upstream/mercurial-mirror Commit - r26777:df1a29ec

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#!/usr/bin/env python

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#!/usr/bin/env python

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#

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#

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# check-code - a style and portability checker for Mercurial

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# check-code - a style and portability checker for Mercurial

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#

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#

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#

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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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# 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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# GNU General Public License version 2 or any later version.

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"""style and portability checker for Mercurial

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"""style and portability checker for Mercurial

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when a rule triggers wrong, do one of the following (prefer one from top):

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when a rule triggers wrong, do one of the following (prefer one from top):

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* do the work-around the rule suggests

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* do the work-around the rule suggests

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* doublecheck that it is a false match

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* doublecheck that it is a false match

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* improve the rule pattern

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* improve the rule pattern

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* add an ignore pattern to the rule (3rd arg) which matches your good line

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* add an ignore pattern to the rule (3rd arg) which matches your good line

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(you can append a short comment and match this, like: #re-raises, # no-py24)

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(you can append a short comment and match this, like: #re-raises, # no-py24)

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* change the pattern to a warning and list the exception in test-check-code-hg

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* change the pattern to a warning and list the exception in test-check-code-hg

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* ONLY use no--check-code for skipping entire files from external sources

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* ONLY use no--check-code for skipping entire files from external sources

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"""

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"""

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import re, glob, os, sys

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import re, glob, os, sys

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import keyword

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import keyword

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import optparse

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import optparse

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try:

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try:

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import re2

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import re2

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except ImportError:

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except ImportError:

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re2 = None

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re2 = None

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def compilere(pat, multiline=False):

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def compilere(pat, multiline=False):

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if multiline:

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if multiline:

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pat = '(?m)' + pat

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pat = '(?m)' + pat

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if re2:

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if re2:

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try:

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try:

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return re2.compile(pat)

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return re2.compile(pat)

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except re2.error:

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except re2.error:

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pass

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pass

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return re.compile(pat)

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return re.compile(pat)

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def repquote(m):

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def repquote(m):

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fromc = '.:'

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fromc = '.:'

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tochr = 'pq'

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tochr = 'pq'

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def encodechr(i):

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def encodechr(i):

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if i > 255:

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if i > 255:

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return 'u'

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return 'u'

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c = chr(i)

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c = chr(i)

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if c in ' \n':

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if c in ' \n':

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return c

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return c

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if c.isalpha():

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if c.isalpha():

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return 'x'

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return 'x'

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if c.isdigit():

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if c.isdigit():

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return 'n'

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return 'n'

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try:

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try:

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return tochr[fromc.find(c)]

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return tochr[fromc.find(c)]

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except (ValueError, IndexError):

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except (ValueError, IndexError):

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return 'o'

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return 'o'

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t = m.group('text')

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t = m.group('text')

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tt = ''.join(encodechr(i) for i in xrange(256))

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tt = ''.join(encodechr(i) for i in xrange(256))

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t = t.translate(tt)

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t = t.translate(tt)

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return m.group('quote') + t + m.group('quote')

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return m.group('quote') + t + m.group('quote')

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def reppython(m):

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def reppython(m):

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comment = m.group('comment')

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comment = m.group('comment')

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if comment:

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if comment:

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l = len(comment.rstrip())

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l = len(comment.rstrip())

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return "#" * l + comment[l:]

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return "#" * l + comment[l:]

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return repquote(m)

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return repquote(m)

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def repcomment(m):

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def repcomment(m):

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return m.group(1) + "#" * len(m.group(2))

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return m.group(1) + "#" * len(m.group(2))

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def repccomment(m):

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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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t = re.sub(r"((?<=\n) )|\S", "x", m.group(2))

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return m.group(1) + t + "*/"

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return m.group(1) + t + "*/"

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def repcallspaces(m):

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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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t = re.sub(r"\n\s+", "\n", m.group(2))

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return m.group(1) + t

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return m.group(1) + t

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def repinclude(m):

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def repinclude(m):

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return m.group(1) + "<foo>"

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return m.group(1) + "<foo>"

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def rephere(m):

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def rephere(m):

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t = re.sub(r"\S", "x", m.group(2))

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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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return m.group(1) + t

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testpats = [

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testpats = [

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[

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[

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(r'pushd|popd', "don't use 'pushd' or 'popd', use 'cd'"),

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(r'pushd|popd', "don't use 'pushd' or 'popd', use 'cd'"),

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(r'\W\$?$\([^$\n]*\)\)', "don't use (()) or $(()), use 'expr'"),

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(r'\W\$?$\([^$\n]*\)\)', "don't use (()) or $(()), use 'expr'"),

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(r'grep.*-q', "don't use 'grep -q', redirect to /dev/null"),

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(r'grep.*-q', "don't use 'grep -q', redirect to /dev/null"),

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(r'(?<!hg )grep.*-a', "don't use 'grep -a', use in-line python"),

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(r'(?<!hg )grep.*-a', "don't use 'grep -a', use in-line python"),

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(r'sed.*-i', "don't use 'sed -i', use a temporary file"),

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(r'sed.*-i', "don't use 'sed -i', use a temporary file"),

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(r'\becho\b.*\\n', "don't use 'echo \\n', use printf"),

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(r'\becho\b.*\\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'echo -n', "don't use 'echo -n', use printf"),

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(r'(^|\|\s*)\bwc\b[^|]*$\n(?!.*$re$)', "filter wc output"),

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(r'(^|\|\s*)\bwc\b[^|]*$\n(?!.*$re$)', "filter wc output"),

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(r'head -c', "don't use 'head -c', use 'dd'"),

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(r'head -c', "don't use 'head -c', use 'dd'"),

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(r'tail -n', "don't use the '-n' option to tail, just use '-<num>'"),

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(r'tail -n', "don't use the '-n' option to tail, just use '-<num>'"),

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(r'sha1sum', "don't use sha1sum, use $TESTDIR/md5sum.py"),

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(r'sha1sum', "don't use sha1sum, use $TESTDIR/md5sum.py"),

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(r'ls.*-\w*R', "don't use 'ls -R', use 'find'"),

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(r'ls.*-\w*R', "don't use 'ls -R', use 'find'"),

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(r'printf.*[^\\]\\([1-9]|0\d)', "don't use 'printf \NNN', use Python"),

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(r'printf.*[^\\]\\([1-9]|0\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'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'\$$.*$', "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'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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(r'(^|\|\s*)grep (-\w\s+)*[^|]*[(|]\w',

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"use egrep for extended grep syntax"),

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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'/bin/', "don't use explicit paths for tools"),

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(r'[^\n]\Z', "no trailing newline"),

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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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(r'export.*=', "don't export and assign at once"),

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(r'^source\b', "don't use 'source', use '.'"),

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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'touch -d', "don't use 'touch -d', use 'touch -t' instead"),

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(r'ls +[^|\n-]+ +-', "options to 'ls' must come before filenames"),

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(r'ls +[^|\n-]+ +-', "options to 'ls' must come before filenames"),

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(r'[^>\n]>\s*\$HGRCPATH', "don't overwrite $HGRCPATH, append to it"),

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(r'[^>\n]>\s*\$HGRCPATH', "don't overwrite $HGRCPATH, append to it"),

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(r'^stop', "don't use 'stop' as a shell function name"),

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(r'^stop', "don't use 'stop' as a shell function name"),

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(r'(\[|\btest\b).*-e ', "don't use 'test -e', use 'test -f'"),

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(r'(\[|\btest\b).*-e ', "don't use 'test -e', use 'test -f'"),

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(r'\[\[\s+[^\]]*\]\]', "don't use '[[ ]]', use '[ ]'"),

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(r'\[\[\s+[^\]]*\]\]', "don't use '[[ ]]', use '[ ]'"),

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(r'^alias\b.*=', "don't use alias, use a function"),

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(r'^alias\b.*=', "don't use alias, use a function"),

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(r'if\s*!', "don't use '!' to negate exit status"),

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(r'if\s*!', "don't use '!' to negate exit status"),

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(r'/dev/u?random', "don't use entropy, use /dev/zero"),

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(r'/dev/u?random', "don't use entropy, use /dev/zero"),

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(r'do\s*true;\s*done', "don't use true as loop body, use sleep 0"),

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(r'do\s*true;\s*done', "don't use true as loop body, use sleep 0"),

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(r'^( *)\t', "don't use tabs to indent"),

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(r'^( *)\t', "don't use tabs to indent"),

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(r'sed (-e )?\'(\d+|/[^/]*/)i(?!\\\n)',

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(r'sed (-e )?\'(\d+|/[^/]*/)i(?!\\\n)',

