54 lines
1.7 KiB
Python
54 lines
1.7 KiB
Python
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#!/usr/bin/env python3
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# Deletes the PCH arguments from a compilation database, to workaround nixpkgs
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# stdenv having a cc-wrapper that is impossible to use for anything except cc
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# itself, for example, clang-tidy.
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import json
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import shlex
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def process_compdb(compdb: list[dict]) -> list[dict]:
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def munch_command(args: list[str]) -> list[str]:
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out = []
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eat_next = False
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for i, arg in enumerate(args):
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if arg == '-fpch-preprocess':
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# as used with gcc
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continue
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elif arg == '-include-pch' or (arg == '-include' and args[i + 1] == 'precompiled-headers.hh'):
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# -include-pch some-pch (clang), or -include some-pch (gcc)
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eat_next = True
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continue
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if not eat_next:
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out.append(arg)
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eat_next = False
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return out
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def chomp(item: dict) -> dict:
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item = item.copy()
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item['command'] = shlex.join(munch_command(shlex.split(item['command'])))
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return item
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return [chomp(x) for x in compdb if not x['file'].endswith('precompiled-headers.hh')]
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def main():
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import argparse
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ap = argparse.ArgumentParser(
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description='Delete pch arguments from compilation database')
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ap.add_argument('input',
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type=argparse.FileType('r'),
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help='Input json file')
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ap.add_argument('output',
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type=argparse.FileType('w'),
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help='Output json file')
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args = ap.parse_args()
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input_json = json.load(args.input)
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json.dump(process_compdb(input_json), args.output, indent=2)
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if __name__ == '__main__':
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main()
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