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Date:   Thu, 6 Apr 2023 13:10:51 -0700
From:   John Hubbard <jhubbard@...dia.com>
To:     Zorro Lang <zlang@...nel.org>, fstests@...r.kernel.org
Cc:     linux-btrfs@...r.kernel.org, ceph-devel@...r.kernel.org,
        linux-cifs@...r.kernel.org, linux-ext4@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-fsdevel@...r.kernel.org, linux-nfs@...r.kernel.org,
        ocfs2-devel@....oracle.com, linux-unionfs@...r.kernel.org,
        jack@...e.com, linux-xfs@...r.kernel.org, fdmanana@...e.com,
        ebiggers@...gle.com, brauner@...nel.org, amir73il@...il.com,
        djwong@...nel.org, anand.jain@...cle.com
Subject: Re: [PATCH 1/5] fstests: add MAINTAINERS and get_maintainer.pl files

On 4/4/23 10:14, Zorro Lang wrote:
> As fstests covers more and more fs testing, so we always get help
> from fs specific mailing list, due to they learn about their features
> and bugs more. Besides that, some folks help to review patches
> (relevant with them) more often.
> 
> So I'd like to bring in the similar way of linux/MAINTAINERS, records
> fs relevant mailing lists, reviewers or co-maintainers. To recognize
> the contribution from them, and help more users to know who or what
> mailing list can be added in CC list of a patch.
> 
> The MAINTAINERS and get_maintainer.pl are copied from linux project,
> then made some changes for fstests specially.

Hi Zorro,

Instead of forking 23,000+ lines of MAINTAINERS and 2600+ lines of
script into a strange tools/ location ("tools/" would then mean fstests,
and "scripts/" would mean "everything else), this upgrade really should
simply be done in place.

I don't see much in the following patches that *truly* requires forking
these files. And if you fix them up in place, then more people will be
able to find the fstests maintainers easily, too.

thanks,
-- 
John Hubbard
NVIDIA

> 
> Signed-off-by: Zorro Lang <zlang@...nel.org>
> ---
>  MAINTAINERS             |  116 ++
>  tools/get_maintainer.pl | 2616 +++++++++++++++++++++++++++++++++++++++
>  2 files changed, 2732 insertions(+)
>  create mode 100644 MAINTAINERS
>  create mode 100755 tools/get_maintainer.pl
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> new file mode 100644
> index 00000000..09b1a5a3
> --- /dev/null
> +++ b/MAINTAINERS
> @@ -0,0 +1,116 @@
> +List of reviewers, co-maintainers and how to submit fstests changes
> +====================================================
> +
> +Please try to follow the guidelines below.  This will make things
> +easier on the maintainers.  Not all of these guidelines matter for every
> +trivial patch so apply some common sense.
> +
> +Tips for patch submitters
> +-------------------------
> +
> +1.	Always *test* your changes, however small, on at least 4 or
> +	5 people, preferably many more.
> +
> +2.	Make sure your changes compile correctly in multiple
> +	configurations. In particular check that changes work both as a
> +	module and built into the kernel.
> +
> +3.	When you are happy with a change make it generally available for
> +	testing and await feedback.
> +
> +4.	Make a patch available to fstests@ list directly, that's the only
> +	one mailing list which maintain the whole fstests project.
> +
> +	PLEASE CC: the relevant reviewers, co-maintainers and mailing lists
> +	that are generated by ``tools/get_maintainer.pl.``
> +
> +	PLEASE try to include any credit lines you want added with the
> +	patch. It avoids people being missed off by mistake and makes
> +	it easier to know who wants adding and who doesn't.
> +
> +	PLEASE document known bugs. If it doesn't work for everything
> +	or does something very odd once a month document it.
> +
> +5.	Make sure you have the right to send any changes you make. If you
> +	do changes at work you may find your employer owns the patch
> +	not you.
> +
> +6.	Happy hacking.
> +
> +Descriptions of section entries and preferred order
> +---------------------------------------------------
> +
> +	M: *Mail* patches to: FullName <address@...ain>
> +	   These people might be a co-maintainer (with Supported status) or
> +	   maintainer (with Maintained status).
> +	R: Designated *Reviewer*: FullName <address@...ain>
> +	   These reviewers should be CCed on patches.
> +	L: Besides fstests@ list itself, this *Mailing list* is relevant to
> +	   this area, should be CCed.
> +	S: *Status*, one of the following (note: all things are maintained by
> +	   fstests@...r.kernel.org):
> +	   Supported:	Someone is actually paid to look after this.
> +	   Maintained:	Someone actually looks after it, has the privilege to
> +			merge & push.
> +	   Odd Fixes:	It has a maintainer but they don't have time to do
> +			much other than throw the odd patch in. See below..
> +	   Orphan:	No current maintainer [but maybe you could take the
> +			role as you write your new code].
> +	   Obsolete:	Old code. Something tagged obsolete generally means
> +			it has been replaced by a better system and you
> +			should be using that.
> +	W: *Web-page* with status/info
> +	Q: *Patchwork* web based patch tracking system site
> +	B: URI for where to file *bugs*. A web-page with detailed bug
> +	   filing info, a direct bug tracker link, or a mailto: URI.
> +	C: URI for *chat* protocol, server and channel where developers
> +	   usually hang out, for example irc://server/channel.
> +	P: Subsystem Profile document for more details submitting
> +	   patches to the given subsystem. This is either an in-tree file,
> +	   or a URI.
> +	T: *SCM* tree type and location.
> +	   Type is one of: git, hg, quilt, stgit, topgit
> +	F: *Files* and directories wildcard patterns.
> +	   A trailing slash includes all files and subdirectory files.
> +	   F:	tests/xfs/	all files in and below tests/xfs
> +	   F:	tests/generic/*	all files in tests/generic, but not below
> +	   F:	*/ext4/*	all files in "any top level directory"/ext4
> +	   One pattern per line.  Multiple F: lines acceptable.
> +	X: *Excluded* files and directories that are NOT maintained, same
> +	   rules as F:. Files exclusions are tested before file matches.
> +	   Can be useful for excluding a specific subdirectory, for instance:
> +	   F:	src/
> +	   X:	src/vfs
> +	   matches all files in and below net excluding net/ipv6/
> +	N: Files and directories *Regex* patterns.
> +	   N:	[^a-z]tegra	all files whose path contains tegra
> +	                        (not including files like integrator)
> +	   One pattern per line.  Multiple N: lines acceptable.
> +	   tools/get_maintainer.pl has different behavior for files that
> +	   match F: pattern and matches of N: patterns.  By default,
> +	   get_maintainer will not look at git log history when an F: pattern
> +	   match occurs.  When an N: match occurs, git log history is used
> +	   to also notify the people that have git commit signatures.
> +	K: *Content regex* (perl extended) pattern match in a patch or file.
> +	   For instance:
> +	   K: of_get_profile
> +	      matches patches or files that contain "of_get_profile"
> +	   K: \b(printk|pr_(info|err))\b
> +	      matches patches or files that contain one or more of the words
> +	      printk, pr_info or pr_err
> +	   One regex pattern per line.  Multiple K: lines acceptable.
> +
> +Maintainers List
> +----------------
> +
> +.. note:: The whole fstests are maintained by fstests@...r.kernel.org, so you
> +	  should send patch to fstests@ at least. Other relevant mailing list
> +	  or reviewer or co-maintainer can be in cc list.
> +
> +ALL
> +M:	Zorro Lang <zlang@...nel.org>
> +L:	fstests@...r.kernel.org
> +S:	Maintained
> +T:	git git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git
> +F:	*
> +F:	*/
> diff --git a/tools/get_maintainer.pl b/tools/get_maintainer.pl
> new file mode 100755
> index 00000000..376c7c02
> --- /dev/null
> +++ b/tools/get_maintainer.pl
> @@ -0,0 +1,2616 @@
> +#!/usr/bin/env perl
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# This script is copied from linux/scripts/get_maintainer.pl, then
> +# changes for fstests specifically.
> +#
> +# Print selected MAINTAINERS information for
> +# the files modified in a patch or for a file
> +#
> +# usage: perl tools/get_maintainer.pl [OPTIONS] <patch>
> +#        perl tools/get_maintainer.pl [OPTIONS] -f <file>
> +
> +use warnings;
> +use strict;
> +
> +my $P = $0;
> +my $V = '0.26';
> +
> +use Getopt::Long qw(:config no_auto_abbrev);
> +use Cwd;
> +use File::Find;
> +use File::Spec::Functions;
> +
> +my $cur_path = fastgetcwd() . '/';
> +my $lk_path = "./";
> +my $email = 1;
> +my $email_usename = 1;
> +my $email_maintainer = 1;
> +my $email_reviewer = 1;
> +my $email_fixes = 1;
> +my $email_list = 1;
> +my $email_moderated_list = 1;
> +my $email_subscriber_list = 0;
> +my $email_git_penguin_chiefs = 0;
> +my $email_git = 0;
> +my $email_git_all_signature_types = 0;
> +my $email_git_blame = 0;
> +my $email_git_blame_signatures = 1;
> +my $email_git_fallback = 1;
> +my $email_git_min_signatures = 1;
> +my $email_git_max_maintainers = 5;
> +my $email_git_min_percent = 5;
> +my $email_git_since = "1-year-ago";
> +my $email_hg_since = "-365";
> +my $interactive = 0;
> +my $email_remove_duplicates = 1;
> +my $email_use_mailmap = 1;
> +my $output_multiline = 1;
> +my $output_separator = ", ";
> +my $output_roles = 0;
> +my $output_rolestats = 1;
> +my $output_section_maxlen = 50;
> +my $scm = 0;
> +my $tree = 1;
> +my $web = 0;
> +my $subsystem = 0;
> +my $status = 0;
> +my $letters = "";
> +my $keywords = 1;
> +my $sections = 0;
> +my $email_file_emails = 0;
> +my $from_filename = 0;
> +my $pattern_depth = 0;
> +my $self_test = undef;
> +my $version = 0;
> +my $help = 0;
> +my $find_maintainer_files = 0;
> +my $maintainer_path;
> +my $vcs_used = 0;
> +
> +my $exit = 0;
> +
> +my @files = ();
> +my @fixes = ();			# If a patch description includes Fixes: lines
> +my @range = ();
> +my @keyword_tvi = ();
> +my @file_emails = ();
> +
> +my %commit_author_hash;
> +my %commit_signer_hash;
> +
> +my @penguin_chief = ();
> +push(@penguin_chief, "Zorro Lang:zlang\@kernel.org");
> +
> +my @penguin_chief_names = ();
> +foreach my $chief (@penguin_chief) {
> +    if ($chief =~ m/^(.*):(.*)/) {
> +	my $chief_name = $1;
> +	my $chief_addr = $2;
> +	push(@penguin_chief_names, $chief_name);
> +    }
> +}
> +my $penguin_chiefs = "\(" . join("|", @penguin_chief_names) . "\)";
> +
> +# Signature types of people who are either
> +# 	a) responsible for the code in question, or
> +# 	b) familiar enough with it to give relevant feedback
> +my @signature_tags = ();
> +push(@signature_tags, "Signed-off-by:");
> +push(@signature_tags, "Reviewed-by:");
> +push(@signature_tags, "Acked-by:");
> +
> +my $signature_pattern = "\(" . join("|", @signature_tags) . "\)";
> +
> +# rfc822 email address - preloaded methods go here.
> +my $rfc822_lwsp = "(?:(?:\\r\\n)?[ \\t])";
> +my $rfc822_char = '[\\000-\\377]';
> +
> +# VCS command support: class-like functions and strings
> +
> +my %VCS_cmds;
> +
> +my %VCS_cmds_git = (
> +    "execute_cmd" => \&git_execute_cmd,
> +    "available" => '(which("git") ne "") && (-e ".git")',
> +    "find_signers_cmd" =>
> +	"git log --no-color --follow --since=\$email_git_since " .
> +	    '--numstat --no-merges ' .
> +	    '--format="GitCommit: %H%n' .
> +		      'GitAuthor: %an <%ae>%n' .
> +		      'GitDate: %aD%n' .
> +		      'GitSubject: %s%n' .
> +		      '%b%n"' .
> +	    " -- \$file",
> +    "find_commit_signers_cmd" =>
> +	"git log --no-color " .
> +	    '--numstat ' .
> +	    '--format="GitCommit: %H%n' .
> +		      'GitAuthor: %an <%ae>%n' .
> +		      'GitDate: %aD%n' .
> +		      'GitSubject: %s%n' .
> +		      '%b%n"' .
> +	    " -1 \$commit",
> +    "find_commit_author_cmd" =>
> +	"git log --no-color " .
> +	    '--numstat ' .
> +	    '--format="GitCommit: %H%n' .
> +		      'GitAuthor: %an <%ae>%n' .
> +		      'GitDate: %aD%n' .
> +		      'GitSubject: %s%n"' .