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"put a backslash-escaped newline after sed 'i' command"),

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"put a backslash-escaped newline after sed 'i' command"),

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(r'^diff *-\w*u.*$\n(^ \$ |^$)', "prefix diff -u with cmp"),

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(r'^diff *-\w*u.*$\n(^ \$ |^$)', "prefix diff -u with cmp"),

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(r'seq ', "don't use 'seq', use $TESTDIR/seq.py"),

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(r'seq ', "don't use 'seq', use $TESTDIR/seq.py"),

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(r'\butil\.Abort\b', "directly use error.Abort"),

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(r'\butil\.Abort\b', "directly use error.Abort"),

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(r'\|&', "don't use |&, use 2>&1"),

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],

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],

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# warnings

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# warnings

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[

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[

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(r'^function', "don't use 'function', use old style"),

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(r'^function', "don't use 'function', use old style"),

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(r'^diff.*-\w*N', "don't use 'diff -N'"),

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(r'^diff.*-\w*N', "don't use 'diff -N'"),

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(r'\$PWD|\${PWD}', "don't use $PWD, use `pwd`"),

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(r'\$PWD|\${PWD}', "don't use $PWD, use `pwd`"),

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(r'^([^"\'\n]|("[^"\n]*")|(\'[^\'\n]*\'))*\^', "^ must be quoted"),

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(r'^([^"\'\n]|("[^"\n]*")|(\'[^\'\n]*\'))*\^', "^ must be quoted"),

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(r'kill (`|\$\()', "don't use kill, use killdaemons.py")

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(r'kill (`|\$\()', "don't use kill, use killdaemons.py")

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]

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]

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]

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]

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testfilters = [

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testfilters = [

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(r"( *)(#([^\n]*\S)?)", repcomment),

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(r"( *)(#([^\n]*\S)?)", repcomment),

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(r"<<(\S+)((.|\n)*?\n\1)", rephere),

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(r"<<(\S+)((.|\n)*?\n\1)", rephere),

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]

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]

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winglobmsg = "use (glob) to match Windows paths too"

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winglobmsg = "use (glob) to match Windows paths too"

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uprefix = r"^ \$ "

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uprefix = r"^ \$ "

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utestpats = [

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utestpats = [

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[

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[

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(r'^(\S.*|| [$>] .*)[ \t]\n', "trailing whitespace on non-output"),

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(r'^(\S.*|| [$>] .*)[ \t]\n', "trailing whitespace on non-output"),

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(uprefix + r'.*\|\s*sed[^|>\n]*\n',

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(uprefix + r'.*\|\s*sed[^|>\n]*\n',

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"use regex test output patterns instead of sed"),

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"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'(true|exit 0)', "explicit zero exit unnecessary"),

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(uprefix + r'.*(?<!\[)\$\?', "explicit exit code checks 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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(uprefix + r'.*\|\| echo.*(fail|error)',

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"explicit exit code checks unnecessary"),

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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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(uprefix + r'set -e', "don't use set -e"),

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(uprefix + r'(\s|fi\b|done\b)', "use > for continued lines"),

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(uprefix + r'(\s|fi\b|done\b)', "use > for continued lines"),

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(uprefix + r'.*:\.\S*/', "x:.y in a path does not work on msys, rewrite "

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(uprefix + r'.*:\.\S*/', "x:.y in a path does not work on msys, rewrite "

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"as x://.y, or see `hg log -k msys` for alternatives", r'-\S+:\.|' #-Rxxx

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"as x://.y, or see `hg log -k msys` for alternatives", r'-\S+:\.|' #-Rxxx

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'# no-msys'), # in test-pull.t which is skipped on windows

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'# no-msys'), # in test-pull.t which is skipped on windows

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(r'^ saved backup bundle to \$TESTTMP.*\.hg$', winglobmsg),

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(r'^ saved backup bundle to \$TESTTMP.*\.hg$', winglobmsg),

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(r'^ changeset .* references (corrupted|missing) \$TESTTMP/.*[^)]$',

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(r'^ changeset .* references (corrupted|missing) \$TESTTMP/.*[^)]$',

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winglobmsg),

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winglobmsg),

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(r'^ pulling from \$TESTTMP/.*[^)]$', winglobmsg,

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(r'^ pulling from \$TESTTMP/.*[^)]$', winglobmsg,

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'\$TESTTMP/unix-repo$'), # in test-issue1802.t which skipped on windows

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'\$TESTTMP/unix-repo$'), # in test-issue1802.t which skipped on windows

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(r'^ reverting (?!subrepo ).*/.*[^)]$', winglobmsg),

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(r'^ reverting (?!subrepo ).*/.*[^)]$', winglobmsg),

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(r'^ cloning subrepo \S+/.*[^)]$', winglobmsg),

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(r'^ cloning subrepo \S+/.*[^)]$', winglobmsg),

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(r'^ pushing to \$TESTTMP/.*[^)]$', winglobmsg),

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(r'^ pushing to \$TESTTMP/.*[^)]$', winglobmsg),

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(r'^ pushing subrepo \S+/\S+ to.*[^)]$', winglobmsg),

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(r'^ pushing subrepo \S+/\S+ to.*[^)]$', winglobmsg),

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(r'^ moving \S+/.*[^)]$', winglobmsg),

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(r'^ moving \S+/.*[^)]$', winglobmsg),

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(r'^ no changes made to subrepo since.*/.*[^)]$', winglobmsg),

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(r'^ no changes made to subrepo since.*/.*[^)]$', winglobmsg),

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(r'^ .*: largefile \S+ not available from file:.*/.*[^)]$', winglobmsg),

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(r'^ .*: largefile \S+ not available from file:.*/.*[^)]$', winglobmsg),

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(r'^ .*file://\$TESTTMP',

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(r'^ .*file://\$TESTTMP',

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'write "file:/*/$TESTTMP" + (glob) to match on windows too'),

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'write "file:/*/$TESTTMP" + (glob) to match on windows too'),

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(r'^ (cat|find): .*: No such file or directory',

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(r'^ (cat|find): .*: No such file or directory',

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'use test -f to test for file existence'),

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'use test -f to test for file existence'),

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],

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],

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# warnings

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# warnings

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[

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[

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(r'^ [^*?/\n]* $glob$$',

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(r'^ [^*?/\n]* $glob$$',

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"glob match with no glob character (?*/)"),

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"glob match with no glob character (?*/)"),

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]

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]

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]

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]

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for i in [0, 1]:

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for i in [0, 1]:

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for tp in testpats[i]:

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for tp in testpats[i]:

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p = tp[0]

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p = tp[0]

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m = tp[1]

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m = tp[1]

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if p.startswith(r'^'):

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if p.startswith(r'^'):

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p = r"^ [$>] (%s)" % p[1:]

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p = r"^ [$>] (%s)" % p[1:]

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else:

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else:

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p = r"^ [$>] .*(%s)" % p

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p = r"^ [$>] .*(%s)" % p

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utestpats[i].append((p, m) + tp[2:])

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utestpats[i].append((p, m) + tp[2:])

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utestfilters = [

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utestfilters = [

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(r"<<(\S+)((.|\n)*?\n > \1)", rephere),

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(r"<<(\S+)((.|\n)*?\n > \1)", rephere),

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(r"( *)(#([^\n]*\S)?)", repcomment),

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(r"( *)(#([^\n]*\S)?)", repcomment),

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]

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]

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pypats = [

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pypats = [

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[

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[

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(r'\([^)]*\*\w[^()]+\w+=', "can't pass varargs with keyword in Py2.5"),

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(r'\([^)]*\*\w[^()]+\w+=', "can't pass varargs with keyword in Py2.5"),

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(r'^\s*def\s*\w+\s*\(.*,\s*\(',

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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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"tuple parameter unpacking not available in Python 3+"),

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(r'lambda\s*$.*,.*$',

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(r'lambda\s*$.*,.*$',

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"tuple parameter unpacking not available in Python 3+"),

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"tuple parameter unpacking not available in Python 3+"),

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(r'import (.+,[^.]+\.[^.]+|[^.]+\.[^.]+,)',

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(r'import (.+,[^.]+\.[^.]+|[^.]+\.[^.]+,)',

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'2to3 can\'t always rewrite "import qux, foo.bar", '

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'2to3 can\'t always rewrite "import qux, foo.bar", '

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'use "import foo.bar" on its own line instead.'),

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'use "import foo.bar" on its own line instead.'),

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(r'(?<!def)\s+(cmp)\(', "cmp is 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'\breduce\s*\(.*', "reduce is not available in Python 3+"),

