forked from OSchip/llvm-project
274 lines
9.1 KiB
Python
Executable File
274 lines
9.1 KiB
Python
Executable File
#!/usr/bin/env python
|
|
#
|
|
#===- clang-tidy-diff.py - ClangTidy Diff Checker -----------*- python -*--===#
|
|
#
|
|
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
# See https://llvm.org/LICENSE.txt for license information.
|
|
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
#
|
|
#===-----------------------------------------------------------------------===#
|
|
|
|
r"""
|
|
ClangTidy Diff Checker
|
|
======================
|
|
|
|
This script reads input from a unified diff, runs clang-tidy on all changed
|
|
files and outputs clang-tidy warnings in changed lines only. This is useful to
|
|
detect clang-tidy regressions in the lines touched by a specific patch.
|
|
Example usage for git/svn users:
|
|
|
|
git diff -U0 HEAD^ | clang-tidy-diff.py -p1
|
|
svn diff --diff-cmd=diff -x-U0 | \
|
|
clang-tidy-diff.py -fix -checks=-*,modernize-use-override
|
|
|
|
"""
|
|
|
|
import argparse
|
|
import glob
|
|
import json
|
|
import multiprocessing
|
|
import os
|
|
import re
|
|
import shutil
|
|
import subprocess
|
|
import sys
|
|
import tempfile
|
|
import threading
|
|
import traceback
|
|
|
|
try:
|
|
import yaml
|
|
except ImportError:
|
|
yaml = None
|
|
|
|
is_py2 = sys.version[0] == '2'
|
|
|
|
if is_py2:
|
|
import Queue as queue
|
|
else:
|
|
import queue as queue
|
|
|
|
|
|
def run_tidy(task_queue, lock, timeout):
|
|
watchdog = None
|
|
while True:
|
|
command = task_queue.get()
|
|
try:
|
|
proc = subprocess.Popen(command,
|
|
stdout=subprocess.PIPE,
|
|
stderr=subprocess.PIPE)
|
|
|
|
if timeout is not None:
|
|
watchdog = threading.Timer(timeout, proc.kill)
|
|
watchdog.start()
|
|
|
|
stdout, stderr = proc.communicate()
|
|
|
|
with lock:
|
|
sys.stdout.write(stdout.decode('utf-8') + '\n')
|
|
sys.stdout.flush()
|
|
if stderr:
|
|
sys.stderr.write(stderr.decode('utf-8') + '\n')
|
|
sys.stderr.flush()
|
|
except Exception as e:
|
|
with lock:
|
|
sys.stderr.write('Failed: ' + str(e) + ': '.join(command) + '\n')
|
|
finally:
|
|
with lock:
|
|
if not (timeout is None or watchdog is None):
|
|
if not watchdog.is_alive():
|
|
sys.stderr.write('Terminated by timeout: ' +
|
|
' '.join(command) + '\n')
|
|
watchdog.cancel()
|
|
task_queue.task_done()
|
|
|
|
|
|
def start_workers(max_tasks, tidy_caller, task_queue, lock, timeout):
|
|
for _ in range(max_tasks):
|
|
t = threading.Thread(target=tidy_caller, args=(task_queue, lock, timeout))
|
|
t.daemon = True
|
|
t.start()
|
|
|
|
|
|
def merge_replacement_files(tmpdir, mergefile):
|
|
"""Merge all replacement files in a directory into a single file"""
|
|
# The fixes suggested by clang-tidy >= 4.0.0 are given under
|
|
# the top level key 'Diagnostics' in the output yaml files
|
|
mergekey = "Diagnostics"
|
|
merged = []
|
|
for replacefile in glob.iglob(os.path.join(tmpdir, '*.yaml')):
|
|
content = yaml.safe_load(open(replacefile, 'r'))
|
|
if not content:
|
|
continue # Skip empty files.
|
|
merged.extend(content.get(mergekey, []))
|
|
|
|
if merged:
|
|
# MainSourceFile: The key is required by the definition inside
|
|
# include/clang/Tooling/ReplacementsYaml.h, but the value
|
|
# is actually never used inside clang-apply-replacements,
|
|
# so we set it to '' here.
|
|
output = {'MainSourceFile': '', mergekey: merged}
|
|
with open(mergefile, 'w') as out:
|
|
yaml.safe_dump(output, out)
|
|
else:
|
|
# Empty the file:
|
|
open(mergefile, 'w').close()
|
|
|
|
|
|
def main():
|
|
parser = argparse.ArgumentParser(description=
|
|
'Run clang-tidy against changed files, and '
|
|
'output diagnostics only for modified '
|
|
'lines.')
|
|
parser.add_argument('-clang-tidy-binary', metavar='PATH',
|
|
default='clang-tidy',
|
|
help='path to clang-tidy binary')
|
|
parser.add_argument('-p', metavar='NUM', default=0,
|
|
help='strip the smallest prefix containing P slashes')
|
|
parser.add_argument('-regex', metavar='PATTERN', default=None,
|
|
help='custom pattern selecting file paths to check '
|
|
'(case sensitive, overrides -iregex)')
|
|
parser.add_argument('-iregex', metavar='PATTERN', default=
|
|
r'.*\.(cpp|cc|c\+\+|cxx|c|cl|h|hpp|m|mm|inc)',
|
|
help='custom pattern selecting file paths to check '
|
|
'(case insensitive, overridden by -regex)')
|
|
parser.add_argument('-j', type=int, default=1,
|
|
help='number of tidy instances to be run in parallel.')
|
|
parser.add_argument('-timeout', type=int, default=None,
|
|
help='timeout per each file in seconds.')
