gem5/util/style.py
Steve Reinhardt 2728f7bd81 util: added line length and boolean comparison style checkers
Added checkers for line length and boolean comparisons
(== true/== false) to the style script.
2016-02-06 17:21:20 -08:00

784 lines
25 KiB
Python

#! /usr/bin/env python
# Copyright (c) 2014 ARM Limited
# All rights reserved
#
# The license below extends only to copyright in the software and shall
# not be construed as granting a license to any other intellectual
# property including but not limited to intellectual property relating
# to a hardware implementation of the functionality of the software
# licensed hereunder. You may use the software subject to the license
# terms below provided that you ensure that this notice is replicated
# unmodified and in its entirety in all distributions of the software,
# modified or unmodified, in source code or in binary form.
#
# Copyright (c) 2006 The Regents of The University of Michigan
# Copyright (c) 2007,2011 The Hewlett-Packard Development Company
# Copyright (c) 2016 Advanced Micro Devices, Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Nathan Binkert
# Steve Reinhardt
import heapq
import os
import re
import sys
from os.path import dirname, join as joinpath
from itertools import count
from mercurial import bdiff, mdiff, commands
current_dir = dirname(__file__)
sys.path.insert(0, current_dir)
sys.path.insert(1, joinpath(dirname(current_dir), 'src', 'python'))
from m5.util import neg_inf, pos_inf, Region, Regions
import sort_includes
from file_types import lang_type
all_regions = Regions(Region(neg_inf, pos_inf))
tabsize = 8
lead = re.compile(r'^([ \t]+)')
trail = re.compile(r'([ \t]+)$')
any_control = re.compile(r'\b(if|while|for)([ \t]*)\(')
format_types = set(('C', 'C++'))
def re_ignore(expr):
"""Helper function to create regular expression ignore file
matcher functions"""
rex = re.compile(expr)
def match_re(fname):
return rex.match(fname)
return match_re
# This list contains a list of functions that are called to determine
# if a file should be excluded from the style matching rules or
# not. The functions are called with the file name relative to the
# repository root (without a leading slash) as their argument. A file
# is excluded if any function in the list returns true.
style_ignores = [
# Ignore external projects as they are unlikely to follow the gem5
# coding convention.
re_ignore("^ext/"),
]
def check_ignores(fname):
"""Check if a file name matches any of the ignore rules"""
for rule in style_ignores:
if rule(fname):
return True
return False
def modified_regions(old_data, new_data):
regions = Regions()
beg = None
for pbeg, pend, fbeg, fend in bdiff.blocks(old_data, new_data):
if beg is not None and beg != fbeg:
regions.append(beg, fbeg)
beg = fend
return regions
def modregions(wctx, fname):
fctx = wctx.filectx(fname)
pctx = fctx.parents()
file_data = fctx.data()
lines = mdiff.splitnewlines(file_data)
if len(pctx) in (1, 2):
mod_regions = modified_regions(pctx[0].data(), file_data)
if len(pctx) == 2:
m2 = modified_regions(pctx[1].data(), file_data)
# only the lines that are new in both
mod_regions &= m2
else:
mod_regions = Regions()
mod_regions.append(0, len(lines))
return mod_regions
class UserInterface(object):
def __init__(self, verbose=False):
self.verbose = verbose
def prompt(self, prompt, results, default):
while True:
result = self.do_prompt(prompt, results, default)
if result in results:
return result
class MercurialUI(UserInterface):
def __init__(self, ui, *args, **kwargs):
super(MercurialUI, self).__init__(*args, **kwargs)
self.ui = ui
def do_prompt(self, prompt, results, default):
return self.ui.prompt(prompt, default=default)
def write(self, string):
self.ui.write(string)
class StdioUI(UserInterface):
def do_prompt(self, prompt, results, default):
return raw_input(prompt) or default
def write(self, string):
sys.stdout.write(string)
class Verifier(object):
"""Base class for style verifier objects
Subclasses must define these class attributes:
languages = set of strings identifying applicable languages
test_name = long descriptive name of test, will be used in
messages such as "error in <foo>" or "invalid <foo>"
opt_name = short name used to generate command-line options to
control the test (--fix-<foo>, --ignore-<foo>, etc.)