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(r'dict\(.*=', 'dict() is different in Py2 and 3 and is slower than {}',

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(r'dict\(.*=', 'dict() is different in Py2 and 3 and is slower than {}',

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'dict-from-generator'),

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'dict-from-generator'),

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(r'\.has_key\b', "dict.has_key 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<>\s', '<> operator is not available in Python 3+, use !='),

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(r'\s<>\s', '<> operator is not available in Python 3+, use !='),

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(r'^\s*\t', "don't use tabs"),

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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'\S;\s*\n', "semicolon"),

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(r'[^_]_\([ \t\n]*(?:"[^"]+"[ \t\n+]*)+%', "don't use % inside _()"),

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(r'[^_]_\([ \t\n]*(?:"[^"]+"[ \t\n+]*)+%', "don't use % inside _()"),

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(r"[^_]_\([ \t\n]*(?:'[^']+'[ \t\n+]*)+%", "don't use % inside _()"),

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(r"[^_]_\([ \t\n]*(?:'[^']+'[ \t\n+]*)+%", "don't use % inside _()"),

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(r'(\w|\)),\w', "missing whitespace after ,"),

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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'(\w|\))[+/*\-<>]\w', "missing whitespace in expression"),

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(r'^\s+(\w|\.)+=\w[^,()\n]*$', "missing whitespace in assignment"),

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(r'^\s+(\w|\.)+=\w[^,()\n]*$', "missing whitespace in assignment"),

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(r'.{81}', "line too long"),

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(r'.{81}', "line too long"),

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(r' x+[xo][\'"]\n\s+[\'"]x', 'string join across lines with no space'),

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(r' x+[xo][\'"]\n\s+[\'"]x', 'string join across lines with no space'),

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(r'[^\n]\Z', "no trailing newline"),

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(r'[^\n]\Z', "no trailing newline"),

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(r'(\S[ \t]+|^[ \t]+)\n', "trailing whitespace"),

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(r'(\S[ \t]+|^[ \t]+)\n', "trailing whitespace"),

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# (r'^\s+[^_ \n][^_. \n]+_[^_\n]+\s*=',

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# (r'^\s+[^_ \n][^_. \n]+_[^_\n]+\s*=',

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# "don't use underbars in identifiers"),

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# "don't use underbars in identifiers"),

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(r'^\s+(self\.)?[A-za-z][a-z0-9]+[A-Z]\w* = ',

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(r'^\s+(self\.)?[A-za-z][a-z0-9]+[A-Z]\w* = ',

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"don't use camelcase in identifiers"),