> +	    " -1 \$commit",
> +    "blame_range_cmd" => "git blame -l -L \$diff_start,+\$diff_length \$file",
> +    "blame_file_cmd" => "git blame -l \$file",
> +    "commit_pattern" => "^GitCommit: ([0-9a-f]{40,40})",
> +    "blame_commit_pattern" => "^([0-9a-f]+) ",
> +    "author_pattern" => "^GitAuthor: (.*)",
> +    "subject_pattern" => "^GitSubject: (.*)",
> +    "stat_pattern" => "^(\\d+)\\t(\\d+)\\t\$file\$",
> +    "file_exists_cmd" => "git ls-files \$file",
> +    "list_files_cmd" => "git ls-files \$file",
> +);
> +
> +my %VCS_cmds_hg = (
> +    "execute_cmd" => \&hg_execute_cmd,
> +    "available" => '(which("hg") ne "") && (-d ".hg")',
> +    "find_signers_cmd" =>
> +	"hg log --date=\$email_hg_since " .
> +	    "--template='HgCommit: {node}\\n" .
> +	                "HgAuthor: {author}\\n" .
> +			"HgSubject: {desc}\\n'" .
> +	    " -- \$file",
> +    "find_commit_signers_cmd" =>
> +	"hg log " .
> +	    "--template='HgSubject: {desc}\\n'" .
> +	    " -r \$commit",
> +    "find_commit_author_cmd" =>
> +	"hg log " .
> +	    "--template='HgCommit: {node}\\n" .
> +		        "HgAuthor: {author}\\n" .
> +			"HgSubject: {desc|firstline}\\n'" .
> +	    " -r \$commit",
> +    "blame_range_cmd" => "",		# not supported
> +    "blame_file_cmd" => "hg blame -n \$file",
> +    "commit_pattern" => "^HgCommit: ([0-9a-f]{40,40})",
> +    "blame_commit_pattern" => "^([ 0-9a-f]+):",
> +    "author_pattern" => "^HgAuthor: (.*)",
> +    "subject_pattern" => "^HgSubject: (.*)",
> +    "stat_pattern" => "^(\\d+)\t(\\d+)\t\$file\$",
> +    "file_exists_cmd" => "hg files \$file",
> +    "list_files_cmd" => "hg manifest -R \$file",
> +);
> +
> +my $conf = which_conf(".get_maintainer.conf");
> +if (-f $conf) {
> +    my @conf_args;
> +    open(my $conffile, '<', "$conf")
> +	or warn "$P: Can't find a readable .get_maintainer.conf file $!\n";
> +
> +    while (<$conffile>) {
> +	my $line = $_;
> +
> +	$line =~ s/\s*\n?$//g;
> +	$line =~ s/^\s*//g;
> +	$line =~ s/\s+/ /g;
> +
> +	next if ($line =~ m/^\s*#/);
> +	next if ($line =~ m/^\s*$/);
> +
> +	my @words = split(" ", $line);
> +	foreach my $word (@words) {
> +	    last if ($word =~ m/^#/);
> +	    push (@conf_args, $word);
> +	}
> +    }
> +    close($conffile);
> +    unshift(@ARGV, @conf_args) if @conf_args;
> +}
> +
> +my @ignore_emails = ();
> +my $ignore_file = which_conf(".get_maintainer.ignore");
> +if (-f $ignore_file) {
> +    open(my $ignore, '<', "$ignore_file")
> +	or warn "$P: Can't find a readable .get_maintainer.ignore file $!\n";
> +    while (<$ignore>) {
> +	my $line = $_;
> +
> +	$line =~ s/\s*\n?$//;
> +	$line =~ s/^\s*//;
> +	$line =~ s/\s+$//;
> +	$line =~ s/#.*$//;
> +
> +	next if ($line =~ m/^\s*$/);
> +	if (rfc822_valid($line)) {
> +	    push(@ignore_emails, $line);
> +	}
> +    }
> +    close($ignore);
> +}
> +
> +if ($#ARGV > 0) {
> +    foreach (@ARGV) {
> +        if ($_ =~ /^-{1,2}self-test(?:=|$)/) {
> +            die "$P: using --self-test does not allow any other option or argument\n";
> +        }
> +    }
> +}
> +
> +if (!GetOptions(
> +		'email!' => \$email,
> +		'git!' => \$email_git,
> +		'git-all-signature-types!' => \$email_git_all_signature_types,
> +		'git-blame!' => \$email_git_blame,
> +		'git-blame-signatures!' => \$email_git_blame_signatures,
> +		'git-fallback!' => \$email_git_fallback,
> +		'git-chief-penguins!' => \$email_git_penguin_chiefs,
> +		'git-min-signatures=i' => \$email_git_min_signatures,
> +		'git-max-maintainers=i' => \$email_git_max_maintainers,
> +		'git-min-percent=i' => \$email_git_min_percent,
> +		'git-since=s' => \$email_git_since,
> +		'hg-since=s' => \$email_hg_since,
> +		'i|interactive!' => \$interactive,
> +		'remove-duplicates!' => \$email_remove_duplicates,
> +		'mailmap!' => \$email_use_mailmap,
> +		'm!' => \$email_maintainer,
> +		'r!' => \$email_reviewer,
> +		'n!' => \$email_usename,
> +		'l!' => \$email_list,
> +		'fixes!' => \$email_fixes,
> +		'moderated!' => \$email_moderated_list,
> +		's!' => \$email_subscriber_list,
> +		'multiline!' => \$output_multiline,
> +		'roles!' => \$output_roles,
> +		'rolestats!' => \$output_rolestats,
> +		'separator=s' => \$output_separator,
> +		'subsystem!' => \$subsystem,
> +		'status!' => \$status,
> +		'scm!' => \$scm,
> +		'tree!' => \$tree,
> +		'web!' => \$web,
> +		'letters=s' => \$letters,
> +		'pattern-depth=i' => \$pattern_depth,
> +		'k|keywords!' => \$keywords,
> +		'sections!' => \$sections,
> +		'fe|file-emails!' => \$email_file_emails,
> +		'f|file' => \$from_filename,
> +		'find-maintainer-files' => \$find_maintainer_files,
> +		'mpath|maintainer-path=s' => \$maintainer_path,
> +		'self-test:s' => \$self_test,
> +		'v|version' => \$version,
> +		'h|help|usage' => \$help,
> +		)) {
> +    die "$P: invalid argument - use --help if necessary\n";
> +}
> +
> +if ($help != 0) {
> +    usage();
> +    exit 0;
> +}
> +
> +if ($version != 0) {
> +    print("${P} ${V}\n");
> +    exit 0;
> +}
> +
> +if (defined $self_test) {
> +    read_all_maintainer_files();
> +    self_test();
> +    exit 0;
> +}
> +
> +if (-t STDIN && !@...V) {
> +    # We're talking to a terminal, but have no command line arguments.
> +    die "$P: missing patchfile or -f file - use --help if necessary\n";
> +}
> +
> +$output_multiline = 0 if ($output_separator ne ", ");
> +$output_rolestats = 1 if ($interactive);
> +$output_roles = 1 if ($output_rolestats);
> +
> +if ($sections || $letters ne "") {
> +    $sections = 1;
> +    $email = 0;
> +    $email_list = 0;
> +    $scm = 0;
> +    $status = 0;
> +    $subsystem = 0;
> +    $web = 0;
> +    $keywords = 0;
> +    $interactive = 0;
> +} else {
> +    my $selections = $email + $scm + $status + $subsystem + $web;
> +    if ($selections == 0) {
> +	die "$P:  Missing required option: email, scm, status, subsystem or web\n";
> +    }
> +}
> +
> +if ($email &&
> +    ($email_maintainer + $email_reviewer +
> +     $email_list + $email_subscriber_list +
> +     $email_git + $email_git_penguin_chiefs + $email_git_blame) == 0) {
> +    die "$P: Please select at least 1 email option\n";
> +}
> +
> +if ($tree && !top_of_fstests_tree($lk_path)) {
> +    die "$P: The current directory does not appear to be "
> +	. "a fstests source tree.\n";
> +}
> +
> +## Read MAINTAINERS for type/value pairs
> +
> +my @typevalue = ();
> +my %keyword_hash;
> +my @mfiles = ();
> +my @self_test_info = ();
> +
> +sub read_maintainer_file {
> +    my ($file) = @_;
> +
> +    open (my $maint, '<', "$file")
> +	or die "$P: Can't open MAINTAINERS file '$file': $!\n";
> +    my $i = 1;
> +    while (<$maint>) {
> +	my $line = $_;
> +	chomp $line;
> +
> +	if ($line =~ m/^([A-Z]):\s*(.*)/) {
> +	    my $type = $1;
> +	    my $value = $2;
> +
> +	    ##Filename pattern matching
> +	    if ($type eq "F" || $type eq "X") {
> +		$value =~ s@\.@\\\.@g;       ##Convert . to \.
> +		$value =~ s/\*/\.\*/g;       ##Convert * to .*
> +		$value =~ s/\?/\./g;         ##Convert ? to .
> +		##if pattern is a directory and it lacks a trailing slash, add one
> +		if ((-d $value)) {
> +		    $value =~ s@([^/])$@$1/@;
> +		}
> +	    } elsif ($type eq "K") {
> +		$keyword_hash{@...evalue} = $value;
> +	    }
> +	    push(@typevalue, "$type:$value");
> +	} elsif (!(/^\s*$/ || /^\s*\#/)) {
> +	    push(@typevalue, $line);
> +	}
> +	if (defined $self_test) {
> +	    push(@self_test_info, {file=>$file, linenr=>$i, line=>$line});
> +	}
> +	$i++;
> +    }
> +    close($maint);
> +}
> +
> +sub find_is_maintainer_file {
> +    my ($file) = $_;
> +    return if ($file !~ m@...INTAINERS$@);
> +    $file = $File::Find::name;
> +    return if (! -f $file);
> +    push(@mfiles, $file);
> +}
> +
> +sub find_ignore_git {
> +    return grep { $_ !~ /^\.git$/; } @_;
> +}
> +
> +read_all_maintainer_files();
> +
> +sub read_all_maintainer_files {
> +    my $path = "${lk_path}MAINTAINERS";
> +    if (defined $maintainer_path) {
> +	$path = $maintainer_path;
> +	# Perl Cookbook tilde expansion if necessary
> +	$path =~ s@^~([^/]*)@ $1 ? (getpwnam($1))[7] : ( $ENV{HOME} || $ENV{LOGDIR} || (getpwuid($<))[7])@ex;
> +    }
> +
> +    if (-d $path) {
> +	$path .= '/' if ($path !~ m@/$@);
> +	if ($find_maintainer_files) {
> +	    find( { wanted => \&find_is_maintainer_file,
> +		    preprocess => \&find_ignore_git,
> +		    no_chdir => 1,
> +		}, "$path");
> +	} else {
> +	    opendir(DIR, "$path") or die $!;
> +	    my @files = readdir(DIR);
> +	    closedir(DIR);
> +	    foreach my $file (@files) {
> +		push(@mfiles, "$path$file") if ($file !~ /^\./);
> +	    }
> +	}
> +    } elsif (-f "$path") {
> +	push(@mfiles, "$path");
> +    } else {
> +	die "$P: MAINTAINER file not found '$path'\n";
> +    }
> +    die "$P: No MAINTAINER files found in '$path'\n" if (scalar(@mfiles) == 0);
