xref: /openbmc/u-boot/scripts/get_maintainer.pl (revision bf802f5d)
1#!/usr/bin/env perl
2# (c) 2007, Joe Perches <joe@perches.com>
3#           created from checkpatch.pl
4#
5# Print selected MAINTAINERS information for
6# the files modified in a patch or for a file
7#
8# usage: perl scripts/get_maintainer.pl [OPTIONS] <patch>
9#        perl scripts/get_maintainer.pl [OPTIONS] -f <file>
10#
11# Licensed under the terms of the GNU GPL License version 2
12
13use warnings;
14use strict;
15
16my $P = $0;
17my $V = '0.26';
18
19use Getopt::Long qw(:config no_auto_abbrev);
20use Cwd;
21use File::Find;
22
23my $cur_path = fastgetcwd() . '/';
24my $lk_path = "./";
25my $email = 1;
26my $email_usename = 1;
27my $email_maintainer = 1;
28my $email_reviewer = 1;
29my $email_list = 1;
30my $email_subscriber_list = 0;
31my $email_git_penguin_chiefs = 0;
32my $email_git = 0;
33my $email_git_all_signature_types = 0;
34my $email_git_blame = 0;
35my $email_git_blame_signatures = 1;
36my $email_git_fallback = 1;
37my $email_git_min_signatures = 1;
38my $email_git_max_maintainers = 5;
39my $email_git_min_percent = 5;
40my $email_git_since = "1-year-ago";
41my $email_hg_since = "-365";
42my $interactive = 0;
43my $email_remove_duplicates = 1;
44my $email_use_mailmap = 1;
45my $output_multiline = 1;
46my $output_separator = ", ";
47my $output_roles = 0;
48my $output_rolestats = 1;
49my $output_section_maxlen = 50;
50my $scm = 0;
51my $web = 0;
52my $subsystem = 0;
53my $status = 0;
54my $letters = "";
55my $keywords = 1;
56my $sections = 0;
57my $file_emails = 0;
58my $from_filename = 0;
59my $pattern_depth = 0;
60my $version = 0;
61my $help = 0;
62my $find_maintainer_files = 1;
63
64my $vcs_used = 0;
65
66my $exit = 0;
67
68my %commit_author_hash;
69my %commit_signer_hash;
70
71my @penguin_chief = ();
72push(@penguin_chief, "Tom Rini:trini\@konsulko.com");
73
74my @penguin_chief_names = ();
75foreach my $chief (@penguin_chief) {
76    if ($chief =~ m/^(.*):(.*)/) {
77	my $chief_name = $1;
78	my $chief_addr = $2;
79	push(@penguin_chief_names, $chief_name);
80    }
81}
82my $penguin_chiefs = "\(" . join("|", @penguin_chief_names) . "\)";
83
84# Signature types of people who are either
85# 	a) responsible for the code in question, or
86# 	b) familiar enough with it to give relevant feedback
87my @signature_tags = ();
88push(@signature_tags, "Signed-off-by:");
89push(@signature_tags, "Reviewed-by:");
90push(@signature_tags, "Acked-by:");
91
92my $signature_pattern = "\(" . join("|", @signature_tags) . "\)";
93
94# rfc822 email address - preloaded methods go here.
95my $rfc822_lwsp = "(?:(?:\\r\\n)?[ \\t])";
96my $rfc822_char = '[\\000-\\377]';
97
98# VCS command support: class-like functions and strings
99
100my %VCS_cmds;
101
102my %VCS_cmds_git = (
103    "execute_cmd" => \&git_execute_cmd,
104    "available" => '(which("git") ne "") && (-e ".git")',
105    "find_signers_cmd" =>
106	"git log --no-color --follow --since=\$email_git_since " .
107	    '--numstat --no-merges ' .
108	    '--format="GitCommit: %H%n' .
109		      'GitAuthor: %an <%ae>%n' .
110		      'GitDate: %aD%n' .
111		      'GitSubject: %s%n' .
112		      '%b%n"' .
113	    " -- \$file",
114    "find_commit_signers_cmd" =>
115	"git log --no-color " .
116	    '--numstat ' .
117	    '--format="GitCommit: %H%n' .
118		      'GitAuthor: %an <%ae>%n' .
119		      'GitDate: %aD%n' .
120		      'GitSubject: %s%n' .
121		      '%b%n"' .
122	    " -1 \$commit",
123    "find_commit_author_cmd" =>
124	"git log --no-color " .
125	    '--numstat ' .
126	    '--format="GitCommit: %H%n' .
127		      'GitAuthor: %an <%ae>%n' .
128		      'GitDate: %aD%n' .
129		      'GitSubject: %s%n"' .
130	    " -1 \$commit",
131    "blame_range_cmd" => "git blame -l -L \$diff_start,+\$diff_length \$file",
132    "blame_file_cmd" => "git blame -l \$file",
133    "commit_pattern" => "^GitCommit: ([0-9a-f]{40,40})",
134    "blame_commit_pattern" => "^([0-9a-f]+) ",
135    "author_pattern" => "^GitAuthor: (.*)",
136    "subject_pattern" => "^GitSubject: (.*)",
137    "stat_pattern" => "^(\\d+)\\t(\\d+)\\t\$file\$",
138    "file_exists_cmd" => "git ls-files \$file",
139);
140
141my %VCS_cmds_hg = (
142    "execute_cmd" => \&hg_execute_cmd,
143    "available" => '(which("hg") ne "") && (-d ".hg")',
144    "find_signers_cmd" =>
145	"hg log --date=\$email_hg_since " .
146	    "--template='HgCommit: {node}\\n" .
147	                "HgAuthor: {author}\\n" .
148			"HgSubject: {desc}\\n'" .
149	    " -- \$file",
150    "find_commit_signers_cmd" =>
151	"hg log " .
152	    "--template='HgSubject: {desc}\\n'" .
153	    " -r \$commit",
154    "find_commit_author_cmd" =>
155	"hg log " .
156	    "--template='HgCommit: {node}\\n" .
157		        "HgAuthor: {author}\\n" .
158			"HgSubject: {desc|firstline}\\n'" .
159	    " -r \$commit",
160    "blame_range_cmd" => "",		# not supported
161    "blame_file_cmd" => "hg blame -n \$file",
162    "commit_pattern" => "^HgCommit: ([0-9a-f]{40,40})",
163    "blame_commit_pattern" => "^([ 0-9a-f]+):",
164    "author_pattern" => "^HgAuthor: (.*)",
165    "subject_pattern" => "^HgSubject: (.*)",
166    "stat_pattern" => "^(\\d+)\t(\\d+)\t\$file\$",
167    "file_exists_cmd" => "hg files \$file",
168);
169
170my $conf = which_conf(".get_maintainer.conf");
171if (-f $conf) {
172    my @conf_args;
173    open(my $conffile, '<', "$conf")
174	or warn "$P: Can't find a readable .get_maintainer.conf file $!\n";
175
176    while (<$conffile>) {
177	my $line = $_;
178
179	$line =~ s/\s*\n?$//g;
180	$line =~ s/^\s*//g;
181	$line =~ s/\s+/ /g;
182
183	next if ($line =~ m/^\s*#/);
184	next if ($line =~ m/^\s*$/);
185
186	my @words = split(" ", $line);
187	foreach my $word (@words) {
188	    last if ($word =~ m/^#/);
189	    push (@conf_args, $word);
190	}
191    }
192    close($conffile);
193    unshift(@ARGV, @conf_args) if @conf_args;
194}
195
196my @ignore_emails = ();
197my $ignore_file = which_conf(".get_maintainer.ignore");
198if (-f $ignore_file) {
199    open(my $ignore, '<', "$ignore_file")
200	or warn "$P: Can't find a readable .get_maintainer.ignore file $!\n";
201    while (<$ignore>) {
202	my $line = $_;
203
204	$line =~ s/\s*\n?$//;
205	$line =~ s/^\s*//;
206	$line =~ s/\s+$//;
207	$line =~ s/#.*$//;
208
209	next if ($line =~ m/^\s*$/);
210	if (rfc822_valid($line)) {
211	    push(@ignore_emails, $line);
212	}
213    }
214    close($ignore);
215}
216
217if (!GetOptions(
218		'email!' => \$email,
219		'git!' => \$email_git,
220		'git-all-signature-types!' => \$email_git_all_signature_types,
221		'git-blame!' => \$email_git_blame,
222		'git-blame-signatures!' => \$email_git_blame_signatures,
223		'git-fallback!' => \$email_git_fallback,
224		'git-chief-penguins!' => \$email_git_penguin_chiefs,
225		'git-min-signatures=i' => \$email_git_min_signatures,
226		'git-max-maintainers=i' => \$email_git_max_maintainers,
227		'git-min-percent=i' => \$email_git_min_percent,
228		'git-since=s' => \$email_git_since,
229		'hg-since=s' => \$email_hg_since,
230		'i|interactive!' => \$interactive,
231		'remove-duplicates!' => \$email_remove_duplicates,
232		'mailmap!' => \$email_use_mailmap,
233		'm!' => \$email_maintainer,
234		'r!' => \$email_reviewer,
235		'n!' => \$email_usename,
236		'l!' => \$email_list,
237		's!' => \$email_subscriber_list,
238		'multiline!' => \$output_multiline,
239		'roles!' => \$output_roles,
240		'rolestats!' => \$output_rolestats,
241		'separator=s' => \$output_separator,
242		'subsystem!' => \$subsystem,
243		'status!' => \$status,
244		'scm!' => \$scm,
245		'web!' => \$web,
246		'letters=s' => \$letters,
247		'pattern-depth=i' => \$pattern_depth,
248		'k|keywords!' => \$keywords,
249		'sections!' => \$sections,
250		'fe|file-emails!' => \$file_emails,
251		'f|file' => \$from_filename,
252		'find-maintainer-files' => \$find_maintainer_files,
253		'v|version' => \$version,
254		'h|help|usage' => \$help,
255		)) {
256    die "$P: invalid argument - use --help if necessary\n";
257}
258
259if ($help != 0) {
260    usage();
261    exit 0;
262}
263
264if ($version != 0) {
265    print("${P} ${V}\n");
266    exit 0;
267}
268
269if (-t STDIN && !@ARGV) {
270    # We're talking to a terminal, but have no command line arguments.
