338 lines
12 KiB
Python
Executable File
338 lines
12 KiB
Python
Executable File
#!/usr/bin/env python
|
|
#
|
|
#===- run-clang-tidy.py - Parallel clang-tidy runner --------*- 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
|
|
#
|
|
#===-----------------------------------------------------------------------===#
|
|
# FIXME: Integrate with clang-tidy-diff.py
|
|
|
|
|
|
"""
|
|
Parallel clang-tidy runner
|
|
==========================
|
|
|
|
Runs clang-tidy over all files in a compilation database. Requires clang-tidy
|
|
and clang-apply-replacements in $PATH.
|
|
|
|
Example invocations.
|
|
- Run clang-tidy on all files in the current working directory with a default
|
|
set of checks and show warnings in the cpp files and all project headers.
|
|
run-clang-tidy.py $PWD
|
|
|
|
- Fix all header guards.
|
|
run-clang-tidy.py -fix -checks=-*,llvm-header-guard
|
|
|
|
- Fix all header guards included from clang-tidy and header guards
|
|
for clang-tidy headers.
|
|
run-clang-tidy.py -fix -checks=-*,llvm-header-guard extra/clang-tidy \
|
|
-header-filter=extra/clang-tidy
|
|
|
|
Compilation database setup:
|
|
http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html
|
|
"""
|
|
|
|
from __future__ import print_function
|
|
|
|
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 find_compilation_database(path):
|
|
"""Adjusts the directory until a compilation database is found."""
|
|
result = './'
|
|
while not os.path.isfile(os.path.join(result, path)):
|
|
if os.path.realpath(result) == '/':
|
|
print('Error: could not find compilation database.')
|
|
sys.exit(1)
|
|
result += '../'
|
|
return os.path.realpath(result)
|
|
|
|
|
|
def make_absolute(f, directory):
|
|
if os.path.isabs(f):
|
|
return f
|
|
return os.path.normpath(os.path.join(directory, f))
|
|
|
|
|
|
def get_tidy_invocation(f, clang_tidy_binary, checks, tmpdir, build_path,
|
|
header_filter, allow_enabling_alpha_checkers,
|
|
extra_arg, extra_arg_before, quiet, config):
|
|
"""Gets a command line for clang-tidy."""
|
|
start = [clang_tidy_binary, '--use-color']
|
|
if allow_enabling_alpha_checkers:
|
|
start.append('-allow-enabling-analyzer-alpha-checkers')
|
|
if header_filter is not None:
|
|
start.append('-header-filter=' + header_filter)
|
|
if checks:
|
|
start.append('-checks=' + checks)
|
|
if tmpdir is not None:
|
|
start.append('-export-fixes')
|
|
# Get a temporary file. We immediately close the handle so clang-tidy can
|
|
# overwrite it.
|
|
(handle, name) = tempfile.mkstemp(suffix='.yaml', dir=tmpdir)
|
|
os.close(handle)
|
|
start.append(name)
|
|
for arg in extra_arg:
|
|
start.append('-extra-arg=%s' % arg)
|
|
for arg in extra_arg_before:
|
|
start.append('-extra-arg-before=%s' % arg)
|
|
start.append('-p=' + build_path)
|
|
if quiet:
|
|
start.append('-quiet')
|
|
if config:
|
|
start.append('-config=' + config)
|
|
start.append(f)
|
|
return 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 check_clang_apply_replacements_binary(args):
|
|
"""Checks if invoking supplied clang-apply-replacements binary works."""
|
|
try:
|
|
subprocess.check_call([args.clang_apply_replacements_binary, '--version'])
|
|
except:
|
|
print('Unable to run clang-apply-replacements. Is clang-apply-replacements '
|
|
'binary correctly specified?', file=sys.stderr)
|
|
traceback.print_exc()
|
|
sys.exit(1)
|
|
|
|
|
|
def apply_fixes(args, tmpdir):
|
|
"""Calls clang-apply-fixes on a given directory."""
|
|
invocation = [args.clang_apply_replacements_binary]
|
|
if args.format:
|
|
invocation.append('-format')
|
|
if args.style:
|
|
invocation.append('-style=' + args.style)
|
|
invocation.append(tmpdir)
|
|
subprocess.call(invocation)
|
|
|
|
|
|
def run_tidy(args, tmpdir, build_path, queue, lock, failed_files):
|
|
"""Takes filenames out of queue and runs clang-tidy on them."""
|
|
while True:
|
|
name = queue.get()
|
|
invocation = get_tidy_invocation(name, args.clang_tidy_binary, args.checks,
|
|
tmpdir, build_path, args.header_filter,
|
|
args.allow_enabling_alpha_checkers,
|
|
args.extra_arg, args.extra_arg_before,
|
|
args.quiet, args.config)
|
|
|
|
proc = subprocess.Popen(invocation, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
|
|
output, err = proc.communicate()
|
|
if proc.returncode != 0:
|
|
failed_files.append(name)
|
|
with lock:
|
|
sys.stdout.write(' '.join(invocation) + '\n' + output.decode('utf-8'))
|
|
if len(err) > 0:
|
|
sys.stdout.flush()
|
|
sys.stderr.write(err.decode('utf-8'))
|
|
queue.task_done()
|
|
|
|
|
|
def main():
|
|
parser = argparse.ArgumentParser(description='Runs clang-tidy over all files '
|
|
'in a compilation database. Requires '
|
|
'clang-tidy and clang-apply-replacements in '
|
|
'$PATH.')
|
|
parser.add_argument('-allow-enabling-alpha-checkers',
|
|
action='store_true', help='allow alpha checkers from '
|
|
'clang-analyzer.')