230

"don't use camelcase in identifiers"),

230

231

231

"linebreak after :"),

232

"linebreak after :"),

232

(r'class\s[^( \n]+:', "old-style class, use class foo(object)"),

233

(r'class\s[^( \n]+:', "old-style class, use class foo(object)"),

233

(r'class\s[^( \n]+:',

234

(r'class\s[^( \n]+:',

234

"class foo() creates old style object, use class foo(object)"),

235

"class foo() creates old style object, use class foo(object)"),

235

(r'\b(%s)\(' % '|'.join(k for k in keyword.kwlist

236

(r'\b(%s)\(' % '|'.join(k for k in keyword.kwlist

236

if k not in ('print', 'exec')),

237

if k not in ('print', 'exec')),

237

"Python keyword is not a function"),

238

"Python keyword is not a function"),

238

(r',]', "unneeded trailing ',' in list"),

239

(r',]', "unneeded trailing ',' in list"),

239

# (r'class\s[A-Z][^\(]*\((?!Exception)',

240

# (r'class\s[A-Z][^\(]*\((?!Exception)',

240

# "don't capitalize non-exception classes"),

241

# "don't capitalize non-exception classes"),

241

# (r'in range\(', "use xrange"),

242

# (r'in range\(', "use xrange"),

242

# (r'^\s*print\s+', "avoid using print in core and extensions"),

243

# (r'^\s*print\s+', "avoid using print in core and extensions"),

243

(r'[\x80-\xff]', "non-ASCII character literal"),

244

(r'[\x80-\xff]', "non-ASCII character literal"),

244

(r'("\')\.format\(', "str.format() has no bytes counterpart, use %"),

245

(r'("\')\.format\(', "str.format() has no bytes counterpart, use %"),

245

(r'^\s*(%s)\s\s' % '|'.join(keyword.kwlist),

246

(r'^\s*(%s)\s\s' % '|'.join(keyword.kwlist),

246

"gratuitous whitespace after Python keyword"),

247

"gratuitous whitespace after Python keyword"),

247

(r'([$\[][ \t]\S)|(\S[ \t][$\]])', "gratuitous whitespace in () or []"),

248

(r'([$\[][ \t]\S)|(\S[ \t][$\]])', "gratuitous whitespace in () or []"),

248

# (r'\s\s=', "gratuitous whitespace before ="),

249

# (r'\s\s=', "gratuitous whitespace before ="),

249

(r'[^>< ](\+=|-=|!=|<>|<=|>=|<<=|>>=|%=)\S',

250

(r'[^>< ](\+=|-=|!=|<>|<=|>=|<<=|>>=|%=)\S',

250

"missing whitespace around operator"),

251

"missing whitespace around operator"),

251

(r'[^>< ](\+=|-=|!=|<>|<=|>=|<<=|>>=|%=)\s',

252

(r'[^>< ](\+=|-=|!=|<>|<=|>=|<<=|>>=|%=)\s',

252

"missing whitespace around operator"),

253

"missing whitespace around operator"),

253

(r'\s(\+=|-=|!=|<>|<=|>=|<<=|>>=|%=)\S',

254

(r'\s(\+=|-=|!=|<>|<=|>=|<<=|>>=|%=)\S',

254

"missing whitespace around operator"),

255

"missing whitespace around operator"),

255

(r'[^^+=*/!<>&| %-](\s=|=\s)[^= ]',

256

(r'[^^+=*/!<>&| %-](\s=|=\s)[^= ]',

256

"wrong whitespace around ="),

257

"wrong whitespace around ="),

257

(r'\([^()]*( =[^=]|[^<>!=]= )',

258

(r'\([^()]*( =[^=]|[^<>!=]= )',

258

"no whitespace around = for named parameters"),

259

"no whitespace around = for named parameters"),

259

(r'raise Exception', "don't raise generic exceptions"),

260

(r'raise Exception', "don't raise generic exceptions"),

260

(r'raise [^,(]+, ($[^$]+\)|[^,]+)$',

261

(r'raise [^,(]+, ($[^$]+\)|[^,]+)$',

261

"don't use old-style two-argument raise, use Exception(message)"),

262

"don't use old-style two-argument raise, use Exception(message)"),

262

(r' is\s+(not\s+)?["\'0-9-]', "object comparison with literal"),

263

(r' is\s+(not\s+)?["\'0-9-]', "object comparison with literal"),

263

(r' [=!]=\s+(True|False|None)',

264

(r' [=!]=\s+(True|False|None)',

264

"comparison with singleton, use 'is' or 'is not' instead"),

265

"comparison with singleton, use 'is' or 'is not' instead"),

265

(r'^\s*(while|if) [01]:',

266

(r'^\s*(while|if) [01]:',

266

"use True/False for constant Boolean expression"),

267

"use True/False for constant Boolean expression"),

267

(r'(?:(?<!def)\s+|\()hasattr',

268

(r'(?:(?<!def)\s+|\()hasattr',

268

'hasattr(foo, bar) is broken, use util.safehasattr(foo, bar) instead'),

269

'hasattr(foo, bar) is broken, use util.safehasattr(foo, bar) instead'),

269

(r'opener$[^)]*$.read\(',

270

(r'opener$[^)]*$.read\(',

270

"use opener.read() instead"),

271

"use opener.read() instead"),

271

(r'opener$[^)]*$.write\(',

272

(r'opener$[^)]*$.write\(',

272

"use opener.write() instead"),

273

"use opener.write() instead"),

273

(r'[\s$](open|file)\([^)]*$\.read\(',

274

(r'[\s$](open|file)\([^)]*$\.read\(',

274

"use util.readfile() instead"),

275

"use util.readfile() instead"),

275

(r'[\s$](open|file)\([^)]*$\.write\(',

276

(r'[\s$](open|file)\([^)]*$\.write\(',

276

"use util.writefile() instead"),

277

"use util.writefile() instead"),

277

(r'^[\s$]*(open(er)?|file)\([^)]*$',

278

(r'^[\s$]*(open(er)?|file)\([^)]*$',

278

"always assign an opened file to a variable, and close it afterwards"),

279

"always assign an opened file to a variable, and close it afterwards"),

279

(r'[\s$](open|file)\([^)]*$\.',

280

(r'[\s$](open|file)\([^)]*$\.',

280

"always assign an opened file to a variable, and close it afterwards"),

281

"always assign an opened file to a variable, and close it afterwards"),

281

(r'(?i)descend[e]nt', "the proper spelling is descendAnt"),

282

(r'(?i)descend[e]nt', "the proper spelling is descendAnt"),

282

(r'\.debug\(\_', "don't mark debug messages for translation"),

283

(r'\.debug\(\_', "don't mark debug messages for translation"),

283

(r'\.strip\.split', "no need to strip before splitting"),

284

(r'\.strip\.split', "no need to strip before splitting"),

284

(r'^\s*except\s*:', "naked except clause", r'#.*re-raises'),

285

(r'^\s*except\s*:', "naked except clause", r'#.*re-raises'),

285

(r'^\s*except\s([^$,]+|\([^$]+\))\s*,',

286

(r'^\s*except\s([^$,]+|\([^$]+\))\s*,',

286

'legacy exception syntax; use "as" instead of ","'),

287

'legacy exception syntax; use "as" instead of ","'),

287

(r':\n( )*( ){1,3}[^ ]', "must indent 4 spaces"),

288

(r':\n( )*( ){1,3}[^ ]', "must indent 4 spaces"),

288

(r'ui\.(status|progress|write|note|warn)\([\'\"]x',

289

(r'ui\.(status|progress|write|note|warn)\([\'\"]x',

289

"missing _() in ui message (use () to hide false-positives)"),

290

"missing _() in ui message (use () to hide false-positives)"),

290

(r'release$.*wlock, .*lock$', "wrong lock release order"),

291

(r'release$.*wlock, .*lock$', "wrong lock release order"),

291

(r'\b__bool__\b', "__bool__ should be __nonzero__ in Python 2"),

292

(r'\b__bool__\b', "__bool__ should be __nonzero__ in Python 2"),

292

(r'os\.path\.join$.*, *(""|\'\')$',

293

(r'os\.path\.join$.*, *(""|\'\')$',

293

"use pathutil.normasprefix(path) instead of os.path.join(path, '')"),

294

"use pathutil.normasprefix(path) instead of os.path.join(path, '')"),

294

(r'\s0[0-7]+\b', 'legacy octal syntax; use "0o" prefix instead of "0"'),

295

(r'\s0[0-7]+\b', 'legacy octal syntax; use "0o" prefix instead of "0"'),

295

# XXX only catch mutable arguments on the first line of the definition

296

# XXX only catch mutable arguments on the first line of the definition

296

(r'def.*[( ]\w+=\{\}', "don't use mutable default arguments"),

297

(r'def.*[( ]\w+=\{\}', "don't use mutable default arguments"),

297

(r'\butil\.Abort\b', "directly use error.Abort"),

298

(r'\butil\.Abort\b', "directly use error.Abort"),

298

],

299

],

299

# warnings

300

# warnings

300

[

301

[

301

(r'(^| )pp +xxxxqq[ \n][^\n]', "add two newlines after '.. note::'"),

302

(r'(^| )pp +xxxxqq[ \n][^\n]', "add two newlines after '.. note::'"),

302

]

303

]

303

]

304

]

304

305

pyfilters = [

306

pyfilters = [

306

(r"""(?msx)(?P<comment>\#.*?$)|

307

(r"""(?msx)(?P<comment>\#.*?$)|

307

((?P<quote>('''|\"\"\"|(?<!')'(?!')|(?<!")"(?!")))

308

((?P<quote>('''|\"\"\"|(?<!')'(?!')|(?<!")"(?!")))

308

(?P<text>(([^\\]|\\.)*?))

309

(?P<text>(([^\\]|\\.)*?))

309

(?P=quote))""", reppython),

310

(?P=quote))""", reppython),

310

]

311

]

311

312

txtfilters = []

313

txtfilters = []

313

314

txtpats = [

315

txtpats = [

315

[

316

[

316

('\s$', 'trailing whitespace'),

317

('\s$', 'trailing whitespace'),

317

('.. note::[ \n][^\n]', 'add two newlines after note::')

318

('.. note::[ \n][^\n]', 'add two newlines after note::')

318

],

319

],

319

[]

320

[]

320

]

321

]

321

322

cpats = [

323

cpats = [

323

[

324

[

324

(r'//', "don't use //-style comments"),

325

(r'//', "don't use //-style comments"),

325

(r'^ ', "don't use spaces to indent"),

326

(r'^ ', "don't use spaces to indent"),

326

(r'\S\t', "don't use tabs except for indent"),

327

(r'\S\t', "don't use tabs except for indent"),

327

(r'(\S[ \t]+|^[ \t]+)\n', "trailing whitespace"),

328

(r'(\S[ \t]+|^[ \t]+)\n', "trailing whitespace"),

328

(r'.{81}', "line too long"),

329

(r'.{81}', "line too long"),

329

(r'(while|if|do|for)\(', "use space after while/if/do/for"),

330

(r'(while|if|do|for)\(', "use space after while/if/do/for"),

330

(r'return\(', "return is not a function"),

331

(r'return\(', "return is not a function"),

331

(r' ;', "no space before ;"),

332

(r' ;', "no space before ;"),

332

(r'[^;] \)', "no space before )"),

333

(r'[^;] \)', "no space before )"),

333

(r'[)][{]', "space between ) and {"),

334

(r'[)][{]', "space between ) and {"),

334

(r'\w+\* \w+', "use int *foo, not int* foo"),

335

(r'\w+\* \w+', "use int *foo, not int* foo"),

335

(r'\W$[^$]+\) \w+', "use (int)foo, not (int) foo"),

336

(r'\W$[^$]+\) \w+', "use (int)foo, not (int) foo"),

336

(r'\w+ (\+\+|--)', "use foo++, not foo ++"),

337

(r'\w+ (\+\+|--)', "use foo++, not foo ++"),

337

(r'\w,\w', "missing whitespace after ,"),

338

(r'\w,\w', "missing whitespace after ,"),

338

(r'^[^#]\w[+/*]\w', "missing whitespace in expression"),

339

(r'^[^#]\w[+/*]\w', "missing whitespace in expression"),

339

(r'^#\s+\w', "use #foo, not # foo"),

340

(r'^#\s+\w', "use #foo, not # foo"),

340

(r'[^\n]\Z', "no trailing newline"),

341

(r'[^\n]\Z', "no trailing newline"),

341

(r'^\s*#import\b', "use only #include in standard C code"),

342

(r'^\s*#import\b', "use only #include in standard C code"),

342

],

343

],

343

# warnings

344

# warnings

344

[]

345

[]

345

]

346

]

346

347

cfilters = [

348

cfilters = [

348

(r'(/\*)(((\*(?!/))|[^*])*)\*/', repccomment),

349

(r'(/\*)(((\*(?!/))|[^*])*)\*/', repccomment),

349

(r'''(?P<quote>(?<!")")(?P<text>([^"]|\\")+)"(?!")''', repquote),

350

(r'''(?P<quote>(?<!")")(?P<text>([^"]|\\")+)"(?!")''', repquote),

350

(r'''(#\s*include\s+<)([^>]+)>''', repinclude),

351

(r'''(#\s*include\s+<)([^>]+)>''', repinclude),

351

(r'($)([^)]+$)', repcallspaces),

352

(r'($)([^)]+$)', repcallspaces),

352

]

353

]

353

354

inutilpats = [

355

inutilpats = [

355

[

356

[

356

(r'\bui\.', "don't use ui in util"),

357

(r'\bui\.', "don't use ui in util"),

357

],

358

],

358

# warnings

359

# warnings

359

[]

360

[]

360

]

361

]

361

362

inrevlogpats = [

363

inrevlogpats = [

363

[

364

[

364

(r'\brepo\.', "don't use repo in revlog"),

365

(r'\brepo\.', "don't use repo in revlog"),

365

],

366

],

366

# warnings

367

# warnings

367

[]

368

[]

368

]

369

]

369

370

webtemplatefilters = []

371

webtemplatefilters = []

371

372

webtemplatepats = [

373

webtemplatepats = [

373

[],

374

[],

374

[

375

[

375

(r'{desc(\|(?!websub|firstline)[^\|]*)+}',

376

(r'{desc(\|(?!websub|firstline)[^\|]*)+}',

376

'follow desc keyword with either firstline or websub'),

377

'follow desc keyword with either firstline or websub'),

377

]

378

]

378

]

379

]

