight_line_udiff(self, line, next):
|
|
|
"""
|
|
|
Highlight inline changes in both lines.
|
|
|
"""
|
|
|
start = 0
|
|
|
limit = min(len(line['line']), len(next['line']))
|
|
|
while start < limit and line['line'][start] == next['line'][start]:
|
|
|
start += 1
|
|
|
end = -1
|
|
|
limit -= start
|
|
|
while -end <= limit and line['line'][end] == next['line'][end]:
|
|
|
end -= 1
|
|
|
end += 1
|
|
|
if start or end:
|
|
|
def do(l):
|
|
|
last = end + len(l['line'])
|
|
|
if l['action'] == 'add':
|
|
|
tag = 'ins'
|
|
|
else:
|
|
|
tag = 'del'
|
|
|
l['line'] = '%s<%s>%s</%s>%s' % (
|
|
|
l['line'][:start],
|
|
|
tag,
|
|
|
l['line'][start:last],
|
|
|
tag,
|
|
|
l['line'][last:]
|
|
|
)
|
|
|
do(line)
|
|
|
do(next)
|
|
|
|
|
|
def _parse_udiff(self):
|
|
|
"""
|
|
|
Parse the diff an return data for the template.
|
|
|
"""
|
|
|
lineiter = self.lines
|
|
|
files = []
|
|
|
try:
|
|
|
line = lineiter.next()
|
|
|
# skip first context
|
|
|
skipfirst = True
|
|
|
while 1:
|
|
|
# continue until we found the old file
|
|
|
if not line.startswith('--- '):
|
|
|
line = lineiter.next()
|
|
|
continue
|
|
|
|
|
|
chunks = []
|
|
|
filename, old_rev, new_rev = \
|
|
|
self._extract_rev(line, lineiter.next())
|
|
|
files.append({
|
|
|
'filename': filename,
|
|
|
'old_revision': old_rev,
|
|
|
'new_revision': new_rev,
|
|
|
'chunks': chunks
|
|
|
})
|
|
|
|
|
|
line = lineiter.next()
|
|
|
while line:
|
|
|
match = self._chunk_re.match(line)
|
|
|
if not match:
|
|
|
break
|
|
|
|
|
|
lines = []
|
|
|
chunks.append(lines)
|
|
|
|
|
|
old_line, old_end, new_line, new_end = \
|
|
|
[int(x or 1) for x in match.groups()[:-1]]
|
|
|
old_line -= 1
|
|
|
new_line -= 1
|
|
|
context = len(match.groups()) == 5
|
|
|
old_end += old_line
|
|
|
new_end += new_line
|
|
|
|
|
|
if context:
|
|
|
if not skipfirst:
|
|
|
lines.append({
|
|
|
'old_lineno': '...',
|
|
|
'new_lineno': '...',
|
|
|
'action': 'context',
|
|
|
'line': line,
|
|
|
})
|
|
|
else:
|
|
|
skipfirst = False
|
|
|
|
|
|
line = lineiter.next()
|
|
|
while old_line < old_end or new_line < new_end:
|
|
|
if line:
|
|
|
command, line = line[0], line[1:]
|
|
|
else:
|
|
|
command = ' '
|
|
|
affects_old = affects_new = False
|
|
|
|
|
|
# ignore those if we don't expect them
|
|
|
if command in '#@':
|
|
|
continue
|
|
|
elif command == '+':
|
|
|
affects_new = True
|
|
|
action = 'add'
|
|
|
elif command == '-':
|
|
|
affects_old = True
|
|
|
action = 'del'
|
|
|
else:
|
|
|
affects_old = affects_new = True
|
|
|
action = 'unmod'
|
|
|
|
|
|
old_line += affects_old
|
|
|
new_line += affects_new
|
|
|
lines.append({
|
|
|
'old_lineno': affects_old and old_line or '',
|
|
|
'new_lineno': affects_new and new_line or '',
|
|
|
'action': action,
|
|
|
'line': line
|
|
|
})
|
|
|
line = lineiter.next()
|
|
|
|
|
|
except StopIteration:
|
|
|
pass
|
|
|
|
|
|
# highlight inline changes
|
|
|
for file in files:
|
|
|
for chunk in chunks:
|
|
|
lineiter = iter(chunk)
|
|
|
#first = True
|
|
|
try:
|
|
|
while 1:
|
|
|
line = lineiter.next()
|
|
|
if line['action'] != 'unmod':
|
|
|
nextline = lineiter.next()
|
|
|
if nextline['action'] == 'unmod' or \
|
|
|
nextline['action'] == line['action']:
|
|
|
continue
|
|
|
self.differ(line, nextline)
|
|
|
except StopIteration:
|
|
|
pass
|
|
|
|
|
|
return files
|
|
|
|
|
|
def prepare(self):
|
|
|
"""
|
|
|
Prepare the passed udiff for HTML rendering. It'l return a list
|
|
|
of dicts
|
|
|
"""
|
|
|
return self._parse_udiff()
|
|
|
|
|
|
def _safe_id(self, idstring):
|
|
|
"""Make a string safe for including in an id attribute.
|
|
|
|
|
|
The HTML spec says that id attributes 'must begin with
|
|
|
a letter ([A-Za-z]) and may be followed by any number
|
|
|
of letters, digits ([0-9]), hyphens ("-"), underscores
|
|
|
("_"), colons (":"), and periods (".")'. These regexps
|
|
|
are slightly over-zealous, in that they remove colons
|
|
|
and periods unnecessarily.