> +    foreach my $file (@mfiles) {
> +	read_maintainer_file("$file");
> +    }
> +}
> +
> +sub maintainers_in_file {
> +    my ($file) = @_;
> +
> +    return if ($file =~ m@\bMAINTAINERS$@);
> +
> +    if (-f $file && ($email_file_emails || $file =~ /\.yaml$/)) {
> +	open(my $f, '<', $file)
> +	    or die "$P: Can't open $file: $!\n";
> +	my $text = do { local($/) ; <$f> };
> +	close($f);
> +
> +	my @poss_addr = $text =~ m$[A-Za-zÀ-ÿ\"\' \,\.\+-]*\s*[\,]*\s*[\(\<\{]{0,1}[A-Za-z0-9_\.\+-]+\@[A-Za-z0-9\.-]+\.[A-Za-z0-9]+[\)\>\}]{0,1}$g;
> +	push(@file_emails, clean_file_emails(@poss_addr));
> +    }
> +}
> +
> +#
> +# Read mail address map
> +#
> +
> +my $mailmap;
> +
> +read_mailmap();
> +
> +sub read_mailmap {
> +    $mailmap = {
> +	names => {},
> +	addresses => {}
> +    };
> +
> +    return if (!$email_use_mailmap || !(-f "${lk_path}.mailmap"));
> +
> +    open(my $mailmap_file, '<', "${lk_path}.mailmap")
> +	or warn "$P: Can't open .mailmap: $!\n";
> +
> +    while (<$mailmap_file>) {
> +	s/#.*$//; #strip comments
> +	s/^\s+|\s+$//g; #trim
> +
> +	next if (/^\s*$/); #skip empty lines
> +	#entries have one of the following formats:
> +	# name1 <mail1>
> +	# <mail1> <mail2>
> +	# name1 <mail1> <mail2>
> +	# name1 <mail1> name2 <mail2>
> +	# (see man git-shortlog)
> +
> +	if (/^([^<]+)<([^>]+)>$/) {
> +	    my $real_name = $1;
> +	    my $address = $2;
> +
> +	    $real_name =~ s/\s+$//;
> +	    ($real_name, $address) = parse_email("$real_name <$address>");
> +	    $mailmap->{names}->{$address} = $real_name;
> +
> +	} elsif (/^<([^>]+)>\s*<([^>]+)>$/) {
> +	    my $real_address = $1;
> +	    my $wrong_address = $2;
> +
> +	    $mailmap->{addresses}->{$wrong_address} = $real_address;
> +
> +	} elsif (/^(.+)<([^>]+)>\s*<([^>]+)>$/) {
> +	    my $real_name = $1;
> +	    my $real_address = $2;
> +	    my $wrong_address = $3;
> +
> +	    $real_name =~ s/\s+$//;
> +	    ($real_name, $real_address) =
> +		parse_email("$real_name <$real_address>");
> +	    $mailmap->{names}->{$wrong_address} = $real_name;
> +	    $mailmap->{addresses}->{$wrong_address} = $real_address;
> +
> +	} elsif (/^(.+)<([^>]+)>\s*(.+)\s*<([^>]+)>$/) {
> +	    my $real_name = $1;
> +	    my $real_address = $2;
> +	    my $wrong_name = $3;
> +	    my $wrong_address = $4;
> +
> +	    $real_name =~ s/\s+$//;
> +	    ($real_name, $real_address) =
> +		parse_email("$real_name <$real_address>");
> +
> +	    $wrong_name =~ s/\s+$//;
> +	    ($wrong_name, $wrong_address) =
> +		parse_email("$wrong_name <$wrong_address>");
> +
> +	    my $wrong_email = format_email($wrong_name, $wrong_address, 1);
> +	    $mailmap->{names}->{$wrong_email} = $real_name;
> +	    $mailmap->{addresses}->{$wrong_email} = $real_address;
> +	}
> +    }
> +    close($mailmap_file);
> +}
> +
> +## use the filenames on the command line or find the filenames in the patchfiles
> +
> +if (!@...V) {
> +    push(@ARGV, "&STDIN");
> +}
> +
> +foreach my $file (@ARGV) {
> +    if ($file ne "&STDIN") {
> +	$file = canonpath($file);
> +	##if $file is a directory and it lacks a trailing slash, add one
> +	if ((-d $file)) {
> +	    $file =~ s@([^/])$@$1/@;
> +	} elsif (!(-f $file)) {
> +	    die "$P: file '${file}' not found\n";
> +	}
> +    }
> +    if ($from_filename && (vcs_exists() && !vcs_file_exists($file))) {
> +	warn "$P: file '$file' not found in version control $!\n";
> +    }
> +    if ($from_filename || ($file ne "&STDIN" && vcs_file_exists($file))) {
> +	$file =~ s/^\Q${cur_path}\E//;	#strip any absolute path
> +	$file =~ s/^\Q${lk_path}\E//;	#or the path to the lk tree
> +	push(@files, $file);
> +	if ($file ne "MAINTAINERS" && -f $file && $keywords) {
> +	    open(my $f, '<', $file)
> +		or die "$P: Can't open $file: $!\n";
> +	    my $text = do { local($/) ; <$f> };
> +	    close($f);
> +	    if ($keywords) {
> +		foreach my $line (keys %keyword_hash) {
> +		    if ($text =~ m/$keyword_hash{$line}/x) {
> +			push(@keyword_tvi, $line);
> +		    }
> +		}
> +	    }
> +	}
> +    } else {
> +	my $file_cnt = @files;
> +	my $lastfile;
> +
> +	open(my $patch, "< $file")
> +	    or die "$P: Can't open $file: $!\n";
> +
> +	# We can check arbitrary information before the patch
> +	# like the commit message, mail headers, etc...
> +	# This allows us to match arbitrary keywords against any part
> +	# of a git format-patch generated file (subject tags, etc...)
> +
> +	my $patch_prefix = "";			#Parsing the intro
> +
> +	while (<$patch>) {
> +	    my $patch_line = $_;
> +	    if (m/^ mode change [0-7]+ => [0-7]+ (\S+)\s*$/) {
> +		my $filename = $1;
> +		push(@files, $filename);
> +	    } elsif (m/^rename (?:from|to) (\S+)\s*$/) {
> +		my $filename = $1;
> +		push(@files, $filename);
> +	    } elsif (m/^diff --git a\/(\S+) b\/(\S+)\s*$/) {
> +		my $filename1 = $1;
> +		my $filename2 = $2;
> +		push(@files, $filename1);
> +		push(@files, $filename2);
> +	    } elsif (m/^Fixes:\s+([0-9a-fA-F]{6,40})/) {
> +		push(@fixes, $1) if ($email_fixes);
> +	    } elsif (m/^\+\+\+\s+(\S+)/ or m/^---\s+(\S+)/) {
> +		my $filename = $1;
> +		$filename =~ s@^[^/]*/@@;
> +		$filename =~ s@\n@@;
> +		$lastfile = $filename;
> +		push(@files, $filename);
> +		$patch_prefix = "^[+-].*";	#Now parsing the actual patch
> +	    } elsif (m/^\@\@ -(\d+),(\d+)/) {
> +		if ($email_git_blame) {
> +		    push(@range, "$lastfile:$1:$2");
> +		}
> +	    } elsif ($keywords) {
> +		foreach my $line (keys %keyword_hash) {
> +		    if ($patch_line =~ m/${patch_prefix}$keyword_hash{$line}/x) {
> +			push(@keyword_tvi, $line);
> +		    }
> +		}
> +	    }
> +	}
> +	close($patch);
> +
> +	if ($file_cnt == @files) {
> +	    warn "$P: file '${file}' doesn't appear to be a patch.  "
> +		. "Add -f to options?\n";
> +	}
> +	@files = sort_and_uniq(@files);
> +    }
> +}
> +
> +@...e_emails = uniq(@file_emails);
> +@...es = uniq(@fixes);
> +
> +my %email_hash_name;
> +my %email_hash_address;
> +my @email_to = ();
> +my %hash_list_to;
> +my @list_to = ();
> +my @scm = ();
> +my @web = ();
> +my @subsystem = ();
> +my @status = ();
> +my %deduplicate_name_hash = ();
> +my %deduplicate_address_hash = ();
> +
> +my @maintainers = get_maintainers();
> +if (@maintainers) {
> +    @maintainers = merge_email(@maintainers);
> +    output(@maintainers);
> +}
> +
> +if ($scm) {
> +    @scm = uniq(@scm);
> +    output(@scm);
> +}
> +
> +if ($status) {
> +    @status = uniq(@status);
> +    output(@status);
> +}
> +
> +if ($subsystem) {
> +    @subsystem = uniq(@subsystem);
> +    output(@subsystem);
> +}
> +
> +if ($web) {
> +    @web = uniq(@web);
> +    output(@web);
> +}
> +
> +exit($exit);
> +
> +sub self_test {
> +    my @lsfiles = ();
> +    my @good_links = ();
> +    my @bad_links = ();
> +    my @section_headers = ();
> +    my $index = 0;
> +
> +    @lsfiles = vcs_list_files($lk_path);
> +
> +    for my $x (@self_test_info) {
> +	$index++;
> +
> +	## Section header duplication and missing section content
> +	if (($self_test eq "" || $self_test =~ /\bsections\b/) &&
> +	    $x->{line} =~ /^\S[^:]/ &&
> +	    defined $self_test_info[$index] &&
> +	    $self_test_info[$index]->{line} =~ /^([A-Z]):\s*\S/) {
> +	    my $has_S = 0;
> +	    my $has_F = 0;
> +	    my $has_ML = 0;
> +	    my $status = "";
> +	    if (grep(m@^\Q$x->{line}\E@, @section_headers)) {
> +		print("$x->{file}:$x->{linenr}: warning: duplicate section header\t$x->{line}\n");
> +	    } else {
> +		push(@section_headers, $x->{line});
> +	    }
> +	    my $nextline = $index;
> +	    while (defined $self_test_info[$nextline] &&
> +		   $self_test_info[$nextline]->{line} =~ /^([A-Z]):\s*(\S.*)/) {
> +		my $type = $1;
> +		my $value = $2;
> +		if ($type eq "S") {
> +		    $has_S = 1;
> +		    $status = $value;
> +		} elsif ($type eq "F" || $type eq "N") {
> +		    $has_F = 1;
> +		} elsif ($type eq "M" || $type eq "R" || $type eq "L") {
> +		    $has_ML = 1;
> +		}
> +		$nextline++;
> +	    }
> +	    if (!$has_ML && $status !~ /orphan|obsolete/i) {
> +		print("$x->{file}:$x->{linenr}: warning: section without email address\t$x->{line}\n");
> +	    }
> +	    if (!$has_S) {
> +		print("$x->{file}:$x->{linenr}: warning: section without status \t$x->{line}\n");
> +	    }
> +	    if (!$has_F) {
> +		print("$x->{file}:$x->{linenr}: warning: section without file pattern\t$x->{line}\n");
> +	    }
> +	}
> +
> +	next if ($x->{line} !~ /^([A-Z]):\s*(.*)/);
> +
> +	my $type = $1;
> +	my $value = $2;
> +
> +	## Filename pattern matching
> +	if (($type eq "F" || $type eq "X") &&
> +	    ($self_test eq "" || $self_test =~ /\bpatterns\b/)) {
> +	    $value =~ s@\.@\\\.@g;       ##Convert . to \.
> +	    $value =~ s/\*/\.\*/g;       ##Convert * to .*
> +	    $value =~ s/\?/\./g;         ##Convert ? to .
