##// END OF EJS Templates
backport fix...
backport fix fixed password refill in login form when wrong password was given It's better to not refill the passwords on wrong credentials given. Standard behaviour on all pages are making the password blank

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diffs.py
722 lines | 26.3 KiB | text/x-python | PythonLexer
# -*- coding: utf-8 -*-
"""
rhodecode.lib.diffs
~~~~~~~~~~~~~~~~~~~
Set of diffing helpers, previously part of vcs
:created_on: Dec 4, 2011
:author: marcink
:copyright: (C) 2010-2012 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
import logging
from itertools import tee, imap
from pylons.i18n.translation import _
from rhodecode.lib.vcs.exceptions import VCSError
from rhodecode.lib.vcs.nodes import FileNode, SubModuleNode
from rhodecode.lib.vcs.backends.base import EmptyChangeset
from rhodecode.lib.helpers import escape
from rhodecode.lib.utils2 import safe_unicode, safe_str
log = logging.getLogger(__name__)
def wrap_to_table(str_):
return '''<table class="code-difftable">
<tr class="line no-comment">
<td class="lineno new"></td>
<td class="code no-comment"><pre>%s</pre></td>
</tr>
</table>''' % str_
def wrapped_diff(filenode_old, filenode_new, cut_off_limit=None,
ignore_whitespace=True, line_context=3,
enable_comments=False):
"""
returns a wrapped diff into a table, checks for cut_off_limit and presents
proper message
"""
if filenode_old is None:
filenode_old = FileNode(filenode_new.path, '', EmptyChangeset())
if filenode_old.is_binary or filenode_new.is_binary:
diff = wrap_to_table(_('Binary file'))
stats = (0, 0)
size = 0
elif cut_off_limit != -1 and (cut_off_limit is None or
(filenode_old.size < cut_off_limit and filenode_new.size < cut_off_limit)):
f_gitdiff = get_gitdiff(filenode_old, filenode_new,
ignore_whitespace=ignore_whitespace,
context=line_context)
diff_processor = DiffProcessor(f_gitdiff, format='gitdiff')
diff = diff_processor.as_html(enable_comments=enable_comments)
stats = diff_processor.stat()
size = len(diff or '')
else:
diff = wrap_to_table(_('Changeset was too big and was cut off, use '
'diff menu to display this diff'))
stats = (0, 0)
size = 0
if not diff:
submodules = filter(lambda o: isinstance(o, SubModuleNode),
[filenode_new, filenode_old])
if submodules:
diff = wrap_to_table(escape('Submodule %r' % submodules[0]))
else:
diff = wrap_to_table(_('No changes detected'))
cs1 = filenode_old.changeset.raw_id
cs2 = filenode_new.changeset.raw_id
return size, cs1, cs2, diff, stats
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
"""
# make sure we pass in default context
context = context or 3
submodules = filter(lambda o: isinstance(o, SubModuleNode),
[filenode_new, filenode_old])
if submodules:
return ''
for filenode in (filenode_old, filenode_new):
if not isinstance(filenode, FileNode):
raise VCSError("Given object should be FileNode object, not %s"
% filenode.__class__)
repo = filenode_new.changeset.repository
old_raw_id = getattr(filenode_old.changeset, 'raw_id', repo.EMPTY_CHANGESET)
new_raw_id = getattr(filenode_new.changeset, 'raw_id', repo.EMPTY_CHANGESET)
vcs_gitdiff = repo.get_diff(old_raw_id, new_raw_id, filenode_new.path,
ignore_whitespace, context)
return vcs_gitdiff
NEW_FILENODE = 1
DEL_FILENODE = 2
MOD_FILENODE = 3
RENAMED_FILENODE = 4
COPIED_FILENODE = 5
CHMOD_FILENODE = 6
BIN_FILENODE = 7
class DiffLimitExceeded(Exception):
pass
class LimitedDiffContainer(object):
def __init__(self, diff_limit, cur_diff_size, diff):
self.diff = diff
self.diff_limit = diff_limit
self.cur_diff_size = cur_diff_size
def __iter__(self):
for l in self.diff:
yield l
class DiffProcessor(object):
"""
Give it a unified or git 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+))? @@(.*)')
_newline_marker = re.compile(r'^\\ No newline at end of file')
_git_header_re = re.compile(r"""
#^diff[ ]--git
[ ]a/(?P<a_path>.+?)[ ]b/(?P<b_path>.+?)\n
(?:^similarity[ ]index[ ](?P<similarity_index>\d+)%\n
^rename[ ]from[ ](?P<rename_from>\S+)\n
^rename[ ]to[ ](?P<rename_to>\S+)(?:\n|$))?
