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# -*- coding: utf-8 -*-
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# Copyright (C) 2011-2016 RhodeCode GmbH
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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 Affero General Public License, version 3
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# (only), as published by the Free Software Foundation.
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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 Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# This program is dual-licensed. If you wish to learn more about the
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# RhodeCode Enterprise Edition, including its added features, Support services,
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# and proprietary license terms, please see https://rhodecode.com/licenses/
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"""
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Set of diffing helpers, previously part of vcs
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"""
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import collections
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import re
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import difflib
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import logging
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from itertools import tee, imap
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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.vcs.backends.base import EmptyCommit
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from rhodecode.lib.helpers import escape
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from rhodecode.lib.utils2 import safe_unicode
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log = logging.getLogger(__name__)
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class OPS(object):
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ADD = 'A'
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MOD = 'M'
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DEL = 'D'
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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="add-comment-line tooltip" title="Click to comment"><span class="add-comment-content"></span></td>
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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, diff_limit=None, file_limit=None,
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show_full_diff=False, 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 for file and
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whole diff and presents 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, '', EmptyCommit())
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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 = None
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size = 0
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data = None
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elif diff_limit != -1 and (diff_limit is None or
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(filenode_old.size < diff_limit and filenode_new.size < diff_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', diff_limit=diff_limit,
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file_limit=file_limit, show_full_diff=show_full_diff)
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_parsed = diff_processor.prepare()
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diff = diff_processor.as_html(enable_comments=enable_comments)
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stats = _parsed[0]['stats'] if _parsed else None
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size = len(diff or '')
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data = _parsed[0] if _parsed else None
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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 = None
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size = 0
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data = None
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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.commit.raw_id
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cs2 = filenode_new.commit.raw_id
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return size, cs1, cs2, diff, stats, data
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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(
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"Given object should be FileNode object, not %s"
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% filenode.__class__)
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repo = filenode_new.commit.repository
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old_commit = filenode_old.commit or repo.EMPTY_COMMIT
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new_commit = filenode_new.commit
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vcs_gitdiff = repo.get_diff(
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old_commit, new_commit, filenode_new.path,
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ignore_whitespace, context, path1=filenode_old.path)
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return vcs_gitdiff
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NEW_FILENODE = 1
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DEL_FILENODE = 2
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MOD_FILENODE = 3
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RENAMED_FILENODE = 4
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COPIED_FILENODE = 5
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CHMOD_FILENODE = 6
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BIN_FILENODE = 7
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class LimitedDiffContainer(object):
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def __init__(self, diff_limit, cur_diff_size, diff):
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self.diff = diff
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self.diff_limit = diff_limit
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self.cur_diff_size = cur_diff_size
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def __getitem__(self, key):
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return self.diff.__getitem__(key)
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def __iter__(self):
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for l in self.diff:
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yield l
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class Action(object):
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"""
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Contains constants for the action value of the lines in a parsed diff.
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"""
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ADD = 'add'
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DELETE = 'del'
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UNMODIFIED = 'unmod'
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CONTEXT = 'context'
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class DiffProcessor(object):
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"""
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Give it a unified or git 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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.. note:: Unicode handling
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The original diffs are a byte sequence and can contain filenames
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in mixed encodings. This class generally returns `unicode` objects
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since the result is intended for presentation to the user.
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"""
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_chunk_re = re.compile(r'^@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@(.*)')
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_newline_marker = re.compile(r'^\\ No newline at end of file')
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# used for inline highlighter word split
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_token_re = re.compile(r'()(>|<|&|\W+?)')
