#!/usr/bin/env python
#
# check-code - a style and portability checker for Mercurial
#
# Copyright 2010 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
import re, glob
import optparse
def repquote(m):
t = re.sub(r"\w", "x", m.group('text'))
t = re.sub(r"[^\sx]", "o", t)
return m.group('quote') + t + m.group('quote')
def reppython(m):
comment = m.group('comment')
if comment:
return "#" * len(comment)
return repquote(m)
def repcomment(m):
return m.group(1) + "#" * len(m.group(2))
def repccomment(m):
t = re.sub(r"((?<=\n) )|\S", "x", m.group(2))
return m.group(1) + t + "*/"
def repcallspaces(m):
t = re.sub(r"\n\s+", "\n", m.group(2))
return m.group(1) + t
def repinclude(m):
return m.group(1) + "<foo>"
def rephere(m):
t = re.sub(r"\S", "x", m.group(2))
return m.group(1) + t
testpats = [
(r'(pushd|popd)', "don't use 'pushd' or 'popd', use 'cd'"),
(r'\W\$?\(\([^\)]*\)\)', "don't use (()) or $(()), use 'expr'"),
(r'^function', "don't use 'function', use old style"),
(r'grep.*-q', "don't use 'grep -q', redirect to /dev/null"),
(r'echo.*\\n', "don't use 'echo \\n', use printf"),
(r'^diff.*-\w*N', "don't use 'diff -N'"),
(r'(^| )wc[^|]*$', "filter wc output"),
(r'head -c', "don't use 'head -c', use 'dd'"),
(r'ls.*-\w*R', "don't use 'ls -R', use 'find'"),
(r'printf.*\\\d\d\d', "don't use 'printf \NNN', use Python"),
(r'printf.*\\x', "don't use printf \\x, use Python"),
(r'\$\(.*\)', "don't use $(expr), use `expr`"),
(r'rm -rf \*', "don't use naked rm -rf, target a directory"),
(r'(^|\|\s*)grep (-\w\s+)*[^|]*[(|]\w',
"use egrep for extended grep syntax"),
(r'/bin/', "don't use explicit paths for tools"),
(r'\$PWD', "don't use $PWD, use `pwd`"),
(r'[^\n]\Z', "no trailing newline"),
(r'export.*=', "don't export and assign at once"),
('^([^"\']|("[^"]*")|(\'[^\']*\'))*\\^', "^ must be quoted"),
(r'^source\b', "don't use 'source', use '.'"),
]
testfilters = [
(r"( *)(#([^\n]*\S)?)", repcomment),
(r"<<(\S+)((.|\n)*?\n\1)", rephere),
]
pypats = [
(r'^\s*\t', "don't use tabs"),
(r'\S;\s*\n', "semicolon"),
(r'\w,\w', "missing whitespace after ,"),
(r'\w[+/*\-<>]\w', "missing whitespace in expression"),
(r'^\s+\w+=\w+[^,)]$', "missing whitespace in assignment"),
(r'.{85}', "line too long"),
(r'[^\n]\Z', "no trailing newline"),
# (r'^\s+[^_ ][^_. ]+_[^_]+\s*=', "don't use underbars in identifiers"),
# (r'\w*[a-z][A-Z]\w*\s*=', "don't use camelcase in identifiers"),
(r'^\s*(if|while|def|class|except|try)\s[^[]*:\s*[^\]#\s]+',
"linebreak after :"),
(r'class\s[^(]:', "old-style class, use class foo(object)"),
(r'^\s+del\(', "del isn't a function"),
(r'^\s+except\(', "except isn't a function"),
(r',]', "unneeded trailing ',' in list"),
# (r'class\s[A-Z][^\(]*\((?!Exception)',
# "don't capitalize non-exception classes"),
# (r'in range\(', "use xrange"),
# (r'^\s*print\s+', "avoid using print in core and extensions"),
(r'[\x80-\xff]', "non-ASCII character literal"),
(r'("\')\.format\(', "str.format() not available in Python 2.4"),
(r'^\s*with\s+', "with not available in Python 2.4"),
(r'(?<!def)\s+(any|all|format)\(', "any/all/format not available in Python 2.4"),
(r'if\s.*\selse', "if ... else form not available in Python 2.4"),
(r'([\(\[]\s\S)|(\S\s[\)\]])', "gratuitous whitespace in () or []"),
# (r'\s\s=', "gratuitous whitespace before ="),
(r'[^>< ](\+=|-=|!=|<>|<=|>=|<<=|>>=)\S', "missing whitespace around operator"),
(r'[^>< ](\+=|-=|!=|<>|<=|>=|<<=|>>=)\s', "missing whitespace around operator"),
(r'\s(\+=|-=|!=|<>|<=|>=|<<=|>>=)\S', "missing whitespace around operator"),
(r'[^+=*!<>&| -](\s=|=\s)[^= ]', "wrong whitespace around ="),
(r'raise Exception', "don't raise generic exceptions"),
(r'ui\.(status|progress|write|note)\([\'\"]x',
"warning: unwrapped ui message"),
]
pyfilters = [
(r"""(?msx)(?P<comment>\#.*?$)|
((?P<quote>('''|\"\"\"|(?<!')'(?!')|(?<!")"(?!")))