> +	    ##if pattern is a directory and it lacks a trailing slash, add one
> +	    if ((-d $value)) {
> +		$value =~ s@([^/])$@$1/@;
> +	    }
> +	    if (!grep(m@...alue@, @lsfiles)) {
> +		print("$x->{file}:$x->{linenr}: warning: no file matches\t$x->{line}\n");
> +	    }
> +
> +	## Link reachability
> +	} elsif (($type eq "W" || $type eq "Q" || $type eq "B") &&
> +		 $value =~ /^https?:/ &&
> +		 ($self_test eq "" || $self_test =~ /\blinks\b/)) {
> +	    next if (grep(m@^\Q$value\E$@, @good_links));
> +	    my $isbad = 0;
> +	    if (grep(m@^\Q$value\E$@, @bad_links)) {
> +	        $isbad = 1;
> +	    } else {
> +		my $output = `wget --spider -q --no-check-certificate --timeout 10 --tries 1 $value`;
> +		if ($? == 0) {
> +		    push(@good_links, $value);
> +		} else {
> +		    push(@bad_links, $value);
> +		    $isbad = 1;
> +		}
> +	    }
> +	    if ($isbad) {
> +	        print("$x->{file}:$x->{linenr}: warning: possible bad link\t$x->{line}\n");
> +	    }
> +
> +	## SCM reachability
> +	} elsif ($type eq "T" &&
> +		 ($self_test eq "" || $self_test =~ /\bscm\b/)) {
> +	    next if (grep(m@^\Q$value\E$@, @good_links));
> +	    my $isbad = 0;
> +	    if (grep(m@^\Q$value\E$@, @bad_links)) {
> +	        $isbad = 1;
> +            } elsif ($value !~ /^(?:git|quilt|hg)\s+\S/) {
> +		print("$x->{file}:$x->{linenr}: warning: malformed entry\t$x->{line}\n");
> +	    } elsif ($value =~ /^git\s+(\S+)(\s+([^\(]+\S+))?/) {
> +		my $url = $1;
> +		my $branch = "";
> +		$branch = $3 if $3;
> +		my $output = `git ls-remote --exit-code -h "$url" $branch > /dev/null 2>&1`;
> +		if ($? == 0) {
> +		    push(@good_links, $value);
> +		} else {
> +		    push(@bad_links, $value);
> +		    $isbad = 1;
> +		}
> +	    } elsif ($value =~ /^(?:quilt|hg)\s+(https?:\S+)/) {
> +		my $url = $1;
> +		my $output = `wget --spider -q --no-check-certificate --timeout 10 --tries 1 $url`;
> +		if ($? == 0) {
> +		    push(@good_links, $value);
> +		} else {
> +		    push(@bad_links, $value);
> +		    $isbad = 1;
> +		}
> +	    }
> +	    if ($isbad) {
> +		print("$x->{file}:$x->{linenr}: warning: possible bad link\t$x->{line}\n");
> +	    }
> +	}
> +    }
> +}
> +
> +sub ignore_email_address {
> +    my ($address) = @_;
> +
> +    foreach my $ignore (@ignore_emails) {
> +	return 1 if ($ignore eq $address);
> +    }
> +
> +    return 0;
> +}
> +
> +sub range_is_maintained {
> +    my ($start, $end) = @_;
> +
> +    for (my $i = $start; $i < $end; $i++) {
> +	my $line = $typevalue[$i];
> +	if ($line =~ m/^([A-Z]):\s*(.*)/) {
> +	    my $type = $1;
> +	    my $value = $2;
> +	    if ($type eq 'S') {
> +		if ($value =~ /(maintain|support)/i) {
> +		    return 1;
> +		}
> +	    }
> +	}
> +    }
> +    return 0;
> +}
> +
> +sub range_has_maintainer {
> +    my ($start, $end) = @_;
> +
> +    for (my $i = $start; $i < $end; $i++) {
> +	my $line = $typevalue[$i];
> +	if ($line =~ m/^([A-Z]):\s*(.*)/) {
> +	    my $type = $1;
> +	    my $value = $2;
> +	    if ($type eq 'M') {
> +		return 1;
> +	    }
> +	}
> +    }
> +    return 0;
> +}
> +
> +sub get_maintainers {
> +    %email_hash_name = ();
> +    %email_hash_address = ();
> +    %commit_author_hash = ();
> +    %commit_signer_hash = ();
> +    @email_to = ();
> +    %hash_list_to = ();
> +    @list_to = ();
> +    @scm = ();
> +    @web = ();
> +    @subsystem = ();
> +    @status = ();
> +    %deduplicate_name_hash = ();
> +    %deduplicate_address_hash = ();
> +    if ($email_git_all_signature_types) {
> +	$signature_pattern = "(.+?)[Bb][Yy]:";
> +    } else {
> +	$signature_pattern = "\(" . join("|", @signature_tags) . "\)";
> +    }
> +
> +    # Find responsible parties
> +
> +    my %exact_pattern_match_hash = ();
> +
> +    foreach my $file (@files) {
> +
> +	my %hash;
> +	my $tvi = find_first_section();
> +	while ($tvi < @typevalue) {
> +	    my $start = find_starting_index($tvi);
> +	    my $end = find_ending_index($tvi);
> +	    my $exclude = 0;
> +	    my $i;
> +
> +	    #Do not match excluded file patterns
> +
> +	    for ($i = $start; $i < $end; $i++) {
> +		my $line = $typevalue[$i];
> +		if ($line =~ m/^([A-Z]):\s*(.*)/) {
> +		    my $type = $1;
> +		    my $value = $2;
> +		    if ($type eq 'X') {
> +			if (file_match_pattern($file, $value)) {
> +			    $exclude = 1;
> +			    last;
> +			}
> +		    }
> +		}
> +	    }
> +
> +	    if (!$exclude) {
> +		for ($i = $start; $i < $end; $i++) {
> +		    my $line = $typevalue[$i];
> +		    if ($line =~ m/^([A-Z]):\s*(.*)/) {
> +			my $type = $1;
> +			my $value = $2;
> +			if ($type eq 'F') {
> +			    if (file_match_pattern($file, $value)) {
> +				my $value_pd = ($value =~ tr@/@@);
> +				my $file_pd = ($file  =~ tr@/@@);
> +				$value_pd++ if (substr($value,-1,1) ne "/");
> +				$value_pd = -1 if ($value =~ /^\.\*/);
> +				if ($value_pd >= $file_pd &&
> +				    range_is_maintained($start, $end) &&
> +				    range_has_maintainer($start, $end)) {
> +				    $exact_pattern_match_hash{$file} = 1;
> +				}
> +				if ($pattern_depth == 0 ||
> +				    (($file_pd - $value_pd) < $pattern_depth)) {
> +				    $hash{$tvi} = $value_pd;
> +				}
> +			    }
> +			} elsif ($type eq 'N') {
> +			    if ($file =~ m/$value/x) {
> +				$hash{$tvi} = 0;
> +			    }
> +			}
> +		    }
> +		}
> +	    }
> +	    $tvi = $end + 1;
> +	}
> +
> +	foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
> +	    add_categories($line);
> +	    if ($sections) {
> +		my $i;
> +		my $start = find_starting_index($line);
> +		my $end = find_ending_index($line);
> +		for ($i = $start; $i < $end; $i++) {
> +		    my $line = $typevalue[$i];
> +		    if ($line =~ /^[FX]:/) {		##Restore file patterns
> +			$line =~ s/([^\\])\.([^\*])/$1\?$2/g;
> +			$line =~ s/([^\\])\.$/$1\?/g;	##Convert . back to ?
> +			$line =~ s/\\\./\./g;       	##Convert \. to .
> +			$line =~ s/\.\*/\*/g;       	##Convert .* to *
> +		    }
> +		    my $count = $line =~ s/^([A-Z]):/$1:\t/g;
> +		    if ($letters eq "" || (!$count || $letters =~ /$1/i)) {
> +			print("$line\n");
> +		    }
> +		}
> +		print("\n");
> +	    }
> +	}
> +
> +	maintainers_in_file($file);
> +    }
> +
> +    if ($keywords) {
> +	@keyword_tvi = sort_and_uniq(@keyword_tvi);
> +	foreach my $line (@keyword_tvi) {
> +	    add_categories($line);
> +	}
> +    }
> +
> +    foreach my $email (@email_to, @list_to) {
> +	$email->[0] = deduplicate_email($email->[0]);
> +    }
> +
> +    foreach my $file (@files) {
> +	if ($email &&
> +	    ($email_git ||
> +	     ($email_git_fallback &&
> +	      $file !~ /MAINTAINERS$/ &&
> +	      !$exact_pattern_match_hash{$file}))) {
> +	    vcs_file_signoffs($file);
> +	}
> +	if ($email && $email_git_blame) {
> +	    vcs_file_blame($file);
> +	}
> +    }
> +
> +    if ($email) {
> +	foreach my $chief (@penguin_chief) {
> +	    if ($chief =~ m/^(.*):(.*)/) {
> +		my $email_address;
> +
> +		$email_address = format_email($1, $2, $email_usename);
> +		if ($email_git_penguin_chiefs) {
> +		    push(@email_to, [$email_address, 'chief penguin']);
> +		} else {
> +		    @email_to = grep($_->[0] !~ /${email_address}/, @email_to);
> +		}
> +	    }
> +	}
> +
> +	foreach my $email (@file_emails) {
> +	    $email = mailmap_email($email);
> +	    my ($name, $address) = parse_email($email);
> +
> +	    my $tmp_email = format_email($name, $address, $email_usename);
> +	    push_email_address($tmp_email, '');
> +	    add_role($tmp_email, 'in file');
> +	}
> +    }
> +
> +    foreach my $fix (@fixes) {
> +	vcs_add_commit_signers($fix, "blamed_fixes");
> +    }
> +
> +    my @to = ();
> +    if ($email || $email_list) {
> +	if ($email) {
> +	    @to = (@to, @email_to);
> +	}
> +	if ($email_list) {
> +	    @to = (@to, @list_to);
> +	}
> +    }
> +
> +    if ($interactive) {
> +	@to = interactive_get_maintainers(\@to);
> +    }
> +
> +    return @to;
> +}
> +
> +sub file_match_pattern {
> +    my ($file, $pattern) = @_;
> +    if (substr($pattern, -1) eq "/") {
> +	if ($file =~ m@...attern@) {
> +	    return 1;
> +	}
> +    } else {
> +	if ($file =~ m@...attern@) {
> +	    my $s1 = ($file =~ tr@/@@);
> +	    my $s2 = ($pattern =~ tr@/@@);
> +	    if ($s1 == $s2) {
> +		return 1;
> +	    }
> +	}
> +    }
> +    return 0;
> +}
> +
> +sub usage {
> +    print <<EOT;
> +usage: $P [options] patchfile
> +       $P [options] -f file|directory
> +version: $V
> +
> +MAINTAINER field selection options:
> +  --email => print email address(es) if any
> +    --git => include recent git \*-by: signers
> +    --git-all-signature-types => include signers regardless of signature type
> +        or use only ${signature_pattern} signers (default: $email_git_all_signature_types)
> +    --git-fallback => use git when no exact MAINTAINERS pattern (default: $email_git_fallback)
> +    --git-chief-penguins => include ${penguin_chiefs}
> +    --git-min-signatures => number of signatures required (default: $email_git_min_signatures)
> +    --git-max-maintainers => maximum maintainers to add (default: $email_git_max_maintainers)
> +    --git-min-percent => minimum percentage of commits required (default: $email_git_min_percent)
> +    --git-blame => use git blame to find modified commits for patch or file
> +    --git-blame-signatures => when used with --git-blame, also include all commit signers
> +    --git-since => git history to use (default: $email_git_since)
> +    --hg-since => hg history to use (default: $email_hg_since)
> +    --interactive => display a menu (mostly useful if used with the --git option)
> +    --m => include maintainer(s) if any
> +    --r => include reviewer(s) if any
> +    --n => include name 'Full Name <addr\@domain.tld>'
> +    --l => include list(s) if any
> +    --moderated => include moderated lists(s) if any (default: true)
> +    --s => include subscriber only list(s) if any (default: false)
> +    --remove-duplicates => minimize duplicate email names/addresses
> +    --roles => show roles (status:subsystem, git-signer, list, etc...)
> +    --rolestats => show roles and statistics (commits/total_commits, %)
> +    --file-emails => add email addresses found in -f file (default: 0 (off))
> +    --fixes => for patches, add signatures of commits with 'Fixes: <commit>' (default: 1 (on))
> +  --scm => print SCM tree(s) if any
> +  --status => print status if any
> +  --subsystem => print subsystem name if any
> +  --web => print website(s) if any
> +
> +Output type options:
> +  --separator [, ] => separator for multiple entries on 1 line
> +    using --separator also sets --nomultiline if --separator is not [, ]
> +  --multiline => print 1 entry per line
> +
> +Other options:
> +  --pattern-depth => Number of pattern directory traversals (default: 0 (all))
> +  --keywords => scan patch for keywords (default: $keywords)
> +  --sections => print all of the subsystem sections with pattern matches
> +  --letters => print all matching 'letter' types from all matching sections
> +  --mailmap => use .mailmap file (default: $email_use_mailmap)
> +  --no-tree => run without a kernel tree
> +  --self-test => show potential issues with MAINTAINERS file content
> +  --version => show version
> +  --help => show this help information
> +
> +Default options:
> +  [--email --tree --nogit --git-fallback --m --r --n --l --multiline
> +   --pattern-depth=0 --remove-duplicates --rolestats]
> +
> +Notes:
> +  Using "-f directory" may give unexpected results:
> +      Used with "--git", git signators for _all_ files in and below
> +          directory are examined as git recurses directories.
> +          Any specified X: (exclude) pattern matches are _not_ ignored.
> +      Used with "--nogit", directory is used as a pattern match,
> +          no individual file within the directory or subdirectory
> +          is matched.
> +      Used with "--git-blame", does not iterate all files in directory
> +  Using "--git-blame" is slow and may add old committers and authors
> +      that are no longer active maintainers to the output.
> +  Using "--roles" or "--rolestats" with git send-email --cc-cmd or any
> +      other automated tools that expect only ["name"] <email address>
> +      may not work because of additional output after <email address>.
> +  Using "--rolestats" and "--git-blame" shows the #/total=% commits,
> +      not the percentage of the entire file authored.  # of commits is
> +      not a good measure of amount of code authored.  1 major commit may
> +      contain a thousand lines, 5 trivial commits may modify a single line.
> +  If git is not installed, but mercurial (hg) is installed and an .hg
> +      repository exists, the following options apply to mercurial:
> +          --git,
> +          --git-min-signatures, --git-max-maintainers, --git-min-percent, and
> +          --git-blame
> +      Use --hg-since not --git-since to control date selection
> +  File ".get_maintainer.conf", if it exists in the fstests source root
> +      directory, can change whatever get_maintainer defaults are desired.
> +      Entries in this file can be any command line argument.
> +      This file is prepended to any additional command line arguments.
> +      Multiple lines and # comments are allowed.
> +  Most options have both positive and negative forms.
> +      The negative forms for --<foo> are --no<foo> and --no-<foo>.