"""
def __init__(self, ui, repo, opts):
self.ui = ui
self.repo = repo
# opt_name must be defined as a class attribute of derived classes.
# Check test-specific opts first as these have precedence.
self.opt_fix = opts.get('fix_' + self.opt_name, False)
self.opt_ignore = opts.get('ignore_' + self.opt_name, False)
self.opt_skip = opts.get('skip_' + self.opt_name, False)
# If no test-specific opts were set, then set based on "-all" opts.
if not (self.opt_fix or self.opt_ignore or self.opt_skip):
self.opt_fix = opts.get('fix_all', False)
self.opt_ignore = opts.get('ignore_all', False)
self.opt_skip = opts.get('skip_all', False)
def __getattr__(self, attr):
if attr in ('prompt', 'write'):
return getattr(self.ui, attr)
if attr == 'wctx':
try:
wctx = repo.workingctx()
except:
from mercurial import context
wctx = context.workingctx(repo)
self.wctx = wctx
return wctx
raise AttributeError
def open(self, filename, mode):
filename = self.repo.wjoin(filename)
try:
f = file(filename, mode)
except OSError, msg:
print 'could not open file %s: %s' % (filename, msg)
return None
return f
def skip(self, filename):
filename = self.repo.wjoin(filename)
# We never want to handle symlinks, so always skip them: If the location
# pointed to is a directory, skip it. If the location is a file inside
# the gem5 directory, it will be checked as a file, so symlink can be
# skipped. If the location is a file outside gem5, we don't want to
# check it anyway.
if os.path.islink(filename):
return True
return lang_type(filename) not in self.languages
def check(self, filename, regions=all_regions):
"""Check specified regions of file 'filename'.
Line-by-line checks can simply provide a check_line() method
that returns True if the line is OK and False if it has an
error. Verifiers that need a multi-line view (like
SortedIncludes) must override this entire function.
Returns a count of errors (0 if none), though actual non-zero
count value is not currently used anywhere.
"""
f = self.open(filename, 'r')
errors = 0
for num,line in enumerate(f):
if num not in regions:
continue
if not self.check_line(line):
self.write("invalid %s in %s:%d\n" % \
(self.test_name, filename, num + 1))
if self.ui.verbose:
self.write(">>%s<<\n" % line[:-1])
errors += 1
return errors
def fix(self, filename, regions=all_regions):
"""Fix specified regions of file 'filename'.
Line-by-line fixes can simply provide a fix_line() method that
returns the fixed line. Verifiers that need a multi-line view
(like SortedIncludes) must override this entire function.
"""
f = self.open(filename, 'r+')
lines = list(f)
f.seek(0)
f.truncate()
for i,line in enumerate(lines):
if i in regions:
line = self.fix_line(line)
f.write(line)
f.close()
def apply(self, filename, regions=all_regions):
"""Possibly apply to specified regions of file 'filename'.
Verifier is skipped if --skip-<test> option was provided or if
file is not of an applicable type. Otherwise file is checked
and error messages printed. Errors are fixed or ignored if
the corresponding --fix-<test> or --ignore-<test> options were
provided. If neither, the user is prompted for an action.
Returns True to abort, False otherwise.
"""
if not (self.opt_skip or self.skip(filename)):
errors = self.check(filename, regions)
if errors and not self.opt_ignore:
if self.opt_fix:
self.fix(filename, regions)
else:
result = self.ui.prompt("(a)bort, (i)gnore, or (f)ix?",
'aif', 'a')
if result == 'f':
self.fix(filename, regions)
elif result == 'a':
return True # abort
return False
class Whitespace(Verifier):
"""Check whitespace.
