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#!/usr/bin/env python3
#
# Copyright (c) 2018-2022 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""
Check include guards.
"""
import re
import sys
from subprocess import check_output
from typing import List
HEADER_ID_PREFIX = 'BITCOIN_'
HEADER_ID_SUFFIX = '_H'
EXCLUDE_FILES_WITH_PREFIX = ['src/crypto/ctaes',
'src/leveldb',
'src/crc32c',
'src/secp256k1',
'src/minisketch',
'src/univalue',
'src/tinyformat.h',
'src/bench/nanobench.h',
'src/test/fuzz/FuzzedDataProvider.h']
def _get_header_file_lst() -> List[str]:
""" Helper function to get a list of header filepaths to be
checked for include guards.
"""
git_cmd_lst = ['git', 'ls-files', '--', '*.h']
header_file_lst = check_output(
git_cmd_lst).decode('utf-8').splitlines()
header_file_lst = [hf for hf in header_file_lst
if not any(ef in hf for ef
in EXCLUDE_FILES_WITH_PREFIX)]
return header_file_lst
def _get_header_id(header_file: str) -> str:
""" Helper function to get the header id from a header file
string.
eg: 'src/wallet/walletdb.h' -> 'BITCOIN_WALLET_WALLETDB_H'
Args:
header_file: Filepath to header file.
Returns:
The header id.
"""
header_id_base = header_file.split('/')[1:]
header_id_base = '_'.join(header_id_base)
header_id_base = header_id_base.replace('.h', '').replace('-', '_')
header_id_base = header_id_base.upper()
header_id = f'{HEADER_ID_PREFIX}{header_id_base}{HEADER_ID_SUFFIX}'
return header_id
def main():
exit_code = 0
header_file_lst = _get_header_file_lst()
for header_file in header_file_lst:
header_id = _get_header_id(header_file)
regex_pattern = f'^#(ifndef|define|endif //) {header_id}'
with open(header_file, 'r', encoding='utf-8') as f:
header_file_contents = f.readlines()
count = 0
for header_file_contents_string in header_file_contents:
include_guard_lst = re.findall(
regex_pattern, header_file_contents_string)
count += len(include_guard_lst)
if count != 3:
print(f'{header_file} seems to be missing the expected '
'include guard:')
print(f' #ifndef {header_id}')
print(f' #define {header_id}')
print(' ...')
print(f' #endif // {header_id}\n')
exit_code = 1
sys.exit(exit_code)
if __name__ == '__main__':
main()
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