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230 lines
7.7 KiB
230 lines
7.7 KiB
#!/usr/bin/env python |
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# |
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#===- run-clang-tidy.py - Parallel clang-tidy runner ---------*- python -*--===# |
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# |
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# The LLVM Compiler Infrastructure |
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# |
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# This file is distributed under the University of Illinois Open Source |
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# License. See LICENSE.TXT for details. |
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# |
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#===------------------------------------------------------------------------===# |
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# FIXME: Integrate with clang-tidy-diff.py |
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""" |
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Parallel clang-tidy runner |
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========================== |
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Runs clang-tidy over all files in a compilation database. Requires clang-tidy |
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and clang-apply-replacements in $PATH. |
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Example invocations. |
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- Run clang-tidy on all files in the current working directory with a default |
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set of checks and show warnings in the cpp files and all project headers. |
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run-clang-tidy.py $PWD |
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- Fix all header guards. |
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run-clang-tidy.py -fix -checks=-*,llvm-header-guard |
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- Fix all header guards included from clang-tidy and header guards |
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for clang-tidy headers. |
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run-clang-tidy.py -fix -checks=-*,llvm-header-guard extra/clang-tidy \ |
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-header-filter=extra/clang-tidy |
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Compilation database setup: |
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http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html |
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""" |
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from __future__ import print_function |
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import argparse |
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import json |
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import multiprocessing |
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import os |
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try: |
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import queue as Queue |
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except ImportError: |
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import Queue |
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import re |
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import shutil |
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import subprocess |
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import sys |
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import tempfile |
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import threading |
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tidy_failures = 0 |
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def find_compilation_database(path): |
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"""Adjusts the directory until a compilation database is found.""" |
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result = './' |
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while not os.path.isfile(os.path.join(result, path)): |
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if os.path.realpath(result) == '/': |
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print('Error: could not find compilation database.') |
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sys.exit(1) |
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result += '../' |
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return os.path.realpath(result) |
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def get_tidy_invocation(f, clang_tidy_binary, checks, tmpdir, build_path, |
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header_filter, extra_arg, extra_arg_before): |
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"""Gets a command line for clang-tidy.""" |
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start = [clang_tidy_binary] |
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if header_filter is not None: |
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start.append('-header-filter=' + header_filter) |
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else: |
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# Show warnings in all in-project headers by default. |
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start.append('-header-filter=^' + build_path + '/.*') |
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if checks: |
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start.append('-checks=' + checks) |
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if tmpdir is not None: |
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start.append('-export-fixes') |
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# Get a temporary file. We immediately close the handle so clang-tidy can |
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# overwrite it. |
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(handle, name) = tempfile.mkstemp(suffix='.yaml', dir=tmpdir) |
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os.close(handle) |
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start.append(name) |
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for arg in extra_arg: |
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start.append('-extra-arg=%s' % arg) |
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for arg in extra_arg_before: |
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start.append('-extra-arg-before=%s' % arg) |
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start.append('-p=' + build_path) |
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start.append(f) |
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return start |
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def apply_fixes(args, tmpdir): |
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"""Calls clang-apply-fixes on a given directory. Deletes the dir when done.""" |
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invocation = [args.clang_apply_replacements_binary] |
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if args.format: |
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invocation.append('-format') |
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invocation.append(tmpdir) |
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subprocess.call(invocation) |
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shutil.rmtree(tmpdir) |
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def run_tidy(args, tmpdir, build_path, queue): |
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"""Takes filenames out of queue and runs clang-tidy on them.""" |
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while True: |
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name = queue.get() |
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invocation = get_tidy_invocation(name, args.clang_tidy_binary, args.checks, |
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tmpdir, build_path, args.header_filter, |
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args.extra_arg, args.extra_arg_before) |
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try: |
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subprocess.check_call(invocation, stdin=None, stdout=open(os.devnull, 'wb'), stderr=subprocess.STDOUT) |
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except subprocess.CalledProcessError as e: |
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sys.stdout.write(' '.join(invocation) + '\n') |