379

380

checks = [

381

checks = [

381

('python', r'.*\.(py|cgi)$', r'^#!.*python', pyfilters, pypats),

382

('python', r'.*\.(py|cgi)$', r'^#!.*python', pyfilters, pypats),

382

('test script', r'(.*/)?test-[^.~]*$', '', testfilters, testpats),

383

('test script', r'(.*/)?test-[^.~]*$', '', testfilters, testpats),

383

('c', r'.*\.[ch]$', '', cfilters, cpats),

384

('c', r'.*\.[ch]$', '', cfilters, cpats),

384

('unified test', r'.*\.t$', '', utestfilters, utestpats),

385

('unified test', r'.*\.t$', '', utestfilters, utestpats),

385

('layering violation repo in revlog', r'mercurial/revlog\.py', '',

386

('layering violation repo in revlog', r'mercurial/revlog\.py', '',

386

pyfilters, inrevlogpats),

387

pyfilters, inrevlogpats),

387

('layering violation ui in util', r'mercurial/util\.py', '', pyfilters,

388

('layering violation ui in util', r'mercurial/util\.py', '', pyfilters,

388

inutilpats),

389

inutilpats),

389

('txt', r'.*\.txt$', '', txtfilters, txtpats),

390

('txt', r'.*\.txt$', '', txtfilters, txtpats),

390

('web template', r'mercurial/templates/.*\.tmpl', '',

391

('web template', r'mercurial/templates/.*\.tmpl', '',

391

webtemplatefilters, webtemplatepats),

392

webtemplatefilters, webtemplatepats),

392

]

393

]

393

394

def _preparepats():

395

def _preparepats():

395

for c in checks:

396

for c in checks:

396

failandwarn = c[-1]

397

failandwarn = c[-1]

397

for pats in failandwarn:

398

for pats in failandwarn:

398

for i, pseq in enumerate(pats):

399

for i, pseq in enumerate(pats):

399

# fix-up regexes for multi-line searches

400

# fix-up regexes for multi-line searches

400

p = pseq[0]

401

p = pseq[0]

401

# \s doesn't match \n

402

# \s doesn't match \n

402

p = re.sub(r'(?<!\\)\\s', r'[ \\t]', p)

403

p = re.sub(r'(?<!\\)\\s', r'[ \\t]', p)

403

# [^...] doesn't match newline

404

# [^...] doesn't match newline

404

p = re.sub(r'(?<!\\)\[\^', r'[^\\n', p)

405

p = re.sub(r'(?<!\\)\[\^', r'[^\\n', p)

405

406

pats[i] = (re.compile(p, re.MULTILINE),) + pseq[1:]

407

pats[i] = (re.compile(p, re.MULTILINE),) + pseq[1:]

407

filters = c[3]

408

filters = c[3]

408

for i, flt in enumerate(filters):

409

for i, flt in enumerate(filters):

409

filters[i] = re.compile(flt[0]), flt[1]

410

filters[i] = re.compile(flt[0]), flt[1]

410

_preparepats()

411

_preparepats()

411

412

class norepeatlogger(object):

413

class norepeatlogger(object):

413

def __init__(self):

414

def __init__(self):

414

self._lastseen = None

415

self._lastseen = None

415

416

def log(self, fname, lineno, line, msg, blame):

417

def log(self, fname, lineno, line, msg, blame):

417

"""print error related a to given line of a given file.

418

"""print error related a to given line of a given file.

418

419

The faulty line will also be printed but only once in the case

420

The faulty line will also be printed but only once in the case

420

of multiple errors.

421

of multiple errors.

421

422

:fname: filename

423

:fname: filename

423

:lineno: line number

424

:lineno: line number

424

:line: actual content of the line

425

:line: actual content of the line

425

:msg: error message

426

:msg: error message

426

"""

427

"""

427

msgid = fname, lineno, line

428

msgid = fname, lineno, line

428

if msgid != self._lastseen:

429

if msgid != self._lastseen:

429

if blame:

430

if blame:

430

print "%s:%d (%s):" % (fname, lineno, blame)

431

print "%s:%d (%s):" % (fname, lineno, blame)

431

else:

432

else:

432

print "%s:%d:" % (fname, lineno)

433

print "%s:%d:" % (fname, lineno)

433

print " > %s" % line

434

print " > %s" % line

434

self._lastseen = msgid

435

self._lastseen = msgid

435

print " " + msg

436

print " " + msg

436

437

_defaultlogger = norepeatlogger()

438

_defaultlogger = norepeatlogger()

438

439

def getblame(f):

440

def getblame(f):

440

lines = []

441

lines = []

441

for l in os.popen('hg annotate -un %s' % f):

442

for l in os.popen('hg annotate -un %s' % f):

442

start, line = l.split(':', 1)

443

start, line = l.split(':', 1)

443

user, rev = start.split()

444

user, rev = start.split()

444

lines.append((line[1:-1], user, rev))

445

lines.append((line[1:-1], user, rev))

445

return lines

446

return lines

446

447

def checkfile(f, logfunc=_defaultlogger.log, maxerr=None, warnings=False,

448

def checkfile(f, logfunc=_defaultlogger.log, maxerr=None, warnings=False,

448

blame=False, debug=False, lineno=True):

449

blame=False, debug=False, lineno=True):

449

"""checks style and portability of a given file

450

"""checks style and portability of a given file

450

451

:f: filepath

452

:f: filepath

452

:logfunc: function used to report error

453

:logfunc: function used to report error

453

logfunc(filename, linenumber, linecontent, errormessage)

454

logfunc(filename, linenumber, linecontent, errormessage)

454

:maxerr: number of error to display before aborting.

455

:maxerr: number of error to display before aborting.

455

Set to false (default) to report all errors

456

Set to false (default) to report all errors

456

457

return True if no error is found, False otherwise.

458

return True if no error is found, False otherwise.

458

"""

459

"""

459

blamecache = None

460

blamecache = None

460

result = True

461

result = True

461

462

try:

463

try:

463

fp = open(f)

464

fp = open(f)

464

except IOError as e:

465

except IOError as e:

465

print "Skipping %s, %s" % (f, str(e).split(':', 1)[0])

466

print "Skipping %s, %s" % (f, str(e).split(':', 1)[0])

466

return result

467

return result

467

pre = post = fp.read()

468

pre = post = fp.read()

468

fp.close()

469

fp.close()

469

470

for name, match, magic, filters, pats in checks:

471

for name, match, magic, filters, pats in checks:

471

if debug:

472

if debug:

472

print name, f

473

print name, f

473

fc = 0

474

fc = 0

474

if not (re.match(match, f) or (magic and re.search(magic, f))):

475

if not (re.match(match, f) or (magic and re.search(magic, f))):

475

if debug:

476

if debug:

476

print "Skipping %s for %s it doesn't match %s" % (

477

print "Skipping %s for %s it doesn't match %s" % (

477

name, match, f)

478

name, match, f)

478

continue

479

continue

479

if "no-" "check-code" in pre:

480

if "no-" "check-code" in pre:

480

print "Skipping %s it has no-" "check-code" % f

481

print "Skipping %s it has no-" "check-code" % f

481

return "Skip" # skip checking this file

482

return "Skip" # skip checking this file

482

for p, r in filters:

483

for p, r in filters:

483

post = re.sub(p, r, post)

484

post = re.sub(p, r, post)

484

nerrs = len(pats[0]) # nerr elements are errors

485

nerrs = len(pats[0]) # nerr elements are errors

485

if warnings:

486

if warnings:

486

pats = pats[0] + pats[1]

487

pats = pats[0] + pats[1]

487

else:

488

else:

488

pats = pats[0]

489

pats = pats[0]

489

# print post # uncomment to show filtered version

490

# print post # uncomment to show filtered version

490

491

if debug:

492

if debug:

492

print "Checking %s for %s" % (name, f)

493

print "Checking %s for %s" % (name, f)

493

494

prelines = None

495

prelines = None

495

errors = []

496

errors = []

496

for i, pat in enumerate(pats):

497

for i, pat in enumerate(pats):

497

if len(pat) == 3:

498

if len(pat) == 3:

498

p, msg, ignore = pat

499

p, msg, ignore = pat

499

else:

500

else:

500

p, msg = pat

501

p, msg = pat

501

ignore = None

502

ignore = None

502

if i >= nerrs:

503

if i >= nerrs:

503

msg = "warning: " + msg

504

msg = "warning: " + msg

504

505

pos = 0

506

pos = 0

506

n = 0

507

n = 0

507

for m in p.finditer(post):

508

for m in p.finditer(post):

508

if prelines is None:

509

if prelines is None:

509

prelines = pre.splitlines()