(?:^old[ ]mode[ ](?P<old_mode>\d+)\n
^new[ ]mode[ ](?P<new_mode>\d+)(?:\n|$))?
(?:^new[ ]file[ ]mode[ ](?P<new_file_mode>.+)(?:\n|$))?
(?:^deleted[ ]file[ ]mode[ ](?P<deleted_file_mode>.+)(?:\n|$))?
(?:^index[ ](?P<a_blob_id>[0-9A-Fa-f]+)
\.\.(?P<b_blob_id>[0-9A-Fa-f]+)[ ]?(?P<b_mode>.+)?(?:\n|$))?
(?:^(?P<bin_patch>GIT[ ]binary[ ]patch)(?:\n|$))?
(?:^---[ ](a/(?P<a_file>.+)|/dev/null)(?:\n|$))?
(?:^\+\+\+[ ](b/(?P<b_file>.+)|/dev/null)(?:\n|$))?
""", re.VERBOSE | re.MULTILINE)
_hg_header_re = re.compile(r"""
#^diff[ ]--git
[ ]a/(?P<a_path>.+?)[ ]b/(?P<b_path>.+?)\n
(?:^old[ ]mode[ ](?P<old_mode>\d+)\n
^new[ ]mode[ ](?P<new_mode>\d+)(?:\n|$))?
(?:^similarity[ ]index[ ](?P<similarity_index>\d+)%(?:\n|$))?
(?:^rename[ ]from[ ](?P<rename_from>\S+)\n
^rename[ ]to[ ](?P<rename_to>\S+)(?:\n|$))?
(?:^copy[ ]from[ ](?P<copy_from>\S+)\n
^copy[ ]to[ ](?P<copy_to>\S+)(?:\n|$))?
(?:^new[ ]file[ ]mode[ ](?P<new_file_mode>.+)(?:\n|$))?
(?:^deleted[ ]file[ ]mode[ ](?P<deleted_file_mode>.+)(?:\n|$))?
(?:^index[ ](?P<a_blob_id>[0-9A-Fa-f]+)
\.\.(?P<b_blob_id>[0-9A-Fa-f]+)[ ]?(?P<b_mode>.+)?(?:\n|$))?
(?:^(?P<bin_patch>GIT[ ]binary[ ]patch)(?:\n|$))?
(?:^---[ ](a/(?P<a_file>.+)|/dev/null)(?:\n|$))?
(?:^\+\+\+[ ](b/(?P<b_file>.+)|/dev/null)(?:\n|$))?
""", re.VERBOSE | re.MULTILINE)
#used for inline highlighter word split
_token_re = re.compile(r'()(&gt;|&lt;|&amp;|\W+?)')
def __init__(self, diff, vcs='hg', format='gitdiff', diff_limit=None):
"""
:param diff: a text in diff format
:param vcs: type of version controll hg or git
:param format: format of diff passed, `udiff` or `gitdiff`
:param diff_limit: define the size of diff that is considered "big"
based on that parameter cut off will be triggered, set to None
to show full diff
"""
if not isinstance(diff, basestring):
raise Exception('Diff must be a basestring got %s instead' % type(diff))
self._diff = diff
self._format = format
self.adds = 0
self.removes = 0
# calculate diff size
self.diff_size = len(diff)
self.diff_limit = diff_limit
self.cur_diff_size = 0
self.parsed = False
self.parsed_diff = []
self.vcs = vcs
if format == 'gitdiff':
self.differ = self._highlight_line_difflib
self._parser = self._parse_gitdiff
else:
self.differ = self._highlight_line_udiff
self._parser = self._parse_udiff
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 _escaper(self, string):
"""
Escaper for diff escapes special chars and checks the diff limit
:param string:
"""
self.cur_diff_size += len(string)
# escaper gets iterated on each .next() call and it checks if each
# parsed line doesn't exceed the diff limit
if self.diff_limit is not None and self.cur_diff_size > self.diff_limit:
raise DiffLimitExceeded('Diff Limit Exceeded')
return safe_unicode(string).replace('&', '&amp;')\
.replace('<', '&lt;')\
.replace('>', '&gt;')
def _line_counter(self, l):
"""
Checks each line and bumps total adds/removes for this diff
:param l:
"""
if l.startswith('+') and not l.startswith('+++'):
self.adds += 1
elif l.startswith('-') and not l.startswith('---'):
self.removes += 1
return safe_unicode(l)
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 = self._token_re.split(old['line'])
newwords = self._token_re.split(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 _get_header(self, diff_chunk):
"""
parses the diff header, and returns parts, and leftover diff
parts consists of 14 elements::
a_path, b_path, similarity_index, rename_from, rename_to,
old_mode, new_mode, new_file_mode, deleted_file_mode,
a_blob_id, b_blob_id, b_mode, a_file, b_file
:param diff_chunk:
"""
if self.vcs == 'git':
match = self._git_header_re.match(diff_chunk)
diff = diff_chunk[match.end():]
return match.groupdict(), imap(self._escaper, diff.splitlines(1))
