#!/usr/bin/env python3 # Copyright 2016 gRPC authors. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import argparse import os import os.path import re import sys import subprocess def build_valid_guard(fpath): prefix = 'GRPC_' if not fpath.startswith('include/') else '' return prefix + '_'.join( fpath.replace('++', 'XX').replace('.', '_').upper().split('/')[1:]) def load(fpath): with open(fpath, 'r') as f: return f.read() def save(fpath, contents): with open(fpath, 'w') as f: f.write(contents) class GuardValidator(object): def __init__(self): self.ifndef_re = re.compile(r'#ifndef ([A-Z][A-Z_1-9]*)') self.define_re = re.compile(r'#define ([A-Z][A-Z_1-9]*)') self.endif_c_core_re = re.compile( r'#endif /\* (?: *\\\n *)?([A-Z][A-Z_1-9]*) (?:\\\n *)?\*/$') self.endif_re = re.compile(r'#endif // ([A-Z][A-Z_1-9]*)') self.failed = False def fail(self, fpath, regexp, fcontents, match_txt, correct, fix): c_core_header = 'include' in fpath and not ('grpc++' in fpath or 'grpcpp' in fpath) self.failed = True invalid_guards_msg_template = ( '{0}: Missing preprocessor guards (RE {1}). ' 'Please wrap your code around the following guards:\n' '#ifndef {2}\n' '#define {2}\n' '...\n' '... epic code ...\n' '...\n') + ('#endif /* {2} */' if c_core_header else '#endif // {2}') if not match_txt: print( invalid_guards_msg_template.format(fpath, regexp.pattern, build_valid_guard(fpath))) return fcontents print(('{}: Wrong preprocessor guards (RE {}):' '\n\tFound {}, expected {}').format(fpath, regexp.pattern, match_txt, correct)) if fix: print('Fixing {}...\n'.format(fpath)) fixed_fcontents = re.sub(match_txt, correct, fcontents) if fixed_fcontents: self.failed = False return fixed_fcontents else: print() return fcontents def check(self, fpath, fix): c_core_header = 'include' in fpath and not ('grpc++' in fpath or 'grpcpp' in fpath) valid_guard = build_valid_guard(fpath) fcontents = load(fpath) match = self.ifndef_re.search(fcontents) if not match: print('something drastically wrong with: %s' % fpath) return False # failed if match.lastindex is None: # No ifndef. Request manual addition with hints self.fail(fpath, match.re, match.string, '', '', False) return False # failed # Does the guard end with a '_H'? running_guard = match.group(1) if not running_guard.endswith('_H'): fcontents = self.fail(fpath, match.re, match.string, match.group(1), valid_guard, fix) if fix: save(fpath, fcontents) # Is it the expected one based on the file path? if running_guard != valid_guard: fcontents = self.fail(fpath, match.re, match.string, match.group(1), valid_guard, fix) if fix: save(fpath, fcontents) # Is there a #define? Is it the same as the #ifndef one? match = self.define_re.search(fcontents) if match.lastindex is None: # No define. Request manual addition with hints self.fail(fpath, match.re, match.string, '', '', False) return False # failed # Is the #define guard the same as the #ifndef guard? if match.group(1) != running_guard: fcontents = self.fail(fpath, match.re, match.string, match.group(1), valid_guard, fix) if fix: save(fpath, fcontents) # Is there a properly commented #endif? flines = fcontents.rstrip().splitlines() match = self.endif_c_core_re.search('\n'.join(flines[-3:])) if not match and not c_core_header: match = self.endif_re.search('\n'.join(flines[-3:])) if not match: # No endif. Check if we have the last line as just '#endif' and if so # replace it with a properly commented one. if flines[-1] == '#endif': flines[-1] = ( '#endif' + (' /* {} */\n'.format(valid_guard) if c_core_header else ' // {}\n'.format(valid_guard))) if fix: fcontents = '\n'.join(flines) save(fpath, fcontents) else: # something else is wrong, bail out self.fail( fpath, self.endif_c_core_re if c_core_header else self.endif_re, flines[-1], '', '', False) elif match.group(1) != running_guard: # Is the #endif guard the same as the #ifndef and #define guards? fcontents = self.fail(fpath, endif_re, fcontents, match.group(1), valid_guard, fix) if fix: save(fpath, fcontents) return not self.failed # Did the check succeed? (ie, not failed) # find our home ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..')) os.chdir(ROOT) # parse command line argp = argparse.ArgumentParser(description='include guard checker') argp.add_argument('-f', '--fix', default=False, action='store_true') argp.add_argument('--precommit', default=False, action='store_true') args = argp.parse_args() grep_filter = r"grep -E '^(include|src/core)/.*\.h$'" if args.precommit: git_command = 'git diff --name-only HEAD' else: git_command = 'git ls-tree -r --name-only -r HEAD' FILE_LIST_COMMAND = ' | '.join((git_command, grep_filter)) # scan files ok = True filename_list = [] try: filename_list = subprocess.check_output(FILE_LIST_COMMAND, shell=True).decode().splitlines() # Filter out non-existent files (ie, file removed or renamed) filename_list = (f for f in filename_list if os.path.isfile(f)) except subprocess.CalledProcessError: sys.exit(0) validator = GuardValidator() for filename in filename_list: # Skip check for upb generated code. if (filename.endswith('.upb.h') or filename.endswith('.upb.c') or filename.endswith('.upbdefs.h') or filename.endswith('.upbdefs.c')): continue ok = ok and validator.check(filename, args.fix) sys.exit(0 if ok else 1)