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def __init__(self, diff, format='gitdiff', diff_limit=None, file_limit=None, show_full_diff=True):
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"""
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:param diff: A `Diff` object representing a diff from a vcs backend
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:param format: format of diff passed, `udiff` or `gitdiff`
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:param diff_limit: define the size of diff that is considered "big"
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based on that parameter cut off will be triggered, set to None
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to show full diff
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"""
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self._diff = 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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# calculate diff size
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self.diff_limit = diff_limit
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self.file_limit = file_limit
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self.show_full_diff = show_full_diff
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self.cur_diff_size = 0
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self.parsed = False
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self.parsed_diff = []
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if format == 'gitdiff':
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self.differ = self._highlight_line_difflib
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self._parser = self._parse_gitdiff
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else:
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self.differ = self._highlight_line_udiff
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self._parser = self._parse_udiff
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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 _escaper(self, string):
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"""
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Escaper for diff escapes special chars and checks the diff limit
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:param string:
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"""
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self.cur_diff_size += len(string)
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if not self.show_full_diff and (self.cur_diff_size > self.diff_limit):
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raise DiffLimitExceeded('Diff Limit Exceeded')
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return safe_unicode(string)\
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.replace('&', '&')\
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.replace('<', '<')\
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.replace('>', '>')
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def _line_counter(self, l):
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"""
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Checks each line and bumps total adds/removes for this diff
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:param l:
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"""
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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 safe_unicode(l)
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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'] == Action.DELETE:
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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 = self._token_re.split(old['line'])
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newwords = self._token_re.split(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'] == 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 _clean_line(self, line, command):
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if command in ['+', '-', ' ']:
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# only modify the line if it's actually a diff thing
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line = line[1:]
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return line
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def _parse_gitdiff(self, inline_diff=True):
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_files = []
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diff_container = lambda arg: arg
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for chunk in self._diff.chunks():
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head = chunk.header
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diff = imap(self._escaper, chunk.diff.splitlines(1))
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raw_diff = chunk.raw
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limited_diff = False
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exceeds_limit = False
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op = None
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stats = {
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'added': 0,
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'deleted': 0,
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'binary': False,
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'ops': {},
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}
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if head['deleted_file_mode']:
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op = OPS.DEL
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stats['binary'] = True
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stats['ops'][DEL_FILENODE] = 'deleted file'
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elif head['new_file_mode']:
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op = OPS.ADD
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stats['binary'] = True
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stats['ops'][NEW_FILENODE] = 'new file %s' % head['new_file_mode']
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else: # modify operation, can be copy, rename or chmod
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# CHMOD
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if head['new_mode'] and head['old_mode']:
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op = OPS.MOD
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stats['binary'] = True
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stats['ops'][CHMOD_FILENODE] = (
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'modified file chmod %s => %s' % (
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head['old_mode'], head['new_mode']))
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# RENAME
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if head['rename_from'] != head['rename_to']:
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op = OPS.MOD
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stats['binary'] = True
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stats['ops'][RENAMED_FILENODE] = (
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'file renamed from %s to %s' % (
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head['rename_from'], head['rename_to']))
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# COPY
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if head.get('copy_from') and head.get('copy_to'):
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op = OPS.MOD
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stats['binary'] = True
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stats['ops'][COPIED_FILENODE] = (
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'file copied from %s to %s' % (
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head['copy_from'], head['copy_to']))
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# If our new parsed headers didn't match anything fallback to
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# old style detection
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if op is None:
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if not head['a_file'] and head['b_file']:
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op = OPS.ADD
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stats['binary'] = True