271    die "$P: missing patchfile or -f file - use --help if necessary\n";
272}
273
274$output_multiline = 0 if ($output_separator ne ", ");
275$output_rolestats = 1 if ($interactive);
276$output_roles = 1 if ($output_rolestats);
277
278if ($sections || $letters ne "") {
279    $sections = 1;
280    $email = 0;
281    $email_list = 0;
282    $scm = 0;
283    $status = 0;
284    $subsystem = 0;
285    $web = 0;
286    $keywords = 0;
287    $interactive = 0;
288} else {
289    my $selections = $email + $scm + $status + $subsystem + $web;
290    if ($selections == 0) {
291	die "$P:  Missing required option: email, scm, status, subsystem or web\n";
292    }
293}
294
295if ($email &&
296    ($email_maintainer + $email_reviewer +
297     $email_list + $email_subscriber_list +
298     $email_git + $email_git_penguin_chiefs + $email_git_blame) == 0) {
299    die "$P: Please select at least 1 email option\n";
300}
301
302if (!top_of_kernel_tree($lk_path)) {
303    die "$P: The current directory does not appear to be "
304	. "a U-Boot source tree.\n";
305}
306
307## Read MAINTAINERS for type/value pairs
308
309my @typevalue = ();
310my %keyword_hash;
311my @mfiles = ();
312
313sub read_maintainer_file {
314    my ($file) = @_;
315
316    open (my $maint, '<', "$file")
317	or die "$P: Can't open MAINTAINERS file '$file': $!\n";
318    while (<$maint>) {
319	my $line = $_;
320
321	if ($line =~ m/^([A-Z]):\s*(.*)/) {
322	    my $type = $1;
323	    my $value = $2;
324
325	    ##Filename pattern matching
326	    if ($type eq "F" || $type eq "X") {
327		$value =~ s@\.@\\\.@g;       ##Convert . to \.
328		$value =~ s/\*/\.\*/g;       ##Convert * to .*
329		$value =~ s/\?/\./g;         ##Convert ? to .
330		##if pattern is a directory and it lacks a trailing slash, add one
331		if ((-d $value)) {
332		    $value =~ s@([^/])$@$1/@;
333		}
334	    } elsif ($type eq "K") {
335		$keyword_hash{@typevalue} = $value;
336	    }
337	    push(@typevalue, "$type:$value");
338	} elsif (!(/^\s*$/ || /^\s*\#/)) {
339	    $line =~ s/\n$//g;
340	    push(@typevalue, $line);
341	}
342    }
343    close($maint);
344}
345
346sub find_is_maintainer_file {
347    my ($file) = $_;
348    return if ($file !~ m@/MAINTAINERS$@);
349    $file = $File::Find::name;
350    return if (! -f $file);
351    push(@mfiles, $file);
352}
353
354sub find_ignore_git {
355    return grep { $_ !~ /^\.git$/; } @_;
356}
357
358if (-d "${lk_path}MAINTAINERS") {
359    opendir(DIR, "${lk_path}MAINTAINERS") or die $!;
360    my @files = readdir(DIR);
361    closedir(DIR);
362    foreach my $file (@files) {
363	push(@mfiles, "${lk_path}MAINTAINERS/$file") if ($file !~ /^\./);
364    }
365}
366
367if ($find_maintainer_files) {
368    find( { wanted => \&find_is_maintainer_file,
369	    preprocess => \&find_ignore_git,
370	    no_chdir => 1,
371	}, "${lk_path}");
372} else {
373    push(@mfiles, "${lk_path}MAINTAINERS") if -f "${lk_path}MAINTAINERS";
374}
375
376foreach my $file (@mfiles) {
377    read_maintainer_file("$file");
378}
379
380#
381# Read mail address map
382#
383
384my $mailmap;
385
386read_mailmap();
387
388sub read_mailmap {
389    $mailmap = {
390	names => {},
391	addresses => {}
392    };
393
394    return if (!$email_use_mailmap || !(-f "${lk_path}.mailmap"));
395
396    open(my $mailmap_file, '<', "${lk_path}.mailmap")
397	or warn "$P: Can't open .mailmap: $!\n";
398
399    while (<$mailmap_file>) {
400	s/#.*$//; #strip comments
401	s/^\s+|\s+$//g; #trim
402
403	next if (/^\s*$/); #skip empty lines
404	#entries have one of the following formats:
405	# name1 <mail1>
406	# <mail1> <mail2>
407	# name1 <mail1> <mail2>
408	# name1 <mail1> name2 <mail2>
409	# (see man git-shortlog)
410
411	if (/^([^<]+)<([^>]+)>$/) {
412	    my $real_name = $1;
413	    my $address = $2;
414
415	    $real_name =~ s/\s+$//;
416	    ($real_name, $address) = parse_email("$real_name <$address>");
417	    $mailmap->{names}->{$address} = $real_name;
418
419	} elsif (/^<([^>]+)>\s*<([^>]+)>$/) {
420	    my $real_address = $1;
421	    my $wrong_address = $2;
422
423	    $mailmap->{addresses}->{$wrong_address} = $real_address;
424
425	} elsif (/^(.+)<([^>]+)>\s*<([^>]+)>$/) {
426	    my $real_name = $1;
427	    my $real_address = $2;
428	    my $wrong_address = $3;
429
430	    $real_name =~ s/\s+$//;
431	    ($real_name, $real_address) =
432		parse_email("$real_name <$real_address>");
433	    $mailmap->{names}->{$wrong_address} = $real_name;
434	    $mailmap->{addresses}->{$wrong_address} = $real_address;
435
436	} elsif (/^(.+)<([^>]+)>\s*(.+)\s*<([^>]+)>$/) {
437	    my $real_name = $1;
438	    my $real_address = $2;
439	    my $wrong_name = $3;
440	    my $wrong_address = $4;
441
442	    $real_name =~ s/\s+$//;
443	    ($real_name, $real_address) =
444		parse_email("$real_name <$real_address>");
445
446	    $wrong_name =~ s/\s+$//;
447	    ($wrong_name, $wrong_address) =
448		parse_email("$wrong_name <$wrong_address>");
449
450	    my $wrong_email = format_email($wrong_name, $wrong_address, 1);
451	    $mailmap->{names}->{$wrong_email} = $real_name;
452	    $mailmap->{addresses}->{$wrong_email} = $real_address;
453	}
454    }
455    close($mailmap_file);
456}
457
458## use the filenames on the command line or find the filenames in the patchfiles
459
460my @files = ();
461my @range = ();
462my @keyword_tvi = ();
463my @file_emails = ();
464
465if (!@ARGV) {
466    push(@ARGV, "&STDIN");
467}
468
469foreach my $file (@ARGV) {
470    if ($file ne "&STDIN") {
471	##if $file is a directory and it lacks a trailing slash, add one
472	if ((-d $file)) {
473	    $file =~ s@([^/])$@$1/@;
474	} elsif (!(-f $file)) {
475	    die "$P: file '${file}' not found\n";
476	}
477    }
478    if ($from_filename || ($file ne "&STDIN" && vcs_file_exists($file))) {
479	$file =~ s/^\Q${cur_path}\E//;	#strip any absolute path
480	$file =~ s/^\Q${lk_path}\E//;	#or the path to the lk tree
481	push(@files, $file);
482	if ($file ne "MAINTAINERS" && -f $file && ($keywords || $file_emails)) {
483	    open(my $f, '<', $file)
484		or die "$P: Can't open $file: $!\n";
485	    my $text = do { local($/) ; <$f> };
486	    close($f);
487	    if ($keywords) {
488		foreach my $line (keys %keyword_hash) {
489		    if ($text =~ m/$keyword_hash{$line}/x) {
490			push(@keyword_tvi, $line);
491		    }
492		}
493	    }
494	    if ($file_emails) {
495		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;
496		push(@file_emails, clean_file_emails(@poss_addr));
497	    }
498	}
499    } else {
500	my $file_cnt = @files;
501	my $lastfile;
502
503	open(my $patch, "< $file")
504	    or die "$P: Can't open $file: $!\n";
505
506	# We can check arbitrary information before the patch
507	# like the commit message, mail headers, etc...
508	# This allows us to match arbitrary keywords against any part
509	# of a git format-patch generated file (subject tags, etc...)