|
|
parser.add_argument('-fix', action='store_true', default=False,
|
|
help='apply suggested fixes')
|
|
parser.add_argument('-checks',
|
|
help='checks filter, when not specified, use clang-tidy '
|
|
'default',
|
|
default='')
|
|
parser.add_argument('-use-color', action='store_true',
|
|
help='Use colors in output')
|
|
parser.add_argument('-path', dest='build_path',
|
|
help='Path used to read a compile command database.')
|
|
if yaml:
|
|
parser.add_argument('-export-fixes', metavar='FILE', dest='export_fixes',
|
|
help='Create a yaml file to store suggested fixes in, '
|
|
'which can be applied with clang-apply-replacements.')
|
|
parser.add_argument('-extra-arg', dest='extra_arg',
|
|
action='append', default=[],
|
|
help='Additional argument to append to the compiler '
|
|
'command line.')
|
|
parser.add_argument('-extra-arg-before', dest='extra_arg_before',
|
|
action='append', default=[],
|
|
help='Additional argument to prepend to the compiler '
|
|
'command line.')
|
|
parser.add_argument('-quiet', action='store_true', default=False,
|
|
help='Run clang-tidy in quiet mode')
|
|
clang_tidy_args = []
|
|
argv = sys.argv[1:]
|
|
if '--' in argv:
|
|
clang_tidy_args.extend(argv[argv.index('--'):])
|
|
argv = argv[:argv.index('--')]
|
|
|
|
args = parser.parse_args(argv)
|
|
|
|
# Extract changed lines for each file.
|
|
filename = None
|
|
lines_by_file = {}
|
|
for line in sys.stdin:
|
|
match = re.search('^\+\+\+\ \"?(.*?/){%s}([^ \t\n\"]*)' % args.p, line)
|
|
if match:
|
|
filename = match.group(2)
|
|
if filename is None:
|
|
continue
|
|
|
|
if args.regex is not None:
|
|
if not re.match('^%s$' % args.regex, filename):
|
|
continue
|
|
else:
|
|
if not re.match('^%s$' % args.iregex, filename, re.IGNORECASE):
|
|
continue
|
|
|
|
match = re.search('^@@.*\+(\d+)(,(\d+))?', line)
|
|
if match:
|
|
start_line = int(match.group(1))
|
|
line_count = 1
|
|
if match.group(3):
|
|
line_count = int(match.group(3))
|
|
if line_count == 0:
|
|
continue
|
|
end_line = start_line + line_count - 1
|
|
lines_by_file.setdefault(filename, []).append([start_line, end_line])
|
|
|
|
if not any(lines_by_file):
|
|
print("No relevant changes found.")
|
|
sys.exit(0)
|
|
|
|
max_task_count = args.j
|
|
if max_task_count == 0:
|
|
max_task_count = multiprocessing.cpu_count()
|
|
max_task_count = min(len(lines_by_file), max_task_count)
|
|
|
|
tmpdir = None
|
|
if yaml and args.export_fixes:
|
|
tmpdir = tempfile.mkdtemp()
|
|
|
|
# Tasks for clang-tidy.
|
|
task_queue = queue.Queue(max_task_count)
|
|
# A lock for console output.
|
|
lock = threading.Lock()
|
|
|
|
# Run a pool of clang-tidy workers.
|
|
start_workers(max_task_count, run_tidy, task_queue, lock, args.timeout)
|
|
|
|
# Form the common args list.
|
|
common_clang_tidy_args = []
|
|
if args.fix:
|
|
common_clang_tidy_args.append('-fix')
|
|
if args.checks != '':
|
|
common_clang_tidy_args.append('-checks=' + args.checks)
|
|
if args.quiet:
|
|
common_clang_tidy_args.append('-quiet')
|
|
if args.build_path is not None:
|
|
common_clang_tidy_args.append('-p=%s' % args.build_path)
|
|
if args.use_color:
|
|
common_clang_tidy_args.append('--use-color')
|
|
for arg in args.extra_arg:
|
|
common_clang_tidy_args.append('-extra-arg=%s' % arg)
|
|
for arg in args.extra_arg_before:
|
|
common_clang_tidy_args.append('-extra-arg-before=%s' % arg)
|
|
|
|
for name in lines_by_file:
|
|
line_filter_json = json.dumps(
|
|
[{"name": name, "lines": lines_by_file[name]}],
|
|
separators=(',', ':'))
|
|
|
|
# Run clang-tidy on files containing changes.
|
|
command = [args.clang_tidy_binary]
|
|
command.append('-line-filter=' + line_filter_json)
|
|
if yaml and args.export_fixes:
|
|
# Get a temporary file. We immediately close the handle so clang-tidy can
|
|
# overwrite it.
|
|
(handle, tmp_name) = tempfile.mkstemp(suffix='.yaml', dir=tmpdir)
|
|
os.close(handle)
|
|
command.append('-export-fixes=' + tmp_name)
|
|
command.extend(common_clang_tidy_args)
|
|
command.append(name)
|
|
command.extend(clang_tidy_args)
|
|
|
|
task_queue.put(command)
|
|
|
|
# Wait for all threads to be done.
|
|
task_queue.join()
|
|
|
|
if yaml and args.export_fixes:
|
|
print('Writing fixes to ' + args.export_fixes + ' ...')
|
|
try:
|
|
merge_replacement_files(tmpdir, args.export_fixes)
|
|
except:
|
|
sys.stderr.write('Error exporting fixes.\n')
|
|
traceback.print_exc()
|
|
|
|
if tmpdir:
|
|
shutil.rmtree(tmpdir)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|