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release: Finish preparation for 4.18.0
release: Finish preparation for 4.18.0

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# -*- coding: utf-8 -*-
# Copyright (C) 2011-2019 RhodeCode GmbH
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU General Public License for more details.
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/
import logging
import difflib
from itertools import groupby
from pygments import lex
from pygments.formatters.html import _get_ttype_class as pygment_token_class
from pygments.lexers.special import TextLexer, Token
from pygments.lexers import get_lexer_by_name
from pyramid import compat
from rhodecode.lib.helpers import (
get_lexer_for_filenode, html_escape, get_custom_lexer)
from rhodecode.lib.utils2 import AttributeDict, StrictAttributeDict, safe_unicode
from rhodecode.lib.vcs.nodes import FileNode
from rhodecode.lib.vcs.exceptions import VCSError, NodeDoesNotExistError
from rhodecode.lib.diff_match_patch import diff_match_patch
from rhodecode.lib.diffs import LimitedDiffContainer, DEL_FILENODE, BIN_FILENODE
plain_text_lexer = get_lexer_by_name(
'text', stripall=False, stripnl=False, ensurenl=False)
log = logging.getLogger(__name__)
def filenode_as_lines_tokens(filenode, lexer=None):
org_lexer = lexer
lexer = lexer or get_lexer_for_filenode(filenode)
log.debug('Generating file node pygment tokens for %s, %s, org_lexer:%s',
lexer, filenode, org_lexer)
content = filenode.content
tokens = tokenize_string(content, lexer)
lines = split_token_stream(tokens, content)
rv = list(lines)
return rv
def tokenize_string(content, lexer):
Use pygments to tokenize some content based on a lexer
ensuring all original new lines and whitespace is preserved
lexer.stripall = False
lexer.stripnl = False
lexer.ensurenl = False
if isinstance(lexer, TextLexer):
lexed = [(Token.Text, content)]
lexed = lex(content, lexer)
for token_type, token_text in lexed:
yield pygment_token_class(token_type), token_text
def split_token_stream(tokens, content):
Take a list of (TokenType, text) tuples and split them by a string
split_token_stream([(TEXT, 'some\ntext'), (TEXT, 'more\n')])
[(TEXT, 'some'), (TEXT, 'text'),
(TEXT, 'more'), (TEXT, 'text')]
token_buffer = []
for token_class, token_text in tokens:
parts = token_text.split('\n')
for part in parts[:-1]:
token_buffer.append((token_class, part))
yield token_buffer
token_buffer = []
token_buffer.append((token_class, parts[-1]))
if token_buffer:
yield token_buffer
elif content:
# this is a special case, we have the content, but tokenization didn't produce
# any results. THis can happen if know file extensions like .css have some bogus
# unicode content without any newline characters
yield [(pygment_token_class(Token.Text), content)]
def filenode_as_annotated_lines_tokens(filenode):
Take a file node and return a list of annotations => lines, if no annotation
is found, it will be None.
(annotation1, [
(1, line1_tokens_list),
(2, line2_tokens_list),
(annotation2, [
(3, line1_tokens_list),
(None, [
(4, line1_tokens_list),
(annotation1, [
(5, line1_tokens_list),
(6, line2_tokens_list),
commit_cache = {} # cache commit_getter lookups
def _get_annotation(commit_id, commit_getter):
if commit_id not in commit_cache:
commit_cache[commit_id] = commit_getter()
return commit_cache[commit_id]
annotation_lookup = {
line_no: _get_annotation(commit_id, commit_getter)
for line_no, commit_id, commit_getter, line_content
in filenode.annotate
annotations_lines = ((annotation_lookup.get(line_no), line_no, tokens)
for line_no, tokens
in enumerate(filenode_as_lines_tokens(filenode), 1))
grouped_annotations_lines = groupby(annotations_lines, lambda x: x[0])
for annotation, group in grouped_annotations_lines:
yield (
annotation, [(line_no, tokens)
for (_, line_no, tokens) in group]
def render_tokenstream(tokenstream):
result = []
for token_class, token_ops_texts in rollup_tokenstream(tokenstream):
if token_class:
result.append(u'<span class="%s">' % token_class)
for op_tag, token_text in token_ops_texts:
if op_tag:
result.append(u'<%s>' % op_tag)
# NOTE(marcink): in some cases of mixed encodings, we might run into
# troubles in the html_escape, in this case we say unicode force on token_text
# that would ensure "correct" data even with the cost of rendered
escaped_text = html_escape(token_text)
except TypeError:
escaped_text = html_escape(safe_unicode(token_text))
# TODO: dan: investigate showing hidden characters like space/nl/tab
# escaped_text = escaped_text.replace(' ', '<sp> </sp>')
# escaped_text = escaped_text.replace('\n', '<nl>\n</nl>')
# escaped_text = escaped_text.replace('\t', '<tab>\t</tab>')
if op_tag:
result.append(u'</%s>' % op_tag)
html = ''.join(result)
return html
def rollup_tokenstream(tokenstream):
Group a token stream of the format:
('class', 'op', 'text')
('class', 'text')
[('op1', 'text'),
('op2', 'text')]),
[('op3', 'text')])]
This is used to get the minimal tags necessary when
rendering to html eg for a token stream ie.