510
511	my $patch_prefix = "";			#Parsing the intro
512
513	while (<$patch>) {
514	    my $patch_line = $_;
515	    if (m/^\+\+\+\s+(\S+)/ or m/^---\s+(\S+)/) {
516		my $filename = $1;
517		$filename =~ s@^[^/]*/@@;
518		$filename =~ s@\n@@;
519		$lastfile = $filename;
520		push(@files, $filename);
521		$patch_prefix = "^[+-].*";	#Now parsing the actual patch
522	    } elsif (m/^\@\@ -(\d+),(\d+)/) {
523		if ($email_git_blame) {
524		    push(@range, "$lastfile:$1:$2");
525		}
526	    } elsif ($keywords) {
527		foreach my $line (keys %keyword_hash) {
528		    if ($patch_line =~ m/${patch_prefix}$keyword_hash{$line}/x) {
529			push(@keyword_tvi, $line);
530		    }
531		}
532	    }
533	}
534	close($patch);
535
536	if ($file_cnt == @files) {
537	    warn "$P: file '${file}' doesn't appear to be a patch.  "
538		. "Add -f to options?\n";
539	}
540	@files = sort_and_uniq(@files);
541    }
542}
543
544@file_emails = uniq(@file_emails);
545
546my %email_hash_name;
547my %email_hash_address;
548my @email_to = ();
549my %hash_list_to;
550my @list_to = ();
551my @scm = ();
552my @web = ();
553my @subsystem = ();
554my @status = ();
555my %deduplicate_name_hash = ();
556my %deduplicate_address_hash = ();
557
558my @maintainers = get_maintainers();
559
560if (@maintainers) {
561    @maintainers = merge_email(@maintainers);
562    output(@maintainers);
563}
564
565if ($scm) {
566    @scm = uniq(@scm);
567    output(@scm);
568}
569
570if ($status) {
571    @status = uniq(@status);
572    output(@status);
573}
574
575if ($subsystem) {
576    @subsystem = uniq(@subsystem);
577    output(@subsystem);
578}
579
580if ($web) {
581    @web = uniq(@web);
582    output(@web);
583}
584
585exit($exit);
586
587sub ignore_email_address {
588    my ($address) = @_;
589
590    foreach my $ignore (@ignore_emails) {
591	return 1 if ($ignore eq $address);
592    }
593
594    return 0;
595}
596
597sub range_is_maintained {
598    my ($start, $end) = @_;
599
600    for (my $i = $start; $i < $end; $i++) {
601	my $line = $typevalue[$i];
602	if ($line =~ m/^([A-Z]):\s*(.*)/) {
603	    my $type = $1;
604	    my $value = $2;
605	    if ($type eq 'S') {
606		if ($value =~ /(maintain|support)/i) {
607		    return 1;
608		}
609	    }
610	}
611    }
612    return 0;
613}
614
615sub range_has_maintainer {
616    my ($start, $end) = @_;
617
618    for (my $i = $start; $i < $end; $i++) {
619	my $line = $typevalue[$i];
620	if ($line =~ m/^([A-Z]):\s*(.*)/) {
621	    my $type = $1;
622	    my $value = $2;
623	    if ($type eq 'M') {
624		return 1;
625	    }
626	}
627    }
628    return 0;
629}
630
631sub get_maintainers {
632    %email_hash_name = ();
633    %email_hash_address = ();
634    %commit_author_hash = ();
635    %commit_signer_hash = ();
636    @email_to = ();
637    %hash_list_to = ();
638    @list_to = ();
639    @scm = ();
640    @web = ();
641    @subsystem = ();
642    @status = ();
643    %deduplicate_name_hash = ();
644    %deduplicate_address_hash = ();
645    if ($email_git_all_signature_types) {
646	$signature_pattern = "(.+?)[Bb][Yy]:";
647    } else {
648	$signature_pattern = "\(" . join("|", @signature_tags) . "\)";
649    }
650
651    # Find responsible parties
652
653    my %exact_pattern_match_hash = ();
654
655    foreach my $file (@files) {
656
657	my %hash;
658	my $tvi = find_first_section();
659	while ($tvi < @typevalue) {
660	    my $start = find_starting_index($tvi);
661	    my $end = find_ending_index($tvi);
662	    my $exclude = 0;
663	    my $i;
664
665	    #Do not match excluded file patterns
666
667	    for ($i = $start; $i < $end; $i++) {
668		my $line = $typevalue[$i];
669		if ($line =~ m/^([A-Z]):\s*(.*)/) {
670		    my $type = $1;
671		    my $value = $2;
672		    if ($type eq 'X') {
673			if (file_match_pattern($file, $value)) {
674			    $exclude = 1;
675			    last;
676			}
677		    }
678		}
679	    }
680
681	    if (!$exclude) {
682		for ($i = $start; $i < $end; $i++) {
683		    my $line = $typevalue[$i];
684		    if ($line =~ m/^([A-Z]):\s*(.*)/) {
685			my $type = $1;
686			my $value = $2;
687			if ($type eq 'F') {
688			    if (file_match_pattern($file, $value)) {
689				my $value_pd = ($value =~ tr@/@@);
690				my $file_pd = ($file  =~ tr@/@@);
691				$value_pd++ if (substr($value,-1,1) ne "/");
692				$value_pd = -1 if ($value =~ /^\.\*/);
693				if ($value_pd >= $file_pd &&
694				    range_is_maintained($start, $end) &&
695				    range_has_maintainer($start, $end)) {
696				    $exact_pattern_match_hash{$file} = 1;
697				}
698				if ($pattern_depth == 0 ||
699				    (($file_pd - $value_pd) < $pattern_depth)) {
700				    $hash{$tvi} = $value_pd;
701				}
702			    }
703			} elsif ($type eq 'N') {
704			    if ($file =~ m/$value/x) {
705				$hash{$tvi} = 0;
706			    }
707			}
708		    }
709		}
710	    }
711	    $tvi = $end + 1;
712	}
713
714	foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
715	    add_categories($line);
716	    if ($sections) {
717		my $i;
718		my $start = find_starting_index($line);
719		my $end = find_ending_index($line);
720		for ($i = $start; $i < $end; $i++) {
721		    my $line = $typevalue[$i];
722		    if ($line =~ /^[FX]:/) {		##Restore file patterns
723			$line =~ s/([^\\])\.([^\*])/$1\?$2/g;
724			$line =~ s/([^\\])\.$/$1\?/g;	##Convert . back to ?
725			$line =~ s/\\\./\./g;       	##Convert \. to .
726			$line =~ s/\.\*/\*/g;       	##Convert .* to *
727		    }
728		    my $count = $line =~ s/^([A-Z]):/$1:\t/g;
729		    if ($letters eq "" || (!$count || $letters =~ /$1/i)) {
730			print("$line\n");
731		    }
732		}
733		print("\n");
734	    }
735	}
736    }
737
738    if ($keywords) {
739	@keyword_tvi = sort_and_uniq(@keyword_tvi);
740	foreach my $line (@keyword_tvi) {
741	    add_categories($line);
742	}
743    }
744
745    foreach my $email (@email_to, @list_to) {
746	$email->[0] = deduplicate_email($email->[0]);
747    }
748
749    foreach my $file (@files) {
750	if ($email &&
751	    ($email_git || ($email_git_fallback &&
752			    !$exact_pattern_match_hash{$file}))) {
753	    vcs_file_signoffs($file);
754	}
755	if ($email && $email_git_blame) {
756	    vcs_file_blame($file);
757	}
758    }
759
760    if ($email) {
761	foreach my $chief (@penguin_chief) {
762	    if ($chief =~ m/^(.*):(.*)/) {
763		my $email_address;
764
765		$email_address = format_email($1, $2, $email_usename);
766		if ($email_git_penguin_chiefs) {
767		    push(@email_to, [$email_address, 'chief penguin']);
768		} else {
769		    @email_to = grep($_->[0] !~ /${email_address}/, @email_to);
770		}
771	    }
772	}
773
774	foreach my $email (@file_emails) {
775	    my ($name, $address) = parse_email($email);
776
777	    my $tmp_email = format_email($name, $address, $email_usename);
778	    push_email_address($tmp_email, '');
779	    add_role($tmp_email, 'in file');
780	}
781    }
782
783    my @to = ();
784    if ($email || $email_list) {
785	if ($email) {
786	    @to = (@to, @email_to);
787	}
788	if ($email_list) {
789	    @to = (@to, @list_to);
790	}
791    }
792
793    if ($interactive) {
794	@to = interactive_get_maintainers(\@to);
795    }
796
797    return @to;
798}
799
800sub file_match_pattern {
801    my ($file, $pattern) = @_;
802    if (substr($pattern, -1) eq "/") {
803	if ($file =~ m@^$pattern@) {
804	    return 1;
805	}
806    } else {
807	if ($file =~ m@^$pattern@) {
808	    my $s1 = ($file =~ tr@/@@);
809	    my $s2 = ($pattern =~ tr@/@@);
810	    if ($s1 == $s2) {
811		return 1;
812	    }
813	}
814    }
815    return 0;
816}
817
818sub usage {
819    print <<EOT;
820usage: $P [options] patchfile
821       $P [options] -f file|directory
822version: $V
823
824MAINTAINER field selection options:
825  --email => print email address(es) if any
826    --git => include recent git \*-by: signers
827    --git-all-signature-types => include signers regardless of signature type
828        or use only ${signature_pattern} signers (default: $email_git_all_signature_types)
829    --git-fallback => use git when no exact MAINTAINERS pattern (default: $email_git_fallback)
830    --git-chief-penguins => include ${penguin_chiefs}
831    --git-min-signatures => number of signatures required (default: $email_git_min_signatures)
832    --git-max-maintainers => maximum maintainers to add (default: $email_git_max_maintainers)
833    --git-min-percent => minimum percentage of commits required (default: $email_git_min_percent)
834    --git-blame => use git blame to find modified commits for patch or file
835    --git-blame-signatures => when used with --git-blame, also include all commit signers
836    --git-since => git history to use (default: $email_git_since)
837    --hg-since => hg history to use (default: $email_hg_since)
838    --interactive => display a menu (mostly useful if used with the --git option)
839    --m => include maintainer(s) if any
840    --r => include reviewer(s) if any
841    --n => include name 'Full Name <addr\@domain.tld>'
842    --l => include list(s) if any
843    --s => include subscriber only list(s) if any
844    --remove-duplicates => minimize duplicate email names/addresses
845    --roles => show roles (status:subsystem, git-signer, list, etc...)
846    --rolestats => show roles and statistics (commits/total_commits, %)
847    --file-emails => add email addresses found in -f file (default: 0 (off))
848  --scm => print SCM tree(s) if any
849  --status => print status if any
850  --subsystem => print subsystem name if any
851  --web => print website(s) if any
852
853Output type options:
854  --separator [, ] => separator for multiple entries on 1 line
855    using --separator also sets --nomultiline if --separator is not [, ]
856  --multiline => print 1 entry per line
857
858Other options:
859  --pattern-depth => Number of pattern directory traversals (default: 0 (all))
860  --keywords => scan patch for keywords (default: $keywords)
861  --sections => print all of the subsystem sections with pattern matches
862  --letters => print all matching 'letter' types from all matching sections
863  --mailmap => use .mailmap file (default: $email_use_mailmap)
864  --version => show version
865  --help => show this help information
866
867Default options:
868  [--email --nogit --git-fallback --m --r --n --l --multiline --pattern-depth=0
869   --remove-duplicates --rolestats]
870
871Notes:
872  Using "-f directory" may give unexpected results:
873      Used with "--git", git signators for _all_ files in and below
874          directory are examined as git recurses directories.
875          Any specified X: (exclude) pattern matches are _not_ ignored.
876      Used with "--nogit", directory is used as a pattern match,
877          no individual file within the directory or subdirectory
878          is matched.
879      Used with "--git-blame", does not iterate all files in directory
880  Using "--git-blame" is slow and may add old committers and authors
881      that are no longer active maintainers to the output.
882  Using "--roles" or "--rolestats" with git send-email --cc-cmd or any
883      other automated tools that expect only ["name"] <email address>
884      may not work because of additional output after <email address>.
885  Using "--rolestats" and "--git-blame" shows the #/total=% commits,
886      not the percentage of the entire file authored.  # of commits is
887      not a good measure of amount of code authored.  1 major commit may
888      contain a thousand lines, 5 trivial commits may modify a single line.
889  If git is not installed, but mercurial (hg) is installed and an .hg
890      repository exists, the following options apply to mercurial:
891          --git,
892          --git-min-signatures, --git-max-maintainers, --git-min-percent, and
893          --git-blame
894      Use --hg-since not --git-since to control date selection
895  File ".get_maintainer.conf", if it exists in the linux kernel source root
896      directory, can change whatever get_maintainer defaults are desired.
