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#!/usr/bin/env python3
#
# This file is part of GCC.
#
# GCC is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 3, or (at your option) any later
# version.
#
# GCC is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>. */
import os
import re
import sys
from itertools import takewhile
from dateutil.parser import parse
from git_commit import GitCommit, GitInfo, decode_path
from unidiff import PatchSet, PatchedFile
DATE_PREFIX = 'Date: '
FROM_PREFIX = 'From: '
SUBJECT_PREFIX = 'Subject: '
subject_patch_regex = re.compile(r'^\[PATCH( \d+/\d+)?\] ')
unidiff_supports_renaming = hasattr(PatchedFile(), 'is_rename')
class GitEmail(GitCommit):
def __init__(self, filename):
self.filename = filename
diff = PatchSet.from_filename(filename)
date = None
author = None
subject = ''
subject_last = False
with open(self.filename, 'r') as f:
lines = f.read().splitlines()
lines = list(takewhile(lambda line: line != '---', lines))
for line in lines:
if line.startswith(DATE_PREFIX):
date = parse(line[len(DATE_PREFIX):])
elif line.startswith(FROM_PREFIX):
author = GitCommit.format_git_author(line[len(FROM_PREFIX):])
elif line.startswith(SUBJECT_PREFIX):
subject = line[len(SUBJECT_PREFIX):]
subject_last = True
elif subject_last and line.startswith(' '):
subject += line
elif line == '':
break
else:
subject_last = False
if subject:
subject = subject_patch_regex.sub('', subject)
header = list(takewhile(lambda line: line != '', lines))
# Note: commit message consists of email subject, empty line, email body
message = [subject] + lines[len(header):]
modified_files = []
for f in diff:
# Strip "a/" and "b/" prefixes
source = decode_path(f.source_file)[2:]
target = decode_path(f.target_file)[2:]
if f.is_added_file:
t = 'A'
elif f.is_removed_file:
t = 'D'
elif unidiff_supports_renaming and f.is_rename:
# Consider that renamed files are two operations: the deletion
# of the original name and the addition of the new one.
modified_files.append((source, 'D'))
t = 'A'
else:
t = 'M'
modified_files.append((target if t != 'D' else source, t))
git_info = GitInfo(None, date, author, message, modified_files)
super().__init__(git_info,
commit_to_info_hook=lambda x: None)
def show_help():
print("""usage: git_email.py [--help] [patch file ...]
Check git ChangeLog format of a patch
With zero arguments, process every patch file in the
./patches directory.
With one argument, process the named patch file.
Patch files must be in 'git format-patch' format.""")
sys.exit(0)
if __name__ == '__main__':
if len(sys.argv) == 2 and (sys.argv[1] == '-h' or sys.argv[1] == '--help'):
show_help()
if len(sys.argv) == 1:
allfiles = []
for root, _dirs, files in os.walk('patches'):
for f in files:
full = os.path.join(root, f)
allfiles.append(full)
success = 0
for full in sorted(allfiles):
email = GitEmail(full, False)
print(email.filename)
if email.success:
success += 1
print(' OK')
else:
for error in email.errors:
print(' ERR: %s' % error)
print()
print('Successfully parsed: %d/%d' % (success, len(allfiles)))
else:
email = GitEmail(sys.argv[1])
if email.success:
print('OK')
email.print_output()
else:
if not email.info.lines:
print('Error: patch contains no parsed lines', file=sys.stderr)
email.print_errors()
sys.exit(1)
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