> +
> +EOT
> +}
> +
> +sub top_of_fstests_tree {
> +    my ($lk_path) = @_;
> +
> +    if ($lk_path ne "" && substr($lk_path,length($lk_path)-1,1) ne "/") {
> +	$lk_path .= "/";
> +    }
> +    if (   (-f "${lk_path}check")
> +	&& (-f "${lk_path}local.config.example")
> +	&& (-e "${lk_path}MAINTAINERS")
> +	&& (-f "${lk_path}Makefile")
> +	&& (-f "${lk_path}README")
> +	&& (-f "${lk_path}new")
> +	&& (-d "${lk_path}LICENSES")
> +	&& (-d "${lk_path}tests")
> +	&& (-d "${lk_path}common")
> +	&& (-d "${lk_path}src")
> +	&& (-d "${lk_path}tools")
> +	&& (-d "${lk_path}include")
> +	&& (-d "${lk_path}m4")
> +	&& (-d "${lk_path}lib")
> +	&& (-d "${lk_path}doc")) {
> +	return 1;
> +    }
> +    return 0;
> +}
> +
> +sub parse_email {
> +    my ($formatted_email) = @_;
> +
> +    my $name = "";
> +    my $address = "";
> +
> +    if ($formatted_email =~ /^([^<]+)<(.+\@.*)>.*$/) {
> +	$name = $1;
> +	$address = $2;
> +    } elsif ($formatted_email =~ /^\s*<(.+\@\S*)>.*$/) {
> +	$address = $1;
> +    } elsif ($formatted_email =~ /^(.+\@\S*).*$/) {
> +	$address = $1;
> +    }
> +
> +    $name =~ s/^\s+|\s+$//g;
> +    $name =~ s/^\"|\"$//g;
> +    $address =~ s/^\s+|\s+$//g;
> +
> +    if ($name =~ /[^\w \-]/i) {  	 ##has "must quote" chars
> +	$name =~ s/(?<!\\)"/\\"/g;       ##escape quotes
> +	$name = "\"$name\"";
> +    }
> +
> +    return ($name, $address);
> +}
> +
> +sub format_email {
> +    my ($name, $address, $usename) = @_;
> +
> +    my $formatted_email;
> +
> +    $name =~ s/^\s+|\s+$//g;
> +    $name =~ s/^\"|\"$//g;
> +    $address =~ s/^\s+|\s+$//g;
> +
> +    if ($name =~ /[^\w \-]/i) {          ##has "must quote" chars
> +	$name =~ s/(?<!\\)"/\\"/g;       ##escape quotes
> +	$name = "\"$name\"";
> +    }
> +
> +    if ($usename) {
> +	if ("$name" eq "") {
> +	    $formatted_email = "$address";
> +	} else {
> +	    $formatted_email = "$name <$address>";
> +	}
> +    } else {
> +	$formatted_email = $address;
> +    }
> +
> +    return $formatted_email;
> +}
> +
> +sub find_first_section {
> +    my $index = 0;
> +
> +    while ($index < @typevalue) {
> +	my $tv = $typevalue[$index];
> +	if (($tv =~ m/^([A-Z]):\s*(.*)/)) {
> +	    last;
> +	}
> +	$index++;
> +    }
> +
> +    return $index;
> +}
> +
> +sub find_starting_index {
> +    my ($index) = @_;
> +
> +    while ($index > 0) {
> +	my $tv = $typevalue[$index];
> +	if (!($tv =~ m/^([A-Z]):\s*(.*)/)) {
> +	    last;
> +	}
> +	$index--;
> +    }
> +
> +    return $index;
> +}
> +
> +sub find_ending_index {
> +    my ($index) = @_;
> +
> +    while ($index < @typevalue) {
> +	my $tv = $typevalue[$index];
> +	if (!($tv =~ m/^([A-Z]):\s*(.*)/)) {
> +	    last;
> +	}
> +	$index++;
> +    }
> +
> +    return $index;
> +}
> +
> +sub get_subsystem_name {
> +    my ($index) = @_;
> +
> +    my $start = find_starting_index($index);
> +
> +    my $subsystem = $typevalue[$start];
> +    if ($output_section_maxlen && length($subsystem) > $output_section_maxlen) {
> +	$subsystem = substr($subsystem, 0, $output_section_maxlen - 3);
> +	$subsystem =~ s/\s*$//;
> +	$subsystem = $subsystem . "...";
> +    }
> +    return $subsystem;
> +}
> +
> +sub get_maintainer_role {
> +    my ($index) = @_;
> +
> +    my $i;
> +    my $start = find_starting_index($index);
> +    my $end = find_ending_index($index);
> +
> +    my $role = "unknown";
> +    my $subsystem = get_subsystem_name($index);
> +
> +    for ($i = $start + 1; $i < $end; $i++) {
> +	my $tv = $typevalue[$i];
> +	if ($tv =~ m/^([A-Z]):\s*(.*)/) {
> +	    my $ptype = $1;
> +	    my $pvalue = $2;
> +	    if ($ptype eq "S") {
> +		$role = $pvalue;
> +	    }
> +	}
> +    }
> +
> +    $role = lc($role);
> +    if      ($role eq "supported") {
> +	$role = "supporter";
> +    } elsif ($role eq "maintained") {
> +	$role = "maintainer";
> +    } elsif ($role eq "odd fixes") {
> +	$role = "odd fixer";
> +    } elsif ($role eq "orphan") {
> +	$role = "orphan minder";
> +    } elsif ($role eq "obsolete") {
> +	$role = "obsolete minder";
> +    } elsif ($role eq "buried alive in reporters") {
> +	$role = "chief penguin";
> +    }
> +
> +    return $role . ":" . $subsystem;
> +}
> +
> +sub get_list_role {
> +    my ($index) = @_;
> +
> +    my $subsystem = get_subsystem_name($index);
> +
> +    if ($subsystem eq "ALL") {
> +	$subsystem = "Send To Me";
> +    }
> +
> +    return $subsystem;
> +}
> +
> +sub add_categories {
> +    my ($index) = @_;
> +
> +    my $i;
> +    my $start = find_starting_index($index);
> +    my $end = find_ending_index($index);
> +
> +    push(@subsystem, $typevalue[$start]);
> +
> +    for ($i = $start + 1; $i < $end; $i++) {
> +	my $tv = $typevalue[$i];
> +	if ($tv =~ m/^([A-Z]):\s*(.*)/) {
> +	    my $ptype = $1;
> +	    my $pvalue = $2;
> +	    if ($ptype eq "L") {
> +		my $list_address = $pvalue;
> +		my $list_additional = "";
> +		my $list_role = get_list_role($i);
> +
> +		if ($list_role ne "") {
> +		    $list_role = ":" . $list_role;
> +		}
> +		if ($list_address =~ m/([^\s]+)\s+(.*)$/) {
> +		    $list_address = $1;
> +		    $list_additional = $2;
> +		}
> +		if ($list_additional =~ m/subscribers-only/) {
> +		    if ($email_subscriber_list) {
> +			if (!$hash_list_to{lc($list_address)}) {
> +			    $hash_list_to{lc($list_address)} = 1;
> +			    push(@list_to, [$list_address,
> +					    "subscriber list${list_role}"]);
> +			}
> +		    }
> +		} else {
> +		    if ($email_list) {
> +			if (!$hash_list_to{lc($list_address)}) {
> +			    if ($list_additional =~ m/moderated/) {
> +				if ($email_moderated_list) {
> +				    $hash_list_to{lc($list_address)} = 1;
> +				    push(@list_to, [$list_address,
> +						    "moderated list${list_role}"]);
> +				}
> +			    } else {
> +				$hash_list_to{lc($list_address)} = 1;
> +				push(@list_to, [$list_address,
> +						"open list${list_role}"]);
> +			    }
> +			}
> +		    }
> +		}
> +	    } elsif ($ptype eq "M") {
> +		if ($email_maintainer) {
> +		    my $role = get_maintainer_role($i);
> +		    push_email_addresses($pvalue, $role);
> +		}
> +	    } elsif ($ptype eq "R") {
> +		if ($email_reviewer) {
> +		    my $subsystem = get_subsystem_name($i);
> +		    push_email_addresses($pvalue, "reviewer:$subsystem");
> +		}
> +	    } elsif ($ptype eq "T") {
> +		push(@scm, $pvalue);
> +	    } elsif ($ptype eq "W") {
> +		push(@web, $pvalue);
> +	    } elsif ($ptype eq "S") {
> +		push(@status, $pvalue);
> +	    }
> +	}
> +    }
> +}
> +
> +sub email_inuse {
> +    my ($name, $address) = @_;
> +
> +    return 1 if (($name eq "") && ($address eq ""));
> +    return 1 if (($name ne "") && exists($email_hash_name{lc($name)}));
> +    return 1 if (($address ne "") && exists($email_hash_address{lc($address)}));
> +
> +    return 0;
> +}
> +
> +sub push_email_address {
> +    my ($line, $role) = @_;
> +
> +    my ($name, $address) = parse_email($line);
> +
> +    if ($address eq "") {
> +	return 0;
> +    }
> +
> +    if (!$email_remove_duplicates) {
> +	push(@email_to, [format_email($name, $address, $email_usename), $role]);
> +    } elsif (!email_inuse($name, $address)) {
> +	push(@email_to, [format_email($name, $address, $email_usename), $role]);
> +	$email_hash_name{lc($name)}++ if ($name ne "");
> +	$email_hash_address{lc($address)}++;
> +    }
> +
> +    return 1;
> +}
> +
> +sub push_email_addresses {
> +    my ($address, $role) = @_;
> +
> +    my @address_list = ();
> +
> +    if (rfc822_valid($address)) {
> +	push_email_address($address, $role);
> +    } elsif (@address_list = rfc822_validlist($address)) {
> +	my $array_count = shift(@address_list);
> +	while (my $entry = shift(@address_list)) {
> +	    push_email_address($entry, $role);
> +	}
> +    } else {
> +	if (!push_email_address($address, $role)) {
> +	    warn("Invalid MAINTAINERS address: '" . $address . "'\n");
> +	}
> +    }
> +}
> +
> +sub add_role {
> +    my ($line, $role) = @_;
> +
> +    my ($name, $address) = parse_email($line);
> +    my $email = format_email($name, $address, $email_usename);
> +
> +    foreach my $entry (@email_to) {
> +	if ($email_remove_duplicates) {
> +	    my ($entry_name, $entry_address) = parse_email($entry->[0]);
> +	    if (($name eq $entry_name || $address eq $entry_address)
> +		&& ($role eq "" || !($entry->[1] =~ m/$role/))
> +	    ) {
> +		if ($entry->[1] eq "") {
> +		    $entry->[1] = "$role";
> +		} else {
> +		    $entry->[1] = "$entry->[1],$role";
> +		}
> +	    }
> +	} else {
> +	    if ($email eq $entry->[0]
> +		&& ($role eq "" || !($entry->[1] =~ m/$role/))
> +	    ) {
> +		if ($entry->[1] eq "") {
> +		    $entry->[1] = "$role";
> +		} else {
> +		    $entry->[1] = "$entry->[1],$role";
> +		}
> +	    }
> +	}
> +    }
> +}
> +
> +sub which {
> +    my ($bin) = @_;
> +
> +    foreach my $path (split(/:/, $ENV{PATH})) {
> +	if (-e "$path/$bin") {
> +	    return "$path/$bin";
> +	}
> +    }
> +
> +    return "";
> +}
> +
> +sub which_conf {
> +    my ($conf) = @_;
> +
> +    foreach my $path (split(/:/, ".:$ENV{HOME}:.scripts")) {
> +	if (-e "$path/$conf") {
> +	    return "$path/$conf";
> +	}
> +    }
> +
> +    return "";
> +}
> +
> +sub mailmap_email {
> +    my ($line) = @_;
> +
> +    my ($name, $address) = parse_email($line);
> +    my $email = format_email($name, $address, 1);
> +    my $real_name = $name;
> +    my $real_address = $address;
> +
> +    if (exists $mailmap->{names}->{$email} ||
> +	exists $mailmap->{addresses}->{$email}) {
> +	if (exists $mailmap->{names}->{$email}) {
> +	    $real_name = $mailmap->{names}->{$email};
> +	}
> +	if (exists $mailmap->{addresses}->{$email}) {
> +	    $real_address = $mailmap->{addresses}->{$email};
> +	}
> +    } else {
> +	if (exists $mailmap->{names}->{$address}) {
> +	    $real_name = $mailmap->{names}->{$address};
> +	}
> +	if (exists $mailmap->{addresses}->{$address}) {
> +	    $real_address = $mailmap->{addresses}->{$address};
> +	}
> +    }
> +    return format_email($real_name, $real_address, 1);
> +}
> +
> +sub mailmap {
> +    my (@addresses) = @_;
> +
> +    my @mapped_emails = ();
> +    foreach my $line (@addresses) {
> +	push(@mapped_emails, mailmap_email($line));
> +    }
> +    merge_by_realname(@mapped_emails) if ($email_use_mailmap);
> +    return @mapped_emails;
> +}
> +
> +sub merge_by_realname {
> +    my %address_map;
> +    my (@emails) = @_;
> +
> +    foreach my $email (@emails) {
> +	my ($name, $address) = parse_email($email);
> +	if (exists $address_map{$name}) {
> +	    $address = $address_map{$name};
> +	    $email = format_email($name, $address, 1);
> +	} else {
> +	    $address_map{$name} = $address;
> +	}
> +    }
> +}
> +
> +sub git_execute_cmd {
> +    my ($cmd) = @_;
> +    my @lines = ();
> +
> +    my $output = `$cmd`;
> +    $output =~ s/^\s*//gm;
> +    @lines = split("\n", $output);
> +
> +    return @lines;
> +}
> +
> +sub hg_execute_cmd {
> +    my ($cmd) = @_;
> +    my @lines = ();
> +
> +    my $output = `$cmd`;
> +    @lines = split("\n", $output);
> +
> +    return @lines;
> +}
> +
> +sub extract_formatted_signatures {
> +    my (@signature_lines) = @_;
> +
> +    my @type = @signature_lines;
> +
> +    s/\s*(.*):.*/$1/ for (@type);
> +
> +    # cut -f2- -d":"
> +    s/\s*.*:\s*(.+)\s*/$1/ for (@signature_lines);
> +
> +## Reformat email addresses (with names) to avoid badly written signatures
> +
> +    foreach my $signer (@signature_lines) {
> +	$signer = deduplicate_email($signer);
> +    }
> +
> +    return (\@type, \@signature_lines);
> +}
> +
> +sub vcs_find_signers {
> +    my ($cmd, $file) = @_;
> +    my $commits;
> +    my @lines = ();
> +    my @signatures = ();
> +    my @authors = ();
> +    my @stats = ();
> +
> +    @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
> +
> +    my $pattern = $VCS_cmds{"commit_pattern"};
> +    my $author_pattern = $VCS_cmds{"author_pattern"};
> +    my $stat_pattern = $VCS_cmds{"stat_pattern"};
> +
> +    $stat_pattern =~ s/(\$\w+)/$1/eeg;		#interpolate $stat_pattern
> +
> +    $commits = grep(/$pattern/, @lines);	# of commits
> +
> +    @authors = grep(/$author_pattern/, @lines);