897      Entries in this file can be any command line argument.
898      This file is prepended to any additional command line arguments.
899      Multiple lines and # comments are allowed.
900  Most options have both positive and negative forms.
901      The negative forms for --<foo> are --no<foo> and --no-<foo>.
902
903EOT
904}
905
906sub top_of_kernel_tree {
907    my ($lk_path) = @_;
908
909    if ($lk_path ne "" && substr($lk_path,length($lk_path)-1,1) ne "/") {
910	$lk_path .= "/";
911    }
912    if (   (-f "${lk_path}Kbuild")
913	&& (-e "${lk_path}MAINTAINERS")
914	&& (-f "${lk_path}Makefile")
915	&& (-f "${lk_path}README")
916	&& (-d "${lk_path}arch")
917	&& (-d "${lk_path}board")
918	&& (-d "${lk_path}common")
919	&& (-d "${lk_path}doc")
920	&& (-d "${lk_path}drivers")
921	&& (-d "${lk_path}dts")
922	&& (-d "${lk_path}fs")
923	&& (-d "${lk_path}lib")
924	&& (-d "${lk_path}include")
925	&& (-d "${lk_path}net")
926	&& (-d "${lk_path}post")
927	&& (-d "${lk_path}scripts")
928	&& (-d "${lk_path}test")
929	&& (-d "${lk_path}tools")) {
930	return 1;
931    }
932    return 0;
933}
934
935sub parse_email {
936    my ($formatted_email) = @_;
937
938    my $name = "";
939    my $address = "";
940
941    if ($formatted_email =~ /^([^<]+)<(.+\@.*)>.*$/) {
942	$name = $1;
943	$address = $2;
944    } elsif ($formatted_email =~ /^\s*<(.+\@\S*)>.*$/) {
945	$address = $1;
946    } elsif ($formatted_email =~ /^(.+\@\S*).*$/) {
947	$address = $1;
948    }
949
950    $name =~ s/^\s+|\s+$//g;
951    $name =~ s/^\"|\"$//g;
952    $address =~ s/^\s+|\s+$//g;
953
954    if ($name =~ /[^\w \-]/i) {  	 ##has "must quote" chars
955	$name =~ s/(?<!\\)"/\\"/g;       ##escape quotes
956	$name = "\"$name\"";
957    }
958
959    return ($name, $address);
960}
961
962sub format_email {
963    my ($name, $address, $usename) = @_;
964
965    my $formatted_email;
966
967    $name =~ s/^\s+|\s+$//g;
968    $name =~ s/^\"|\"$//g;
969    $address =~ s/^\s+|\s+$//g;
970
971    if ($name =~ /[^\w \-]/i) {          ##has "must quote" chars
972	$name =~ s/(?<!\\)"/\\"/g;       ##escape quotes
973	$name = "\"$name\"";
974    }
975
976    if ($usename) {
977	if ("$name" eq "") {
978	    $formatted_email = "$address";
979	} else {
980	    $formatted_email = "$name <$address>";
981	}
982    } else {
983	$formatted_email = $address;
984    }
985
986    return $formatted_email;
987}
988
989sub find_first_section {
990    my $index = 0;
991
992    while ($index < @typevalue) {
993	my $tv = $typevalue[$index];
994	if (($tv =~ m/^([A-Z]):\s*(.*)/)) {
995	    last;
996	}
997	$index++;
998    }
999
1000    return $index;
1001}
1002
1003sub find_starting_index {
1004    my ($index) = @_;
1005
1006    while ($index > 0) {
1007	my $tv = $typevalue[$index];
1008	if (!($tv =~ m/^([A-Z]):\s*(.*)/)) {
1009	    last;
1010	}
1011	$index--;
1012    }
1013
1014    return $index;
1015}
1016
1017sub find_ending_index {
1018    my ($index) = @_;
1019
1020    while ($index < @typevalue) {
1021	my $tv = $typevalue[$index];
1022	if (!($tv =~ m/^([A-Z]):\s*(.*)/)) {
1023	    last;
1024	}
1025	$index++;
1026    }
1027
1028    return $index;
1029}
1030
1031sub get_subsystem_name {
1032    my ($index) = @_;
1033
1034    my $start = find_starting_index($index);
1035
1036    my $subsystem = $typevalue[$start];
1037    if ($output_section_maxlen && length($subsystem) > $output_section_maxlen) {
1038	$subsystem = substr($subsystem, 0, $output_section_maxlen - 3);
1039	$subsystem =~ s/\s*$//;
1040	$subsystem = $subsystem . "...";
1041    }
1042    return $subsystem;
1043}
1044
1045sub get_maintainer_role {
1046    my ($index) = @_;
1047
1048    my $i;
1049    my $start = find_starting_index($index);
1050    my $end = find_ending_index($index);
1051
1052    my $role = "unknown";
1053    my $subsystem = get_subsystem_name($index);
1054
1055    for ($i = $start + 1; $i < $end; $i++) {
1056	my $tv = $typevalue[$i];
1057	if ($tv =~ m/^([A-Z]):\s*(.*)/) {
1058	    my $ptype = $1;
1059	    my $pvalue = $2;
1060	    if ($ptype eq "S") {
1061		$role = $pvalue;
1062	    }
1063	}
1064    }
1065
1066    $role = lc($role);
1067    if      ($role eq "supported") {
1068	$role = "supporter";
1069    } elsif ($role eq "maintained") {
1070	$role = "maintainer";
1071    } elsif ($role eq "odd fixes") {
1072	$role = "odd fixer";
1073    } elsif ($role eq "orphan") {
1074	$role = "orphan minder";
1075    } elsif ($role eq "obsolete") {
1076	$role = "obsolete minder";
1077    } elsif ($role eq "buried alive in reporters") {
1078	$role = "chief penguin";
1079    }
1080
1081    return $role . ":" . $subsystem;
1082}
1083
1084sub get_list_role {
1085    my ($index) = @_;
1086
1087    my $subsystem = get_subsystem_name($index);
1088
1089    if ($subsystem eq "THE REST") {
1090	$subsystem = "";
1091    }
1092
1093    return $subsystem;
1094}
1095
1096sub add_categories {
1097    my ($index) = @_;
1098
1099    my $i;
1100    my $start = find_starting_index($index);
1101    my $end = find_ending_index($index);
1102
1103    push(@subsystem, $typevalue[$start]);
1104
1105    for ($i = $start + 1; $i < $end; $i++) {
1106	my $tv = $typevalue[$i];
1107	if ($tv =~ m/^([A-Z]):\s*(.*)/) {
1108	    my $ptype = $1;
1109	    my $pvalue = $2;
1110	    if ($ptype eq "L") {
1111		my $list_address = $pvalue;
1112		my $list_additional = "";
1113		my $list_role = get_list_role($i);
1114
1115		if ($list_role ne "") {
1116		    $list_role = ":" . $list_role;
1117		}
1118		if ($list_address =~ m/([^\s]+)\s+(.*)$/) {
1119		    $list_address = $1;
1120		    $list_additional = $2;
1121		}
1122		if ($list_additional =~ m/subscribers-only/) {
1123		    if ($email_subscriber_list) {
1124			if (!$hash_list_to{lc($list_address)}) {
1125			    $hash_list_to{lc($list_address)} = 1;
1126			    push(@list_to, [$list_address,
1127					    "subscriber list${list_role}"]);
1128			}
1129		    }
1130		} else {
1131		    if ($email_list) {
1132			if (!$hash_list_to{lc($list_address)}) {
1133			    $hash_list_to{lc($list_address)} = 1;
1134			    if ($list_additional =~ m/moderated/) {
1135				push(@list_to, [$list_address,
1136						"moderated list${list_role}"]);
1137			    } else {
1138				push(@list_to, [$list_address,
1139						"open list${list_role}"]);
1140			    }
1141			}
1142		    }
1143		}
1144	    } elsif ($ptype eq "M") {
1145		my ($name, $address) = parse_email($pvalue);
1146		if ($name eq "") {
1147		    if ($i > 0) {
1148			my $tv = $typevalue[$i - 1];
1149			if ($tv =~ m/^([A-Z]):\s*(.*)/) {
1150			    if ($1 eq "P") {
1151				$name = $2;
1152				$pvalue = format_email($name, $address, $email_usename);
1153			    }
1154			}
1155		    }
1156		}
1157		if ($email_maintainer) {
1158		    my $role = get_maintainer_role($i);
1159		    push_email_addresses($pvalue, $role);
1160		}
1161	    } elsif ($ptype eq "R") {
1162		my ($name, $address) = parse_email($pvalue);
1163		if ($name eq "") {
1164		    if ($i > 0) {
1165			my $tv = $typevalue[$i - 1];
1166			if ($tv =~ m/^([A-Z]):\s*(.*)/) {
1167			    if ($1 eq "P") {
1168				$name = $2;
1169				$pvalue = format_email($name, $address, $email_usename);
1170			    }
1171			}
1172		    }
1173		}
1174		if ($email_reviewer) {
1175		    my $subsystem = get_subsystem_name($i);
1176		    push_email_addresses($pvalue, "reviewer:$subsystem");
1177		}
1178	    } elsif ($ptype eq "T") {
1179		push(@scm, $pvalue);
1180	    } elsif ($ptype eq "W") {
1181		push(@web, $pvalue);
1182	    } elsif ($ptype eq "S") {
1183		push(@status, $pvalue);
1184	    }
1185	}
1186    }
1187}
1188
1189sub email_inuse {
1190    my ($name, $address) = @_;
1191
1192    return 1 if (($name eq "") && ($address eq ""));
1193    return 1 if (($name ne "") && exists($email_hash_name{lc($name)}));
1194    return 1 if (($address ne "") && exists($email_hash_address{lc($address)}));
1195
1196    return 0;
1197}
1198
1199sub push_email_address {
1200    my ($line, $role) = @_;
1201
1202    my ($name, $address) = parse_email($line);
1203
1204    if ($address eq "") {
1205	return 0;
1206    }
1207
1208    if (!$email_remove_duplicates) {
1209	push(@email_to, [format_email($name, $address, $email_usename), $role]);
1210    } elsif (!email_inuse($name, $address)) {
1211	push(@email_to, [format_email($name, $address, $email_usename), $role]);
1212	$email_hash_name{lc($name)}++ if ($name ne "");
1213	$email_hash_address{lc($address)}++;
1214    }
1215
1216    return 1;
1217}
1218
1219sub push_email_addresses {
1220    my ($address, $role) = @_;
1221
1222    my @address_list = ();
1223
1224    if (rfc822_valid($address)) {