510

prelines = pre.splitlines()

510

postlines = post.splitlines(True)

511

postlines = post.splitlines(True)

511

512

start = m.start()

513

start = m.start()

513

while n < len(postlines):

514

while n < len(postlines):

514

step = len(postlines[n])

515

step = len(postlines[n])

515

if pos + step > start:

516

if pos + step > start:

516

break

517

break

517

pos += step

518

pos += step

518

n += 1

519

n += 1

519

l = prelines[n]

520

l = prelines[n]

520

521

if ignore and re.search(ignore, l, re.MULTILINE):

522

if ignore and re.search(ignore, l, re.MULTILINE):

522

if debug:

523

if debug:

523

print "Skipping %s for %s:%s (ignore pattern)" % (

524

print "Skipping %s for %s:%s (ignore pattern)" % (

524

name, f, n)

525

name, f, n)

525

continue

526

continue

526

bd = ""

527

bd = ""

527

if blame:

528

if blame:

528

bd = 'working directory'

529

bd = 'working directory'

529

if not blamecache:

530

if not blamecache:

530

blamecache = getblame(f)

531

blamecache = getblame(f)

531

if n < len(blamecache):

532

if n < len(blamecache):

532

bl, bu, br = blamecache[n]

533

bl, bu, br = blamecache[n]

533

if bl == l:

534

if bl == l:

534

bd = '%s@%s' % (bu, br)

535

bd = '%s@%s' % (bu, br)

535

536

errors.append((f, lineno and n + 1, l, msg, bd))

537

errors.append((f, lineno and n + 1, l, msg, bd))

537

result = False

538

result = False

538

539

errors.sort()

540

errors.sort()

540

for e in errors:

541

for e in errors:

541

logfunc(*e)

542

logfunc(*e)

542

fc += 1

543

fc += 1

543

if maxerr and fc >= maxerr:

544

if maxerr and fc >= maxerr:

544

print " (too many errors, giving up)"

545

print " (too many errors, giving up)"

545

break

546

break

546

547

return result

548

return result

548

549

if __name__ == "__main__":

550

if __name__ == "__main__":

550

parser = optparse.OptionParser("%prog [options] [files]")

551

parser = optparse.OptionParser("%prog [options] [files]")

551

parser.add_option("-w", "--warnings", action="store_true",

552

parser.add_option("-w", "--warnings", action="store_true",

552

help="include warning-level checks")

553

help="include warning-level checks")

553

parser.add_option("-p", "--per-file", type="int",

554

parser.add_option("-p", "--per-file", type="int",

554

help="max warnings per file")

555

help="max warnings per file")

555

parser.add_option("-b", "--blame", action="store_true",

556

parser.add_option("-b", "--blame", action="store_true",

556

help="use annotate to generate blame info")

557

help="use annotate to generate blame info")

557

parser.add_option("", "--debug", action="store_true",

558

parser.add_option("", "--debug", action="store_true",

558

help="show debug information")

559

help="show debug information")

559

parser.add_option("", "--nolineno", action="store_false",

560

parser.add_option("", "--nolineno", action="store_false",

560

dest='lineno', help="don't show line numbers")

561

dest='lineno', help="don't show line numbers")

561

562

parser.set_defaults(per_file=15, warnings=False, blame=False, debug=False,

563

parser.set_defaults(per_file=15, warnings=False, blame=False, debug=False,

563

lineno=True)

564

lineno=True)

564

(options, args) = parser.parse_args()

565

(options, args) = parser.parse_args()

565

566

if len(args) == 0:

567

if len(args) == 0:

567

check = glob.glob("*")

568

check = glob.glob("*")

568

else:

569

else:

569

check = args

570

check = args

570

571

ret = 0

572

ret = 0

572

for f in check:

573

for f in check:

573

if not checkfile(f, maxerr=options.per_file, warnings=options.warnings,

574

if not checkfile(f, maxerr=options.per_file, warnings=options.warnings,

574

blame=options.blame, debug=options.debug,

575

blame=options.blame, debug=options.debug,

575

lineno=options.lineno):

576

lineno=options.lineno):

576

ret = 1

577

ret = 1

577

sys.exit(ret)

578

sys.exit(ret)

