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# -*- coding: utf-8 -*-
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"""
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rhodecode.lib.diffs
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~~~~~~~~~~~~~~~~~~~
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Set of diffing helpers, previously part of vcs
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:created_on: Dec 4, 2011
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:author: marcink
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:copyright: (C) 2010-2012 Marcin Kuzminski <marcin@python-works.com>
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:original copyright: 2007-2008 by Armin Ronacher
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:license: GPLv3, see COPYING for more details.
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"""
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import re
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import io
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import difflib
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import markupsafe
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from itertools import tee, imap
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from mercurial import patch
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from mercurial.mdiff import diffopts
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from mercurial.bundlerepo import bundlerepository
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from mercurial import localrepo
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from pylons.i18n.translation import _
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from rhodecode.lib.vcs.exceptions import VCSError
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from rhodecode.lib.vcs.nodes import FileNode, SubModuleNode
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from rhodecode.lib.helpers import escape
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from rhodecode.lib.utils import EmptyChangeset, make_ui
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def wrap_to_table(str_):
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return '''<table class="code-difftable">
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<tr class="line no-comment">
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<td class="lineno new"></td>
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<td class="code no-comment"><pre>%s</pre></td>
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</tr>
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</table>''' % str_
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def wrapped_diff(filenode_old, filenode_new, cut_off_limit=None,
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ignore_whitespace=True, line_context=3,
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enable_comments=False):
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"""
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returns a wrapped diff into a table, checks for cut_off_limit and presents
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proper message
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"""
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if filenode_old is None:
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filenode_old = FileNode(filenode_new.path, '', EmptyChangeset())
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if filenode_old.is_binary or filenode_new.is_binary:
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diff = wrap_to_table(_('binary file'))
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stats = (0, 0)
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size = 0
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elif cut_off_limit != -1 and (cut_off_limit is None or
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(filenode_old.size < cut_off_limit and filenode_new.size < cut_off_limit)):
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f_gitdiff = get_gitdiff(filenode_old, filenode_new,
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ignore_whitespace=ignore_whitespace,
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context=line_context)
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diff_processor = DiffProcessor(f_gitdiff, format='gitdiff')
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diff = diff_processor.as_html(enable_comments=enable_comments)
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stats = diff_processor.stat()
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size = len(diff or '')
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else:
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diff = wrap_to_table(_('Changeset was too big and was cut off, use '
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'diff menu to display this diff'))
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stats = (0, 0)
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size = 0
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if not diff:
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submodules = filter(lambda o: isinstance(o, SubModuleNode),
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[filenode_new, filenode_old])
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if submodules:
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diff = wrap_to_table(escape('Submodule %r' % submodules[0]))
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else:
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diff = wrap_to_table(_('No changes detected'))
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cs1 = filenode_old.changeset.raw_id
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cs2 = filenode_new.changeset.raw_id
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return size, cs1, cs2, diff, stats
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def get_gitdiff(filenode_old, filenode_new, ignore_whitespace=True, context=3):
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"""
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Returns git style diff between given ``filenode_old`` and ``filenode_new``.
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:param ignore_whitespace: ignore whitespaces in diff
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"""
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# make sure we pass in default context
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context = context or 3
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submodules = filter(lambda o: isinstance(o, SubModuleNode),
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[filenode_new, filenode_old])
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if submodules:
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return ''
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for filenode in (filenode_old, filenode_new):
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if not isinstance(filenode, FileNode):
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raise VCSError("Given object should be FileNode object, not %s"
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% filenode.__class__)
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repo = filenode_new.changeset.repository
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old_raw_id = getattr(filenode_old.changeset, 'raw_id', repo.EMPTY_CHANGESET)
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new_raw_id = getattr(filenode_new.changeset, 'raw_id', repo.EMPTY_CHANGESET)
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vcs_gitdiff = repo.get_diff(old_raw_id, new_raw_id, filenode_new.path,
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ignore_whitespace, context)
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return vcs_gitdiff
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class DiffProcessor(object):
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"""
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Give it a unified diff and it returns a list of the files that were
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mentioned in the diff together with a dict of meta information that
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can be used to render it in a HTML template.