1225	push_email_address($address, $role);
1226    } elsif (@address_list = rfc822_validlist($address)) {
1227	my $array_count = shift(@address_list);
1228	while (my $entry = shift(@address_list)) {
1229	    push_email_address($entry, $role);
1230	}
1231    } else {
1232	if (!push_email_address($address, $role)) {
1233	    warn("Invalid MAINTAINERS address: '" . $address . "'\n");
1234	}
1235    }
1236}
1237
1238sub add_role {
1239    my ($line, $role) = @_;
1240
1241    my ($name, $address) = parse_email($line);
1242    my $email = format_email($name, $address, $email_usename);
1243
1244    foreach my $entry (@email_to) {
1245	if ($email_remove_duplicates) {
1246	    my ($entry_name, $entry_address) = parse_email($entry->[0]);
1247	    if (($name eq $entry_name || $address eq $entry_address)
1248		&& ($role eq "" || !($entry->[1] =~ m/$role/))
1249	    ) {
1250		if ($entry->[1] eq "") {
1251		    $entry->[1] = "$role";
1252		} else {
1253		    $entry->[1] = "$entry->[1],$role";
1254		}
1255	    }
1256	} else {
1257	    if ($email eq $entry->[0]
1258		&& ($role eq "" || !($entry->[1] =~ m/$role/))
1259	    ) {
1260		if ($entry->[1] eq "") {
1261		    $entry->[1] = "$role";
1262		} else {
1263		    $entry->[1] = "$entry->[1],$role";
1264		}
1265	    }
1266	}
1267    }
1268}
1269
1270sub which {
1271    my ($bin) = @_;
1272
1273    foreach my $path (split(/:/, $ENV{PATH})) {
1274	if (-e "$path/$bin") {
1275	    return "$path/$bin";
1276	}
1277    }
1278
1279    return "";
1280}
1281
1282sub which_conf {
1283    my ($conf) = @_;
1284
1285    foreach my $path (split(/:/, ".:$ENV{HOME}:.scripts")) {
1286	if (-e "$path/$conf") {
1287	    return "$path/$conf";
1288	}
1289    }
1290
1291    return "";
1292}
1293
1294sub mailmap_email {
1295    my ($line) = @_;
1296
1297    my ($name, $address) = parse_email($line);
1298    my $email = format_email($name, $address, 1);
1299    my $real_name = $name;
1300    my $real_address = $address;
1301
1302    if (exists $mailmap->{names}->{$email} ||
1303	exists $mailmap->{addresses}->{$email}) {
1304	if (exists $mailmap->{names}->{$email}) {
1305	    $real_name = $mailmap->{names}->{$email};
1306	}
1307	if (exists $mailmap->{addresses}->{$email}) {
1308	    $real_address = $mailmap->{addresses}->{$email};
1309	}
1310    } else {
1311	if (exists $mailmap->{names}->{$address}) {
1312	    $real_name = $mailmap->{names}->{$address};
1313	}
1314	if (exists $mailmap->{addresses}->{$address}) {
1315	    $real_address = $mailmap->{addresses}->{$address};
1316	}
1317    }
1318    return format_email($real_name, $real_address, 1);
1319}
1320
1321sub mailmap {
1322    my (@addresses) = @_;
1323
1324    my @mapped_emails = ();
1325    foreach my $line (@addresses) {
1326	push(@mapped_emails, mailmap_email($line));
1327    }
1328    merge_by_realname(@mapped_emails) if ($email_use_mailmap);
1329    return @mapped_emails;
1330}
1331
1332sub merge_by_realname {
1333    my %address_map;
1334    my (@emails) = @_;
1335
1336    foreach my $email (@emails) {
1337	my ($name, $address) = parse_email($email);
1338	if (exists $address_map{$name}) {
1339	    $address = $address_map{$name};
1340	    $email = format_email($name, $address, 1);
1341	} else {
1342	    $address_map{$name} = $address;
1343	}
1344    }
1345}
1346
1347sub git_execute_cmd {
1348    my ($cmd) = @_;
1349    my @lines = ();
1350
1351    my $output = `$cmd`;
1352    $output =~ s/^\s*//gm;
1353    @lines = split("\n", $output);
1354
1355    return @lines;
1356}
1357
1358sub hg_execute_cmd {
1359    my ($cmd) = @_;
1360    my @lines = ();
1361
1362    my $output = `$cmd`;
1363    @lines = split("\n", $output);
1364
1365    return @lines;
1366}
1367
1368sub extract_formatted_signatures {
1369    my (@signature_lines) = @_;
1370
1371    my @type = @signature_lines;
1372
1373    s/\s*(.*):.*/$1/ for (@type);
1374
1375    # cut -f2- -d":"
1376    s/\s*.*:\s*(.+)\s*/$1/ for (@signature_lines);
1377
1378## Reformat email addresses (with names) to avoid badly written signatures
1379
1380    foreach my $signer (@signature_lines) {
1381	$signer = deduplicate_email($signer);
1382    }
1383
1384    return (\@type, \@signature_lines);
1385}
1386
1387sub vcs_find_signers {
1388    my ($cmd, $file) = @_;
1389    my $commits;
1390    my @lines = ();
1391    my @signatures = ();
1392    my @authors = ();
1393    my @stats = ();
1394
1395    @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
1396
1397    my $pattern = $VCS_cmds{"commit_pattern"};
1398    my $author_pattern = $VCS_cmds{"author_pattern"};
1399    my $stat_pattern = $VCS_cmds{"stat_pattern"};
1400
1401    $stat_pattern =~ s/(\$\w+)/$1/eeg;		#interpolate $stat_pattern
1402
1403    $commits = grep(/$pattern/, @lines);	# of commits
1404
1405    @authors = grep(/$author_pattern/, @lines);
1406    @signatures = grep(/^[ \t]*${signature_pattern}.*\@.*$/, @lines);
1407    @stats = grep(/$stat_pattern/, @lines);
1408
1409#    print("stats: <@stats>\n");
1410
1411    return (0, \@signatures, \@authors, \@stats) if !@signatures;
1412
1413    save_commits_by_author(@lines) if ($interactive);
1414    save_commits_by_signer(@lines) if ($interactive);
1415
1416    if (!$email_git_penguin_chiefs) {
1417	@signatures = grep(!/${penguin_chiefs}/i, @signatures);
1418    }
1419
1420    my ($author_ref, $authors_ref) = extract_formatted_signatures(@authors);
1421    my ($types_ref, $signers_ref) = extract_formatted_signatures(@signatures);
1422
1423    return ($commits, $signers_ref, $authors_ref, \@stats);
1424}
1425
1426sub vcs_find_author {
1427    my ($cmd) = @_;
1428    my @lines = ();
1429
1430    @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
1431
1432    if (!$email_git_penguin_chiefs) {
1433	@lines = grep(!/${penguin_chiefs}/i, @lines);
1434    }
1435
1436    return @lines if !@lines;
1437
1438    my @authors = ();
1439    foreach my $line (@lines) {
1440	if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
1441	    my $author = $1;
1442	    my ($name, $address) = parse_email($author);
1443	    $author = format_email($name, $address, 1);
1444	    push(@authors, $author);
1445	}
1446    }
1447
1448    save_commits_by_author(@lines) if ($interactive);
1449    save_commits_by_signer(@lines) if ($interactive);
1450
1451    return @authors;
1452}
1453
1454sub vcs_save_commits {
1455    my ($cmd) = @_;
1456    my @lines = ();
1457    my @commits = ();
1458
1459    @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
1460
1461    foreach my $line (@lines) {
1462	if ($line =~ m/$VCS_cmds{"blame_commit_pattern"}/) {
1463	    push(@commits, $1);
1464	}
1465    }
1466
1467    return @commits;
1468}
1469
1470sub vcs_blame {
1471    my ($file) = @_;
1472    my $cmd;
1473    my @commits = ();
1474
1475    return @commits if (!(-f $file));
1476
1477    if (@range && $VCS_cmds{"blame_range_cmd"} eq "") {
1478	my @all_commits = ();
1479
1480	$cmd = $VCS_cmds{"blame_file_cmd"};
1481	$cmd =~ s/(\$\w+)/$1/eeg;		#interpolate $cmd
1482	@all_commits = vcs_save_commits($cmd);
1483
1484	foreach my $file_range_diff (@range) {
1485	    next if (!($file_range_diff =~ m/(.+):(.+):(.+)/));
1486	    my $diff_file = $1;
1487	    my $diff_start = $2;
1488	    my $diff_length = $3;
1489	    next if ("$file" ne "$diff_file");
1490	    for (my $i = $diff_start; $i < $diff_start + $diff_length; $i++) {
1491		push(@commits, $all_commits[$i]);
1492	    }
1493	}
1494    } elsif (@range) {
1495	foreach my $file_range_diff (@range) {
1496	    next if (!($file_range_diff =~ m/(.+):(.+):(.+)/));
1497	    my $diff_file = $1;
1498	    my $diff_start = $2;
1499	    my $diff_length = $3;
1500	    next if ("$file" ne "$diff_file");
1501	    $cmd = $VCS_cmds{"blame_range_cmd"};
1502	    $cmd =~ s/(\$\w+)/$1/eeg;		#interpolate $cmd
1503	    push(@commits, vcs_save_commits($cmd));
1504	}
1505    } else {
1506	$cmd = $VCS_cmds{"blame_file_cmd"};
1507	$cmd =~ s/(\$\w+)/$1/eeg;		#interpolate $cmd
1508	@commits = vcs_save_commits($cmd);
1509    }
1510
1511    foreach my $commit (@commits) {
1512	$commit =~ s/^\^//g;
1513    }
1514
1515    return @commits;
1516}
1517
1518my $printed_novcs = 0;
1519sub vcs_exists {
1520    %VCS_cmds = %VCS_cmds_git;
1521    return 1 if eval $VCS_cmds{"available"};
1522    %VCS_cmds = %VCS_cmds_hg;
1523    return 2 if eval $VCS_cmds{"available"};
1524    %VCS_cmds = ();
1525    if (!$printed_novcs) {
1526	warn("$P: No supported VCS found.  Add --nogit to options?\n");
1527	warn("Using a git repository produces better results.\n");
1528	warn("Try Linus Torvalds' latest git repository using:\n");