Specifically:
- No tabs used for indent
- No trailing whitespace
"""
languages = set(('C', 'C++', 'swig', 'python', 'asm', 'isa', 'scons'))
test_name = 'whitespace'
opt_name = 'white'
def check_line(self, line):
match = lead.search(line)
if match and match.group(1).find('\t') != -1:
return False
match = trail.search(line)
if match:
return False
return True
def fix_line(self, line):
if lead.search(line):
newline = ''
for i,c in enumerate(line):
if c == ' ':
newline += ' '
elif c == '\t':
newline += ' ' * (tabsize - len(newline) % tabsize)
else:
newline += line[i:]
break
line = newline
return line.rstrip() + '\n'
class ControlSpace(Verifier):
"""Check for exactly one space after if/while/for"""
languages = set(('C', 'C++'))
test_name = 'spacing after if/while/for'
opt_name = 'control'
def check_line(self, line):
match = any_control.search(line)
return not (match and match.group(2) != " ")
def fix_line(self, line):
new_line = any_control.sub(r'\1 (', line)
return new_line
class SortedIncludes(Verifier):
"""Check for proper sorting of include statements"""
languages = sort_includes.default_languages
test_name = 'include file order'
opt_name = 'include'
def __init__(self, *args, **kwargs):
super(SortedIncludes, self).__init__(*args, **kwargs)
self.sort_includes = sort_includes.SortIncludes()
def check(self, filename, regions=all_regions):
f = self.open(filename, 'r')
lines = [ l.rstrip('\n') for l in f.xreadlines() ]
old = ''.join(line + '\n' for line in lines)
f.close()
if len(lines) == 0:
return 0
language = lang_type(filename, lines[0])
sort_lines = list(self.sort_includes(lines, filename, language))
new = ''.join(line + '\n' for line in sort_lines)
mod = modified_regions(old, new)
modified = mod & regions
if modified:
self.write("invalid sorting of includes in %s\n" % (filename))
if self.ui.verbose:
for start, end in modified.regions:
self.write("bad region [%d, %d)\n" % (start, end))
return 1
return 0
def fix(self, filename, regions=all_regions):
f = self.open(filename, 'r+')
old = f.readlines()
lines = [ l.rstrip('\n') for l in old ]
language = lang_type(filename, lines[0])
sort_lines = list(self.sort_includes(lines, filename, language))
new = ''.join(line + '\n' for line in sort_lines)
f.seek(0)
f.truncate()
for i,line in enumerate(sort_lines):
f.write(line)
f.write('\n')
f.close()
def linelen(line):
tabs = line.count('\t')
if not tabs:
return len(line)
count = 0
for c in line:
if c == '\t':
count += tabsize - count % tabsize
else:
count += 1
return count
class LineLength(Verifier):
languages = set(('C', 'C++', 'swig', 'python', 'asm', 'isa', 'scons'))
test_name = 'line length'
opt_name = 'length'
def check_line(self, line):
return linelen(line) <= 78
def fix(self, filename, regions=all_regions):
self.write("Warning: cannot automatically fix overly long lines.\n")
class BoolCompare(Verifier):
languages = set(('C', 'C++', 'python'))
test_name = 'boolean comparison'
opt_name = 'boolcomp'
regex = re.compile(r'\s*==\s*([Tt]rue|[Ff]alse)\b')
def check_line(self, line):
return self.regex.search(line) == None
def fix_line(self, line):
match = self.regex.search(line)
if match:
if match.group(1) in ('true', 'True'):
line = self.regex.sub('', line)
else:
self.write("Warning: cannot automatically fix "
"comparisons with false/False.\n")
return line
# list of all verifier classes
all_verifiers = [
Whitespace,
ControlSpace,
LineLength,
BoolCompare,
SortedIncludes
]
class ValidationStats(object):
def __init__(self):
self.toolong = 0
self.toolong80 = 0
self.leadtabs = 0
self.trailwhite = 0
self.badcontrol = 0
self.cret = 0
def dump(self):
print '''\
%d violations of lines over 79 chars. %d of which are 80 chars exactly.
%d cases of whitespace at the end of a line.
%d cases of tabs to indent.
%d bad parens after if/while/for.
%d carriage returns found.