> +    @signatures = grep(/^[ \t]*${signature_pattern}.*\@.*$/, @lines);
> +    @stats = grep(/$stat_pattern/, @lines);
> +
> +#    print("stats: <@stats>\n");
> +
> +    return (0, \@signatures, \@authors, \@stats) if !@...natures;
> +
> +    save_commits_by_author(@lines) if ($interactive);
> +    save_commits_by_signer(@lines) if ($interactive);
> +
> +    if (!$email_git_penguin_chiefs) {
> +	@signatures = grep(!/${penguin_chiefs}/i, @signatures);
> +    }
> +
> +    my ($author_ref, $authors_ref) = extract_formatted_signatures(@authors);
> +    my ($types_ref, $signers_ref) = extract_formatted_signatures(@signatures);
> +
> +    return ($commits, $signers_ref, $authors_ref, \@stats);
> +}
> +
> +sub vcs_find_author {
> +    my ($cmd) = @_;
> +    my @lines = ();
> +
> +    @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
> +
> +    if (!$email_git_penguin_chiefs) {
> +	@lines = grep(!/${penguin_chiefs}/i, @lines);
> +    }
> +
> +    return @lines if !@...es;
> +
> +    my @authors = ();
> +    foreach my $line (@lines) {
> +	if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
> +	    my $author = $1;
> +	    my ($name, $address) = parse_email($author);
> +	    $author = format_email($name, $address, 1);
> +	    push(@authors, $author);
> +	}
> +    }
> +
> +    save_commits_by_author(@lines) if ($interactive);
> +    save_commits_by_signer(@lines) if ($interactive);
> +
> +    return @authors;
> +}
> +
> +sub vcs_save_commits {
> +    my ($cmd) = @_;
> +    my @lines = ();
> +    my @commits = ();
> +
> +    @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
> +
> +    foreach my $line (@lines) {
> +	if ($line =~ m/$VCS_cmds{"blame_commit_pattern"}/) {
> +	    push(@commits, $1);
> +	}
> +    }
> +
> +    return @commits;
> +}
> +
> +sub vcs_blame {
> +    my ($file) = @_;
> +    my $cmd;
> +    my @commits = ();
> +
> +    return @commits if (!(-f $file));
> +
> +    if (@range && $VCS_cmds{"blame_range_cmd"} eq "") {
> +	my @all_commits = ();
> +
> +	$cmd = $VCS_cmds{"blame_file_cmd"};
> +	$cmd =~ s/(\$\w+)/$1/eeg;		#interpolate $cmd
> +	@all_commits = vcs_save_commits($cmd);
> +
> +	foreach my $file_range_diff (@range) {
> +	    next if (!($file_range_diff =~ m/(.+):(.+):(.+)/));
> +	    my $diff_file = $1;
> +	    my $diff_start = $2;
> +	    my $diff_length = $3;
> +	    next if ("$file" ne "$diff_file");
> +	    for (my $i = $diff_start; $i < $diff_start + $diff_length; $i++) {
> +		push(@commits, $all_commits[$i]);
> +	    }
> +	}
> +    } elsif (@range) {
> +	foreach my $file_range_diff (@range) {
> +	    next if (!($file_range_diff =~ m/(.+):(.+):(.+)/));
> +	    my $diff_file = $1;
> +	    my $diff_start = $2;
> +	    my $diff_length = $3;
> +	    next if ("$file" ne "$diff_file");
> +	    $cmd = $VCS_cmds{"blame_range_cmd"};
> +	    $cmd =~ s/(\$\w+)/$1/eeg;		#interpolate $cmd
> +	    push(@commits, vcs_save_commits($cmd));
> +	}
> +    } else {
> +	$cmd = $VCS_cmds{"blame_file_cmd"};
> +	$cmd =~ s/(\$\w+)/$1/eeg;		#interpolate $cmd
> +	@commits = vcs_save_commits($cmd);
> +    }
> +
> +    foreach my $commit (@commits) {
> +	$commit =~ s/^\^//g;
> +    }
> +
> +    return @commits;
> +}
> +
> +my $printed_novcs = 0;
> +sub vcs_exists {
> +    %VCS_cmds = %VCS_cmds_git;
> +    return 1 if eval $VCS_cmds{"available"};
> +    %VCS_cmds = %VCS_cmds_hg;
> +    return 2 if eval $VCS_cmds{"available"};
> +    %VCS_cmds = ();
> +    if (!$printed_novcs && $email_git) {
> +	warn("$P: No supported VCS found.  Add --nogit to options?\n");
> +	warn("Using a git repository produces better results.\n");
> +	warn("Try Linus Torvalds' latest git repository using:\n");
> +	warn("git clone git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git\n");
> +	$printed_novcs = 1;
> +    }
> +    return 0;
> +}
> +
> +sub vcs_is_git {
> +    vcs_exists();
> +    return $vcs_used == 1;
> +}
> +
> +sub vcs_is_hg {
> +    return $vcs_used == 2;
> +}
> +
> +sub vcs_add_commit_signers {
> +    return if (!vcs_exists());
> +
> +    my ($commit, $desc) = @_;
> +    my $commit_count = 0;
> +    my $commit_authors_ref;
> +    my $commit_signers_ref;
> +    my $stats_ref;
> +    my @commit_authors = ();
> +    my @commit_signers = ();
> +    my $cmd;
> +
> +    $cmd = $VCS_cmds{"find_commit_signers_cmd"};
> +    $cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
> +
> +    ($commit_count, $commit_signers_ref, $commit_authors_ref, $stats_ref) = vcs_find_signers($cmd, "");
> +    @commit_authors = @{$commit_authors_ref} if defined $commit_authors_ref;
> +    @commit_signers = @{$commit_signers_ref} if defined $commit_signers_ref;
> +
> +    foreach my $signer (@commit_signers) {
> +	$signer = deduplicate_email($signer);
> +    }
> +
> +    vcs_assign($desc, 1, @commit_signers);
> +}
> +
> +sub interactive_get_maintainers {
> +    my ($list_ref) = @_;
> +    my @list = @$list_ref;
> +
> +    vcs_exists();
> +
> +    my %selected;
> +    my %authored;
> +    my %signed;
> +    my $count = 0;
> +    my $maintained = 0;
> +    foreach my $entry (@list) {
> +	$maintained = 1 if ($entry->[1] =~ /^(maintainer|supporter)/i);
> +	$selected{$count} = 1;
> +	$authored{$count} = 0;
> +	$signed{$count} = 0;
> +	$count++;
> +    }
> +
> +    #menu loop
> +    my $done = 0;
> +    my $print_options = 0;
> +    my $redraw = 1;
> +    while (!$done) {
> +	$count = 0;
> +	if ($redraw) {
> +	    printf STDERR "\n%1s %2s %-65s",
> +			  "*", "#", "email/list and role:stats";
> +	    if ($email_git ||
> +		($email_git_fallback && !$maintained) ||
> +		$email_git_blame) {
> +		print STDERR "auth sign";
> +	    }
> +	    print STDERR "\n";
> +	    foreach my $entry (@list) {
> +		my $email = $entry->[0];
> +		my $role = $entry->[1];
> +		my $sel = "";
> +		$sel = "*" if ($selected{$count});
> +		my $commit_author = $commit_author_hash{$email};
> +		my $commit_signer = $commit_signer_hash{$email};
> +		my $authored = 0;
> +		my $signed = 0;
> +		$authored++ for (@{$commit_author});
> +		$signed++ for (@{$commit_signer});
> +		printf STDERR "%1s %2d %-65s", $sel, $count + 1, $email;
> +		printf STDERR "%4d %4d", $authored, $signed
> +		    if ($authored > 0 || $signed > 0);
> +		printf STDERR "\n     %s\n", $role;
> +		if ($authored{$count}) {
> +		    my $commit_author = $commit_author_hash{$email};
> +		    foreach my $ref (@{$commit_author}) {
> +			print STDERR "     Author: @{$ref}[1]\n";
> +		    }
> +		}
> +		if ($signed{$count}) {
> +		    my $commit_signer = $commit_signer_hash{$email};
> +		    foreach my $ref (@{$commit_signer}) {
> +			print STDERR "     @{$ref}[2]: @{$ref}[1]\n";
> +		    }
> +		}
> +
> +		$count++;
> +	    }
> +	}
> +	my $date_ref = \$email_git_since;
> +	$date_ref = \$email_hg_since if (vcs_is_hg());
> +	if ($print_options) {
> +	    $print_options = 0;
> +	    if (vcs_exists()) {
> +		print STDERR <<EOT
> +
> +Version Control options:
> +g  use git history      [$email_git]
> +gf use git-fallback     [$email_git_fallback]
> +b  use git blame        [$email_git_blame]
> +bs use blame signatures [$email_git_blame_signatures]
> +c# minimum commits      [$email_git_min_signatures]
> +%# min percent          [$email_git_min_percent]
> +d# history to use       [$$date_ref]
> +x# max maintainers      [$email_git_max_maintainers]
> +t  all signature types  [$email_git_all_signature_types]
> +m  use .mailmap         [$email_use_mailmap]
> +EOT
> +	    }
> +	    print STDERR <<EOT
> +
> +Additional options:
> +0  toggle all
> +tm toggle maintainers
> +tg toggle git entries
> +tl toggle open list entries
> +ts toggle subscriber list entries
> +f  emails in file       [$email_file_emails]
> +k  keywords in file     [$keywords]
> +r  remove duplicates    [$email_remove_duplicates]
> +p# pattern match depth  [$pattern_depth]
> +EOT
> +	}
> +	print STDERR
> +"\n#(toggle), A#(author), S#(signed) *(all), ^(none), O(options), Y(approve): ";
> +
> +	my $input = <STDIN>;
> +	chomp($input);
> +
> +	$redraw = 1;
> +	my $rerun = 0;
> +	my @wish = split(/[, ]+/, $input);
> +	foreach my $nr (@wish) {
> +	    $nr = lc($nr);
> +	    my $sel = substr($nr, 0, 1);
> +	    my $str = substr($nr, 1);
> +	    my $val = 0;
> +	    $val = $1 if $str =~ /^(\d+)$/;
> +
> +	    if ($sel eq "y") {
> +		$interactive = 0;
> +		$done = 1;
> +		$output_rolestats = 0;
> +		$output_roles = 0;
> +		last;
> +	    } elsif ($nr =~ /^\d+$/ && $nr > 0 && $nr <= $count) {
> +		$selected{$nr - 1} = !$selected{$nr - 1};
> +	    } elsif ($sel eq "*" || $sel eq '^') {
> +		my $toggle = 0;
> +		$toggle = 1 if ($sel eq '*');
> +		for (my $i = 0; $i < $count; $i++) {
> +		    $selected{$i} = $toggle;
> +		}
> +	    } elsif ($sel eq "0") {
> +		for (my $i = 0; $i < $count; $i++) {
> +		    $selected{$i} = !$selected{$i};
> +		}
> +	    } elsif ($sel eq "t") {
> +		if (lc($str) eq "m") {
> +		    for (my $i = 0; $i < $count; $i++) {
> +			$selected{$i} = !$selected{$i}
> +			    if ($list[$i]->[1] =~ /^(maintainer|supporter)/i);
> +		    }
> +		} elsif (lc($str) eq "g") {
> +		    for (my $i = 0; $i < $count; $i++) {
> +			$selected{$i} = !$selected{$i}
> +			    if ($list[$i]->[1] =~ /^(author|commit|signer)/i);
> +		    }
> +		} elsif (lc($str) eq "l") {
> +		    for (my $i = 0; $i < $count; $i++) {
> +			$selected{$i} = !$selected{$i}
> +			    if ($list[$i]->[1] =~ /^(open list)/i);
> +		    }
> +		} elsif (lc($str) eq "s") {
> +		    for (my $i = 0; $i < $count; $i++) {
> +			$selected{$i} = !$selected{$i}
> +			    if ($list[$i]->[1] =~ /^(subscriber list)/i);
> +		    }
> +		}
> +	    } elsif ($sel eq "a") {
> +		if ($val > 0 && $val <= $count) {
> +		    $authored{$val - 1} = !$authored{$val - 1};
> +		} elsif ($str eq '*' || $str eq '^') {
> +		    my $toggle = 0;
> +		    $toggle = 1 if ($str eq '*');
> +		    for (my $i = 0; $i < $count; $i++) {
> +			$authored{$i} = $toggle;
> +		    }
> +		}
> +	    } elsif ($sel eq "s") {
> +		if ($val > 0 && $val <= $count) {
> +		    $signed{$val - 1} = !$signed{$val - 1};
> +		} elsif ($str eq '*' || $str eq '^') {
> +		    my $toggle = 0;
> +		    $toggle = 1 if ($str eq '*');
> +		    for (my $i = 0; $i < $count; $i++) {
> +			$signed{$i} = $toggle;
> +		    }
> +		}
> +	    } elsif ($sel eq "o") {
> +		$print_options = 1;
> +		$redraw = 1;
> +	    } elsif ($sel eq "g") {
> +		if ($str eq "f") {
> +		    bool_invert(\$email_git_fallback);
> +		} else {
> +		    bool_invert(\$email_git);
> +		}
> +		$rerun = 1;
> +	    } elsif ($sel eq "b") {
> +		if ($str eq "s") {
> +		    bool_invert(\$email_git_blame_signatures);
> +		} else {
> +		    bool_invert(\$email_git_blame);
> +		}
> +		$rerun = 1;
> +	    } elsif ($sel eq "c") {
> +		if ($val > 0) {
> +		    $email_git_min_signatures = $val;
> +		    $rerun = 1;
> +		}
> +	    } elsif ($sel eq "x") {
> +		if ($val > 0) {
> +		    $email_git_max_maintainers = $val;
> +		    $rerun = 1;
> +		}
> +	    } elsif ($sel eq "%") {
> +		if ($str ne "" && $val >= 0) {
> +		    $email_git_min_percent = $val;
> +		    $rerun = 1;
> +		}
> +	    } elsif ($sel eq "d") {
> +		if (vcs_is_git()) {
> +		    $email_git_since = $str;
> +		} elsif (vcs_is_hg()) {
> +		    $email_hg_since = $str;
> +		}
> +		$rerun = 1;
> +	    } elsif ($sel eq "t") {
> +		bool_invert(\$email_git_all_signature_types);
> +		$rerun = 1;
> +	    } elsif ($sel eq "f") {
> +		bool_invert(\$email_file_emails);
> +		$rerun = 1;
> +	    } elsif ($sel eq "r") {
> +		bool_invert(\$email_remove_duplicates);
> +		$rerun = 1;
> +	    } elsif ($sel eq "m") {
> +		bool_invert(\$email_use_mailmap);
> +		read_mailmap();
> +		$rerun = 1;
> +	    } elsif ($sel eq "k") {
> +		bool_invert(\$keywords);
> +		$rerun = 1;
> +	    } elsif ($sel eq "p") {
> +		if ($str ne "" && $val >= 0) {
> +		    $pattern_depth = $val;
> +		    $rerun = 1;
> +		}
> +	    } elsif ($sel eq "h" || $sel eq "?") {
> +		print STDERR <<EOT
> +
> +Interactive mode allows you to select the various maintainers, submitters,
> +commit signers and mailing lists that could be CC'd on a patch.