1529	warn("git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git\n");
1530	$printed_novcs = 1;
1531    }
1532    return 0;
1533}
1534
1535sub vcs_is_git {
1536    vcs_exists();
1537    return $vcs_used == 1;
1538}
1539
1540sub vcs_is_hg {
1541    return $vcs_used == 2;
1542}
1543
1544sub interactive_get_maintainers {
1545    my ($list_ref) = @_;
1546    my @list = @$list_ref;
1547
1548    vcs_exists();
1549
1550    my %selected;
1551    my %authored;
1552    my %signed;
1553    my $count = 0;
1554    my $maintained = 0;
1555    foreach my $entry (@list) {
1556	$maintained = 1 if ($entry->[1] =~ /^(maintainer|supporter)/i);
1557	$selected{$count} = 1;
1558	$authored{$count} = 0;
1559	$signed{$count} = 0;
1560	$count++;
1561    }
1562
1563    #menu loop
1564    my $done = 0;
1565    my $print_options = 0;
1566    my $redraw = 1;
1567    while (!$done) {
1568	$count = 0;
1569	if ($redraw) {
1570	    printf STDERR "\n%1s %2s %-65s",
1571			  "*", "#", "email/list and role:stats";
1572	    if ($email_git ||
1573		($email_git_fallback && !$maintained) ||
1574		$email_git_blame) {
1575		print STDERR "auth sign";
1576	    }
1577	    print STDERR "\n";
1578	    foreach my $entry (@list) {
1579		my $email = $entry->[0];
1580		my $role = $entry->[1];
1581		my $sel = "";
1582		$sel = "*" if ($selected{$count});
1583		my $commit_author = $commit_author_hash{$email};
1584		my $commit_signer = $commit_signer_hash{$email};
1585		my $authored = 0;
1586		my $signed = 0;
1587		$authored++ for (@{$commit_author});
1588		$signed++ for (@{$commit_signer});
1589		printf STDERR "%1s %2d %-65s", $sel, $count + 1, $email;
1590		printf STDERR "%4d %4d", $authored, $signed
1591		    if ($authored > 0 || $signed > 0);
1592		printf STDERR "\n     %s\n", $role;
1593		if ($authored{$count}) {
1594		    my $commit_author = $commit_author_hash{$email};
1595		    foreach my $ref (@{$commit_author}) {
1596			print STDERR "     Author: @{$ref}[1]\n";
1597		    }
1598		}
1599		if ($signed{$count}) {
1600		    my $commit_signer = $commit_signer_hash{$email};
1601		    foreach my $ref (@{$commit_signer}) {
1602			print STDERR "     @{$ref}[2]: @{$ref}[1]\n";
1603		    }
1604		}
1605
1606		$count++;
1607	    }
1608	}
1609	my $date_ref = \$email_git_since;
1610	$date_ref = \$email_hg_since if (vcs_is_hg());
1611	if ($print_options) {
1612	    $print_options = 0;
1613	    if (vcs_exists()) {
1614		print STDERR <<EOT
1615
1616Version Control options:
1617g  use git history      [$email_git]
1618gf use git-fallback     [$email_git_fallback]
1619b  use git blame        [$email_git_blame]
1620bs use blame signatures [$email_git_blame_signatures]
1621c# minimum commits      [$email_git_min_signatures]
1622%# min percent          [$email_git_min_percent]
1623d# history to use       [$$date_ref]
1624x# max maintainers      [$email_git_max_maintainers]
1625t  all signature types  [$email_git_all_signature_types]
1626m  use .mailmap         [$email_use_mailmap]
1627EOT
1628	    }
1629	    print STDERR <<EOT
1630
1631Additional options:
16320  toggle all
1633tm toggle maintainers
1634tg toggle git entries
1635tl toggle open list entries
1636ts toggle subscriber list entries
1637f  emails in file       [$file_emails]
1638k  keywords in file     [$keywords]
1639r  remove duplicates    [$email_remove_duplicates]
1640p# pattern match depth  [$pattern_depth]
1641EOT
1642	}
1643	print STDERR
1644"\n#(toggle), A#(author), S#(signed) *(all), ^(none), O(options), Y(approve): ";
1645
1646	my $input = <STDIN>;
1647	chomp($input);
1648
1649	$redraw = 1;
1650	my $rerun = 0;
1651	my @wish = split(/[, ]+/, $input);
1652	foreach my $nr (@wish) {
1653	    $nr = lc($nr);
1654	    my $sel = substr($nr, 0, 1);
1655	    my $str = substr($nr, 1);
1656	    my $val = 0;
1657	    $val = $1 if $str =~ /^(\d+)$/;
1658
1659	    if ($sel eq "y") {
1660		$interactive = 0;
1661		$done = 1;
1662		$output_rolestats = 0;
1663		$output_roles = 0;
1664		last;
1665	    } elsif ($nr =~ /^\d+$/ && $nr > 0 && $nr <= $count) {
1666		$selected{$nr - 1} = !$selected{$nr - 1};
1667	    } elsif ($sel eq "*" || $sel eq '^') {
1668		my $toggle = 0;
1669		$toggle = 1 if ($sel eq '*');
1670		for (my $i = 0; $i < $count; $i++) {
1671		    $selected{$i} = $toggle;
1672		}
1673	    } elsif ($sel eq "0") {
1674		for (my $i = 0; $i < $count; $i++) {
1675		    $selected{$i} = !$selected{$i};
1676		}
1677	    } elsif ($sel eq "t") {
1678		if (lc($str) eq "m") {
1679		    for (my $i = 0; $i < $count; $i++) {
1680			$selected{$i} = !$selected{$i}
1681			    if ($list[$i]->[1] =~ /^(maintainer|supporter)/i);
1682		    }
1683		} elsif (lc($str) eq "g") {
1684		    for (my $i = 0; $i < $count; $i++) {
1685			$selected{$i} = !$selected{$i}
1686			    if ($list[$i]->[1] =~ /^(author|commit|signer)/i);
1687		    }
1688		} elsif (lc($str) eq "l") {
1689		    for (my $i = 0; $i < $count; $i++) {
1690			$selected{$i} = !$selected{$i}
1691			    if ($list[$i]->[1] =~ /^(open list)/i);
1692		    }
1693		} elsif (lc($str) eq "s") {
1694		    for (my $i = 0; $i < $count; $i++) {
1695			$selected{$i} = !$selected{$i}
1696			    if ($list[$i]->[1] =~ /^(subscriber list)/i);
1697		    }
1698		}
1699	    } elsif ($sel eq "a") {
1700		if ($val > 0 && $val <= $count) {
1701		    $authored{$val - 1} = !$authored{$val - 1};
1702		} elsif ($str eq '*' || $str eq '^') {
1703		    my $toggle = 0;
1704		    $toggle = 1 if ($str eq '*');
1705		    for (my $i = 0; $i < $count; $i++) {
1706			$authored{$i} = $toggle;
1707		    }
1708		}
1709	    } elsif ($sel eq "s") {
1710		if ($val > 0 && $val <= $count) {
1711		    $signed{$val - 1} = !$signed{$val - 1};
1712		} elsif ($str eq '*' || $str eq '^') {
1713		    my $toggle = 0;
1714		    $toggle = 1 if ($str eq '*');
1715		    for (my $i = 0; $i < $count; $i++) {
1716			$signed{$i} = $toggle;
1717		    }
1718		}
1719	    } elsif ($sel eq "o") {
1720		$print_options = 1;
1721		$redraw = 1;
1722	    } elsif ($sel eq "g") {
1723		if ($str eq "f") {
1724		    bool_invert(\$email_git_fallback);
1725		} else {
1726		    bool_invert(\$email_git);
1727		}
1728		$rerun = 1;
1729	    } elsif ($sel eq "b") {
1730		if ($str eq "s") {
1731		    bool_invert(\$email_git_blame_signatures);
1732		} else {
1733		    bool_invert(\$email_git_blame);
1734		}
1735		$rerun = 1;
1736	    } elsif ($sel eq "c") {
1737		if ($val > 0) {
1738		    $email_git_min_signatures = $val;
1739		    $rerun = 1;
1740		}
1741	    } elsif ($sel eq "x") {
1742		if ($val > 0) {
1743		    $email_git_max_maintainers = $val;
1744		    $rerun = 1;
1745		}
1746	    } elsif ($sel eq "%") {
1747		if ($str ne "" && $val >= 0) {
1748		    $email_git_min_percent = $val;
1749		    $rerun = 1;
1750		}
1751	    } elsif ($sel eq "d") {
1752		if (vcs_is_git()) {
1753		    $email_git_since = $str;
1754		} elsif (vcs_is_hg()) {
1755		    $email_hg_since = $str;
1756		}
1757		$rerun = 1;
1758	    } elsif ($sel eq "t") {
1759		bool_invert(\$email_git_all_signature_types);
1760		$rerun = 1;
1761	    } elsif ($sel eq "f") {
1762		bool_invert(\$file_emails);
1763		$rerun = 1;
1764	    } elsif ($sel eq "r") {
1765		bool_invert(\$email_remove_duplicates);
1766		$rerun = 1;
1767	    } elsif ($sel eq "m") {
1768		bool_invert(\$email_use_mailmap);
1769		read_mailmap();
1770		$rerun = 1;
1771	    } elsif ($sel eq "k") {
1772		bool_invert(\$keywords);
1773		$rerun = 1;
1774	    } elsif ($sel eq "p") {
1775		if ($str ne "" && $val >= 0) {
1776		    $pattern_depth = $val;
1777		    $rerun = 1;
1778		}
1779	    } elsif ($sel eq "h" || $sel eq "?") {
1780		print STDERR <<EOT
1781
1782Interactive mode allows you to select the various maintainers, submitters,
1783commit signers and mailing lists that could be CC'd on a patch.
1784
1785Any *'d entry is selected.
1786
1787If you have git or hg installed, you can choose to summarize the commit
1788history of files in the patch.  Also, each line of the current file can
1789be matched to its commit author and that commits signers with blame.
1790
1791Various knobs exist to control the length of time for active commit
1792tracking, the maximum number of commit authors and signers to add,
1793and such.
1794
1795Enter selections at the prompt until you are satisfied that the selected
1796maintainers are appropriate.  You may enter multiple selections separated
1797by either commas or spaces.
1798
1799EOT
1800	    } else {
1801		print STDERR "invalid option: '$nr'\n";
1802		$redraw = 0;
1803	    }
1804	}
1805	if ($rerun) {
1806	    print STDERR "git-blame can be very slow, please have patience..."