elif self.vcs == 'hg':
match = self._hg_header_re.match(diff_chunk)
diff = diff_chunk[match.end():]
return match.groupdict(), imap(self._escaper, diff.splitlines(1))
else:
raise Exception('VCS type %s is not supported' % self.vcs)
def _clean_line(self, line, command):
if command in ['+', '-', ' ']:
#only modify the line if it's actually a diff thing
line = line[1:]
return line
def _parse_gitdiff(self, inline_diff=True):
_files = []
diff_container = lambda arg: arg
##split the diff in chunks of separate --git a/file b/file chunks
for raw_diff in ('\n' + self._diff).split('\ndiff --git')[1:]:
head, diff = self._get_header(raw_diff)
op = None
stats = {
'added': 0,
'deleted': 0,
'binary': False,
'ops': {},
}
if head['deleted_file_mode']:
op = 'D'
stats['binary'] = True
stats['ops'][DEL_FILENODE] = 'deleted file'
elif head['new_file_mode']:
op = 'A'
stats['binary'] = True
stats['ops'][NEW_FILENODE] = 'new file %s' % head['new_file_mode']
else: # modify operation, can be cp, rename, chmod
# CHMOD
if head['new_mode'] and head['old_mode']:
op = 'M'
stats['binary'] = True
stats['ops'][CHMOD_FILENODE] = ('modified file chmod %s => %s'
% (head['old_mode'], head['new_mode']))
# RENAME
if (head['rename_from'] and head['rename_to']
and head['rename_from'] != head['rename_to']):
op = 'M'
stats['binary'] = True
stats['ops'][RENAMED_FILENODE] = ('file renamed from %s to %s'
% (head['rename_from'], head['rename_to']))
# COPY
if head.get('copy_from') and head.get('copy_to'):
op = 'M'
stats['binary'] = True
stats['ops'][COPIED_FILENODE] = ('file copied from %s to %s'
% (head['copy_from'], head['copy_to']))
# FALL BACK: detect missed old style add or remove
if op is None:
if not head['a_file'] and head['b_file']:
op = 'A'
stats['binary'] = True
stats['ops'][NEW_FILENODE] = 'new file'
elif head['a_file'] and not head['b_file']:
op = 'D'
stats['binary'] = True
stats['ops'][DEL_FILENODE] = 'deleted file'
# it's not ADD not DELETE
if op is None:
op = 'M'
stats['binary'] = True
stats['ops'][MOD_FILENODE] = 'modified file'
# a real non-binary diff
if head['a_file'] or head['b_file']:
try:
chunks, _stats = self._parse_lines(diff)
stats['binary'] = False
stats['added'] = _stats[0]
stats['deleted'] = _stats[1]
# explicit mark that it's a modified file
if op == 'M':
stats['ops'][MOD_FILENODE] = 'modified file'
except DiffLimitExceeded:
diff_container = lambda _diff: \
LimitedDiffContainer(self.diff_limit,
self.cur_diff_size, _diff)
break
else: # GIT binary patch (or empty diff)
# GIT Binary patch
if head['bin_patch']:
stats['ops'][BIN_FILENODE] = 'binary diff not shown'
chunks = []
if op == 'D' and chunks:
chunks = []
chunks.insert(0, [{
'old_lineno': '',
'new_lineno': '',
'action': 'context',
'line': msg,
} for _op, msg in stats['ops'].iteritems()
if _op not in [MOD_FILENODE]])
_files.append({
'filename': head['b_path'],
'old_revision': head['a_blob_id'],
'new_revision': head['b_blob_id'],
'chunks': chunks,
'operation': op,
'stats': stats,
})
sorter = lambda info: {'A': 0, 'M': 1, 'D': 2}.get(info['operation'])
if not inline_diff:
return diff_container(sorted(_files, key=sorter))
# highlight inline changes
for diff_data in _files:
for chunk in diff_data['chunks']:
lineiter = iter(chunk)
try:
while 1:
line = lineiter.next()
if line['action'] not in ['unmod', 'context']:
nextline = lineiter.next()
if nextline['action'] in ['unmod', 'context'] or \
nextline['action'] == line['action']:
continue
self.differ(line, nextline)
except StopIteration:
pass
return diff_container(sorted(_files, key=sorter))
def _parse_udiff(self, inline_diff=True):
raise NotImplementedError()
def _parse_lines(self, diff):
"""
Parse the diff an return data for the template.