|
|
parser.add_argument('-clang-tidy-binary', metavar='PATH',
|
|
default='clang-tidy',
|
|
help='path to clang-tidy binary')
|
|
parser.add_argument('-clang-apply-replacements-binary', metavar='PATH',
|
|
default='clang-apply-replacements',
|
|
help='path to clang-apply-replacements binary')
|
|
parser.add_argument('-checks', default=None,
|
|
help='checks filter, when not specified, use clang-tidy '
|
|
'default')
|
|
parser.add_argument('-config', default=None,
|
|
help='Specifies a configuration in YAML/JSON format: '
|
|
' -config="{Checks: \'*\', '
|
|
' CheckOptions: [{key: x, '
|
|
' value: y}]}" '
|
|
'When the value is empty, clang-tidy will '
|
|
'attempt to find a file named .clang-tidy for '
|
|
'each source file in its parent directories.')
|
|
parser.add_argument('-header-filter', default=None,
|
|
help='regular expression matching the names of the '
|
|
'headers to output diagnostics from. Diagnostics from '
|
|
'the main file of each translation unit are always '
|
|
'displayed.')
|
|
if yaml:
|
|
parser.add_argument('-export-fixes', metavar='filename', dest='export_fixes',
|
|
help='Create a yaml file to store suggested fixes in, '
|
|
'which can be applied with clang-apply-replacements.')
|
|
parser.add_argument('-j', type=int, default=0,
|
|
help='number of tidy instances to be run in parallel.')
|
|
parser.add_argument('files', nargs='*', default=['.*'],
|
|
help='files to be processed (regex on path)')
|
|
parser.add_argument('-fix', action='store_true', help='apply fix-its')
|
|
parser.add_argument('-format', action='store_true', help='Reformat code '
|
|
'after applying fixes')
|
|
parser.add_argument('-style', default='file', help='The style of reformat '
|
|
'code after applying fixes')
|
|
parser.add_argument('-p', dest='build_path',
|
|
help='Path used to read a compile command database.')
|
|
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',
|
|
help='Run clang-tidy in quiet mode')
|
|
args = parser.parse_args()
|
|
|
|
db_path = 'compile_commands.json'
|
|
|
|
if args.build_path is not None:
|
|
build_path = args.build_path
|
|
else:
|
|
# Find our database
|
|
build_path = find_compilation_database(db_path)
|
|
|
|
try:
|
|
invocation = [args.clang_tidy_binary, '-list-checks']
|
|
if args.allow_enabling_alpha_checkers:
|
|
invocation.append('-allow-enabling-analyzer-alpha-checkers')
|
|
invocation.append('-p=' + build_path)
|
|
if args.checks:
|
|
invocation.append('-checks=' + args.checks)
|
|
invocation.append('-')
|
|
if args.quiet:
|
|
# Even with -quiet we still want to check if we can call clang-tidy.
|
|
with open(os.devnull, 'w') as dev_null:
|
|
subprocess.check_call(invocation, stdout=dev_null)
|
|
else:
|
|
subprocess.check_call(invocation)
|
|
except:
|
|
print("Unable to run clang-tidy.", file=sys.stderr)
|
|
sys.exit(1)
|
|
|
|
# Load the database and extract all files.
|
|
database = json.load(open(os.path.join(build_path, db_path)))
|
|
files = [make_absolute(entry['file'], entry['directory'])
|
|
for entry in database]
|
|
|
|
max_task = args.j
|
|
if max_task == 0:
|
|
max_task = multiprocessing.cpu_count()
|
|
|
|
tmpdir = None
|
|
if args.fix or (yaml and args.export_fixes):
|
|
check_clang_apply_replacements_binary(args)
|
|
tmpdir = tempfile.mkdtemp()
|
|
|
|
# Build up a big regexy filter from all command line arguments.
|
|
file_name_re = re.compile('|'.join(args.files))
|
|
|
|
return_code = 0
|
|
try:
|
|
# Spin up a bunch of tidy-launching threads.
|
|
task_queue = queue.Queue(max_task)
|
|
# List of files with a non-zero return code.
|
|
failed_files = []
|
|
lock = threading.Lock()
|
|
for _ in range(max_task):
|
|
t = threading.Thread(target=run_tidy,
|
|
args=(args, tmpdir, build_path, task_queue, lock, failed_files))
|
|
t.daemon = True
|
|
t.start()
|
|
|
|
# Fill the queue with files.
|
|
for name in files:
|
|
if file_name_re.search(name):
|
|
task_queue.put(name)
|
|
|
|
# Wait for all threads to be done.
|
|
task_queue.join()
|
|
if len(failed_files):
|
|
return_code = 1
|
|
|
|
except KeyboardInterrupt:
|
|
# This is a sad hack. Unfortunately subprocess goes
|
|
# bonkers with ctrl-c and we start forking merrily.
|
|
print('\nCtrl-C detected, goodbye.')
|
|
if tmpdir:
|
|
shutil.rmtree(tmpdir)
|
|
os.kill(0, 9)
|
|
|
|
if yaml and args.export_fixes:
|
|
print('Writing fixes to ' + args.export_fixes + ' ...')
|
|
try:
|
|
merge_replacement_files(tmpdir, args.export_fixes)
|
|
except:
|
|
print('Error exporting fixes.\n', file=sys.stderr)
|
|
traceback.print_exc()
|
|
return_code=1
|
|
|
|
if args.fix:
|
|
print('Applying fixes ...')
|
|
try:
|
|
apply_fixes(args, tmpdir)
|
|
except:
|
|
print('Error applying fixes.\n', file=sys.stderr)
|
|
traceback.print_exc()
|
|
return_code = 1
|
|
|
|
if tmpdir:
|
|
shutil.rmtree(tmpdir)
|
|
sys.exit(return_code)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|