|
|
|
|
|
|
Whitespace is transformed into underscores, and then
|
|
|
anything which is not a hyphen or a character that
|
|
|
matches \w (alphanumerics and underscore) is removed.
|
|
|
|
|
|
"""
|
|
|
# Transform all whitespace to underscore
|
|
|
idstring = re.sub(r'\s', "_", '%s' % idstring)
|
|
|
# Remove everything that is not a hyphen or a member of \w
|
|
|
idstring = re.sub(r'(?!-)\W', "", idstring).lower()
|
|
|
return idstring
|
|
|
|
|
|
def raw_diff(self):
|
|
|
"""
|
|
|
Returns raw string as udiff
|
|
|
"""
|
|
|
udiff_copy = self.copy_iterator()
|
|
|
if self.__format == 'gitdiff':
|
|
|
udiff_copy = self._parse_gitdiff(udiff_copy)
|
|
|
return u''.join(udiff_copy)
|
|
|
|
|
|
def as_html(self, table_class='code-difftable', line_class='line',
|
|
|
new_lineno_class='lineno old', old_lineno_class='lineno new',
|
|
|
code_class='code'):
|
|
|
"""
|
|
|
Return udiff as html table with customized css classes
|
|
|
"""
|
|
|
def _link_to_if(condition, label, url):
|
|
|
"""
|
|
|
Generates a link if condition is meet or just the label if not.
|
|
|
"""
|
|
|
|
|
|
if condition:
|
|
|
return '''<a href="%(url)s">%(label)s</a>''' % {'url': url,
|
|
|
'label': label}
|
|
|
else:
|
|
|
return label
|
|
|
diff_lines = self.prepare()
|
|
|
_html_empty = True
|
|
|
_html = []
|
|
|
_html.append('''<table class="%(table_class)s">\n''' \
|
|
|
% {'table_class': table_class})
|
|
|
for diff in diff_lines:
|
|
|
for line in diff['chunks']:
|
|
|
_html_empty = False
|
|
|
for change in line:
|
|
|
_html.append('''<tr class="%(line_class)s %(action)s">\n''' \
|
|
|
% {'line_class': line_class,
|
|
|
'action': change['action']})
|
|
|
anchor_old_id = ''
|
|
|
anchor_new_id = ''
|
|
|
anchor_old = "%(filename)s_o%(oldline_no)s" % \
|
|
|
{'filename': self._safe_id(diff['filename']),
|
|
|
'oldline_no': change['old_lineno']}
|
|
|
anchor_new = "%(filename)s_n%(oldline_no)s" % \
|
|
|
{'filename': self._safe_id(diff['filename']),
|
|
|
'oldline_no': change['new_lineno']}
|
|
|
cond_old = change['old_lineno'] != '...' and \
|
|
|
change['old_lineno']
|
|
|
cond_new = change['new_lineno'] != '...' and \
|
|
|
change['new_lineno']
|
|
|
if cond_old:
|
|
|
anchor_old_id = 'id="%s"' % anchor_old
|
|
|
if cond_new:
|
|
|
anchor_new_id = 'id="%s"' % anchor_new
|
|
|
###########################################################
|
|
|
# OLD LINE NUMBER
|
|
|
###########################################################
|
|
|
_html.append('''\t<td %(a_id)s class="%(old_lineno_cls)s">''' \
|
|
|
% {'a_id': anchor_old_id,
|
|
|
'old_lineno_cls': old_lineno_class})
|
|
|
|
|
|
_html.append('''%(link)s''' \
|
|
|
% {'link':
|
|
|
_link_to_if(cond_old, change['old_lineno'], '#%s' \
|
|
|
% anchor_old)})
|
|
|
_html.append('''</td>\n''')
|
|
|
###########################################################
|
|
|
# NEW LINE NUMBER
|
|
|
###########################################################
|
|
|
|
|
|
_html.append('''\t<td %(a_id)s class="%(new_lineno_cls)s">''' \
|
|
|
% {'a_id': anchor_new_id,
|
|
|
'new_lineno_cls': new_lineno_class})
|
|
|
|
|
|
_html.append('''%(link)s''' \
|
|
|
% {'link':
|
|
|
_link_to_if(cond_new, change['new_lineno'], '#%s' \
|
|
|
% anchor_new)})
|
|
|
_html.append('''</td>\n''')
|
|
|
###########################################################
|
|
|
# CODE
|
|
|
###########################################################
|
|
|
_html.append('''\t<td class="%(code_class)s">''' \
|
|
|
% {'code_class': code_class})
|
|
|
_html.append('''\n\t\t<pre>%(code)s</pre>\n''' \
|
|
|
% {'code': change['line']})
|
|
|
_html.append('''\t</td>''')
|
|
|
_html.append('''\n</tr>\n''')
|
|
|
_html.append('''</table>''')
|
|
|
if _html_empty:
|
|
|
return None
|
|
|
return ''.join(_html)
|
|
|
|
|
|
def stat(self):
|
|
|
"""
|
|
|
Returns tuple of added, and removed lines for this instance
|
|
|
"""
|
|
|
return self.adds, self.removes
|
|
|
|
