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#!/usr/bin/env python
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#
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# check-code - a style and portability checker for Mercurial
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#
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# Copyright 2010 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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import re, glob, os, sys
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import optparse
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def repquote(m):
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t = re.sub(r"\w", "x", m.group('text'))
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t = re.sub(r"[^\sx]", "o", t)
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return m.group('quote') + t + m.group('quote')
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def reppython(m):
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comment = m.group('comment')
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if comment:
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return "#" * len(comment)
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return repquote(m)
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def repcomment(m):
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return m.group(1) + "#" * len(m.group(2))
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def repccomment(m):
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t = re.sub(r"((?<=\n) )|\S", "x", m.group(2))
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return m.group(1) + t + "*/"
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def repcallspaces(m):
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t = re.sub(r"\n\s+", "\n", m.group(2))
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return m.group(1) + t
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def repinclude(m):
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return m.group(1) + "<foo>"
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def rephere(m):
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t = re.sub(r"\S", "x", m.group(2))
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return m.group(1) + t
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testpats = [
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(r'(pushd|popd)', "don't use 'pushd' or 'popd', use 'cd'"),
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(r'\W\$?\(\([^\)]*\)\)', "don't use (()) or $(()), use 'expr'"),
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(r'^function', "don't use 'function', use old style"),
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(r'grep.*-q', "don't use 'grep -q', redirect to /dev/null"),
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(r'echo.*\\n', "don't use 'echo \\n', use printf"),
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(r'echo -n', "don't use 'echo -n', use printf"),
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(r'^diff.*-\w*N', "don't use 'diff -N'"),
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(r'(^| )wc[^|]*$', "filter wc output"),
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(r'head -c', "don't use 'head -c', use 'dd'"),
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(r'ls.*-\w*R', "don't use 'ls -R', use 'find'"),
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(r'printf.*\\\d\d\d', "don't use 'printf \NNN', use Python"),
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(r'printf.*\\x', "don't use printf \\x, use Python"),
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(r'\$\(.*\)', "don't use $(expr), use `expr`"),
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(r'rm -rf \*', "don't use naked rm -rf, target a directory"),
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(r'(^|\|\s*)grep (-\w\s+)*[^|]*[(|]\w',
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"use egrep for extended grep syntax"),
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(r'/bin/', "don't use explicit paths for tools"),
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(r'\$PWD', "don't use $PWD, use `pwd`"),
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(r'[^\n]\Z', "no trailing newline"),
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(r'export.*=', "don't export and assign at once"),
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('^([^"\']|("[^"]*")|(\'[^\']*\'))*\\^', "^ must be quoted"),
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(r'^source\b', "don't use 'source', use '.'"),
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(r'touch -d', "don't use 'touch -d', use 'touch -t' instead"),
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(r'ls\s+[^-]+\s+-', "options to 'ls' must come before filenames"),
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]
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testfilters = [
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(r"( *)(#([^\n]*\S)?)", repcomment),
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(r"<<(\S+)((.|\n)*?\n\1)", rephere),
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]
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uprefix = r"^ \$ "
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uprefixc = r"^ > "
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utestpats = [
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(r'^(\S| $ ).*(\S\s+|^\s+)\n', "trailing whitespace on non-output"),
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(uprefix + r'.*\|\s*sed', "use regex test output patterns instead of sed"),
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(uprefix + r'(true|exit 0)', "explicit zero exit unnecessary"),
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(uprefix + r'.*\$\?', "explicit exit code checks unnecessary"),
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(uprefix + r'.*\|\| echo.*(fail|error)',
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"explicit exit code checks unnecessary"),
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(uprefix + r'set -e', "don't use set -e"),
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(uprefixc + r'( *)\t', "don't use tabs to indent"),
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]