1807		if ($email_git_blame);
1808	    goto &get_maintainers;
1809	}
1810    }
1811
1812    #drop not selected entries
1813    $count = 0;
1814    my @new_emailto = ();
1815    foreach my $entry (@list) {
1816	if ($selected{$count}) {
1817	    push(@new_emailto, $list[$count]);
1818	}
1819	$count++;
1820    }
1821    return @new_emailto;
1822}
1823
1824sub bool_invert {
1825    my ($bool_ref) = @_;
1826
1827    if ($$bool_ref) {
1828	$$bool_ref = 0;
1829    } else {
1830	$$bool_ref = 1;
1831    }
1832}
1833
1834sub deduplicate_email {
1835    my ($email) = @_;
1836
1837    my $matched = 0;
1838    my ($name, $address) = parse_email($email);
1839    $email = format_email($name, $address, 1);
1840    $email = mailmap_email($email);
1841
1842    return $email if (!$email_remove_duplicates);
1843
1844    ($name, $address) = parse_email($email);
1845
1846    if ($name ne "" && $deduplicate_name_hash{lc($name)}) {
1847	$name = $deduplicate_name_hash{lc($name)}->[0];
1848	$address = $deduplicate_name_hash{lc($name)}->[1];
1849	$matched = 1;
1850    } elsif ($deduplicate_address_hash{lc($address)}) {
1851	$name = $deduplicate_address_hash{lc($address)}->[0];
1852	$address = $deduplicate_address_hash{lc($address)}->[1];
1853	$matched = 1;
1854    }
1855    if (!$matched) {
1856	$deduplicate_name_hash{lc($name)} = [ $name, $address ];
1857	$deduplicate_address_hash{lc($address)} = [ $name, $address ];
1858    }
1859    $email = format_email($name, $address, 1);
1860    $email = mailmap_email($email);
1861    return $email;
1862}
1863
1864sub save_commits_by_author {
1865    my (@lines) = @_;
1866
1867    my @authors = ();
1868    my @commits = ();
1869    my @subjects = ();
1870
1871    foreach my $line (@lines) {
1872	if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
1873	    my $author = $1;
1874	    $author = deduplicate_email($author);
1875	    push(@authors, $author);
1876	}
1877	push(@commits, $1) if ($line =~ m/$VCS_cmds{"commit_pattern"}/);
1878	push(@subjects, $1) if ($line =~ m/$VCS_cmds{"subject_pattern"}/);
1879    }
1880
1881    for (my $i = 0; $i < @authors; $i++) {
1882	my $exists = 0;
1883	foreach my $ref(@{$commit_author_hash{$authors[$i]}}) {
1884	    if (@{$ref}[0] eq $commits[$i] &&
1885		@{$ref}[1] eq $subjects[$i]) {
1886		$exists = 1;
1887		last;
1888	    }
1889	}
1890	if (!$exists) {
1891	    push(@{$commit_author_hash{$authors[$i]}},
1892		 [ ($commits[$i], $subjects[$i]) ]);
1893	}
1894    }
1895}
1896
1897sub save_commits_by_signer {
1898    my (@lines) = @_;
1899
1900    my $commit = "";
1901    my $subject = "";
1902
1903    foreach my $line (@lines) {
1904	$commit = $1 if ($line =~ m/$VCS_cmds{"commit_pattern"}/);
1905	$subject = $1 if ($line =~ m/$VCS_cmds{"subject_pattern"}/);
1906	if ($line =~ /^[ \t]*${signature_pattern}.*\@.*$/) {
1907	    my @signatures = ($line);
1908	    my ($types_ref, $signers_ref) = extract_formatted_signatures(@signatures);
1909	    my @types = @$types_ref;
1910	    my @signers = @$signers_ref;
1911
1912	    my $type = $types[0];
1913	    my $signer = $signers[0];
1914
1915	    $signer = deduplicate_email($signer);
1916
1917	    my $exists = 0;
1918	    foreach my $ref(@{$commit_signer_hash{$signer}}) {
1919		if (@{$ref}[0] eq $commit &&
1920		    @{$ref}[1] eq $subject &&
1921		    @{$ref}[2] eq $type) {
1922		    $exists = 1;
1923		    last;
1924		}
1925	    }
1926	    if (!$exists) {
1927		push(@{$commit_signer_hash{$signer}},
1928		     [ ($commit, $subject, $type) ]);
1929	    }
1930	}
1931    }
1932}
1933
1934sub vcs_assign {
1935    my ($role, $divisor, @lines) = @_;
1936
1937    my %hash;
1938    my $count = 0;
1939
1940    return if (@lines <= 0);
1941
1942    if ($divisor <= 0) {
1943	warn("Bad divisor in " . (caller(0))[3] . ": $divisor\n");
1944	$divisor = 1;
1945    }
1946
1947    @lines = mailmap(@lines);
1948
1949    return if (@lines <= 0);
1950
1951    @lines = sort(@lines);
1952
1953    # uniq -c
1954    $hash{$_}++ for @lines;
1955
1956    # sort -rn
1957    foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
1958	my $sign_offs = $hash{$line};
1959	my $percent = $sign_offs * 100 / $divisor;
1960
1961	$percent = 100 if ($percent > 100);
1962	next if (ignore_email_address($line));
1963	$count++;
1964	last if ($sign_offs < $email_git_min_signatures ||
1965		 $count > $email_git_max_maintainers ||
1966		 $percent < $email_git_min_percent);
1967	push_email_address($line, '');
1968	if ($output_rolestats) {
1969	    my $fmt_percent = sprintf("%.0f", $percent);
1970	    add_role($line, "$role:$sign_offs/$divisor=$fmt_percent%");
1971	} else {
1972	    add_role($line, $role);
1973	}
1974    }
1975}
1976
1977sub vcs_file_signoffs {
1978    my ($file) = @_;
1979
1980    my $authors_ref;
1981    my $signers_ref;
1982    my $stats_ref;
1983    my @authors = ();
1984    my @signers = ();
1985    my @stats = ();
1986    my $commits;
1987
1988    $vcs_used = vcs_exists();
1989    return if (!$vcs_used);
1990
1991    my $cmd = $VCS_cmds{"find_signers_cmd"};
1992    $cmd =~ s/(\$\w+)/$1/eeg;		# interpolate $cmd
1993
1994    ($commits, $signers_ref, $authors_ref, $stats_ref) = vcs_find_signers($cmd, $file);
1995
1996    @signers = @{$signers_ref} if defined $signers_ref;
1997    @authors = @{$authors_ref} if defined $authors_ref;
1998    @stats = @{$stats_ref} if defined $stats_ref;
1999
2000#    print("commits: <$commits>\nsigners:<@signers>\nauthors: <@authors>\nstats: <@stats>\n");
2001
2002    foreach my $signer (@signers) {
2003	$signer = deduplicate_email($signer);
2004    }
2005
2006    vcs_assign("commit_signer", $commits, @signers);
2007    vcs_assign("authored", $commits, @authors);
2008    if ($#authors == $#stats) {
2009	my $stat_pattern = $VCS_cmds{"stat_pattern"};
2010	$stat_pattern =~ s/(\$\w+)/$1/eeg;	#interpolate $stat_pattern
2011
2012	my $added = 0;
2013	my $deleted = 0;
2014	for (my $i = 0; $i <= $#stats; $i++) {
2015	    if ($stats[$i] =~ /$stat_pattern/) {
2016		$added += $1;
2017		$deleted += $2;
2018	    }
2019	}
2020	my @tmp_authors = uniq(@authors);
2021	foreach my $author (@tmp_authors) {
2022	    $author = deduplicate_email($author);
2023	}
2024	@tmp_authors = uniq(@tmp_authors);
2025	my @list_added = ();
2026	my @list_deleted = ();
2027	foreach my $author (@tmp_authors) {
2028	    my $auth_added = 0;
2029	    my $auth_deleted = 0;
2030	    for (my $i = 0; $i <= $#stats; $i++) {
2031		if ($author eq deduplicate_email($authors[$i]) &&
2032		    $stats[$i] =~ /$stat_pattern/) {
2033		    $auth_added += $1;
2034		    $auth_deleted += $2;
2035		}
2036	    }
2037	    for (my $i = 0; $i < $auth_added; $i++) {
2038		push(@list_added, $author);
2039	    }
2040	    for (my $i = 0; $i < $auth_deleted; $i++) {
2041		push(@list_deleted, $author);
2042	    }
2043	}
2044	vcs_assign("added_lines", $added, @list_added);
2045	vcs_assign("removed_lines", $deleted, @list_deleted);
2046    }
2047}
2048
2049sub vcs_file_blame {
2050    my ($file) = @_;
2051
2052    my @signers = ();
2053    my @all_commits = ();
2054    my @commits = ();
2055    my $total_commits;
2056    my $total_lines;
2057
2058    $vcs_used = vcs_exists();
2059    return if (!$vcs_used);
2060
2061    @all_commits = vcs_blame($file);
2062    @commits = uniq(@all_commits);
2063    $total_commits = @commits;
2064    $total_lines = @all_commits;
2065
2066    if ($email_git_blame_signatures) {
2067	if (vcs_is_hg()) {
2068	    my $commit_count;
2069	    my $commit_authors_ref;
2070	    my $commit_signers_ref;
2071	    my $stats_ref;
2072	    my @commit_authors = ();
2073	    my @commit_signers = ();
2074	    my $commit = join(" -r ", @commits);
2075	    my $cmd;
2076
2077	    $cmd = $VCS_cmds{"find_commit_signers_cmd"};
2078	    $cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
2079
2080	    ($commit_count, $commit_signers_ref, $commit_authors_ref, $stats_ref) = vcs_find_signers($cmd, $file);
2081	    @commit_authors = @{$commit_authors_ref} if defined $commit_authors_ref;
2082	    @commit_signers = @{$commit_signers_ref} if defined $commit_signers_ref;
2083
2084	    push(@signers, @commit_signers);
2085	} else {
2086	    foreach my $commit (@commits) {
2087		my $commit_count;
2088		my $commit_authors_ref;
2089		my $commit_signers_ref;
2090		my $stats_ref;
2091		my @commit_authors = ();
2092		my @commit_signers = ();
2093		my $cmd;
2094
2095		$cmd = $VCS_cmds{"find_commit_signers_cmd"};
2096		$cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
2097
2098		($commit_count, $commit_signers_ref, $commit_authors_ref, $stats_ref) = vcs_find_signers($cmd, $file);
2099		@commit_authors = @{$commit_authors_ref} if defined $commit_authors_ref;