<span class="A"><ins>he</ins>llo</span>
<span class="A"><ins>he</ins></span><span class="A">llo</span>
If a 2 tuple is passed in, the output op will be an empty string.
>>> rollup_tokenstream([('classA', '', 'h'),
('classA', 'del', 'ell'),
('classA', '', 'o'),
('classB', '', ' '),
('classA', '', 'the'),
('classA', '', 're'),
[('classA', [('', 'h'), ('del', 'ell'), ('', 'o')],
('classB', [('', ' ')],
('classA', [('', 'there')]]
if tokenstream and len(tokenstream[0]) == 2:
tokenstream = ((t[0], '', t[1]) for t in tokenstream)
result = []
for token_class, op_list in groupby(tokenstream, lambda t: t[0]):
ops = []
for token_op, token_text_list in groupby(op_list, lambda o: o[1]):
text_buffer = []
for t_class, t_op, t_text in token_text_list:
ops.append((token_op, ''.join(text_buffer)))
result.append((token_class, ops))
return result
def tokens_diff(old_tokens, new_tokens, use_diff_match_patch=True):
Converts a list of (token_class, token_text) tuples to a list of
(token_class, token_op, token_text) tuples where token_op is one of
('ins', 'del', '')
:param old_tokens: list of (token_class, token_text) tuples of old line
:param new_tokens: list of (token_class, token_text) tuples of new line
:param use_diff_match_patch: boolean, will use google's diff match patch
library which has options to 'smooth' out the character by character
differences making nicer ins/del blocks
old_tokens_result = []
new_tokens_result = []
similarity = difflib.SequenceMatcher(None,
''.join(token_text for token_class, token_text in old_tokens),
''.join(token_text for token_class, token_text in new_tokens)
if similarity < 0.6: # return, the blocks are too different
for token_class, token_text in old_tokens:
old_tokens_result.append((token_class, '', token_text))
for token_class, token_text in new_tokens:
new_tokens_result.append((token_class, '', token_text))
return old_tokens_result, new_tokens_result, similarity
token_sequence_matcher = difflib.SequenceMatcher(None,
[x[1] for x in old_tokens],
[x[1] for x in new_tokens])
for tag, o1, o2, n1, n2 in token_sequence_matcher.get_opcodes():
# check the differences by token block types first to give a more
# nicer "block" level replacement vs character diffs
if tag == 'equal':
for token_class, token_text in old_tokens[o1:o2]:
old_tokens_result.append((token_class, '', token_text))
for token_class, token_text in new_tokens[n1:n2]:
new_tokens_result.append((token_class, '', token_text))
elif tag == 'delete':
for token_class, token_text in old_tokens[o1:o2]:
old_tokens_result.append((token_class, 'del', token_text))
elif tag == 'insert':
for token_class, token_text in new_tokens[n1:n2]:
new_tokens_result.append((token_class, 'ins', token_text))
elif tag == 'replace':
# if same type token blocks must be replaced, do a diff on the
# characters in the token blocks to show individual changes
old_char_tokens = []
new_char_tokens = []
for token_class, token_text in old_tokens[o1:o2]:
for char in token_text:
old_char_tokens.append((token_class, char))
for token_class, token_text in new_tokens[n1:n2]:
for char in token_text:
new_char_tokens.append((token_class, char))
old_string = ''.join([token_text for
token_class, token_text in old_char_tokens])
new_string = ''.join([token_text for
token_class, token_text in new_char_tokens])
char_sequence = difflib.SequenceMatcher(
None, old_string, new_string)
copcodes = char_sequence.get_opcodes()
obuffer, nbuffer = [], []
if use_diff_match_patch:
dmp = diff_match_patch()
dmp.Diff_EditCost = 11 # TODO: dan: extract this to a setting
reps = dmp.diff_main(old_string, new_string)
a, b = 0, 0
for op, rep in reps:
l = len(rep)
if op == 0:
for i, c in enumerate(rep):
obuffer.append((old_char_tokens[a+i][0], '', c))
nbuffer.append((new_char_tokens[b+i][0], '', c))
a += l
b += l
elif op == -1:
for i, c in enumerate(rep):
obuffer.append((old_char_tokens[a+i][0], 'del', c))
a += l
elif op == 1:
for i, c in enumerate(rep):
nbuffer.append((new_char_tokens[b+i][0], 'ins', c))
b += l
for ctag, co1, co2, cn1, cn2 in copcodes:
if ctag == 'equal':
for token_class, token_text in old_char_tokens[co1:co2]:
obuffer.append((token_class, '', token_text))
for token_class, token_text in new_char_tokens[cn1:cn2]:
nbuffer.append((token_class, '', token_text))
elif ctag == 'delete':
for token_class, token_text in old_char_tokens[co1:co2]:
obuffer.append((token_class, 'del', token_text))
elif ctag == 'insert':
for token_class, token_text in new_char_tokens[cn1:cn2]:
nbuffer.append((token_class, 'ins', token_text))
elif ctag == 'replace':
for token_class, token_text in old_char_tokens[co1:co2]:
obuffer.append((token_class, 'del', token_text))
for token_class, token_text in new_char_tokens[cn1:cn2]:
nbuffer.append((token_class, 'ins', token_text))
return old_tokens_result, new_tokens_result, similarity
def diffset_node_getter(commit):
def get_node(fname):
return commit.get_node(fname)
except NodeDoesNotExistError:
return None
return get_node
class DiffSet(object):
An object for parsing the diff result from diffs.DiffProcessor and
adding highlighting, side by side/unified renderings and line diffs
HL_REAL = 'REAL' # highlights using original file, slow
HL_FAST = 'FAST' # highlights using just the line, fast but not correct
# in the case of multiline code
HL_NONE = 'NONE' # no highlighting, fastest
def __init__(self, highlight_mode=HL_REAL, repo_name=None,
source_node_getter=lambda filename: None,
target_node_getter=lambda filename: None,
source_nodes=None, target_nodes=None,
# files over this size will use fast highlighting
max_file_size_limit=150 * 1024,
self.highlight_mode = highlight_mode
self.highlighted_filenodes = {}
self.source_node_getter = source_node_getter
self.target_node_getter = target_node_getter
self.source_nodes = source_nodes or {}
self.target_nodes = target_nodes or {}
self.repo_name = repo_name
self.target_repo_name = target_repo_name or repo_name
self.source_repo_name = source_repo_name or repo_name
self.max_file_size_limit = max_file_size_limit
def render_patchset(self, patchset, source_ref=None, target_ref=None):
diffset = AttributeDict(dict(
limited_diff=isinstance(patchset, LimitedDiffContainer),
for patch in patchset:
diffset.file_stats[patch['filename']] = patch['stats']
filediff = self.render_patch(patch)
filediff.diffset = StrictAttributeDict(dict(
diffset.changed_files += 1
if not patch['stats']['binary']:
diffset.lines_added += patch['stats']['added']
diffset.lines_deleted += patch['stats']['deleted']
return diffset
_lexer_cache = {}
def _get_lexer_for_filename(self, filename, filenode=None):
# cached because we might need to call it twice for source/target
if filename not in self._lexer_cache:
if filenode:
lexer = filenode.lexer
extension = filenode.extension
lexer = FileNode.get_lexer(filename=filename)
extension = filename.split('.')[-1]
lexer = get_custom_lexer(extension) or lexer
self._lexer_cache[filename] = lexer
return self._lexer_cache[filename]
def render_patch(self, patch):
log.debug('rendering diff for %r', patch['filename'])
source_filename = patch['original_filename']
target_filename = patch['filename']
source_lexer = plain_text_lexer
target_lexer = plain_text_lexer
if not patch['stats']['binary']:
node_hl_mode = self.HL_NONE if patch['chunks'] == [] else None
hl_mode = node_hl_mode or self.highlight_mode
if hl_mode == self.HL_REAL:
if (source_filename and patch['operation'] in ('D', 'M')
and source_filename not in self.source_nodes):
self.source_nodes[source_filename] = (
if (target_filename and patch['operation'] in ('A', 'M')
and target_filename not in self.target_nodes):
self.target_nodes[target_filename] = (