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             #!/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.
             """style and portability checker for Mercurial
             when a rule triggers wrong, do one of the following (prefer one from top):
              * do the work-around the rule suggests
              * doublecheck that it is a false match
              * improve the rule pattern
              * add an ignore pattern to the rule (3rd arg) which matches your good line
                (you can append a short comment and match this, like: #re-raises, # no-py24)
              * change the pattern to a warning and list the exception in test-check-code-hg
              * ONLY use no--check-code for skipping entire files from external sources
             """
             import re, glob, os, sys
             import keyword
             import optparse
             try:
                 import re2
             except ImportError:
                 re2 = None
             def compilere(pat, multiline=False):
                 if multiline:
                     pat = '(?m)' + pat
                 if re2:
                     try:
                         return re2.compile(pat)
                     except re2.error:
                         pass
                 return re.compile(pat)
             def repquote(m):
                 fromc = '.:'
                 tochr = 'pq'
                 def encodechr(i):
                     if i > 255:
                         return 'u'
                     c = chr(i)
                     if c in ' \n':
                         return c
                     if c.isalpha():
                         return 'x'
                     if c.isdigit():
                         return 'n'
                     try:
                         return tochr[fromc.find(c)]
                     except (ValueError, IndexError):
                         return 'o'
                 t = m.group('text')
                 tt = ''.join(encodechr(i) for i in xrange(256))
                 t = t.translate(tt)
                 return m.group('quote') + t + m.group('quote')
             def reppython(m):
                 comment = m.group('comment')
                 if comment:
                     l = len(comment.rstrip())
                     return "#" * l + comment[l:]
                 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\$?\(\([^\)\n]*\)\)', "don't use (()) or $(()), use 'expr'"),
                 (r'grep.*-q', "don't use 'grep -q', redirect to /dev/null"),
                 (r'(?<!hg )grep.*-a', "don't use 'grep -a', use in-line python"),
                 (r'sed.*-i', "don't use 'sed -i', use a temporary file"),
                 (r'\becho\b.*\\n', "don't use 'echo \\n', use printf"),
                 (r'echo -n', "don't use 'echo -n', use printf"),
                 (r'(^|\|\s*)\bwc\b[^|]*$\n(?!.*\(re\))', "filter wc output"),
                 (r'head -c', "don't use 'head -c', use 'dd'"),
                 (r'tail -n', "don't use the '-n' option to tail, just use '-<num>'"),
                 (r'sha1sum', "don't use sha1sum, use $TESTDIR/md5sum.py"),
                 (r'ls.*-\w*R', "don't use 'ls -R', use 'find'"),
                 (r'printf.*[^\\]\\([1-9]|0\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'[^\n]\Z', "no trailing newline"),
                 (r'export.*=', "don't export and assign at once"),
                 (r'^source\b', "don't use 'source', use '.'"),
                 (r'touch -d', "don't use 'touch -d', use 'touch -t' instead"),
                 (r'ls +[^|\n-]+ +-', "options to 'ls' must come before filenames"),
                 (r'[^>\n]>\s*\$HGRCPATH', "don't overwrite $HGRCPATH, append to it"),
                 (r'^stop\(\)', "don't use 'stop' as a shell function name"),
                 (r'(\[|\btest\b).*-e ', "don't use 'test -e', use 'test -f'"),
                 (r'\[\[\s+[^\]]*\]\]', "don't use '[[ ]]', use '[ ]'"),
                 (r'^alias\b.*=', "don't use alias, use a function"),
                 (r'if\s*!', "don't use '!' to negate exit status"),
                 (r'/dev/u?random', "don't use entropy, use /dev/zero"),
                 (r'do\s*true;\s*done', "don't use true as loop body, use sleep 0"),
                 (r'^( *)\t', "don't use tabs to indent"),
                 (r'sed (-e )?\'(\d+|/[^/]*/)i(?!\\\n)',
                  "put a backslash-escaped newline after sed 'i' command"),
                 (r'^diff *-\w*u.*$\n(^  \$ |^$)', "prefix diff -u with cmp"),
                 (r'seq ', "don't use 'seq', use $TESTDIR/seq.py"),
                 (r'\butil\.Abort\b', "directly use error.Abort"),
+                (r'\|&', "don't use |&, use 2>&1"),
               ],
               # warnings
               [
                 (r'^function', "don't use 'function', use old style"),
                 (r'^diff.*-\w*N', "don't use 'diff -N'"),
                 (r'\$PWD|\${PWD}', "don't use $PWD, use `pwd`"),
                 (r'^([^"\'\n]|("[^"\n]*")|(\'[^\'\n]*\'))*\^', "^ must be quoted"),
                 (r'kill (`|\$\()', "don't use kill, use killdaemons.py")
               ]
             ]
             testfilters = [
                 (r"( *)(#([^\n]*\S)?)", repcomment),
                 (r"<<(\S+)((.|\n)*?\n\1)", rephere),
             ]
             winglobmsg = "use (glob) to match Windows paths too"
             uprefix = r"^  \$ "
             utestpats = [
               [
                 (r'^(\S.*||  [$>] .*)[ \t]\n', "trailing whitespace on non-output"),
                 (uprefix + r'.*\|\s*sed[^|>\n]*\n',
                  "use regex test output patterns instead of sed"),
                 (uprefix + r'(true|exit 0)', "explicit zero exit unnecessary"),
                 (uprefix + r'.*(?<!\[)\$\?', "explicit exit code checks unnecessary"),
                 (uprefix + r'.*\|\| echo.*(fail|error)',
                  "explicit exit code checks unnecessary"),
                 (uprefix + r'set -e', "don't use set -e"),
                 (uprefix + r'(\s|fi\b|done\b)', "use > for continued lines"),
                 (uprefix + r'.*:\.\S*/', "x:.y in a path does not work on msys, rewrite "
                  "as x://.y, or see `hg log -k msys` for alternatives", r'-\S+:\.|' #-Rxxx
                  '# no-msys'), # in test-pull.t which is skipped on windows
                 (r'^  saved backup bundle to \$TESTTMP.*\.hg$', winglobmsg),
                 (r'^  changeset .* references (corrupted|missing) \$TESTTMP/.*[^)]$',
                  winglobmsg),
                 (r'^  pulling from \$TESTTMP/.*[^)]$', winglobmsg,
                  '\$TESTTMP/unix-repo$'), # in test-issue1802.t which skipped on windows
                 (r'^  reverting (?!subrepo ).*/.*[^)]$', winglobmsg),
                 (r'^  cloning subrepo \S+/.*[^)]$', winglobmsg),
                 (r'^  pushing to \$TESTTMP/.*[^)]$', winglobmsg),
                 (r'^  pushing subrepo \S+/\S+ to.*[^)]$', winglobmsg),
                 (r'^  moving \S+/.*[^)]$', winglobmsg),
                 (r'^  no changes made to subrepo since.*/.*[^)]$', winglobmsg),
                 (r'^  .*: largefile \S+ not available from file:.*/.*[^)]$', winglobmsg),
                 (r'^  .*file://\$TESTTMP',
                  'write "file:/*/$TESTTMP" + (glob) to match on windows too'),
                 (r'^  (cat|find): .*: No such file or directory',
                  'use test -f to test for file existence'),
               ],
               # warnings
               [
                 (r'^  [^*?/\n]* \(glob\)$',
                  "glob match with no glob character (?*/)"),
               ]
             ]
             for i in [0, 1]:
                 for tp in testpats[i]:
                     p = tp[0]
                     m = tp[1]
                     if p.startswith(r'^'):
                         p = r"^  [$>] (%s)" % p[1:]
                     else:
                         p = r"^  [$>] .*(%s)" % p
                     utestpats[i].append((p, m) + tp[2:])
             utestfilters = [
                 (r"<<(\S+)((.|\n)*?\n  > \1)", rephere),
                 (r"( *)(#([^\n]*\S)?)", repcomment),
             ]
             pypats = [
               [
                 (r'\([^)]*\*\w[^()]+\w+=', "can't pass varargs with keyword in Py2.5"),
                 (r'^\s*def\s*\w+\s*\(.*,\s*\(',
                  "tuple parameter unpacking not available in Python 3+"),
                 (r'lambda\s*\(.*,.*\)',
                  "tuple parameter unpacking not available in Python 3+"),
                 (r'import (.+,[^.]+\.[^.]+|[^.]+\.[^.]+,)',
                  '2to3 can\'t always rewrite "import qux, foo.bar", '
                  'use "import foo.bar" on its own line instead.'),
                 (r'(?<!def)\s+(cmp)\(', "cmp is not available in Python 3+"),
                 (r'\breduce\s*\(.*', "reduce is not available in Python 3+"),
                 (r'dict\(.*=', 'dict() is different in Py2 and 3 and is slower than {}',
                  'dict-from-generator'),
                 (r'\.has_key\b', "dict.has_key is not available in Python 3+"),
                 (r'\s<>\s', '<> operator is not available in Python 3+, use !='),
                 (r'^\s*\t', "don't use tabs"),
                 (r'\S;\s*\n', "semicolon"),
                 (r'[^_]_\([ \t\n]*(?:"[^"]+"[ \t\n+]*)+%', "don't use % inside _()"),
                 (r"[^_]_\([ \t\n]*(?:'[^']+'[ \t\n+]*)+%", "don't use % inside _()"),
                 (r'(\w|\)),\w', "missing whitespace after ,"),
                 (r'(\w|\))[+/*\-<>]\w', "missing whitespace in expression"),
                 (r'^\s+(\w|\.)+=\w[^,()\n]*$', "missing whitespace in assignment"),
                 (r'.{81}', "line too long"),
                 (r' x+[xo][\'"]\n\s+[\'"]x', 'string join across lines with no space'),
                 (r'[^\n]\Z', "no trailing newline"),
                 (r'(\S[ \t]+|^[ \t]+)\n', "trailing whitespace"),
             #    (r'^\s+[^_ \n][^_. \n]+_[^_\n]+\s*=',
             #     "don't use underbars in identifiers"),
                 (r'^\s+(self\.)?[A-za-z][a-z0-9]+[A-Z]\w* = ',
                  "don't use camelcase in identifiers"),
                 (r'^\s*(if|while|def|class|except|try)\s[^[\n]*:\s*[^\\n]#\s]+',
                  "linebreak after :"),
                 (r'class\s[^( \n]+:', "old-style class, use class foo(object)"),
                 (r'class\s[^( \n]+\(\):',
                  "class foo() creates old style object, use class foo(object)"),
                 (r'\b(%s)\(' % '|'.join(k for k in keyword.kwlist
                                         if k not in ('print', 'exec')),
                  "Python keyword is not 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() has no bytes counterpart, use %"),
                 (r'^\s*(%s)\s\s' % '|'.join(keyword.kwlist),
                  "gratuitous whitespace after Python keyword"),
                 (r'([\(\[][ \t]\S)|(\S[ \t][\)\]])', "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'\([^()]*( =[^=]|[^<>!=]= )',
                  "no whitespace around = for named parameters"),
                 (r'raise Exception', "don't raise generic exceptions"),
                 (r'raise [^,(]+, (\([^\)]+\)|[^,\(\)]+)$',
                  "don't use old-style two-argument raise, use Exception(message)"),
                 (r' is\s+(not\s+)?["\'0-9-]', "object comparison with literal"),
                 (r' [=!]=\s+(True|False|None)',
                  "comparison with singleton, use 'is' or 'is not' instead"),
                 (r'^\s*(while|if) [01]:',
                  "use True/False for constant Boolean expression"),
                 (r'(?:(?<!def)\s+|\()hasattr',
                  'hasattr(foo, bar) is broken, use util.safehasattr(foo, bar) instead'),
                 (r'opener\([^)]*\).read\(',
                  "use opener.read() instead"),
                 (r'opener\([^)]*\).write\(',
                  "use opener.write() instead"),
                 (r'[\s\(](open|file)\([^)]*\)\.read\(',