(?P<text>(([^\\]|\\.)*?))
(?P=quote))""", reppython),
]
cpats = [
(r'//', "don't use //-style comments"),
(r'^ ', "don't use spaces to indent"),
(r'\S\t', "don't use tabs except for indent"),
(r'(\S\s+|^\s+)\n', "trailing whitespace"),
(r'.{85}', "line too long"),
(r'(while|if|do|for)\(', "use space after while/if/do/for"),
(r'return\(', "return is not a function"),
(r' ;', "no space before ;"),
(r'\w+\* \w+', "use int *foo, not int* foo"),
(r'\([^\)]+\) \w+', "use (int)foo, not (int) foo"),
(r'\S+ (\+\+|--)', "use foo++, not foo ++"),
(r'\w,\w', "missing whitespace after ,"),
(r'\w[+/*]\w', "missing whitespace in expression"),
(r'^#\s+\w', "use #foo, not # foo"),
(r'[^\n]\Z', "no trailing newline"),
]
cfilters = [
(r'(/\*)(((\*(?!/))|[^*])*)\*/', repccomment),
(r'''(?P<quote>(?<!")")(?P<text>([^"]|\\")+)"(?!")''', repquote),
(r'''(#\s*include\s+<)([^>]+)>''', repinclude),
(r'(\()([^)]+\))', repcallspaces),
]
checks = [
('python', r'.*\.(py|cgi)$', pyfilters, pypats),
('test script', r'(.*/)?test-[^.~]*$', testfilters, testpats),
('c', r'.*\.c$', cfilters, cpats),
]
class norepeatlogger(object):
def __init__(self):
self._lastseen = None
def log(self, fname, lineno, line, msg):
"""print error related a to given line of a given file.
The faulty line will also be printed but only once in the case
of multiple errors.
:fname: filename
:lineno: line number
:line: actual content of the line
:msg: error message
"""
msgid = fname, lineno, line
if msgid != self._lastseen:
print "%s:%d:" % (fname, lineno)
print " > %s" % line
self._lastseen = msgid
print " " + msg
_defaultlogger = norepeatlogger()
def checkfile(f, logfunc=_defaultlogger.log, maxerr=None, warnings=False):
"""checks style and portability of a given file
:f: filepath
:logfunc: function used to report error
logfunc(filename, linenumber, linecontent, errormessage)
:maxerr: number of error to display before arborting.
Set to None (default) to report all errors
return True if no error is found, False otherwise.
"""
result = True
for name, match, filters, pats in checks:
fc = 0
if not re.match(match, f):
continue
pre = post = open(f).read()
if "no-" + "check-code" in pre:
break
for p, r in filters:
post = re.sub(p, r, post)
# print post # uncomment to show filtered version
z = enumerate(zip(pre.splitlines(), post.splitlines(True)))
for n, l in z:
if "check-code" + "-ignore" in l[0]:
continue
for p, msg in pats:
if not warnings and msg.startswith("warning"):
continue
if re.search(p, l[1]):
logfunc(f, n + 1, l[0], msg)
fc += 1
result = False
if maxerr is not None and fc >= maxerr:
print " (too many errors, giving up)"
break
break
return result
if __name__ == "__main__":
parser = optparse.OptionParser("%prog [options] [files]")
parser.add_option("-w", "--warnings", action="store_true",
help="include warning-level checks")
parser.add_option("-p", "--per-file", type="int",
help="max warnings per file")
parser.set_defaults(per_file=15, warnings=False)
(options, args) = parser.parse_args()
if len(args) == 0:
check = glob.glob("*")
else:
check = args
for f in check:
checkfile(f, maxerr=options.per_file, warnings=options.warnings)