> +
> +Any *'d entry is selected.
> +
> +If you have git or hg installed, you can choose to summarize the commit
> +history of files in the patch.  Also, each line of the current file can
> +be matched to its commit author and that commits signers with blame.
> +
> +Various knobs exist to control the length of time for active commit
> +tracking, the maximum number of commit authors and signers to add,
> +and such.
> +
> +Enter selections at the prompt until you are satisfied that the selected
> +maintainers are appropriate.  You may enter multiple selections separated
> +by either commas or spaces.
> +
> +EOT
> +	    } else {
> +		print STDERR "invalid option: '$nr'\n";
> +		$redraw = 0;
> +	    }
> +	}
> +	if ($rerun) {
> +	    print STDERR "git-blame can be very slow, please have patience..."
> +		if ($email_git_blame);
> +	    goto &get_maintainers;
> +	}
> +    }
> +
> +    #drop not selected entries
> +    $count = 0;
> +    my @new_emailto = ();
> +    foreach my $entry (@list) {
> +	if ($selected{$count}) {
> +	    push(@new_emailto, $list[$count]);
> +	}
> +	$count++;
> +    }
> +    return @new_emailto;
> +}
> +
> +sub bool_invert {
> +    my ($bool_ref) = @_;
> +
> +    if ($$bool_ref) {
> +	$$bool_ref = 0;
> +    } else {
> +	$$bool_ref = 1;
> +    }
> +}
> +
> +sub deduplicate_email {
> +    my ($email) = @_;
> +
> +    my $matched = 0;
> +    my ($name, $address) = parse_email($email);
> +    $email = format_email($name, $address, 1);
> +    $email = mailmap_email($email);
> +
> +    return $email if (!$email_remove_duplicates);
> +
> +    ($name, $address) = parse_email($email);
> +
> +    if ($name ne "" && $deduplicate_name_hash{lc($name)}) {
> +	$name = $deduplicate_name_hash{lc($name)}->[0];
> +	$address = $deduplicate_name_hash{lc($name)}->[1];
> +	$matched = 1;
> +    } elsif ($deduplicate_address_hash{lc($address)}) {
> +	$name = $deduplicate_address_hash{lc($address)}->[0];
> +	$address = $deduplicate_address_hash{lc($address)}->[1];
> +	$matched = 1;
> +    }
> +    if (!$matched) {
> +	$deduplicate_name_hash{lc($name)} = [ $name, $address ];
> +	$deduplicate_address_hash{lc($address)} = [ $name, $address ];
> +    }
> +    $email = format_email($name, $address, 1);
> +    $email = mailmap_email($email);
> +    return $email;
> +}
> +
> +sub save_commits_by_author {
> +    my (@lines) = @_;
> +
> +    my @authors = ();
> +    my @commits = ();
> +    my @subjects = ();
> +
> +    foreach my $line (@lines) {
> +	if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
> +	    my $author = $1;
> +	    $author = deduplicate_email($author);
> +	    push(@authors, $author);
> +	}
> +	push(@commits, $1) if ($line =~ m/$VCS_cmds{"commit_pattern"}/);
> +	push(@subjects, $1) if ($line =~ m/$VCS_cmds{"subject_pattern"}/);
> +    }
> +
> +    for (my $i = 0; $i < @authors; $i++) {
> +	my $exists = 0;
> +	foreach my $ref(@{$commit_author_hash{$authors[$i]}}) {
> +	    if (@{$ref}[0] eq $commits[$i] &&
> +		@{$ref}[1] eq $subjects[$i]) {
> +		$exists = 1;
> +		last;
> +	    }
> +	}
> +	if (!$exists) {
> +	    push(@{$commit_author_hash{$authors[$i]}},
> +		 [ ($commits[$i], $subjects[$i]) ]);
> +	}
> +    }
> +}
> +
> +sub save_commits_by_signer {
> +    my (@lines) = @_;
> +
> +    my $commit = "";
> +    my $subject = "";
> +
> +    foreach my $line (@lines) {
> +	$commit = $1 if ($line =~ m/$VCS_cmds{"commit_pattern"}/);
> +	$subject = $1 if ($line =~ m/$VCS_cmds{"subject_pattern"}/);
> +	if ($line =~ /^[ \t]*${signature_pattern}.*\@.*$/) {
> +	    my @signatures = ($line);
> +	    my ($types_ref, $signers_ref) = extract_formatted_signatures(@signatures);
> +	    my @types = @$types_ref;
> +	    my @signers = @$signers_ref;
> +
> +	    my $type = $types[0];
> +	    my $signer = $signers[0];
> +
> +	    $signer = deduplicate_email($signer);
> +
> +	    my $exists = 0;
> +	    foreach my $ref(@{$commit_signer_hash{$signer}}) {
> +		if (@{$ref}[0] eq $commit &&
> +		    @{$ref}[1] eq $subject &&
> +		    @{$ref}[2] eq $type) {
> +		    $exists = 1;
> +		    last;
> +		}
> +	    }
> +	    if (!$exists) {
> +		push(@{$commit_signer_hash{$signer}},
> +		     [ ($commit, $subject, $type) ]);
> +	    }
> +	}
> +    }
> +}
> +
> +sub vcs_assign {
> +    my ($role, $divisor, @lines) = @_;
> +
> +    my %hash;
> +    my $count = 0;
> +
> +    return if (@lines <= 0);
> +
> +    if ($divisor <= 0) {
> +	warn("Bad divisor in " . (caller(0))[3] . ": $divisor\n");
> +	$divisor = 1;
> +    }
> +
> +    @lines = mailmap(@lines);
> +
> +    return if (@lines <= 0);
> +
> +    @lines = sort(@lines);
> +
> +    # uniq -c
> +    $hash{$_}++ for @lines;
> +
> +    # sort -rn
> +    foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
> +	my $sign_offs = $hash{$line};
> +	my $percent = $sign_offs * 100 / $divisor;
> +
> +	$percent = 100 if ($percent > 100);
> +	next if (ignore_email_address($line));
> +	$count++;
> +	last if ($sign_offs < $email_git_min_signatures ||
> +		 $count > $email_git_max_maintainers ||
> +		 $percent < $email_git_min_percent);
> +	push_email_address($line, '');
> +	if ($output_rolestats) {
> +	    my $fmt_percent = sprintf("%.0f", $percent);
> +	    add_role($line, "$role:$sign_offs/$divisor=$fmt_percent%");
> +	} else {
> +	    add_role($line, $role);
> +	}
> +    }
> +}
> +
> +sub vcs_file_signoffs {
> +    my ($file) = @_;
> +
> +    my $authors_ref;
> +    my $signers_ref;
> +    my $stats_ref;
> +    my @authors = ();
> +    my @signers = ();
> +    my @stats = ();
> +    my $commits;
> +
> +    $vcs_used = vcs_exists();
> +    return if (!$vcs_used);
> +
> +    my $cmd = $VCS_cmds{"find_signers_cmd"};
> +    $cmd =~ s/(\$\w+)/$1/eeg;		# interpolate $cmd
> +
> +    ($commits, $signers_ref, $authors_ref, $stats_ref) = vcs_find_signers($cmd, $file);
> +
> +    @signers = @{$signers_ref} if defined $signers_ref;
> +    @authors = @{$authors_ref} if defined $authors_ref;
> +    @stats = @{$stats_ref} if defined $stats_ref;
> +
> +#    print("commits: <$commits>\nsigners:<@signers>\nauthors: <@authors>\nstats: <@stats>\n");
> +
> +    foreach my $signer (@signers) {
> +	$signer = deduplicate_email($signer);
> +    }
> +
> +    vcs_assign("commit_signer", $commits, @signers);
> +    vcs_assign("authored", $commits, @authors);
> +    if ($#authors == $#stats) {
> +	my $stat_pattern = $VCS_cmds{"stat_pattern"};
> +	$stat_pattern =~ s/(\$\w+)/$1/eeg;	#interpolate $stat_pattern
> +
> +	my $added = 0;
> +	my $deleted = 0;
> +	for (my $i = 0; $i <= $#stats; $i++) {
> +	    if ($stats[$i] =~ /$stat_pattern/) {
> +		$added += $1;
> +		$deleted += $2;
> +	    }
> +	}
> +	my @tmp_authors = uniq(@authors);
> +	foreach my $author (@tmp_authors) {
> +	    $author = deduplicate_email($author);
> +	}
> +	@tmp_authors = uniq(@tmp_authors);
> +	my @list_added = ();
> +	my @list_deleted = ();
> +	foreach my $author (@tmp_authors) {
> +	    my $auth_added = 0;
> +	    my $auth_deleted = 0;
> +	    for (my $i = 0; $i <= $#stats; $i++) {
> +		if ($author eq deduplicate_email($authors[$i]) &&
> +		    $stats[$i] =~ /$stat_pattern/) {
> +		    $auth_added += $1;
> +		    $auth_deleted += $2;
> +		}
> +	    }
> +	    for (my $i = 0; $i < $auth_added; $i++) {
> +		push(@list_added, $author);
> +	    }
> +	    for (my $i = 0; $i < $auth_deleted; $i++) {
> +		push(@list_deleted, $author);
> +	    }
> +	}
> +	vcs_assign("added_lines", $added, @list_added);
> +	vcs_assign("removed_lines", $deleted, @list_deleted);
> +    }
> +}
> +
> +sub vcs_file_blame {
> +    my ($file) = @_;
> +
> +    my @signers = ();
> +    my @all_commits = ();
> +    my @commits = ();
> +    my $total_commits;
> +    my $total_lines;
> +
> +    $vcs_used = vcs_exists();
> +    return if (!$vcs_used);
> +
> +    @all_commits = vcs_blame($file);
> +    @commits = uniq(@all_commits);
> +    $total_commits = @commits;
> +    $total_lines = @all_commits;
> +
> +    if ($email_git_blame_signatures) {
> +	if (vcs_is_hg()) {
> +	    my $commit_count;
> +	    my $commit_authors_ref;
> +	    my $commit_signers_ref;
> +	    my $stats_ref;
> +	    my @commit_authors = ();
> +	    my @commit_signers = ();
> +	    my $commit = join(" -r ", @commits);
> +	    my $cmd;
> +
> +	    $cmd = $VCS_cmds{"find_commit_signers_cmd"};
> +	    $cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
> +
> +	    ($commit_count, $commit_signers_ref, $commit_authors_ref, $stats_ref) = vcs_find_signers($cmd, $file);
> +	    @commit_authors = @{$commit_authors_ref} if defined $commit_authors_ref;
> +	    @commit_signers = @{$commit_signers_ref} if defined $commit_signers_ref;
> +
> +	    push(@signers, @commit_signers);
> +	} else {
> +	    foreach my $commit (@commits) {
> +		my $commit_count;
> +		my $commit_authors_ref;
> +		my $commit_signers_ref;
> +		my $stats_ref;
> +		my @commit_authors = ();
> +		my @commit_signers = ();
> +		my $cmd;
> +
> +		$cmd = $VCS_cmds{"find_commit_signers_cmd"};
> +		$cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
