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#!/usr/bin/env python
"""
Checker for file headers
~~~~~~~~~~~~~~~~~~~~~~~~
Make sure each Python file has a correct file header
including copyright and license information.
:copyright: Copyright 2006-2021 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import io
import os
import re
import sys
import getopt
from os.path import join, splitext, abspath
checkers = {}
def checker(*suffixes, **kwds):
only_pkg = kwds.pop('only_pkg', False)
def deco(func):
for suffix in suffixes:
checkers.setdefault(suffix, []).append(func)
func.only_pkg = only_pkg
return func
return deco
name_mail_re = r'[\w ]+(<.*?>)?'
copyright_re = re.compile(r'^ :copyright: Copyright 2006-2021 by '
r'the Pygments team, see AUTHORS\.$', re.UNICODE)
copyright_2_re = re.compile(r'^ %s(, %s)*[,.]$' %
(name_mail_re, name_mail_re), re.UNICODE)
is_const_re = re.compile(r'if.*?==\s+(None|False|True)\b')
misspellings = ["developement", "adress", "verificate", # ALLOW-MISSPELLING
"informations", "unlexer"] # ALLOW-MISSPELLING
@checker('.py')
def check_syntax(fn, lines):
if not lines:
yield 0, "empty file"
return
if '#!/' in lines[0]:
lines = lines[1:]
if 'coding:' in lines[0]:
lines = lines[1:]
try:
compile('\n'.join(lines), fn, "exec")
except SyntaxError as err:
yield 0, "not compilable: %s" % err
@checker('.py')
def check_style_and_encoding(fn, lines):
for lno, line in enumerate(lines):
if len(line) > 110:
yield lno+1, "line too long"
if is_const_re.search(line):
yield lno+1, 'using == None/True/False'
@checker('.py', only_pkg=True)
def check_fileheader(fn, lines):
# line number correction
c = 1
if lines[0:1] == ['#!/usr/bin/env python']:
lines = lines[1:]
c = 2
llist = []
docopen = False
for lno, l in enumerate(lines):
llist.append(l)
if lno == 0:
if l != '# -*- coding: utf-8 -*-':
yield 1, "missing coding declaration"
elif lno == 1:
if l != '"""' and l != 'r"""':
yield 2, 'missing docstring begin (""")'
else:
docopen = True
elif docopen:
if l == '"""':
# end of docstring
if lno <= 4:
yield lno+c, "missing module name in docstring"
break
if l != "" and l[:4] != ' ' and docopen:
yield lno+c, "missing correct docstring indentation"
if lno == 2:
# if not in package, don't check the module name
modname = fn[:-3].replace('/', '.').replace('.__init__', '')
while modname:
if l.lower()[4:] == modname:
break
modname = '.'.join(modname.split('.')[1:])
else:
yield 3, "wrong module name in docstring heading"
modnamelen = len(l.strip())
elif lno == 3:
if l.strip() != modnamelen * "~":
yield 4, "wrong module name underline, should be ~~~...~"
else:
yield 0, "missing end and/or start of docstring..."
# check for copyright and license fields
license = llist[-2:-1]
if license != [" :license: BSD, see LICENSE for details."]:
yield 0, "no correct license info"
ci = -3
copyright = llist[ci:ci+1]
while copyright and copyright_2_re.match(copyright[0]):
ci -= 1
copyright = llist[ci:ci+1]
if not copyright or not copyright_re.match(copyright[0]):
yield 0, "no correct copyright info"
def main(argv):
try:
gopts, args = getopt.getopt(argv[1:], "vi:")
except getopt.GetoptError:
print("Usage: %s [-v] [-i ignorepath]* [path]" % argv[0])
return 2
opts = {}
for opt, val in gopts:
if opt == '-i':
val = abspath(val)
opts.setdefault(opt, []).append(val)
if len(args) == 0:
path = '.'
elif len(args) == 1:
path = args[0]
else:
print("Usage: %s [-v] [-i ignorepath]* [path]" % argv[0])
return 2
verbose = '-v' in opts
num = 0
out = io.StringIO()
# TODO: replace os.walk run with iteration over output of
# `svn list -R`.
for root, dirs, files in os.walk(path):
if '.hg' in dirs:
dirs.remove('.hg')
if 'examplefiles' in dirs:
dirs.remove('examplefiles')
if '-i' in opts and abspath(root) in opts['-i']:
del dirs[:]
continue
# XXX: awkward: for the Makefile call: don't check non-package
# files for file headers
in_pygments_pkg = root.startswith('./pygments')
for fn in files:
fn = join(root, fn)
if fn[:2] == './':
fn = fn[2:]
if '-i' in opts and abspath(fn) in opts['-i']:
continue
ext = splitext(fn)[1]
checkerlist = checkers.get(ext, None)
if not checkerlist:
continue
if verbose:
print("Checking %s..." % fn)
try:
with open(fn, 'rb') as f:
lines = f.read().decode('utf-8').splitlines()
except OSError as err:
print("%s: cannot open: %s" % (fn, err))
num += 1
continue
for checker in checkerlist:
if not in_pygments_pkg and checker.only_pkg:
continue
for lno, msg in checker(fn, lines):
print('%s:%d: %s' % (fn, lno, msg), file=out)
num += 1
if verbose:
print()
if num == 0:
print("No errors found.")
else:
print(out.getvalue().rstrip('\n'))
print("%d error%s found." % (num, num > 1 and "s" or ""))
return int(num > 0)
if __name__ == '__main__':
sys.exit(main(sys.argv))
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