''' % (self.toolong, self.toolong80, self.trailwhite, self.leadtabs,
self.badcontrol, self.cret)
def __nonzero__(self):
return self.toolong or self.toolong80 or self.leadtabs or \
self.trailwhite or self.badcontrol or self.cret
def validate(filename, stats, verbose, exit_code):
lang = lang_type(filename)
if lang not in format_types:
return
def msg(lineno, line, message):
print '%s:%d>' % (filename, lineno + 1), message
if verbose > 2:
print line
def bad():
if exit_code is not None:
sys.exit(exit_code)
try:
f = file(filename, 'r')
except OSError:
if verbose > 0:
print 'could not open file %s' % filename
bad()
return
for i,line in enumerate(f):
line = line.rstrip('\n')
# no carriage returns
if line.find('\r') != -1:
self.cret += 1
if verbose > 1:
msg(i, line, 'carriage return found')
bad()
# lines max out at 79 chars
llen = linelen(line)
if llen > 79:
stats.toolong += 1
if llen == 80:
stats.toolong80 += 1
if verbose > 1:
msg(i, line, 'line too long (%d chars)' % llen)
bad()
# no tabs used to indent
match = lead.search(line)
if match and match.group(1).find('\t') != -1:
stats.leadtabs += 1
if verbose > 1:
msg(i, line, 'using tabs to indent')
bad()
# no trailing whitespace
if trail.search(line):
stats.trailwhite +=1
if verbose > 1:
msg(i, line, 'trailing whitespace')
bad()
# for c++, exactly one space betwen if/while/for and (
if lang == 'C++':
match = any_control.search(line)
if match and match.group(2) != " ":
stats.badcontrol += 1
if verbose > 1:
msg(i, line, 'improper spacing after %s' % match.group(1))
bad()
def _modified_regions(repo, patterns, **kwargs):
opt_all = kwargs.get('all', False)
opt_no_ignore = kwargs.get('no_ignore', False)
# Import the match (repository file name matching helper)
# function. Different versions of Mercurial keep it in different
# modules and implement them differently.
try:
from mercurial import scmutil
m = scmutil.match(repo[None], patterns, kwargs)
except ImportError:
from mercurial import cmdutil
m = cmdutil.match(repo, patterns, kwargs)
modified, added, removed, deleted, unknown, ignore, clean = \
repo.status(match=m, clean=opt_all)
if not opt_all:
try:
wctx = repo.workingctx()
except:
from mercurial import context
wctx = context.workingctx(repo)
files = [ (fn, all_regions) for fn in added ] + \
[ (fn, modregions(wctx, fn)) for fn in modified ]
else:
files = [ (fn, all_regions) for fn in added + modified + clean ]
for fname, mod_regions in files:
if opt_no_ignore or not check_ignores(fname):
yield fname, mod_regions
def do_check_style(hgui, repo, *pats, **opts):
"""check files for proper m5 style guidelines
Without an argument, checks all modified and added files for gem5
coding style violations. A list of files can be specified to limit
the checker to a subset of the repository. The style rules are
normally applied on a diff of the repository state (i.e., added
files are checked in their entirety while only modifications of
modified files are checked).
The --all option can be specified to include clean files and check
modified files in their entirety.
The --fix-<check>, --ignore-<check>, and --skip-<check> options
can be used to control individual style checks:
--fix-<check> will perform the check and automatically attempt to
fix sny style error (printing a warning if unsuccessful)
--ignore-<check> will perform the check but ignore any errors
found (other than printing a message for each)
--skip-<check> will skip performing the check entirely
If none of these options are given, all checks will be performed
and the user will be prompted on how to handle each error.
--fix-all, --ignore-all, and --skip-all are equivalent to specifying
--fix-<check>, --ignore-<check>, or --skip-<check> for all checks,
respectively. However, option settings for specific checks take
precedence. Thus --skip-all --fix-white can be used to skip every
check other than whitespace errors, which will be checked and
automatically fixed.
The -v/--verbose flag will display the offending line(s) as well
as their location.
"""
ui = MercurialUI(hgui, verbose=hgui.verbose)
# instantiate varifier objects
verifiers = [v(ui, repo, opts) for v in all_verifiers]
for fname, mod_regions in _modified_regions(repo, pats, **opts):
for verifier in verifiers:
if verifier.apply(fname, mod_regions):
return True
return False
def do_check_format(hgui, repo, *pats, **opts):
"""check files for gem5 code formatting violations
Without an argument, checks all modified and added files for gem5
code formatting violations. A list of files can be specified to
limit the checker to a subset of the repository. The style rules
are normally applied on a diff of the repository state (i.e.,
added files are checked in their entirety while only modifications
of modified files are checked).