> +
> +		($commit_count, $commit_signers_ref, $commit_authors_ref, $stats_ref) = vcs_find_signers($cmd, $file);
> +		@commit_authors = @{$commit_authors_ref} if defined $commit_authors_ref;
> +		@commit_signers = @{$commit_signers_ref} if defined $commit_signers_ref;
> +
> +		push(@signers, @commit_signers);
> +	    }
> +	}
> +    }
> +
> +    if ($from_filename) {
> +	if ($output_rolestats) {
> +	    my @blame_signers;
> +	    if (vcs_is_hg()) {{		# Double brace for last exit
> +		my $commit_count;
> +		my @commit_signers = ();
> +		@commits = uniq(@commits);
> +		@commits = sort(@commits);
> +		my $commit = join(" -r ", @commits);
> +		my $cmd;
> +
> +		$cmd = $VCS_cmds{"find_commit_author_cmd"};
> +		$cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
> +
> +		my @lines = ();
> +
> +		@lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
> +
> +		if (!$email_git_penguin_chiefs) {
> +		    @lines = grep(!/${penguin_chiefs}/i, @lines);
> +		}
> +
> +		last if !@...es;
> +
> +		my @authors = ();
> +		foreach my $line (@lines) {
> +		    if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
> +			my $author = $1;
> +			$author = deduplicate_email($author);
> +			push(@authors, $author);
> +		    }
> +		}
> +
> +		save_commits_by_author(@lines) if ($interactive);
> +		save_commits_by_signer(@lines) if ($interactive);
> +
> +		push(@signers, @authors);
> +	    }}
> +	    else {
> +		foreach my $commit (@commits) {
> +		    my $i;
> +		    my $cmd = $VCS_cmds{"find_commit_author_cmd"};
> +		    $cmd =~ s/(\$\w+)/$1/eeg;	#interpolate $cmd
> +		    my @author = vcs_find_author($cmd);
> +		    next if !@...hor;
> +
> +		    my $formatted_author = deduplicate_email($author[0]);
> +
> +		    my $count = grep(/$commit/, @all_commits);
> +		    for ($i = 0; $i < $count ; $i++) {
> +			push(@blame_signers, $formatted_author);
> +		    }
> +		}
> +	    }
> +	    if (@blame_signers) {
> +		vcs_assign("authored lines", $total_lines, @blame_signers);
> +	    }
> +	}
> +	foreach my $signer (@signers) {
> +	    $signer = deduplicate_email($signer);
> +	}
> +	vcs_assign("commits", $total_commits, @signers);
> +    } else {
> +	foreach my $signer (@signers) {
> +	    $signer = deduplicate_email($signer);
> +	}
> +	vcs_assign("modified commits", $total_commits, @signers);
> +    }
> +}
> +
> +sub vcs_file_exists {
> +    my ($file) = @_;
> +
> +    my $exists;
> +
> +    my $vcs_used = vcs_exists();
> +    return 0 if (!$vcs_used);
> +
> +    my $cmd = $VCS_cmds{"file_exists_cmd"};
> +    $cmd =~ s/(\$\w+)/$1/eeg;		# interpolate $cmd
> +    $cmd .= " 2>&1";
> +    $exists = &{$VCS_cmds{"execute_cmd"}}($cmd);
> +
> +    return 0 if ($? != 0);
> +
> +    return $exists;
> +}
> +
> +sub vcs_list_files {
> +    my ($file) = @_;
> +
> +    my @lsfiles = ();
> +
> +    my $vcs_used = vcs_exists();
> +    return 0 if (!$vcs_used);
> +
> +    my $cmd = $VCS_cmds{"list_files_cmd"};
> +    $cmd =~ s/(\$\w+)/$1/eeg;   # interpolate $cmd
> +    @lsfiles = &{$VCS_cmds{"execute_cmd"}}($cmd);
> +
> +    return () if ($? != 0);
> +
> +    return @lsfiles;
> +}
> +
> +sub uniq {
> +    my (@parms) = @_;
> +
> +    my %saw;
> +    @parms = grep(!$saw{$_}++, @parms);
> +    return @parms;
> +}
> +
> +sub sort_and_uniq {
> +    my (@parms) = @_;
> +
> +    my %saw;
> +    @parms = sort @parms;
> +    @parms = grep(!$saw{$_}++, @parms);
> +    return @parms;
> +}
> +
> +sub clean_file_emails {
> +    my (@file_emails) = @_;
> +    my @fmt_emails = ();
> +
> +    foreach my $email (@file_emails) {
> +	$email =~ s/[\(\<\{]{0,1}([A-Za-z0-9_\.\+-]+\@[A-Za-z0-9\.-]+)[\)\>\}]{0,1}/\<$1\>/g;
> +	my ($name, $address) = parse_email($email);
> +	if ($name eq '"[,\.]"') {
> +	    $name = "";
> +	}
> +
> +	my @nw = split(/[^A-Za-zÀ-ÿ\'\,\.\+-]/, $name);
> +	if (@nw > 2) {
> +	    my $first = $nw[@nw - 3];
> +	    my $middle = $nw[@nw - 2];
> +	    my $last = $nw[@nw - 1];
> +
> +	    if (((length($first) == 1 && $first =~ m/[A-Za-z]/) ||
> +		 (length($first) == 2 && substr($first, -1) eq ".")) ||
> +		(length($middle) == 1 ||
> +		 (length($middle) == 2 && substr($middle, -1) eq "."))) {
> +		$name = "$first $middle $last";
> +	    } else {
> +		$name = "$middle $last";
> +	    }
> +	}
> +
> +	if (substr($name, -1) =~ /[,\.]/) {
> +	    $name = substr($name, 0, length($name) - 1);
> +	} elsif (substr($name, -2) =~ /[,\.]"/) {
> +	    $name = substr($name, 0, length($name) - 2) . '"';
> +	}
> +
> +	if (substr($name, 0, 1) =~ /[,\.]/) {
> +	    $name = substr($name, 1, length($name) - 1);
> +	} elsif (substr($name, 0, 2) =~ /"[,\.]/) {
> +	    $name = '"' . substr($name, 2, length($name) - 2);
> +	}
> +
> +	my $fmt_email = format_email($name, $address, $email_usename);
> +	push(@fmt_emails, $fmt_email);
> +    }
> +    return @fmt_emails;
> +}
> +
> +sub merge_email {
> +    my @lines;
> +    my %saw;
> +
> +    for (@_) {
> +	my ($address, $role) = @$_;
> +	if (!$saw{$address}) {
> +	    if ($output_roles) {
> +		push(@lines, "$address ($role)");
> +	    } else {
> +		push(@lines, $address);
> +	    }
> +	    $saw{$address} = 1;
> +	}
> +    }
> +
> +    return @lines;
> +}
> +
> +sub output {
> +    my (@parms) = @_;
> +
> +    if ($output_multiline) {
> +	foreach my $line (@parms) {
> +	    print("${line}\n");
> +	}
> +    } else {
> +	print(join($output_separator, @parms));
> +	print("\n");
> +    }
> +}
> +
> +my $rfc822re;
> +
> +sub make_rfc822re {
> +#   Basic lexical tokens are specials, domain_literal, quoted_string, atom, and
> +#   comment.  We must allow for rfc822_lwsp (or comments) after each of these.
> +#   This regexp will only work on addresses which have had comments stripped
> +#   and replaced with rfc822_lwsp.
> +
> +    my $specials = '()<>@,;:\\\\".\\[\\]';
> +    my $controls = '\\000-\\037\\177';
> +
> +    my $dtext = "[^\\[\\]\\r\\\\]";
> +    my $domain_literal = "\\[(?:$dtext|\\\\.)*\\]$rfc822_lwsp*";
> +
> +    my $quoted_string = "\"(?:[^\\\"\\r\\\\]|\\\\.|$rfc822_lwsp)*\"$rfc822_lwsp*";
> +
> +#   Use zero-width assertion to spot the limit of an atom.  A simple
> +#   $rfc822_lwsp* causes the regexp engine to hang occasionally.
> +    my $atom = "[^$specials $controls]+(?:$rfc822_lwsp+|\\Z|(?=[\\[\"$specials]))";
> +    my $word = "(?:$atom|$quoted_string)";
> +    my $localpart = "$word(?:\\.$rfc822_lwsp*$word)*";
> +
> +    my $sub_domain = "(?:$atom|$domain_literal)";
> +    my $domain = "$sub_domain(?:\\.$rfc822_lwsp*$sub_domain)*";
> +
> +    my $addr_spec = "$localpart\@$rfc822_lwsp*$domain";
> +
> +    my $phrase = "$word*";
> +    my $route = "(?:\@$domain(?:,\@$rfc822_lwsp*$domain)*:$rfc822_lwsp*)";
> +    my $route_addr = "\\<$rfc822_lwsp*$route?$addr_spec\\>$rfc822_lwsp*";
> +    my $mailbox = "(?:$addr_spec|$phrase$route_addr)";
> +
> +    my $group = "$phrase:$rfc822_lwsp*(?:$mailbox(?:,\\s*$mailbox)*)?;\\s*";
> +    my $address = "(?:$mailbox|$group)";
> +
> +    return "$rfc822_lwsp*$address";
> +}
> +
> +sub rfc822_strip_comments {
> +    my $s = shift;
> +#   Recursively remove comments, and replace with a single space.  The simpler
> +#   regexps in the Email Addressing FAQ are imperfect - they will miss escaped
> +#   chars in atoms, for example.
> +
> +    while ($s =~ s/^((?:[^"\\]|\\.)*
> +                    (?:"(?:[^"\\]|\\.)*"(?:[^"\\]|\\.)*)*)
> +                    \((?:[^()\\]|\\.)*\)/$1 /osx) {}
> +    return $s;
> +}
> +
> +#   valid: returns true if the parameter is an RFC822 valid address
> +#
> +sub rfc822_valid {
> +    my $s = rfc822_strip_comments(shift);
> +
> +    if (!$rfc822re) {
> +        $rfc822re = make_rfc822re();
> +    }
> +
> +    return $s =~ m/^$rfc822re$/so && $s =~ m/^$rfc822_char*$/;
> +}
> +
> +#   validlist: In scalar context, returns true if the parameter is an RFC822
> +#              valid list of addresses.
> +#
> +#              In list context, returns an empty list on failure (an invalid
> +#              address was found); otherwise a list whose first element is the
> +#              number of addresses found and whose remaining elements are the
> +#              addresses.  This is needed to disambiguate failure (invalid)
> +#              from success with no addresses found, because an empty string is
> +#              a valid list.
> +
> +sub rfc822_validlist {
> +    my $s = rfc822_strip_comments(shift);
> +
> +    if (!$rfc822re) {
> +        $rfc822re = make_rfc822re();
> +    }
> +    # * null list items are valid according to the RFC
> +    # * the '1' business is to aid in distinguishing failure from no results
> +
> +    my @r;
> +    if ($s =~ m/^(?:$rfc822re)?(?:,(?:$rfc822re)?)*$/so &&
> +	$s =~ m/^$rfc822_char*$/) {
> +        while ($s =~ m/(?:^|,$rfc822_lwsp*)($rfc822re)/gos) {
> +            push(@r, $1);
> +        }
> +        return wantarray ? (scalar(@r), @r) : 1;
> +    }
> +    return wantarray ? () : 0;
> +}


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