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subprocess.call(invocation) |
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global tidy_failures |
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tidy_failures = tidy_failures + 1 |
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queue.task_done() |
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def main(): |
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parser = argparse.ArgumentParser(description='Runs clang-tidy over all files ' |
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'in a compilation database. Requires ' |
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'clang-tidy and clang-apply-replacements in ' |
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'$PATH.') |
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parser.add_argument('-clang-tidy-binary', metavar='PATH', |
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default='clang-tidy', |
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help='path to clang-tidy binary') |
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parser.add_argument('-clang-apply-replacements-binary', metavar='PATH', |
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default='clang-apply-replacements', |
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help='path to clang-apply-replacements binary') |
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parser.add_argument('-checks', default=None, |
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help='checks filter, when not specified, use clang-tidy ' |
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'default') |
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parser.add_argument('-header-filter', default=None, |
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help='regular expression matching the names of the ' |
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'headers to output diagnostics from. Diagnostics from ' |
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'the main file of each translation unit are always ' |
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'displayed.') |
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parser.add_argument('-j', type=int, default=0, |
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help='number of tidy instances to be run in parallel.') |
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parser.add_argument('files', nargs='*', default=['.*'], |
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help='files to be processed (regex on path)') |
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parser.add_argument('-fix', action='store_true', help='apply fix-its') |
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parser.add_argument('-format', action='store_true', help='Reformat code ' |
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'after applying fixes') |
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parser.add_argument('-p', dest='build_path', |
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help='Path used to read a compile command database.') |
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parser.add_argument('-extra-arg', dest='extra_arg', |
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action='append', default=[], |
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help='Additional argument to append to the compiler ' |
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'command line.') |
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parser.add_argument('-extra-arg-before', dest='extra_arg_before', |
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action='append', default=[], |
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help='Additional argument to prepend to the compiler ' |
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'command line.') |
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args = parser.parse_args() |
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db_path = 'compile_commands.json' |
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if args.build_path is not None: |
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build_path = args.build_path |
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else: |
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# Find our database |
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build_path = find_compilation_database(db_path) |
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try: |
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invocation = [args.clang_tidy_binary, '-list-checks'] |
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invocation.append('-p=' + build_path) |
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if args.checks: |
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invocation.append('-checks=' + args.checks) |
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invocation.append('-') |
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print(subprocess.check_output(invocation)) |
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except: |
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print("Unable to run clang-tidy.", file=sys.stderr) |
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sys.exit(1) |
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# Load the database and extract all files. |
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database = json.load(open(os.path.join(build_path, db_path))) |
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files = [entry['file'] for entry in database] |
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max_task = args.j |
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if max_task == 0: |
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max_task = multiprocessing.cpu_count() |
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tmpdir = None |
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if args.fix: |
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tmpdir = tempfile.mkdtemp() |
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# Build up a big regexy filter from all command line arguments. |
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file_name_re = re.compile('(' + ')|('.join(args.files) + ')') |
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try: |
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# Spin up a bunch of tidy-launching threads. |
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queue = Queue.Queue(max_task) |
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for _ in range(max_task): |
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t = threading.Thread(target=run_tidy, |
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args=(args, tmpdir, build_path, queue)) |
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t.daemon = True |
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t.start() |
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# Fill the queue with files. |
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for name in files: |
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if file_name_re.search(name): |
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queue.put(name) |
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# Wait for all threads to be done. |
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queue.join() |
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except KeyboardInterrupt: |
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# This is a sad hack. Unfortunately subprocess goes |
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# bonkers with ctrl-c and we start forking merrily. |
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print('\nCtrl-C detected, goodbye.') |
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if args.fix: |
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shutil.rmtree(tmpdir) |
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os.kill(0, 9) |
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if args.fix: |
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print('Applying fixes ...') |
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apply_fixes(args, tmpdir) |
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global tidy_failures |
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if tidy_failures > 0: |
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print("clang-tidy errors: ", tidy_failures, file=sys.stderr) |
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sys.exit(1) |
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if __name__ == '__main__': |
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main()
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