scons, style: Rename style.py to hgstyle.py

The Mercurial style checker extensions are currently stored in
style.py. This is not ideal since they won't work with other version
control systems. This changeset renames style.py to hgstyle.py and
adds upgrade code to scons that automatically updates the hooks in
hgrc.

Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Reviewed-by: Curtis Dunham <curtis.dunham@arm.com>
Reviewed-by: Nathanael Premillieu <nathananel.premillieu@arm.com>
Reviewed-by: Steve Reinhardt <steve.reinhardt@amd.com>

--HG--
rename : util/style.py => util/hgstyle.py
extra : rebase_source : ee8107ef245901371b368b7c2046ecdd89e3ff4c

1 files changed, 0 insertions, 752 deletions

diff --git a/util/style.py b/util/style.py
deleted file mode 100755
index fd40e781a..000000000
--- a/util/style.py
+++ /dev/null
@@ -1,752 +0,0 @@
-#! /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
-            line = line.rstrip('\n')
-            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 argparse
-
-    parser = argparse.ArgumentParser(
-        description="Check a file for style violations")
-
-    parser.add_argument("--verbose", "-v", action="count",
-                        help="Produce verbose output")
-
-    parser.add_argument("file", metavar="FILE", nargs="+",
-                        type=str,
-                        help="Source file to inspect")
-
-    args = parser.parse_args()
-
-    stats = ValidationStats()
-    for filename in args.file:
-        validate(filename, stats=stats, verbose=args.verbose, exit_code=1)
-
-        if args.verbose > 0:
-            stats.dump()