px4-firmware/Tools/run-clang-tidy.py

231 lines
7.7 KiB
Python
Executable File

#!/usr/bin/env python
#
#===- run-clang-tidy.py - Parallel clang-tidy runner ---------*- python -*--===#
#
# The LLVM Compiler Infrastructure
#
# This file is distributed under the University of Illinois Open Source
# License. See LICENSE.TXT for details.
#
#===------------------------------------------------------------------------===#
# 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 json
import multiprocessing
import os
try:
import queue as Queue
except ImportError:
import Queue
import re
import shutil
import subprocess
import sys
import tempfile
import threading
tidy_failures = 0
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 get_tidy_invocation(f, clang_tidy_binary, checks, tmpdir, build_path,
header_filter, extra_arg, extra_arg_before):
"""Gets a command line for clang-tidy."""
start = [clang_tidy_binary]
if header_filter is not None:
start.append('-header-filter=' + header_filter)
else:
# Show warnings in all in-project headers by default.
start.append('-header-filter=^' + build_path + '/.*')
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)
start.append(f)
return start
def apply_fixes(args, tmpdir):
"""Calls clang-apply-fixes on a given directory. Deletes the dir when done."""
invocation = [args.clang_apply_replacements_binary]
if args.format:
invocation.append('-format')
invocation.append(tmpdir)
subprocess.call(invocation)
shutil.rmtree(tmpdir)
def run_tidy(args, tmpdir, build_path, queue):
"""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.extra_arg, args.extra_arg_before)
try:
subprocess.check_call(invocation, stdin=None, stdout=open(os.devnull, 'wb'), stderr=subprocess.STDOUT)
except subprocess.CalledProcessError as e:
sys.stdout.write(' '.join(invocation) + '\n')
subprocess.call(invocation)
global tidy_failures
tidy_failures = tidy_failures + 1
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('-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('-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.')
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('-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.')
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']
invocation.append('-p=' + build_path)
if args.checks:
invocation.append('-checks=' + args.checks)
invocation.append('-')
print(subprocess.check_output(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 = [entry['file'] for entry in database]
max_task = args.j
if max_task == 0:
max_task = multiprocessing.cpu_count()
tmpdir = None
if args.fix:
tmpdir = tempfile.mkdtemp()
# Build up a big regexy filter from all command line arguments.
file_name_re = re.compile('(' + ')|('.join(args.files) + ')')
try:
# Spin up a bunch of tidy-launching threads.
queue = Queue.Queue(max_task)
for _ in range(max_task):
t = threading.Thread(target=run_tidy,
args=(args, tmpdir, build_path, queue))
t.daemon = True
t.start()
# Fill the queue with files.
for name in files:
if file_name_re.search(name):
queue.put(name)
# Wait for all threads to be done.
queue.join()
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 args.fix:
shutil.rmtree(tmpdir)
os.kill(0, 9)
if args.fix:
print('Applying fixes ...')
apply_fixes(args, tmpdir)
global tidy_failures
if tidy_failures > 0:
print("clang-tidy errors: ", tidy_failures, file=sys.stderr)
sys.exit(1)
if __name__ == '__main__':
main()