clang-tidy: fix the fact that we are not linting headers properly

This, however, took fixing a pile of lints that we predictably missed
because of this bug.

Change-Id: I92c36feb4a03f62bc594c2051c7bd7418d13fb08
This commit is contained in:
jade 2024-08-22 22:42:58 -07:00 committed by Rebecca Turner
parent 4d89844207
commit e6f2af06e6
Signed by: rbt
SSH key fingerprint: SHA256:SiNaEWabvotTldoNb5jIKqjJ3RnpS4aRXA4KLAdW5vs
3 changed files with 97 additions and 25 deletions

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@ -0,0 +1,89 @@
#!/usr/bin/env python3
"""
Runs run-clang-tidy. A bit meta. Maybe it will replace run-clang-tidy one day
because the run-clang-tidy UX is so questionable.
"""
# I hereby dedicate this script to fuck you meson.
# I cannot simply write my code to invoke a subprocess in a meson file because
# Meson corrupts backslashes in command line args to subprocesses.
# This is allegedly for "Windows support", but last time I checked Windows
# neither needs nor wants you to corrupt its command lines.
# https://github.com/mesonbuild/meson/issues/1564
import multiprocessing
import subprocess
import os
import sys
from pathlib import Path
def default_concurrency():
return min(multiprocessing.cpu_count(),
int(os.environ.get("NIX_BUILD_CORES", "16")))
def go(exe: str, plugin_path: Path, compile_commands_json_dir: Path, jobs: int,
paths: list[Path], werror: bool, fix: bool):
args = [
# XXX: This explicitly invokes it with python because of a nixpkgs bug
# where clang-unwrapped does not patch interpreters in run-clang-tidy.
# However, making clang-unwrapped depend on python is also silly, so idk.
sys.executable,
exe,
'-quiet',
'-load',
plugin_path,
'-p',
compile_commands_json_dir,
'-j',
str(jobs),
'-header-filter',
r'src/[^/]+/.*\.hh'
]
if werror:
args += ['-warnings-as-errors', '*']
if fix:
args += ['-fix']
args += ['--']
args += paths
os.execvp(sys.executable, args)
def main():
import argparse
ap = argparse.ArgumentParser(description='Runs run-clang-tidy for you')
ap.add_argument('--jobs',
'-j',
type=int,
default=default_concurrency(),
help='Parallel linting jobs to run')
ap.add_argument('--plugin-path',
type=Path,
help='Path to the Lix clang-tidy plugin')
# FIXME: maybe we should integrate this so it just fixes the compdb for you and throws it in a tempdir?
ap.add_argument(
'--compdb-path',
type=Path,
help=
'Path to the directory containing the fixed-up compilation database from clean_compdb'
)
ap.add_argument('--werror',
action='store_true',
help='Warnings get turned into errors')
ap.add_argument('--fix',
action='store_true',
help='Apply fixes for warnings')
ap.add_argument('--run-clang-tidy-path',
default='run-clang-tidy',
help='Path to run-clang-tidy')
ap.add_argument('paths', nargs='*', help='Source paths to check')
args = ap.parse_args()
go(args.run_clang_tidy_path, args.plugin_path, args.compdb_path, args.jobs,
args.paths, args.werror, args.fix)
if __name__ == '__main__':
main()

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@ -13,8 +13,8 @@ def process_compdb(compdb: list[dict]) -> list[dict]:
out = []
eat_next = False
for i, arg in enumerate(args):
if arg == '-fpch-preprocess':
# as used with gcc
if arg in ['-fpch-preprocess', '-fpch-instantiate-templates']:
# -fpch-preprocess as used with gcc, -fpch-instantiate-templates as used by clang
continue
elif arg == '-include-pch' or (arg == '-include' and args[i + 1] == 'precompiled-headers.hh'):
# -include-pch some-pch (clang), or -include some-pch (gcc)

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@ -57,34 +57,18 @@ build_all_generated_headers = custom_target(
)
if lix_clang_tidy_so_found
default_concurrency = run_command(python, '-c', '''
import multiprocessing
import os
print(min(multiprocessing.cpu_count(), int(os.environ.get("NIX_BUILD_CORES", "16"))))
''', check : true).stdout()
run_clang_tidy_args = [
'-load',
lix_clang_tidy_so,
'-p',
# We have to workaround a run-clang-tidy bug too, so we must give the
# directory name rather than the actual compdb file.
# https://github.com/llvm/llvm-project/issues/101440
meson.current_build_dir(),
'-quiet',
'-j', default_concurrency,
meson.current_source_dir() / 'clang-tidy-runner.py',
'--run-clang-tidy-path', run_clang_tidy,
'--compdb-path', meson.current_build_dir(),
'--plugin-path', lix_clang_tidy_so,
]
run_target(
'clang-tidy',
command : [
# XXX: This explicitly invokes it with python because of a nixpkgs bug
# where clang-unwrapped does not patch interpreters in run-clang-tidy.
# However, making clang-unwrapped depend on python is also silly, so idk.
python,
run_clang_tidy,
run_clang_tidy_args,
'-warnings-as-errors',
'*',
'--werror',
],
depends : [
build_all_generated_headers,
@ -94,9 +78,8 @@ print(min(multiprocessing.cpu_count(), int(os.environ.get("NIX_BUILD_CORES", "16
'clang-tidy-fix',
command : [
python,
run_clang_tidy,
run_clang_tidy_args,
'-fix',
'--fix',
],
depends : [
build_all_generated_headers,