mirror of https://github.com/grpc/grpc.git
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#!/usr/bin/env python2.7 |
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# Copyright 2016, Google Inc. |
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# All rights reserved. |
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# |
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# Redistribution and use in source and binary forms, with or without |
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# modification, are permitted provided that the following conditions are |
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# met: |
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# |
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# * Redistributions of source code must retain the above copyright |
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# notice, this list of conditions and the following disclaimer. |
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# * Redistributions in binary form must reproduce the above |
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# copyright notice, this list of conditions and the following disclaimer |
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# in the documentation and/or other materials provided with the |
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# distribution. |
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# * Neither the name of Google Inc. nor the names of its |
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# contributors may be used to endorse or promote products derived from |
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# this software without specific prior written permission. |
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# |
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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import argparse |
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import os |
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import re |
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import sys |
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import subprocess |
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def build_valid_guard(fpath): |
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prefix = 'GRPC_' if not fpath.startswith('include/') else '' |
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return prefix + '_'.join(fpath.replace('++', 'XX').replace('.', '_').upper().split('/')[1:]) |
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def load(fpath): |
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with open(fpath, 'r') as f: |
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return f.read() |
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def save(fpath, contents): |
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with open(fpath, 'w') as f: |
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f.write(contents) |
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class GuardValidator(object): |
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def __init__(self): |
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self.ifndef_re = re.compile(r'#ifndef ([A-Z][A-Z_1-9]*)') |
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self.define_re = re.compile(r'#define ([A-Z][A-Z_1-9]*)') |
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self.endif_c_re = re.compile(r'#endif /\* ([A-Z][A-Z_1-9]*) \*/') |
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self.endif_cpp_re = re.compile(r'#endif // ([A-Z][A-Z_1-9]*)') |
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self.failed = False |
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def fail(self, fpath, regexp, fcontents, match_txt, correct, fix): |
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cpp_header = 'grpc++' in fpath |
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self.failed = True |
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invalid_guards_msg_template = ( |
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'{0}: Missing preprocessor guards (RE {1}). ' |
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'Please wrap your code around the following guards:\n' |
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'#ifndef {2}\n' |
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'#define {2}\n' |
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'...\n' |
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'... epic code ...\n' |
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'...\n') + ('#endif // {2}' if cpp_header else '#endif /* {2} */') |
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if not match_txt: |
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print invalid_guards_msg_template.format(fpath, regexp.pattern, |
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build_valid_guard(fpath)) |
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return fcontents |
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print ('{}: Wrong preprocessor guards (RE {}):' |
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'\n\tFound {}, expected {}').format( |
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fpath, regexp.pattern, match_txt, correct) |
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if fix: |
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print 'Fixing {}...\n'.format(fpath) |
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fixed_fcontents = re.sub(match_txt, correct, fcontents) |
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if fixed_fcontents: |
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self.failed = False |
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return fixed_fcontents |
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else: |
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print |
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return fcontents |
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def check(self, fpath, fix): |
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cpp_header = 'grpc++' in fpath |
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valid_guard = build_valid_guard(fpath) |
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fcontents = load(fpath) |
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match = self.ifndef_re.search(fcontents) |
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if match.lastindex != 1: |
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# No ifndef. Request manual addition with hints |
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self.fail(fpath, match.re, match.string, '', '', False) |
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# Does the guard end with a '_H'? |
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running_guard = match.group(1) |
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if not running_guard.endswith('_H'): |
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fcontents = self.fail(fpath, match.re, match.string, match.group(1), |
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valid_guard, fix) |
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save(fpath, fcontents) |
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# Is it the expected one based on the file path? |
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if running_guard != valid_guard: |
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fcontents = self.fail(fpath, match.re, match.string, match.group(1), |
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valid_guard, fix) |
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save(fpath, fcontents) |
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# Is there a #define? Is it the same as the #ifndef one? |
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match = self.define_re.search(fcontents) |
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if match.lastindex != 1: |
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# No define. Request manual addition with hints |
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self.fail(fpath, match.re, match.string, '', '', False) |
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# Is the #define guard the same as the #ifndef guard? |
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if match.group(1) != running_guard: |
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fcontents = self.fail(fpath, match.re, match.string, match.group(1), |
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valid_guard, fix) |
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save(fpath, fcontents) |
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# Is there a properly commented #endif? |
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endif_re = self.endif_cpp_re if cpp_header else self.endif_c_re |
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matches = endif_re.findall(fcontents) |
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if not matches: |
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# No endif. Check if we have the last line as just '#endif' and if so |
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# replace it with a properly commented one. |
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flines = fcontents.splitlines() |
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if flines[-1] == '#endif': |
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flines[-1] = ('#endif' + |
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(' // {}\n'.format(valid_guard) if cpp_header |
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else ' /* {} */\n'.format(valid_guard))) |
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fcontents = '\n'.join(flines) |
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save(fpath, fcontents) |
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else: |
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# something else is wrong, bail out |
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self.fail(fpath, endif_re, match.string, '', '', False) |
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elif matches[-1] != running_guard: |
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# Is the #endif guard the same as the #ifndef and #define guards? |
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fcontents = self.fail(fpath, endif_re, fcontents, matches[-1], |
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valid_guard, fix) |
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save(fpath, fcontents) |
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return not self.failed # Did the check succeed? (ie, not failed) |
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# find our home |
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ROOT = os.path.abspath( |
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os.path.join(os.path.dirname(sys.argv[0]), '../..')) |
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os.chdir(ROOT) |
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# parse command line |
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argp = argparse.ArgumentParser(description='include guard checker') |
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argp.add_argument('-f', '--fix', |
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default=False, |
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action='store_true'); |
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argp.add_argument('--precommit', |
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default=False, |
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action='store_true') |
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args = argp.parse_args() |
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KNOWN_BAD = set([ |
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'src/core/proto/grpc/lb/v0/load_balancer.pb.h', |
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]) |
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grep_filter = r"grep -E '^(include|src/core)/.*\.h$'" |
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if args.precommit: |
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git_command = 'git diff --name-only HEAD' |
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else: |
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git_command = 'git ls-tree -r --name-only -r HEAD' |
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FILE_LIST_COMMAND = ' | '.join((git_command, grep_filter)) |
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# scan files |
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ok = True |
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filename_list = [] |
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try: |
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filename_list = subprocess.check_output(FILE_LIST_COMMAND, |
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shell=True).splitlines() |
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except subprocess.CalledProcessError: |
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sys.exit(0) |
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validator = GuardValidator() |
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for filename in filename_list: |
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if filename in KNOWN_BAD: continue |
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ok = validator.check(filename, args.fix) |
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sys.exit(0 if ok else 1) |
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