elif hl_mode == self.HL_FAST:
source_lexer = self._get_lexer_for_filename(source_filename)
target_lexer = self._get_lexer_for_filename(target_filename)
source_file = self.source_nodes.get(source_filename, source_filename)
target_file = self.target_nodes.get(target_filename, target_filename)
raw_id_uid = ''
if self.source_nodes.get(source_filename):
raw_id_uid = self.source_nodes[source_filename].commit.raw_id
if not raw_id_uid and self.target_nodes.get(target_filename):
# in case this is a new file we only have it in target
raw_id_uid = self.target_nodes[target_filename].commit.raw_id
source_filenode, target_filenode = None, None
# TODO: dan: FileNode.lexer works on the content of the file - which
# can be slow - issue #4289 explains a lexer clean up - which once
# done can allow caching a lexer for a filenode to avoid the file lookup
if isinstance(source_file, FileNode):
source_filenode = source_file
#source_lexer = source_file.lexer
source_lexer = self._get_lexer_for_filename(source_filename)
source_file.lexer = source_lexer
if isinstance(target_file, FileNode):
target_filenode = target_file
#target_lexer = target_file.lexer
target_lexer = self._get_lexer_for_filename(target_filename)
target_file.lexer = target_lexer
source_file_path, target_file_path = None, None
if source_filename != '/dev/null':
source_file_path = source_filename
if target_filename != '/dev/null':
target_file_path = target_filename
source_file_type = source_lexer.name
target_file_type = target_lexer.name
filediff = AttributeDict({
'source_file_path': source_file_path,
'target_file_path': target_file_path,
'source_filenode': source_filenode,
'target_filenode': target_filenode,
'source_file_type': target_file_type,
'target_file_type': source_file_type,
'patch': {'filename': patch['filename'], 'stats': patch['stats']},
'operation': patch['operation'],
'source_mode': patch['stats']['old_mode'],
'target_mode': patch['stats']['new_mode'],
'limited_diff': patch['is_limited_diff'],
'hunks': [],
'hunk_ops': None,
'diffset': self,
'raw_id': raw_id_uid,
file_chunks = patch['chunks'][1:]
for hunk in file_chunks:
hunkbit = self.parse_hunk(hunk, source_file, target_file)
hunkbit.source_file_path = source_file_path
hunkbit.target_file_path = target_file_path
# Simulate hunk on OPS type line which doesn't really contain any diff
# this allows commenting on those
if not file_chunks:
actions = []
for op_id, op_text in filediff.patch['stats']['ops'].items():
if op_id == DEL_FILENODE:
actions.append(u'file was removed')
elif op_id == BIN_FILENODE:
actions.append(u'binary diff hidden')
action_line = u'NO CONTENT: ' + \
u', '.join(actions) or u'UNDEFINED_ACTION'
hunk_ops = {'source_length': 0, 'source_start': 0,
'lines': [
{'new_lineno': 0, 'old_lineno': 1,
'action': 'unmod-no-hl', 'line': action_line}
'section_header': u'', 'target_start': 1, 'target_length': 1}
hunkbit = self.parse_hunk(hunk_ops, source_file, target_file)
hunkbit.source_file_path = source_file_path
hunkbit.target_file_path = target_file_path
filediff.hunk_ops = hunkbit
return filediff
def parse_hunk(self, hunk, source_file, target_file):
result = AttributeDict(dict(
before, after = [], []
for line in hunk['lines']:
if line['action'] in ['unmod', 'unmod-no-hl']:
no_hl = line['action'] == 'unmod-no-hl'
self.parse_lines(before, after, source_file, target_file, no_hl=no_hl))
elif line['action'] == 'add':
elif line['action'] == 'del':
elif line['action'] == 'old-no-nl':
elif line['action'] == 'new-no-nl':
all_actions = [x['action'] for x in after] + [x['action'] for x in before]
no_hl = {x for x in all_actions} == {'unmod-no-hl'}
self.parse_lines(before, after, source_file, target_file, no_hl=no_hl))
# NOTE(marcink): we must keep list() call here so we can cache the result...
result.unified = list(self.as_unified(result.lines))
