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authorSteve Block <steveblock@google.com>2010-04-27 16:31:00 +0100
committerSteve Block <steveblock@google.com>2010-05-11 14:42:12 +0100
commitdcc8cf2e65d1aa555cce12431a16547e66b469ee (patch)
tree92a8d65cd5383bca9749f5327fb5e440563926e6 /WebKitTools/Scripts/webkitpy/diff_parser.py
parentccac38a6b48843126402088a309597e682f40fe6 (diff)
downloadexternal_webkit-dcc8cf2e65d1aa555cce12431a16547e66b469ee.zip
external_webkit-dcc8cf2e65d1aa555cce12431a16547e66b469ee.tar.gz
external_webkit-dcc8cf2e65d1aa555cce12431a16547e66b469ee.tar.bz2
Merge webkit.org at r58033 : Initial merge by git
Change-Id: If006c38561af287c50cd578d251629b51e4d8cd1
Diffstat (limited to 'WebKitTools/Scripts/webkitpy/diff_parser.py')
-rw-r--r--WebKitTools/Scripts/webkitpy/diff_parser.py162
1 files changed, 0 insertions, 162 deletions
diff --git a/WebKitTools/Scripts/webkitpy/diff_parser.py b/WebKitTools/Scripts/webkitpy/diff_parser.py
deleted file mode 100644
index 7dce7e8..0000000
--- a/WebKitTools/Scripts/webkitpy/diff_parser.py
+++ /dev/null
@@ -1,162 +0,0 @@
-# Copyright (C) 2009 Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-# * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-# * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-# * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""WebKit's Python module for interacting with patches."""
-
-import logging
-import re
-
-
-_regexp_compile_cache = {}
-
-
-def match(pattern, string):
- """Matches the string with the pattern, caching the compiled regexp."""
- if not pattern in _regexp_compile_cache:
- _regexp_compile_cache[pattern] = re.compile(pattern)
- return _regexp_compile_cache[pattern].match(string)
-
-
-def git_diff_to_svn_diff(line):
- """Converts a git formatted diff line to a svn formatted line.
-
- Args:
- line: A string representing a line of the diff.
- """
- conversion_patterns = (("^diff --git \w/(.+) \w/(?P<FilePath>.+)", lambda matched: "Index: " + matched.group('FilePath') + "\n"),
- ("^new file.*", lambda matched: "\n"),
- ("^index [0-9a-f]{7}\.\.[0-9a-f]{7} [0-9]{6}", lambda matched: "===================================================================\n"),
- ("^--- \w/(?P<FilePath>.+)", lambda matched: "--- " + matched.group('FilePath') + "\n"),
- ("^\+\+\+ \w/(?P<FilePath>.+)", lambda matched: "+++ " + matched.group('FilePath') + "\n"))
-
- for pattern, conversion in conversion_patterns:
- matched = match(pattern, line)
- if matched:
- return conversion(matched)
- return line
-
-
-def get_diff_converter(first_diff_line):
- """Gets a converter function of diff lines.
-
- Args:
- first_diff_line: The first filename line of a diff file.
- If this line is git formatted, we'll return a
- converter from git to SVN.
- """
- if match(r"^diff --git \w/", first_diff_line):
- return git_diff_to_svn_diff
- return lambda input: input
-
-
-_INITIAL_STATE = 1
-_DECLARED_FILE_PATH = 2
-_PROCESSING_CHUNK = 3
-
-
-class DiffFile:
- """Contains the information for one file in a patch.
-
- The field "lines" is a list which contains tuples in this format:
- (deleted_line_number, new_line_number, line_string)
- If deleted_line_number is zero, it means this line is newly added.
- If new_line_number is zero, it means this line is deleted.
- """
-
- def __init__(self, filename):
- self.filename = filename
- self.lines = []
-
- def add_new_line(self, line_number, line):
- self.lines.append((0, line_number, line))
-
- def add_deleted_line(self, line_number, line):
- self.lines.append((line_number, 0, line))
-
- def add_unchanged_line(self, deleted_line_number, new_line_number, line):
- self.lines.append((deleted_line_number, new_line_number, line))
-
-
-class DiffParser:
- """A parser for a patch file.
-
- The field "files" is a dict whose key is the filename and value is
- a DiffFile object.
- """
-
- def __init__(self, diff_input):
- """Parses a diff.
-
- Args:
- diff_input: An iterable object.
- """
- state = _INITIAL_STATE
-
- self.files = {}
- current_file = None
- old_diff_line = None
- new_diff_line = None
- for line in diff_input:
- line = line.rstrip("\n")
- if state == _INITIAL_STATE:
- transform_line = get_diff_converter(line)
- line = transform_line(line)
-
- file_declaration = match(r"^Index: (?P<FilePath>.+)", line)
- if file_declaration:
- filename = file_declaration.group('FilePath')
- current_file = DiffFile(filename)
- self.files[filename] = current_file
- state = _DECLARED_FILE_PATH
- continue
-
- lines_changed = match(r"^@@ -(?P<OldStartLine>\d+)(,\d+)? \+(?P<NewStartLine>\d+)(,\d+)? @@", line)
- if lines_changed:
- if state != _DECLARED_FILE_PATH and state != _PROCESSING_CHUNK:
- logging.error('Unexpected line change without file path declaration: %r' % line)
- old_diff_line = int(lines_changed.group('OldStartLine'))
- new_diff_line = int(lines_changed.group('NewStartLine'))
- state = _PROCESSING_CHUNK
- continue
-
- if state == _PROCESSING_CHUNK:
- if line.startswith('+'):
- current_file.add_new_line(new_diff_line, line[1:])
- new_diff_line += 1
- elif line.startswith('-'):
- current_file.add_deleted_line(old_diff_line, line[1:])
- old_diff_line += 1
- elif line.startswith(' '):
- current_file.add_unchanged_line(old_diff_line, new_diff_line, line[1:])
- old_diff_line += 1
- new_diff_line += 1
- elif line == '\\ No newline at end of file':
- # Nothing to do. We may still have some added lines.
- pass
- else:
- logging.error('Unexpected diff format when parsing a chunk: %r' % line)