"""
lineiter = iter(diff)
stats = [0, 0]
try:
chunks = []
line = lineiter.next()
while line:
lines = []
chunks.append(lines)
match = self._chunk_re.match(line)
if not match:
break
gr = match.groups()
(old_line, old_end,
new_line, new_end) = [int(x or 1) for x in gr[:-1]]
old_line -= 1
new_line -= 1
context = len(gr) == 5
old_end += old_line
new_end += new_line
if context:
# skip context only if it's first line
if int(gr[0]) > 1:
lines.append({
'old_lineno': '...',
'new_lineno': '...',
'action': 'context',
'line': line,
})
line = lineiter.next()
while old_line < old_end or new_line < new_end:
command = ' '
if line:
command = line[0]
affects_old = affects_new = False
# ignore those if we don't expect them
if command in '#@':
continue
elif command == '+':
affects_new = True
action = 'add'
stats[0] += 1
elif command == '-':
affects_old = True
action = 'del'
stats[1] += 1
else:
affects_old = affects_new = True
action = 'unmod'
if not self._newline_marker.match(line):
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': self._clean_line(line, command)
})
line = lineiter.next()
if self._newline_marker.match(line):
# we need to append to lines, since this is not
# counted in the line specs of diff
lines.append({
'old_lineno': '...',
'new_lineno': '...',
'action': 'context',
'line': self._clean_line(line, command)
})
except StopIteration:
pass
return chunks, stats
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 prepare(self, inline_diff=True):
"""
Prepare the passed udiff for HTML rendering. It'l return a list
of dicts with diff information
"""
parsed = self._parser(inline_diff=inline_diff)
self.parsed = True
self.parsed_diff = parsed
return parsed
def as_raw(self, diff_lines=None):
"""
Returns raw string diff
"""
return self._diff
#return u''.join(imap(self._line_counter, self._diff.splitlines(1)))
def as_html(self, table_class='code-difftable', line_class='line',
old_lineno_class='lineno old', new_lineno_class='lineno new',
code_class='code', enable_comments=False, parsed_lines=None):
"""
Return given diff 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
if not self.parsed:
self.prepare()
diff_lines = self.parsed_diff
if parsed_lines:
diff_lines = parsed_lines
_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="%(lc)s %(action)s">\n''' % {
'lc': 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="%(olc)s">''' % {
'a_id': anchor_old_id,
'olc': old_lineno_class
})
_html.append('''%(link)s''' % {
'link': _link_to_if(True, change['old_lineno'],
'#%s' % anchor_old)
})
_html.append('''</td>\n''')
###########################################################
# NEW LINE NUMBER
###########################################################
_html.append('''\t<td %(a_id)s class="%(nlc)s">''' % {
'a_id': anchor_new_id,
'nlc': new_lineno_class
})
_html.append('''%(link)s''' % {
'link': _link_to_if(True, change['new_lineno'],
'#%s' % anchor_new)
})
_html.append('''</td>\n''')
###########################################################
# CODE
###########################################################
comments = '' if enable_comments else 'no-comment'
_html.append('''\t<td class="%(cc)s %(inc)s">''' % {
'cc': code_class,
'inc': comments
})
_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