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stats['ops'][NEW_FILENODE] = 'new file'
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elif head['a_file'] and not head['b_file']:
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op = OPS.DEL
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stats['binary'] = True
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stats['ops'][DEL_FILENODE] = 'deleted file'
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# it's not ADD not DELETE
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if op is None:
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op = OPS.MOD
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stats['binary'] = True
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stats['ops'][MOD_FILENODE] = 'modified file'
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# a real non-binary diff
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if head['a_file'] or head['b_file']:
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try:
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raw_diff, chunks, _stats = self._parse_lines(diff)
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stats['binary'] = False
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stats['added'] = _stats[0]
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stats['deleted'] = _stats[1]
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# explicit mark that it's a modified file
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if op == OPS.MOD:
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stats['ops'][MOD_FILENODE] = 'modified file'
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exceeds_limit = len(raw_diff) > self.file_limit
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# changed from _escaper function so we validate size of
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# each file instead of the whole diff
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# diff will hide big files but still show small ones
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# from my tests, big files are fairly safe to be parsed
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# but the browser is the bottleneck
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if not self.show_full_diff and exceeds_limit:
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raise DiffLimitExceeded('File Limit Exceeded')
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except DiffLimitExceeded:
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diff_container = lambda _diff: \
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LimitedDiffContainer(
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self.diff_limit, self.cur_diff_size, _diff)
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exceeds_limit = len(raw_diff) > self.file_limit
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limited_diff = True
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chunks = []
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else: # GIT format binary patch, or possibly empty diff
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if head['bin_patch']:
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# we have operation already extracted, but we mark simply
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# it's a diff we wont show for binary files
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stats['ops'][BIN_FILENODE] = 'binary diff hidden'
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chunks = []
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if chunks and not self.show_full_diff and op == OPS.DEL:
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# if not full diff mode show deleted file contents
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# TODO: anderson: if the view is not too big, there is no way
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# to see the content of the file
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chunks = []
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|
chunks.insert(0, [{
|
|
|
'old_lineno': '',
|
|
|
'new_lineno': '',
|
|
|
'action': Action.CONTEXT,
|
|
|
'line': msg,
|
|
|
} for _op, msg in stats['ops'].iteritems()
|
|
|
if _op not in [MOD_FILENODE]])
|
|
|
|
|
|
_files.append({
|
|
|
'filename': safe_unicode(head['b_path']),
|
|
|
'old_revision': head['a_blob_id'],
|
|
|
'new_revision': head['b_blob_id'],
|
|
|
'chunks': chunks,
|
|
|
'raw_diff': safe_unicode(raw_diff),
|
|
|
'operation': op,
|
|
|
'stats': stats,
|
|
|
'exceeds_limit': exceeds_limit,
|
|
|
'is_limited_diff': limited_diff,
|
|
|
})
|
|
|
|
|
|
sorter = lambda info: {OPS.ADD: 0, OPS.MOD: 1,
|
|
|
OPS.DEL: 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 (
|
|
|
Action.UNMODIFIED, Action.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]
|
|
|
chunks = []
|
|
|
raw_diff = []
|
|
|
|
|
|
try:
|
|
|
line = lineiter.next()
|
|
|
|
|
|
while line:
|
|
|
raw_diff.append(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': 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 = Action.ADD
|
|
|
stats[0] += 1
|
|
|
elif command == '-':
|
|
|
affects_old = True
|
|
|
action = Action.DELETE
|
|
|
stats[1] += 1
|
|
|
else:
|
|
|
affects_old = affects_new = True
|
|
|
action = Action.UNMODIFIED
|
|
|
|
|
|
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)
|
|
|
})
|
|
|
raw_diff.append(line)
|
|
|
|
|
|
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': Action.CONTEXT,
|
|
|
'line': self._clean_line(line, command)
|
|
|
})
|
|
|
|
|
|
except StopIteration:
|
|
|
pass
|
|
|
return ''.join(raw_diff), 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.
|
|
|
|
|
|
: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 diff as a byte string
|
|
|
"""
|
|
|
return self._diff.raw
|
|
|
|
|
|
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" class="tooltip" title="Click to select line">%(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
|
|
|
|
|
|
if change['action'] != Action.CONTEXT:
|
|
|
anchor_link = True
|
|
|
else:
|
|
|
anchor_link = False
|
|
|
|
|
|
###########################################################
|
|
|
# COMMENT ICON
|
|
|
###########################################################
|
|
|
_html.append('''\t<td class="add-comment-line"><span class="add-comment-content">''')
|
|
|
|
|
|
if enable_comments and change['action'] != Action.CONTEXT:
|
|
|
_html.append('''<a href="#"><span class="icon-comment-add"></span></a>''')
|
|
|
|
|
|
_html.append('''</span></td>\n''')
|
|
|
|
|
|
###########################################################
|
|
|
# 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(anchor_link, 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(anchor_link, change['new_lineno'],
|
|
|
'#%s' % anchor_new)
|
|
|
})
|
|
|
_html.append('''</td>\n''')
|
|
|
###########################################################
|
|
|
# CODE
|
|
|
###########################################################
|
|
|
code_classes = [code_class]
|
|
|
if (not enable_comments or
|
|
|
change['action'] == Action.CONTEXT):
|
|
|
code_classes.append('no-comment')
|
|
|
_html.append('\t<td class="%s">' % ' '.join(code_classes))
|
|
|
_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
|
|
|
|
|
|
def get_context_of_line(
|
|
|
self, path, diff_line=None, context_before=3, context_after=3):
|
|
|
"""
|
|
|
Returns the context lines for the specified diff line.
|
|
|
|
|
|
:type diff_line: :class:`DiffLineNumber`
|
|
|
"""
|
|
|
assert self.parsed, "DiffProcessor is not initialized."
|
|
|
|
|
|
if None not in diff_line:
|
|
|
raise ValueError(
|
|
|
"Cannot specify both line numbers: {}".format(diff_line))
|
|
|
|
|
|
file_diff = self._get_file_diff(path)
|
|
|
chunk, idx = self._find_chunk_line_index(file_diff, diff_line)
|
|
|
|
|
|
first_line_to_include = max(idx - context_before, 0)
|
|
|
first_line_after_context = idx + context_after + 1
|
|
|
context_lines = chunk[first_line_to_include:first_line_after_context]
|
|
|
|
|
|
line_contents = [
|
|
|
_context_line(line) for line in context_lines
|
|
|
if _is_diff_content(line)]
|
|
|
# TODO: johbo: Interim fixup, the diff chunks drop the final newline.
|
|
|
# Once they are fixed, we can drop this line here.
|
|
|
if line_contents:
|
|
|
line_contents[-1] = (
|
|
|
line_contents[-1][0], line_contents[-1][1].rstrip('\n') + '\n')
|
|
|
return line_contents
|
|
|
|
|
|
def find_context(self, path, context, offset=0):
|
|
|
"""
|
|
|
Finds the given `context` inside of the diff.
