lix/meson/clang-tidy/clean_compdb.py
jade e6f2af06e6
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
2024-08-28 09:52:08 -07:00

61 lines
1.9 KiB
Python
Executable file

#!/usr/bin/env python3
# Deletes the PCH arguments from a compilation database, to workaround nixpkgs
# stdenv having a cc-wrapper that is impossible to use for anything except cc
# itself, for example, clang-tidy.
import json
import shlex
def process_compdb(compdb: list[dict]) -> list[dict]:
def munch_command(args: list[str]) -> list[str]:
out = []
eat_next = False
for i, arg in enumerate(args):
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)
eat_next = True
continue
if not eat_next:
out.append(arg)
eat_next = False
return out
def chomp(item: dict) -> dict:
item = item.copy()
item['command'] = shlex.join(munch_command(shlex.split(item['command'])))
return item
def cmdfilter(item: dict) -> bool:
file = item['file']
return (
not file.endswith('precompiled-headers.hh')
and not file.endswith('.rs')
)
return [chomp(x) for x in compdb if cmdfilter(x)]
def main():
import argparse
ap = argparse.ArgumentParser(
description='Delete pch arguments from compilation database')
ap.add_argument('input',
type=argparse.FileType('r'),
help='Input json file')
ap.add_argument('output',
type=argparse.FileType('w'),
help='Output json file')
args = ap.parse_args()
input_json = json.load(args.input)
json.dump(process_compdb(input_json), args.output, indent=2)
if __name__ == '__main__':
main()