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"""
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_chunk_re = re.compile(r'@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@(.*)')
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def __init__(self, diff, differ='diff', format='gitdiff'):
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"""
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:param diff: a text in diff format or generator
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:param format: format of diff passed, `udiff` or `gitdiff`
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"""
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if isinstance(diff, basestring):
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diff = [diff]
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self.__udiff = diff
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self.__format = format
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self.adds = 0
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self.removes = 0
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if isinstance(self.__udiff, basestring):
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self.lines = iter(self.__udiff.splitlines(1))
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elif self.__format == 'gitdiff':
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udiff_copy = self.copy_iterator()
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self.lines = imap(self.escaper, self._parse_gitdiff(udiff_copy))
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else:
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udiff_copy = self.copy_iterator()
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self.lines = imap(self.escaper, udiff_copy)
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# Select a differ.
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if differ == 'difflib':
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self.differ = self._highlight_line_difflib
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else:
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self.differ = self._highlight_line_udiff
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def escaper(self, string):
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return markupsafe.escape(string)
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def copy_iterator(self):
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"""
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make a fresh copy of generator, we should not iterate thru
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an original as it's needed for repeating operations on
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this instance of DiffProcessor
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"""
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self.__udiff, iterator_copy = tee(self.__udiff)
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return iterator_copy
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def _extract_rev(self, line1, line2):
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"""
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Extract the operation (A/M/D), filename and revision hint from a line.
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"""
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try:
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if line1.startswith('--- ') and line2.startswith('+++ '):
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l1 = line1[4:].split(None, 1)
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old_filename = (l1[0].replace('a/', '', 1)
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if len(l1) >= 1 else None)
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old_rev = l1[1] if len(l1) == 2 else 'old'
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l2 = line2[4:].split(None, 1)
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new_filename = (l2[0].replace('b/', '', 1)
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if len(l1) >= 1 else None)
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new_rev = l2[1] if len(l2) == 2 else 'new'
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filename = (old_filename
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if old_filename != '/dev/null' else new_filename)
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operation = 'D' if new_filename == '/dev/null' else None
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if not operation:
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operation = 'M' if old_filename != '/dev/null' else 'A'
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return operation, filename, new_rev, old_rev
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except (ValueError, IndexError):
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pass
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return None, None, None, None
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def _parse_gitdiff(self, diffiterator):
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def line_decoder(l):
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if l.startswith('+') and not l.startswith('+++'):
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self.adds += 1
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elif l.startswith('-') and not l.startswith('---'):
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self.removes += 1
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return l.decode('utf8', 'replace')
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output = list(diffiterator)
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size = len(output)
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if size == 2:
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l = []
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l.extend([output[0]])
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l.extend(output[1].splitlines(1))
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return map(line_decoder, l)
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elif size == 1:
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return map(line_decoder, output[0].splitlines(1))
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elif size == 0:
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return []
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raise Exception('wrong size of diff %s' % size)
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def _highlight_line_difflib(self, line, next_):
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"""
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Highlight inline changes in both lines.
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"""
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if line['action'] == 'del':
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old, new = line, next_
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else:
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old, new = next_, line
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oldwords = re.split(r'(\W)', old['line'])
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newwords = re.split(r'(\W)', new['line'])
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sequence = difflib.SequenceMatcher(None, oldwords, newwords)
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oldfragments, newfragments = [], []
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for tag, i1, i2, j1, j2 in sequence.get_opcodes():
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oldfrag = ''.join(oldwords[i1:i2])
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newfrag = ''.join(newwords[j1:j2])
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if tag != 'equal':
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if oldfrag:
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oldfrag = '<del>%s</del>' % oldfrag
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if newfrag:
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newfrag = '<ins>%s</ins>' % newfrag
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oldfragments.append(oldfrag)
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newfragments.append(newfrag)
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old['line'] = "".join(oldfragments)
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new['line'] = "".join(newfragments)
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def _highlight_line_udiff(self, line, next_):
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"""
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Highlight inline changes in both lines.