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for p, m in testpats:
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if p.startswith('^'):
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p = uprefix + p[1:]
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else:
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p = uprefix + p
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utestpats.append((p, m))
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utestfilters = [
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(r"( *)(#([^\n]*\S)?)", repcomment),
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]
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pypats = [
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(r'^\s*def\s*\w+\s*\(.*,\s*\(',
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"tuple parameter unpacking not available in Python 3+"),
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(r'lambda\s*\(.*,.*\)',
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"tuple parameter unpacking not available in Python 3+"),
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(r'(?<!def)\s+(cmp)\(', "cmp is not available in Python 3+"),
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(r'\breduce\s*\(.*', "reduce is not available in Python 3+"),
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(r'\.has_key\b', "dict.has_key is not available in Python 3+"),
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(r'^\s*\t', "don't use tabs"),
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(r'\S;\s*\n', "semicolon"),
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(r'\w,\w', "missing whitespace after ,"),
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(r'\w[+/*\-<>]\w', "missing whitespace in expression"),
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(r'^\s+\w+=\w+[^,)]$', "missing whitespace in assignment"),
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(r'.{85}', "line too long"),
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(r'.{81}', "warning: line over 80 characters"),
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(r'[^\n]\Z', "no trailing newline"),
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(r'(\S\s+|^\s+)\n', "trailing whitespace"),
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# (r'^\s+[^_ ][^_. ]+_[^_]+\s*=', "don't use underbars in identifiers"),
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# (r'\w*[a-z][A-Z]\w*\s*=', "don't use camelcase in identifiers"),
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(r'^\s*(if|while|def|class|except|try)\s[^[]*:\s*[^\]#\s]+',
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"linebreak after :"),
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(r'class\s[^(]:', "old-style class, use class foo(object)"),
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(r'^\s+del\(', "del isn't a function"),
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(r'\band\(', "and isn't a function"),
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(r'\bor\(', "or isn't a function"),
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(r'\bnot\(', "not isn't a function"),
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(r'^\s+except\(', "except isn't a function"),
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(r',]', "unneeded trailing ',' in list"),
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# (r'class\s[A-Z][^\(]*\((?!Exception)',
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# "don't capitalize non-exception classes"),
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# (r'in range\(', "use xrange"),
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# (r'^\s*print\s+', "avoid using print in core and extensions"),
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(r'[\x80-\xff]', "non-ASCII character literal"),
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(r'("\')\.format\(', "str.format() not available in Python 2.4"),
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(r'^\s*with\s+', "with not available in Python 2.4"),
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(r'(?<!def)\s+(any|all|format)\(',
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"any/all/format not available in Python 2.4"),
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(r'(?<!def)\s+(callable)\(',
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"callable not available in Python 3, use hasattr(f, '__call__')"),
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(r'if\s.*\selse', "if ... else form not available in Python 2.4"),
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(r'([\(\[]\s\S)|(\S\s[\)\]])', "gratuitous whitespace in () or []"),
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# (r'\s\s=', "gratuitous whitespace before ="),
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(r'[^>< ](\+=|-=|!=|<>|<=|>=|<<=|>>=)\S',
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"missing whitespace around operator"),
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(r'[^>< ](\+=|-=|!=|<>|<=|>=|<<=|>>=)\s',
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"missing whitespace around operator"),
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(r'\s(\+=|-=|!=|<>|<=|>=|<<=|>>=)\S',
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"missing whitespace around operator"),
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(r'[^+=*!<>&| -](\s=|=\s)[^= ]',
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"wrong whitespace around ="),
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(r'raise Exception', "don't raise generic exceptions"),
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(r'ui\.(status|progress|write|note|warn)\([\'\"]x',
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"warning: unwrapped ui message"),
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(r' is\s+(not\s+)?["\'0-9-]', "object comparison with literal"),
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]
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pyfilters = [
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(r"""(?msx)(?P<comment>\#.*?$)|
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((?P<quote>('''|\"\"\"|(?<!')'(?!')|(?<!")"(?!")))
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(?P<text>(([^\\]|\\.)*?))