2100		@commit_signers = @{$commit_signers_ref} if defined $commit_signers_ref;
2101
2102		push(@signers, @commit_signers);
2103	    }
2104	}
2105    }
2106
2107    if ($from_filename) {
2108	if ($output_rolestats) {
2109	    my @blame_signers;
2110	    if (vcs_is_hg()) {{		# Double brace for last exit
2111		my $commit_count;
2112		my @commit_signers = ();
2113		@commits = uniq(@commits);
2114		@commits = sort(@commits);
2115		my $commit = join(" -r ", @commits);
2116		my $cmd;
2117
2118		$cmd = $VCS_cmds{"find_commit_author_cmd"};
2119		$cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
2120
2121		my @lines = ();
2122
2123		@lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
2124
2125		if (!$email_git_penguin_chiefs) {
2126		    @lines = grep(!/${penguin_chiefs}/i, @lines);
2127		}
2128
2129		last if !@lines;
2130
2131		my @authors = ();
2132		foreach my $line (@lines) {
2133		    if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
2134			my $author = $1;
2135			$author = deduplicate_email($author);
2136			push(@authors, $author);
2137		    }
2138		}
2139
2140		save_commits_by_author(@lines) if ($interactive);
2141		save_commits_by_signer(@lines) if ($interactive);
2142
2143		push(@signers, @authors);
2144	    }}
2145	    else {
2146		foreach my $commit (@commits) {
2147		    my $i;
2148		    my $cmd = $VCS_cmds{"find_commit_author_cmd"};
2149		    $cmd =~ s/(\$\w+)/$1/eeg;	#interpolate $cmd
2150		    my @author = vcs_find_author($cmd);
2151		    next if !@author;
2152
2153		    my $formatted_author = deduplicate_email($author[0]);
2154
2155		    my $count = grep(/$commit/, @all_commits);
2156		    for ($i = 0; $i < $count ; $i++) {
2157			push(@blame_signers, $formatted_author);
2158		    }
2159		}
2160	    }
2161	    if (@blame_signers) {
2162		vcs_assign("authored lines", $total_lines, @blame_signers);
2163	    }
2164	}
2165	foreach my $signer (@signers) {
2166	    $signer = deduplicate_email($signer);
2167	}
2168	vcs_assign("commits", $total_commits, @signers);
2169    } else {
2170	foreach my $signer (@signers) {
2171	    $signer = deduplicate_email($signer);
2172	}
2173	vcs_assign("modified commits", $total_commits, @signers);
2174    }
2175}
2176
2177sub vcs_file_exists {
2178    my ($file) = @_;
2179
2180    my $exists;
2181
2182    my $vcs_used = vcs_exists();
2183    return 0 if (!$vcs_used);
2184
2185    my $cmd = $VCS_cmds{"file_exists_cmd"};
2186    $cmd =~ s/(\$\w+)/$1/eeg;		# interpolate $cmd
2187    $cmd .= " 2>&1";
2188    $exists = &{$VCS_cmds{"execute_cmd"}}($cmd);
2189
2190    return 0 if ($? != 0);
2191
2192    return $exists;
2193}
2194
2195sub uniq {
2196    my (@parms) = @_;
2197
2198    my %saw;
2199    @parms = grep(!$saw{$_}++, @parms);
2200    return @parms;
2201}
2202
2203sub sort_and_uniq {
2204    my (@parms) = @_;
2205
2206    my %saw;
2207    @parms = sort @parms;
2208    @parms = grep(!$saw{$_}++, @parms);
2209    return @parms;
2210}
2211
2212sub clean_file_emails {
2213    my (@file_emails) = @_;
2214    my @fmt_emails = ();
2215
2216    foreach my $email (@file_emails) {
2217	$email =~ s/[\(\<\{]{0,1}([A-Za-z0-9_\.\+-]+\@[A-Za-z0-9\.-]+)[\)\>\}]{0,1}/\<$1\>/g;
2218	my ($name, $address) = parse_email($email);
2219	if ($name eq '"[,\.]"') {
2220	    $name = "";
2221	}
2222
2223	my @nw = split(/[^A-Za-zÀ-ÿ\'\,\.\+-]/, $name);
2224	if (@nw > 2) {
2225	    my $first = $nw[@nw - 3];
2226	    my $middle = $nw[@nw - 2];
2227	    my $last = $nw[@nw - 1];
2228
2229	    if (((length($first) == 1 && $first =~ m/[A-Za-z]/) ||
2230		 (length($first) == 2 && substr($first, -1) eq ".")) ||
2231		(length($middle) == 1 ||
2232		 (length($middle) == 2 && substr($middle, -1) eq "."))) {
2233		$name = "$first $middle $last";
2234	    } else {
2235		$name = "$middle $last";
2236	    }
2237	}
2238
2239	if (substr($name, -1) =~ /[,\.]/) {
2240	    $name = substr($name, 0, length($name) - 1);
2241	} elsif (substr($name, -2) =~ /[,\.]"/) {
2242	    $name = substr($name, 0, length($name) - 2) . '"';
2243	}
2244
2245	if (substr($name, 0, 1) =~ /[,\.]/) {
2246	    $name = substr($name, 1, length($name) - 1);
2247	} elsif (substr($name, 0, 2) =~ /"[,\.]/) {
2248	    $name = '"' . substr($name, 2, length($name) - 2);
2249	}
2250
2251	my $fmt_email = format_email($name, $address, $email_usename);
2252	push(@fmt_emails, $fmt_email);
2253    }
2254    return @fmt_emails;
2255}
2256
2257sub merge_email {
2258    my @lines;
2259    my %saw;
2260
2261    for (@_) {
2262	my ($address, $role) = @$_;
2263	if (!$saw{$address}) {
2264	    if ($output_roles) {
2265		push(@lines, "$address ($role)");
2266	    } else {
2267		push(@lines, $address);
2268	    }
2269	    $saw{$address} = 1;
2270	}
2271    }
2272
2273    return @lines;
2274}
2275
2276sub output {
2277    my (@parms) = @_;
2278
2279    if ($output_multiline) {
2280	foreach my $line (@parms) {
2281	    print("${line}\n");
2282	}
2283    } else {
2284	print(join($output_separator, @parms));
2285	print("\n");
2286    }
2287}
2288
2289my $rfc822re;
2290
2291sub make_rfc822re {
2292#   Basic lexical tokens are specials, domain_literal, quoted_string, atom, and
2293#   comment.  We must allow for rfc822_lwsp (or comments) after each of these.
2294#   This regexp will only work on addresses which have had comments stripped
2295#   and replaced with rfc822_lwsp.
2296
2297    my $specials = '()<>@,;:\\\\".\\[\\]';
2298    my $controls = '\\000-\\037\\177';
2299
2300    my $dtext = "[^\\[\\]\\r\\\\]";
2301    my $domain_literal = "\\[(?:$dtext|\\\\.)*\\]$rfc822_lwsp*";
2302
2303    my $quoted_string = "\"(?:[^\\\"\\r\\\\]|\\\\.|$rfc822_lwsp)*\"$rfc822_lwsp*";
2304
2305#   Use zero-width assertion to spot the limit of an atom.  A simple
2306#   $rfc822_lwsp* causes the regexp engine to hang occasionally.
2307    my $atom = "[^$specials $controls]+(?:$rfc822_lwsp+|\\Z|(?=[\\[\"$specials]))";
2308    my $word = "(?:$atom|$quoted_string)";
2309    my $localpart = "$word(?:\\.$rfc822_lwsp*$word)*";
2310
2311    my $sub_domain = "(?:$atom|$domain_literal)";
2312    my $domain = "$sub_domain(?:\\.$rfc822_lwsp*$sub_domain)*";
2313
2314    my $addr_spec = "$localpart\@$rfc822_lwsp*$domain";
2315
2316    my $phrase = "$word*";
2317    my $route = "(?:\@$domain(?:,\@$rfc822_lwsp*$domain)*:$rfc822_lwsp*)";
2318    my $route_addr = "\\<$rfc822_lwsp*$route?$addr_spec\\>$rfc822_lwsp*";
2319    my $mailbox = "(?:$addr_spec|$phrase$route_addr)";
2320
2321    my $group = "$phrase:$rfc822_lwsp*(?:$mailbox(?:,\\s*$mailbox)*)?;\\s*";
2322    my $address = "(?:$mailbox|$group)";
2323
2324    return "$rfc822_lwsp*$address";
2325}
2326
2327sub rfc822_strip_comments {
2328    my $s = shift;
2329#   Recursively remove comments, and replace with a single space.  The simpler
2330#   regexps in the Email Addressing FAQ are imperfect - they will miss escaped
2331#   chars in atoms, for example.
2332
2333    while ($s =~ s/^((?:[^"\\]|\\.)*
2334                    (?:"(?:[^"\\]|\\.)*"(?:[^"\\]|\\.)*)*)
2335                    \((?:[^()\\]|\\.)*\)/$1 /osx) {}
2336    return $s;
2337}
2338
2339#   valid: returns true if the parameter is an RFC822 valid address
2340#
2341sub rfc822_valid {
2342    my $s = rfc822_strip_comments(shift);
2343
2344    if (!$rfc822re) {
2345        $rfc822re = make_rfc822re();
2346    }
2347
2348    return $s =~ m/^$rfc822re$/so && $s =~ m/^$rfc822_char*$/;
2349}
2350
2351#   validlist: In scalar context, returns true if the parameter is an RFC822
2352#              valid list of addresses.
2353#
2354#              In list context, returns an empty list on failure (an invalid
2355#              address was found); otherwise a list whose first element is the
2356#              number of addresses found and whose remaining elements are the
2357#              addresses.  This is needed to disambiguate failure (invalid)
2358#              from success with no addresses found, because an empty string is
2359#              a valid list.
2360
2361sub rfc822_validlist {
2362    my $s = rfc822_strip_comments(shift);
2363
2364    if (!$rfc822re) {
2365        $rfc822re = make_rfc822re();
2366    }
2367    # * null list items are valid according to the RFC
2368    # * the '1' business is to aid in distinguishing failure from no results
2369
2370    my @r;
2371    if ($s =~ m/^(?:$rfc822re)?(?:,(?:$rfc822re)?)*$/so &&
2372	$s =~ m/^$rfc822_char*$/) {
2373        while ($s =~ m/(?:^|,$rfc822_lwsp*)($rfc822re)/gos) {
2374            push(@r, $1);
2375        }
2376        return wantarray ? (scalar(@r), @r) : 1;
2377    }
2378    return wantarray ? () : 0;
2379}
2380