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"""
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start = 0
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limit = min(len(line['line']), len(next_['line']))
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while start < limit and line['line'][start] == next_['line'][start]:
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start += 1
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end = -1
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limit -= start
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while -end <= limit and line['line'][end] == next_['line'][end]:
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end -= 1
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end += 1
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if start or end:
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def do(l):
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last = end + len(l['line'])
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if l['action'] == 'add':
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tag = 'ins'
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else:
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tag = 'del'
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l['line'] = '%s<%s>%s</%s>%s' % (
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l['line'][:start],
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tag,
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l['line'][start:last],
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tag,
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l['line'][last:]
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)
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do(line)
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do(next_)
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def _parse_udiff(self, inline_diff=True):
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"""
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Parse the diff an return data for the template.
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"""
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lineiter = self.lines
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files = []
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try:
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line = lineiter.next()
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while 1:
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# continue until we found the old file
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if not line.startswith('--- '):
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line = lineiter.next()
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continue
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chunks = []
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stats = [0, 0]
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operation, filename, old_rev, new_rev = \
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self._extract_rev(line, lineiter.next())
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files.append({
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'filename': filename,
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'old_revision': old_rev,
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'new_revision': new_rev,
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'chunks': chunks,
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'operation': operation,
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'stats': stats,
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})
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line = lineiter.next()
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while line:
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match = self._chunk_re.match(line)
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if not match:
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break
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lines = []
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chunks.append(lines)
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old_line, old_end, new_line, new_end = \
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[int(x or 1) for x in match.groups()[:-1]]
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old_line -= 1
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new_line -= 1
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gr = match.groups()
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context = len(gr) == 5
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old_end += old_line
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new_end += new_line
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if context:
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# skip context only if it's first line
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if int(gr[0]) > 1:
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lines.append({
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'old_lineno': '...',
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'new_lineno': '...',
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'action': 'context',
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'line': line,
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})
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line = lineiter.next()
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while old_line < old_end or new_line < new_end:
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if line:
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command, line = line[0], line[1:]
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else:
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command = ' '
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affects_old = affects_new = False
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# ignore those if we don't expect them
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if command in '#@':
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continue
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elif command == '+':
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affects_new = True
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action = 'add'
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stats[0] += 1
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elif command == '-':
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affects_old = True
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action = 'del'
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stats[1] += 1
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else:
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affects_old = affects_new = True
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action = 'unmod'
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if line.find('No newline at end of file') != -1:
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lines.append({
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'old_lineno': '...',
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'new_lineno': '...',
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'action': 'context',
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'line': line
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})
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else:
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old_line += affects_old
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new_line += affects_new
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lines.append({
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'old_lineno': affects_old and old_line or '',
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'new_lineno': affects_new and new_line or '',
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'action': action,
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'line': line
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})
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line = lineiter.next()
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except StopIteration:
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pass
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sorter = lambda info: {'A': 0, 'M': 1, 'D': 2}.get(info['operation'])
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if inline_diff is False:
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return sorted(files, key=sorter)
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# highlight inline changes
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for diff_data in files:
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for chunk in diff_data['chunks']:
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lineiter = iter(chunk)
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try:
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while 1:
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line = lineiter.next()
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if line['action'] != 'unmod':
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nextline = lineiter.next()
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if nextline['action'] in ['unmod', 'context'] or \
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nextline['action'] == line['action']:
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continue
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self.differ(line, nextline)
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except StopIteration:
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pass
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return sorted(files, key=sorter)
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def prepare(self, inline_diff=True):
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"""
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Prepare the passed udiff for HTML rendering. It'l return a list
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of dicts
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"""
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return self._parse_udiff(inline_diff=inline_diff)
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def _safe_id(self, idstring):
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"""Make a string safe for including in an id attribute.
