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#!/usr/bin/env python
import libcxx.header_information
import os
import pathlib
import re
import typing
def IWYU_mapping(header: str) -> typing.Optional[typing.List[str]]:
ignore = [
"__debug_utils/.+",
"__fwd/get[.]h",
"__support/.+",
]
if any(re.match(pattern, header) for pattern in ignore):
return None
elif header == "__bits":
return ["bits"]
elif header in ("__bit_reference", "__fwd/bit_reference.h"):
return ["bitset", "vector"]
elif header == "__hash_table":
return ["unordered_map", "unordered_set"]
elif header == "__locale":
return ["locale"]
elif re.match("__locale_dir/.+", header):
return ["locale"]
elif re.match("__math/.+", header):
return ["cmath"]
elif header == "__node_handle":
return ["map", "set", "unordered_map", "unordered_set"]
elif header == "__split_buffer":
return ["deque", "vector"]
elif header == "__threading_support":
return ["atomic", "mutex", "semaphore", "thread"]
elif header == "__tree":
return ["map", "set"]
elif header == "__fwd/hash.h":
return ["functional"]
elif header == "__fwd/pair.h":
return ["utility"]
elif header == "__fwd/subrange.h":
return ["ranges"]
# Handle remaining forward declaration headers
elif re.match("__fwd/(.+)[.]h", header):
return [re.match("__fwd/(.+)[.]h", header).group(1)]
# Handle detail headers for things like <__algorithm/foo.h>
elif re.match("__(.+?)/.+", header):
return [re.match("__(.+?)/.+", header).group(1)]
else:
return None
def main():
mappings = [] # Pairs of (header, public_header)
for header in libcxx.header_information.all_headers:
public_headers = IWYU_mapping(header)
if public_headers is not None:
mappings.extend((header, public) for public in public_headers)
# Validate that we only have valid public header names -- otherwise the mapping above
# needs to be updated.
for header, public in mappings:
if public not in libcxx.header_information.public_headers:
raise RuntimeError(f"{header}: Header {public} is not a valid header")
with open(libcxx.header_information.include / "libcxx.imp", "w") as f:
f.write("[\n")
for header, public in sorted(mappings):
f.write(
f' {{ include: [ "<{header}>", "private", "<{public}>", "public" ] }},\n'
)
f.write("]\n")
if __name__ == "__main__":
main()
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