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Re: Transformation of contrib/check_GNU_style.sh to a python script
Hello.
I'm sending final (slightly updated) version of the script. I'm also adding Jakub,
because I remember he's got another regex patterns he's using for review process?
Would it be fine to just remove the old *.sh script, or is it preferred to have
them both living next to each other for some time?
Thanks,
Martin
#!/usr/bin/env python3
#
# Checks some of the GNU style formatting rules in a set of patches.
#
# This file is part of GCC.
#
# GCC is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 3, or (at your option) any later
# version.
#
# GCC is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3. If not see
# <http://www.gnu.org/licenses/>. */
#
# The script requires following python packages
# (can be installed via "pip 3 install"):
# unidiff
# termcolor
import sys
import re
import argparse
import unittest
from termcolor import colored
from unidiff import PatchSet
from itertools import *
ws_char = 'â??'
ts = 8
def error_string(s):
return colored(s, 'red', attrs = ['bold'])
class CheckError:
def __init__(self, filename, lineno, console_error, error_message,
column = -1):
self.filename = filename
self.lineno = lineno
self.console_error = console_error
self.error_message = error_message
self.column = column
def error_location(self):
return '%s:%d:%d:' % (self.filename, self.lineno,
self.column if self.column != -1 else -1)
class LineLengthCheck:
def __init__(self):
self.limit = 80
self.expanded_tab = ' ' * ts
def check(self, filename, lineno, line):
line_expanded = line.replace('\t', self.expanded_tab)
if len(line_expanded) > self.limit:
return CheckError(filename, lineno,
line_expanded[:self.limit]
+ error_string(line_expanded[self.limit:]),
'lines should not exceed 80 characters', self.limit)
return None
class SpacesCheck:
def __init__(self):
self.expanded_tab = ' ' * ts
def check(self, filename, lineno, line):
i = line.find(self.expanded_tab)
if i != -1:
return CheckError(filename, lineno,
line.replace(self.expanded_tab, error_string(ws_char * ts)),
'blocks of 8 spaces should be replaced with tabs', i)
class TrailingWhitespaceCheck:
def __init__(self):
self.re = re.compile('(\s+)$')
def check(self, filename, lineno, line):
m = self.re.search(line)
if m != None:
return CheckError(filename, lineno,
line[:m.start(1)] + error_string(ws_char * len(m.group(1)))
+ line[m.end(1):],
'trailing whitespace', m.start(1))
class SentenceSeparatorCheck:
def __init__(self):
self.re = re.compile('\w\.(\s|\s{3,})\w')
def check(self, filename, lineno, line):
m = self.re.search(line)
if m != None:
return CheckError(filename, lineno,
line[:m.start(1)] + error_string(ws_char * len(m.group(1)))
+ line[m.end(1):],
'dot, space, space, new sentence', m.start(1))
class SentenceEndOfCommentCheck:
def __init__(self):
self.re = re.compile('\w\.(\s{0,1}|\s{3,})\*/')
def check(self, filename, lineno, line):
m = self.re.search(line)
if m != None:
return CheckError(filename, lineno,
line[:m.start(1)] + error_string(ws_char * len(m.group(1)))
+ line[m.end(1):],
'dot, space, space, end of comment', m.start(1))
class SentenceDotEndCheck:
def __init__(self):
self.re = re.compile('\w(\s*\*/)')
def check(self, filename, lineno, line):
m = self.re.search(line)
if m != None:
return CheckError(filename, lineno,
line[:m.start(1)] + error_string(m.group(1)) + line[m.end(1):],
'dot, space, space, end of comment', m.start(1))
class FunctionParenthesisCheck:
# TODO: filter out GTY stuff
def __init__(self):
self.re = re.compile('\w(\s{2,})?(\()')
def check(self, filename, lineno, line):
if '#define' in line:
return None
m = self.re.search(line)
if m != None:
return CheckError(filename, lineno,
line[:m.start(2)] + error_string(m.group(2)) + line[m.end(2):],
'there should be exactly one space between function name ' \
'and parenthesis', m.start(2))
class SquareBracketCheck:
def __init__(self):
self.re = re.compile('\w\s+(\[)')
def check(self, filename, lineno, line):
m = self.re.search(line)
if m != None:
return CheckError(filename, lineno,
line[:m.start(1)] + error_string(m.group(1)) + line[m.end(1):],
'there should be no space before a left square bracket',
m.start(1))
class ClosingParenthesisCheck:
def __init__(self):
self.re = re.compile('\S\s+(\))')
def check(self, filename, lineno, line):
m = self.re.search(line)
if m != None:
return CheckError(filename, lineno,
line[:m.start(1)] + error_string(m.group(1)) + line[m.end(1):],
'there should be no space before closing parenthesis',
m.start(1))
class BracesOnSeparateLineCheck:
# This will give false positives for C99 compound literals.
def __init__(self):
self.re = re.compile('(\)|else)\s*({)')
def check(self, filename, lineno, line):
m = self.re.search(line)
if m != None:
return CheckError(filename, lineno,
line[:m.start(2)] + error_string(m.group(2)) + line[m.end(2):],
'braces should be on a separate line', m.start(2))
class TrailinigOperatorCheck:
def __init__(self):
regex = '^\s.*(([^a-zA-Z_]\*)|([-%<=&|^?])|([^*]/)|([^:][+]))$'
self.re = re.compile(regex)
def check(self, filename, lineno, line):
m = self.re.search(line)
if m != None:
return CheckError(filename, lineno,
line[:m.start(1)] + error_string(m.group(1)) + line[m.end(1):],
'trailing operator', m.start(1))
class LineLengthTest(unittest.TestCase):
def setUp(self):
self.check = LineLengthCheck()
def test_line_length_check_basic(self):
r = self.check.check('foo', 123, self.check.limit * 'a' + ' = 123;')
self.assertIsNotNone(r)
self.assertEqual('foo', r.filename)
self.assertEqual(80, r.column)
self.assertEqual(r.console_error,
self.check.limit * 'a' + error_string(' = 123;'))
def main():
parser = argparse.ArgumentParser(description='Check GNU coding style.')
parser.add_argument('file', help = 'File with a patch')
parser.add_argument('-f', '--format', default = 'stdio',
help = 'Display format',
choices = ['stdio', 'quickfix'])
args = parser.parse_args()
checks = [LineLengthCheck(), SpacesCheck(), TrailingWhitespaceCheck(),
SentenceSeparatorCheck(), SentenceEndOfCommentCheck(),
SentenceDotEndCheck(), FunctionParenthesisCheck(),
SquareBracketCheck(), ClosingParenthesisCheck(),
BracesOnSeparateLineCheck(), TrailinigOperatorCheck()]
errors = []
with open(args.file, 'rb') as diff_file:
patch = PatchSet(diff_file, encoding = 'utf-8')
for pfile in patch.added_files + patch.modified_files:
t = pfile.target_file.lstrip('b/')
# Skip testsuite files
if 'testsuite' in t:
continue
for hunk in pfile:
delta = 0
for line in hunk:
if line.is_added and line.target_line_no != None:
for check in checks:
e = check.check(t, line.target_line_no, line.value)
if e != None:
errors.append(e)
if args.format == 'stdio':
fn = lambda x: x.error_message
i = 1
for (k, errors) in groupby(sorted(errors, key = fn), fn):
errors = list(errors)
print('=== ERROR type #%d: %s (%d error(s)) ==='
% (i, k, len(errors)))
i += 1
for e in errors:
print(e.error_location () + e.console_error)
print()
exit(0 if len(errors) == 0 else 1)
elif args.format == 'quickfix':
f = 'errors.err'
with open(f, 'w+') as qf:
for e in errors:
qf.write('%s%s\n' % (e.error_location(), e.error_message))
if len(errors) == 0:
exit(0)
else:
print('%d error(s) written to %s file.' % (len(errors), f))
exit(1)
else:
assert False
if __name__ == '__main__':
if len(sys.argv) > 1:
main()
else:
unittest.main()