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The HTML spec says that id attributes 'must begin with
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a letter ([A-Za-z]) and may be followed by any number
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of letters, digits ([0-9]), hyphens ("-"), underscores
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("_"), colons (":"), and periods (".")'. These regexps
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are slightly over-zealous, in that they remove colons
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and periods unnecessarily.
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Whitespace is transformed into underscores, and then
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anything which is not a hyphen or a character that
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matches \w (alphanumerics and underscore) is removed.
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"""
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# Transform all whitespace to underscore
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idstring = re.sub(r'\s', "_", '%s' % idstring)
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# Remove everything that is not a hyphen or a member of \w
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idstring = re.sub(r'(?!-)\W', "", idstring).lower()
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return idstring
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def raw_diff(self):
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"""
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|
|
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', enable_comments=False, diff_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 diff_lines is None:
|
|
|
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="%(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
|
|
|
|
|
|
|
|
|
class InMemoryBundleRepo(bundlerepository):
|
|
|
def __init__(self, ui, path, bundlestream):
|
|
|
self._tempparent = None
|
|
|
localrepo.localrepository.__init__(self, ui, path)
|
|
|
self.ui.setconfig('phases', 'publish', False)
|
|
|
|
|
|
self.bundle = bundlestream
|
|
|
|
|
|
# dict with the mapping 'filename' -> position in the bundle
|
|
|
self.bundlefilespos = {}
|
|
|
|
|
|
|
|
|
def differ(org_repo, org_ref, other_repo, other_ref, discovery_data=None):
|
|
|
"""
|
|
|
General differ between branches, bookmarks or separate but releated
|
|
|
repositories
|
|
|
|
|
|
:param org_repo:
|
|
|
:type org_repo:
|
|
|
:param org_ref:
|
|
|
:type org_ref:
|
|
|
:param other_repo:
|
|
|
:type other_repo:
|
|
|
:param other_ref:
|
|
|
:type other_ref:
|
|
|
"""
|
|
|
|
|
|
bundlerepo = None
|
|
|
ignore_whitespace = False
|
|
|
context = 3
|
|
|
org_repo = org_repo.scm_instance._repo
|
|
|
other_repo = other_repo.scm_instance._repo
|
|
|
opts = diffopts(git=True, ignorews=ignore_whitespace, context=context)
|
|
|
org_ref = org_ref[1]
|
|
|
other_ref = other_ref[1]
|
|
|
|
|
|
if org_repo != other_repo:
|
|
|
|
|
|
common, incoming, rheads = discovery_data
|
|
|
|
|
|
# create a bundle (uncompressed if other repo is not local)
|
|
|
if other_repo.capable('getbundle') and incoming:
|
|
|
# disable repo hooks here since it's just bundle !
|
|
|
# patch and reset hooks section of UI config to not run any
|
|
|
# hooks on fetching archives with subrepos
|
|
|
for k, _ in other_repo.ui.configitems('hooks'):
|
|
|
other_repo.ui.setconfig('hooks', k, None)
|
|
|
|
|
|
unbundle = other_repo.getbundle('incoming', common=common,
|
|
|
heads=rheads)
|
|
|
|
|
|
buf = io.BytesIO()
|
|
|
while True:
|
|
|
chunk = unbundle._stream.read(1024 * 4)
|
|
|
if not chunk:
|
|
|
break
|
|
|
buf.write(chunk)
|
|
|
|
|
|
buf.seek(0)
|
|
|
# replace chunked _stream with data that can do tell() and seek()
|
|
|
unbundle._stream = buf
|
|
|
|
|
|
ui = make_ui('db')
|
|
|
bundlerepo = InMemoryBundleRepo(ui, path=org_repo.root,
|
|
|
bundlestream=unbundle)
|
|
|
|
|
|
return ''.join(patch.diff(bundlerepo or org_repo,
|
|
|
node1=org_repo[org_ref].node(),
|
|
|
node2=other_repo[other_ref].node(),
|
|
|
opts=opts))
|
|
|
else:
|
|
|
return ''.join(patch.diff(org_repo, node1=org_ref, node2=other_ref,
|
|
|
opts=opts))
|
|
|
|