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(?P=quote))""", reppython),
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]
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cpats = [
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(r'//', "don't use //-style comments"),
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(r'^ ', "don't use spaces to indent"),
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(r'\S\t', "don't use tabs except for indent"),
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(r'(\S\s+|^\s+)\n', "trailing whitespace"),
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(r'.{85}', "line too long"),
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(r'(while|if|do|for)\(', "use space after while/if/do/for"),
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(r'return\(', "return is not a function"),
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(r' ;', "no space before ;"),
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(r'\w+\* \w+', "use int *foo, not int* foo"),
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(r'\([^\)]+\) \w+', "use (int)foo, not (int) foo"),
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(r'\S+ (\+\+|--)', "use foo++, not foo ++"),
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(r'\w,\w', "missing whitespace after ,"),
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(r'\w[+/*]\w', "missing whitespace in expression"),
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(r'^#\s+\w', "use #foo, not # foo"),
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(r'[^\n]\Z', "no trailing newline"),
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]
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cfilters = [
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(r'(/\*)(((\*(?!/))|[^*])*)\*/', repccomment),
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(r'''(?P<quote>(?<!")")(?P<text>([^"]|\\")+)"(?!")''', repquote),
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(r'''(#\s*include\s+<)([^>]+)>''', repinclude),
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(r'(\()([^)]+\))', repcallspaces),
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]
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checks = [
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('python', r'.*\.(py|cgi)$', pyfilters, pypats),
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('test script', r'(.*/)?test-[^.~]*$', testfilters, testpats),
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('c', r'.*\.c$', cfilters, cpats),
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('unified test', r'.*\.t$', utestfilters, utestpats),
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]
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class norepeatlogger(object):
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def __init__(self):
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self._lastseen = None
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def log(self, fname, lineno, line, msg, blame):
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"""print error related a to given line of a given file.
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The faulty line will also be printed but only once in the case
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of multiple errors.
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:fname: filename
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:lineno: line number
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:line: actual content of the line
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:msg: error message
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"""
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msgid = fname, lineno, line
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if msgid != self._lastseen:
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if blame:
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print "%s:%d (%s):" % (fname, lineno, blame)
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else:
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print "%s:%d:" % (fname, lineno)
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print " > %s" % line
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self._lastseen = msgid
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print " " + msg
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_defaultlogger = norepeatlogger()
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def getblame(f):
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lines = []
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for l in os.popen('hg annotate -un %s' % f):
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start, line = l.split(':', 1)
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user, rev = start.split()
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lines.append((line[1:-1], user, rev))
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return lines
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def checkfile(f, logfunc=_defaultlogger.log, maxerr=None, warnings=False,
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blame=False):
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"""checks style and portability of a given file
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:f: filepath
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:logfunc: function used to report error
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logfunc(filename, linenumber, linecontent, errormessage)
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:maxerr: number of error to display before arborting.
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Set to None (default) to report all errors
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return True if no error is found, False otherwise.
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"""
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blamecache = None
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result = True
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for name, match, filters, pats in checks:
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fc = 0
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if not re.match(match, f):
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continue
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pre = post = open(f).read()
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if "no-" + "check-code" in pre:
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break
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for p, r in filters:
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post = re.sub(p, r, post)
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# print post # uncomment to show filtered version
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z = enumerate(zip(pre.splitlines(), post.splitlines(True)))
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for n, l in z:
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if "check-code" + "-ignore" in l[0]:
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continue
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for p, msg in pats:
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if not warnings and msg.startswith("warning"):
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continue
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if re.search(p, l[1]):
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bd = ""
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if blame:
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bd = 'working directory'
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if not blamecache:
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blamecache = getblame(f)
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if n < len(blamecache):
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bl, bu, br = blamecache[n]
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if bl == l[0]:
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bd = '%s@%s' % (bu, br)
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logfunc(f, n + 1, l[0], msg, bd)
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fc += 1
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result = False
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if maxerr is not None and fc >= maxerr:
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print " (too many errors, giving up)"
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break
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break
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return result
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if __name__ == "__main__":
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parser = optparse.OptionParser("%prog [options] [files]")
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parser.add_option("-w", "--warnings", action="store_true",
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help="include warning-level checks")
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parser.add_option("-p", "--per-file", type="int",
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help="max warnings per file")
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parser.add_option("-b", "--blame", action="store_true",
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help="use annotate to generate blame info")
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parser.set_defaults(per_file=15, warnings=False, blame=False)
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(options, args) = parser.parse_args()
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if len(args) == 0:
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check = glob.glob("*")
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else:
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check = args
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for f in check:
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ret = 0
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if not checkfile(f, maxerr=options.per_file, warnings=options.warnings,
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blame=options.blame):
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ret = 1
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sys.exit(ret)
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