The --all option can be specified to include clean files and check
modified files in their entirety.
"""
ui = MercurialUI(hgui, hgui.verbose)
verbose = 0
for fname, mod_regions in _modified_regions(repo, pats, **opts):
stats = ValidationStats()
validate(joinpath(repo.root, fname), stats, verbose, None)
if stats:
print "%s:" % fname
stats.dump()
result = ui.prompt("invalid formatting\n(i)gnore or (a)bort?",
'ai', 'a')
if result == 'a':
return True
return False
def check_hook(hooktype):
if hooktype not in ('pretxncommit', 'pre-qrefresh'):
raise AttributeError, \
"This hook is not meant for %s" % hooktype
# This function provides a hook that is called before transaction
# commit and on qrefresh
def check_style(ui, repo, hooktype, **kwargs):
check_hook(hooktype)
args = {}
try:
return do_check_style(ui, repo, **args)
except Exception, e:
import traceback
traceback.print_exc()
return True
def check_format(ui, repo, hooktype, **kwargs):
check_hook(hooktype)
args = {}
try:
return do_check_format(ui, repo, **args)
except Exception, e:
import traceback
traceback.print_exc()
return True
try:
from mercurial.i18n import _
except ImportError:
def _(arg):
return arg
_common_region_options = [
('a', 'all', False,
_("include clean files and unmodified parts of modified files")),
('', 'no-ignore', False, _("ignore the style ignore list")),
]
fix_opts = [('f', 'fix-all', False, _("fix all style errors"))] + \
[('', 'fix-' + v.opt_name, False,
_('fix errors in ' + v.test_name)) for v in all_verifiers]
ignore_opts = [('', 'ignore-all', False, _("ignore all style errors"))] + \
[('', 'ignore-' + v.opt_name, False,
_('ignore errors in ' + v.test_name)) for v in all_verifiers]
skip_opts = [('', 'skip-all', False, _("skip all style error checks"))] + \
[('', 'skip-' + v.opt_name, False,
_('skip checking for ' + v.test_name)) for v in all_verifiers]
all_opts = fix_opts + ignore_opts + skip_opts
cmdtable = {
'^m5style' : (
do_check_style, all_opts + _common_region_options + commands.walkopts,
_('hg m5style [-a] [FILE]...')),
'^m5format' :
( do_check_format, [
] + _common_region_options + commands.walkopts,
_('hg m5format [FILE]...')),
}
if __name__ == '__main__':
import getopt
progname = sys.argv[0]
if len(sys.argv) < 2:
sys.exit('usage: %s <command> [<command args>]' % progname)
fixwhite_usage = '%s fixwhite [-t <tabsize> ] <path> [...] \n' % progname
chkformat_usage = '%s chkformat <path> [...] \n' % progname
chkwhite_usage = '%s chkwhite <path> [...] \n' % progname
command = sys.argv[1]
if command == 'fixwhite':
flags = 't:'
usage = fixwhite_usage
elif command == 'chkwhite':
flags = 'nv'
usage = chkwhite_usage
elif command == 'chkformat':
flags = 'nv'
usage = chkformat_usage
else:
sys.exit(fixwhite_usage + chkwhite_usage + chkformat_usage)
opts, args = getopt.getopt(sys.argv[2:], flags)
code = 1
verbose = 1
for opt,arg in opts:
if opt == '-n':
code = None
if opt == '-t':
tabsize = int(arg)
if opt == '-v':
verbose += 1
if command == 'fixwhite':
for filename in args:
fixwhite(filename, tabsize)
elif command == 'chkwhite':
for filename in args:
for line,num in checkwhite(filename):
print 'invalid whitespace: %s:%d' % (filename, num)
if verbose:
print '>>%s<<' % line[:-1]
elif command == 'chkformat':
stats = ValidationStats()
for filename in args:
validate(filename, stats=stats, verbose=verbose, exit_code=code)
if verbose > 0:
stats.dump()
else:
sys.exit("command '%s' not found" % command)