                  "use util.readfile() instead"),
                 (r'[\s\(](open|file)\([^)]*\)\.write\(',
                  "use util.writefile() instead"),
                 (r'^[\s\(]*(open(er)?|file)\([^)]*\)',
                  "always assign an opened file to a variable, and close it afterwards"),
                 (r'[\s\(](open|file)\([^)]*\)\.',
                  "always assign an opened file to a variable, and close it afterwards"),
                 (r'(?i)descend[e]nt', "the proper spelling is descendAnt"),
                 (r'\.debug\(\_', "don't mark debug messages for translation"),
                 (r'\.strip\(\)\.split\(\)', "no need to strip before splitting"),
                 (r'^\s*except\s*:', "naked except clause", r'#.*re-raises'),
                 (r'^\s*except\s([^\(,]+|\([^\)]+\))\s*,',
                  'legacy exception syntax; use "as" instead of ","'),
                 (r':\n(    )*( ){1,3}[^ ]', "must indent 4 spaces"),
                 (r'ui\.(status|progress|write|note|warn)\([\'\"]x',
                  "missing _() in ui message (use () to hide false-positives)"),
                 (r'release\(.*wlock, .*lock\)', "wrong lock release order"),
                 (r'\b__bool__\b', "__bool__ should be __nonzero__ in Python 2"),
                 (r'os\.path\.join\(.*, *(""|\'\')\)',
                  "use pathutil.normasprefix(path) instead of os.path.join(path, '')"),
                 (r'\s0[0-7]+\b', 'legacy octal syntax; use "0o" prefix instead of "0"'),
                 # XXX only catch mutable arguments on the first line of the definition
                 (r'def.*[( ]\w+=\{\}', "don't use mutable default arguments"),
                 (r'\butil\.Abort\b', "directly use error.Abort"),
               ],
               # warnings
               [
                 (r'(^| )pp +xxxxqq[ \n][^\n]', "add two newlines after '.. note::'"),
               ]
             ]
             pyfilters = [
                 (r"""(?msx)(?P<comment>\#.*?$)|
                      ((?P<quote>('''|\"\"\"|(?<!')'(?!')|(?<!")"(?!")))
                       (?P<text>(([^\\]|\\.)*?))
                       (?P=quote))""", reppython),
             ]
             txtfilters = []
             txtpats = [
               [
                 ('\s$', 'trailing whitespace'),
                 ('.. note::[ \n][^\n]', 'add two newlines after note::')
               ],
               []
             ]
             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[ \t]+|^[ \t]+)\n', "trailing whitespace"),
                 (r'.{81}', "line too long"),
                 (r'(while|if|do|for)\(', "use space after while/if/do/for"),
                 (r'return\(', "return is not a function"),
                 (r' ;', "no space before ;"),
                 (r'[^;] \)', "no space before )"),
                 (r'[)][{]', "space between ) and {"),
                 (r'\w+\* \w+', "use int *foo, not int* foo"),
                 (r'\W\([^\)]+\) \w+', "use (int)foo, not (int) foo"),
                 (r'\w+ (\+\+|--)', "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"),
                 (r'^\s*#import\b', "use only #include in standard C code"),
               ],
               # warnings
               []
             ]
             cfilters = [
                 (r'(/\*)(((\*(?!/))|[^*])*)\*/', repccomment),
                 (r'''(?P<quote>(?<!")")(?P<text>([^"]|\\")+)"(?!")''', repquote),
                 (r'''(#\s*include\s+<)([^>]+)>''', repinclude),
                 (r'(\()([^)]+\))', repcallspaces),
             ]
             inutilpats = [
               [
                 (r'\bui\.', "don't use ui in util"),
               ],
               # warnings
               []
             ]
             inrevlogpats = [
               [
                 (r'\brepo\.', "don't use repo in revlog"),
               ],
               # warnings
               []
             ]
             webtemplatefilters = []
             webtemplatepats = [
               [],
               [
                 (r'{desc(\|(?!websub|firstline)[^\|]*)+}',
                  'follow desc keyword with either firstline or websub'),
               ]
             ]
             checks = [
                 ('python', r'.*\.(py|cgi)$', r'^#!.*python', pyfilters, pypats),
                 ('test script', r'(.*/)?test-[^.~]*$', '', testfilters, testpats),
                 ('c', r'.*\.[ch]$', '', cfilters, cpats),
                 ('unified test', r'.*\.t$', '', utestfilters, utestpats),
                 ('layering violation repo in revlog', r'mercurial/revlog\.py', '',
                  pyfilters, inrevlogpats),
                 ('layering violation ui in util', r'mercurial/util\.py', '', pyfilters,
                  inutilpats),
                 ('txt', r'.*\.txt$', '', txtfilters, txtpats),
                 ('web template', r'mercurial/templates/.*\.tmpl', '',
                  webtemplatefilters, webtemplatepats),
             ]
             def _preparepats():
                 for c in checks:
                     failandwarn = c[-1]
                     for pats in failandwarn:
                         for i, pseq in enumerate(pats):
                             # fix-up regexes for multi-line searches
                             p = pseq[0]
                             # \s doesn't match \n
                             p = re.sub(r'(?<!\\)\\s', r'[ \\t]', p)
                             # [^...] doesn't match newline
                             p = re.sub(r'(?<!\\)\[\^', r'[^\\n', p)
                             pats[i] = (re.compile(p, re.MULTILINE),) + pseq[1:]
                     filters = c[3]
                     for i, flt in enumerate(filters):
                         filters[i] = re.compile(flt[0]), flt[1]
             _preparepats()
             class norepeatlogger(object):
                 def __init__(self):
                     self._lastseen = None
                 def log(self, fname, lineno, line, msg, blame):
                     """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:
                         if blame:
                             print "%s:%d (%s):" % (fname, lineno, blame)
                         else:
                             print "%s:%d:" % (fname, lineno)
                         print " > %s" % line
                         self._lastseen = msgid
                     print " " + msg
             _defaultlogger = norepeatlogger()
             def getblame(f):
                 lines = []
                 for l in os.popen('hg annotate -un %s' % f):
                     start, line = l.split(':', 1)
                     user, rev = start.split()
                     lines.append((line[1:-1], user, rev))
                 return lines
             def checkfile(f, logfunc=_defaultlogger.log, maxerr=None, warnings=False,
                           blame=False, debug=False, lineno=True):
                 """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 aborting.
                          Set to false (default) to report all errors
                 return True if no error is found, False otherwise.
                 """
                 blamecache = None
                 result = True
                 try:
                     fp = open(f)
                 except IOError as e:
                     print "Skipping %s, %s" % (f, str(e).split(':', 1)[0])
                     return result
                 pre = post = fp.read()
                 fp.close()
                 for name, match, magic, filters, pats in checks:
                     if debug:
                         print name, f
                     fc = 0
                     if not (re.match(match, f) or (magic and re.search(magic, f))):
                         if debug:
                             print "Skipping %s for %s it doesn't match %s" % (
                                    name, match, f)
                         continue
                     if "no-" "check-code" in pre:
                         print "Skipping %s it has no-" "check-code" % f
                         return "Skip" # skip checking this file
                     for p, r in filters:
                         post = re.sub(p, r, post)
                     nerrs = len(pats[0]) # nerr elements are errors
                     if warnings:
                         pats = pats[0] + pats[1]
                     else:
                         pats = pats[0]
                     # print post # uncomment to show filtered version
                     if debug:
                         print "Checking %s for %s" % (name, f)
                     prelines = None
                     errors = []
                     for i, pat in enumerate(pats):
                         if len(pat) == 3:
                             p, msg, ignore = pat
                         else:
                             p, msg = pat
                             ignore = None
                         if i >= nerrs:
                             msg = "warning: " + msg
                         pos = 0
                         n = 0
                         for m in p.finditer(post):
                             if prelines is None:
                                 prelines = pre.splitlines()
                                 postlines = post.splitlines(True)
                             start = m.start()
                             while n < len(postlines):
                                 step = len(postlines[n])
                                 if pos + step > start:
                                     break
                                 pos += step
                                 n += 1
                             l = prelines[n]
                             if ignore and re.search(ignore, l, re.MULTILINE):
                                 if debug:
                                     print "Skipping %s for %s:%s (ignore pattern)" % (
                                         name, f, n)
                                 continue
                             bd = ""
                             if blame:
                                 bd = 'working directory'
                                 if not blamecache:
                                     blamecache = getblame(f)
                                 if n < len(blamecache):
                                     bl, bu, br = blamecache[n]
                                     if bl == l:
                                         bd = '%s@%s' % (bu, br)
                             errors.append((f, lineno and n + 1, l, msg, bd))
                             result = False
                     errors.sort()
                     for e in errors:
                         logfunc(*e)
                         fc += 1
                         if maxerr and fc >= maxerr:
                             print " (too many errors, giving up)"
                             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.add_option("-b", "--blame", action="store_true",
                                   help="use annotate to generate blame info")
                 parser.add_option("", "--debug", action="store_true",
                                   help="show debug information")
                 parser.add_option("", "--nolineno", action="store_false",
                                   dest='lineno', help="don't show line numbers")
                 parser.set_defaults(per_file=15, warnings=False, blame=False, debug=False,
                                     lineno=True)
                 (options, args) = parser.parse_args()
                 if len(args) == 0:
                     check = glob.glob("*")
                 else:
                     check = args
                 ret = 0
                 for f in check:
                     if not checkfile(f, maxerr=options.per_file, warnings=options.warnings,
                                      blame=options.blame, debug=options.debug,
                                      lineno=options.lineno):
                         ret = 1
                 sys.exit(ret)