result.sideside = result.lines
return result
def parse_lines(self, before_lines, after_lines, source_file, target_file,
# TODO: dan: investigate doing the diff comparison and fast highlighting
# on the entire before and after buffered block lines rather than by
# line, this means we can get better 'fast' highlighting if the context
# allows it - eg.
# line 4: """
# line 5: this gets highlighted as a string
# line 6: """
lines = []
before_newline = AttributeDict()
after_newline = AttributeDict()
if before_lines and before_lines[-1]['action'] == 'old-no-nl':
before_newline_line = before_lines.pop(-1)
before_newline.content = '\n {}'.format(
[(x[0], '', x[1])
for x in [('nonl', before_newline_line['line'])]]))
if after_lines and after_lines[-1]['action'] == 'new-no-nl':
after_newline_line = after_lines.pop(-1)
after_newline.content = '\n {}'.format(
[(x[0], '', x[1])
for x in [('nonl', after_newline_line['line'])]]))
while before_lines or after_lines:
before, after = None, None
before_tokens, after_tokens = None, None
if before_lines:
before = before_lines.pop(0)
if after_lines:
after = after_lines.pop(0)
original = AttributeDict()
modified = AttributeDict()
if before:
if before['action'] == 'old-no-nl':
before_tokens = [('nonl', before['line'])]
before_tokens = self.get_line_tokens(
line_text=before['line'], line_number=before['old_lineno'],
input_file=source_file, no_hl=no_hl)
original.lineno = before['old_lineno']
original.content = before['line']
original.action = self.action_to_op(before['action'])
original.get_comment_args = (
source_file, 'o', before['old_lineno'])
if after:
if after['action'] == 'new-no-nl':
after_tokens = [('nonl', after['line'])]
after_tokens = self.get_line_tokens(
line_text=after['line'], line_number=after['new_lineno'],
input_file=target_file, no_hl=no_hl)
modified.lineno = after['new_lineno']
modified.content = after['line']
modified.action = self.action_to_op(after['action'])
modified.get_comment_args = (target_file, 'n', after['new_lineno'])
# diff the lines
if before_tokens and after_tokens:
o_tokens, m_tokens, similarity = tokens_diff(
before_tokens, after_tokens)
original.content = render_tokenstream(o_tokens)
modified.content = render_tokenstream(m_tokens)
elif before_tokens:
original.content = render_tokenstream(
[(x[0], '', x[1]) for x in before_tokens])
elif after_tokens:
modified.content = render_tokenstream(
[(x[0], '', x[1]) for x in after_tokens])
if not before_lines and before_newline:
original.content += before_newline.content
before_newline = None
if not after_lines and after_newline:
modified.content += after_newline.content
after_newline = None
'original': original,
'modified': modified,
return lines
def get_line_tokens(self, line_text, line_number, input_file=None, no_hl=False):
filenode = None
filename = None
if isinstance(input_file, compat.string_types):
filename = input_file
elif isinstance(input_file, FileNode):
filenode = input_file
filename = input_file.unicode_path
hl_mode = self.HL_NONE if no_hl else self.highlight_mode
if hl_mode == self.HL_REAL and filenode:
lexer = self._get_lexer_for_filename(filename)
file_size_allowed = input_file.size < self.max_file_size_limit
if line_number and file_size_allowed:
return self.get_tokenized_filenode_line(
input_file, line_number, lexer)
if hl_mode in (self.HL_REAL, self.HL_FAST) and filename:
lexer = self._get_lexer_for_filename(filename)
return list(tokenize_string(line_text, lexer))
return list(tokenize_string(line_text, plain_text_lexer))
def get_tokenized_filenode_line(self, filenode, line_number, lexer=None):
if filenode not in self.highlighted_filenodes:
tokenized_lines = filenode_as_lines_tokens(filenode, lexer)
self.highlighted_filenodes[filenode] = tokenized_lines
return self.highlighted_filenodes[filenode][line_number - 1]
except Exception:
return [('', u'rhodecode diff rendering error')]
def action_to_op(self, action):
return {
'add': '+',
'del': '-',
'unmod': ' ',
'unmod-no-hl': ' ',
'old-no-nl': ' ',
'new-no-nl': ' ',
}.get(action, action)
def as_unified(self, lines):
Return a generator that yields the lines of a diff in unified order
def generator():
buf = []
for line in lines:
if buf and not line.original or line.original.action == ' ':
for b in buf:
yield b
buf = []
if line.original:
if line.original.action == ' ':
yield (line.original.lineno, line.modified.lineno,
line.original.action, line.original.content,
if line.original.action == '-':
yield (line.original.lineno, None,
line.original.action, line.original.content,
if line.modified.action == '+':
None, line.modified.lineno,
line.modified.action, line.modified.content,
if line.modified:
yield (None, line.modified.lineno,
line.modified.action, line.modified.content,
for b in buf:
yield b
return generator()