|
|
|
|
|
|
Use the parameter `offset` to specify which offset the target line has
|
|
|
inside of the given `context`. This way the correct diff line will be
|
|
|
returned.
|
|
|
|
|
|
:param offset: Shall be used to specify the offset of the main line
|
|
|
within the given `context`.
|
|
|
"""
|
|
|
if offset < 0 or offset >= len(context):
|
|
|
raise ValueError(
|
|
|
"Only positive values up to the length of the context "
|
|
|
"minus one are allowed.")
|
|
|
|
|
|
matches = []
|
|
|
file_diff = self._get_file_diff(path)
|
|
|
|
|
|
for chunk in file_diff['chunks']:
|
|
|
context_iter = iter(context)
|
|
|
for line_idx, line in enumerate(chunk):
|
|
|
try:
|
|
|
if _context_line(line) == context_iter.next():
|
|
|
continue
|
|
|
except StopIteration:
|
|
|
matches.append((line_idx, chunk))
|
|
|
context_iter = iter(context)
|
|
|
|
|
|
# Increment position and triger StopIteration
|
|
|
# if we had a match at the end
|
|
|
line_idx += 1
|
|
|
try:
|
|
|
context_iter.next()
|
|
|
except StopIteration:
|
|
|
matches.append((line_idx, chunk))
|
|
|
|
|
|
effective_offset = len(context) - offset
|
|
|
found_at_diff_lines = [
|
|
|
_line_to_diff_line_number(chunk[idx - effective_offset])
|
|
|
for idx, chunk in matches]
|
|
|
|
|
|
return found_at_diff_lines
|
|
|
|
|
|
def _get_file_diff(self, path):
|
|
|
for file_diff in self.parsed_diff:
|
|
|
if file_diff['filename'] == path:
|
|
|
break
|
|
|
else:
|
|
|
raise FileNotInDiffException("File {} not in diff".format(path))
|
|
|
return file_diff
|
|
|
|
|
|
def _find_chunk_line_index(self, file_diff, diff_line):
|
|
|
for chunk in file_diff['chunks']:
|
|
|
for idx, line in enumerate(chunk):
|
|
|
if line['old_lineno'] == diff_line.old:
|
|
|
return chunk, idx
|
|
|
if line['new_lineno'] == diff_line.new:
|
|
|
return chunk, idx
|
|
|
raise LineNotInDiffException(
|
|
|
"The line {} is not part of the diff.".format(diff_line))
|
|
|
|
|
|
|
|
|
def _is_diff_content(line):
|
|
|
return line['action'] in (
|
|
|
Action.UNMODIFIED, Action.ADD, Action.DELETE)
|
|
|
|
|
|
|
|
|
def _context_line(line):
|
|
|
return (line['action'], line['line'])
|
|
|
|
|
|
|
|
|
DiffLineNumber = collections.namedtuple('DiffLineNumber', ['old', 'new'])
|
|
|
|
|
|
|
|
|
def _line_to_diff_line_number(line):
|
|
|
new_line_no = line['new_lineno'] or None
|
|
|
old_line_no = line['old_lineno'] or None
|
|
|
return DiffLineNumber(old=old_line_no, new=new_line_no)
|
|
|
|
|
|
|
|
|
class FileNotInDiffException(Exception):
|
|
|
"""
|
|
|
Raised when the context for a missing file is requested.
|
|
|
|
|
|
If you request the context for a line in a file which is not part of the
|
|
|
given diff, then this exception is raised.
|
|
|
"""
|
|
|
|
|
|
|
|
|
class LineNotInDiffException(Exception):
|
|
|
"""
|
|
|
Raised when the context for a missing line is requested.
|
|
|
|
|
|
If you request the context for a line in a file and this line is not
|
|
|
part of the given diff, then this exception is raised.
|
|
|
"""
|
|
|
|
|
|
|
|
|
class DiffLimitExceeded(Exception):
|
|
|
pass
|
|
|
|
