xref: /qemu/scripts/get_maintainer.pl (revision bfa3ab61)
1#!/usr/bin/perl -w
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 strict;
14
15my $P = $0;
16my $V = '0.26';
17
18use Getopt::Long qw(:config no_auto_abbrev);
19
20my $lk_path = "./";
21my $email = 1;
22my $email_usename = 1;
23my $email_maintainer = 1;
24my $email_list = 1;
25my $email_subscriber_list = 0;
26my $email_git = 0;
27my $email_git_all_signature_types = 0;
28my $email_git_blame = 0;
29my $email_git_blame_signatures = 1;
30my $email_git_fallback = 1;
31my $email_git_min_signatures = 1;
32my $email_git_max_maintainers = 5;
33my $email_git_min_percent = 5;
34my $email_git_since = "1-year-ago";
35my $email_hg_since = "-365";
36my $interactive = 0;
37my $email_remove_duplicates = 1;
38my $email_use_mailmap = 1;
39my $output_multiline = 1;
40my $output_separator = ", ";
41my $output_roles = 0;
42my $output_rolestats = 1;
43my $scm = 0;
44my $web = 0;
45my $subsystem = 0;
46my $status = 0;
47my $keywords = 1;
48my $sections = 0;
49my $file_emails = 0;
50my $from_filename = 0;
51my $pattern_depth = 0;
52my $version = 0;
53my $help = 0;
54
55my $vcs_used = 0;
56
57my $exit = 0;
58
59my %commit_author_hash;
60my %commit_signer_hash;
61
62# Signature types of people who are either
63# 	a) responsible for the code in question, or
64# 	b) familiar enough with it to give relevant feedback
65my @signature_tags = ();
66push(@signature_tags, "Signed-off-by:");
67push(@signature_tags, "Reviewed-by:");
68push(@signature_tags, "Acked-by:");
69
70my $signature_pattern = "\(" . join("|", @signature_tags) . "\)";
71
72# rfc822 email address - preloaded methods go here.
73my $rfc822_lwsp = "(?:(?:\\r\\n)?[ \\t])";
74my $rfc822_char = '[\\000-\\377]';
75
76# VCS command support: class-like functions and strings
77
78my %VCS_cmds;
79
80my %VCS_cmds_git = (
81    "execute_cmd" => \&git_execute_cmd,
82    "available" => '(which("git") ne "") && (-d ".git")',
83    "find_signers_cmd" =>
84	"git log --no-color --follow --since=\$email_git_since " .
85	    '--format="GitCommit: %H%n' .
86		      'GitAuthor: %an <%ae>%n' .
87		      'GitDate: %aD%n' .
88		      'GitSubject: %s%n' .
89		      '%b%n"' .
90	    " -- \$file",
91    "find_commit_signers_cmd" =>
92	"git log --no-color " .
93	    '--format="GitCommit: %H%n' .
94		      'GitAuthor: %an <%ae>%n' .
95		      'GitDate: %aD%n' .
96		      'GitSubject: %s%n' .
97		      '%b%n"' .
98	    " -1 \$commit",
99    "find_commit_author_cmd" =>
100	"git log --no-color " .
101	    '--format="GitCommit: %H%n' .
102		      'GitAuthor: %an <%ae>%n' .
103		      'GitDate: %aD%n' .
104		      'GitSubject: %s%n"' .
105	    " -1 \$commit",
106    "blame_range_cmd" => "git blame -l -L \$diff_start,+\$diff_length \$file",
107    "blame_file_cmd" => "git blame -l \$file",
108    "commit_pattern" => "^GitCommit: ([0-9a-f]{40,40})",
109    "blame_commit_pattern" => "^([0-9a-f]+) ",
110    "author_pattern" => "^GitAuthor: (.*)",
111    "subject_pattern" => "^GitSubject: (.*)",
112);
113
114my %VCS_cmds_hg = (
115    "execute_cmd" => \&hg_execute_cmd,
116    "available" => '(which("hg") ne "") && (-d ".hg")',
117    "find_signers_cmd" =>
118	"hg log --date=\$email_hg_since " .
119	    "--template='HgCommit: {node}\\n" .
120	                "HgAuthor: {author}\\n" .
121			"HgSubject: {desc}\\n'" .
122	    " -- \$file",
123    "find_commit_signers_cmd" =>
124	"hg log " .
125	    "--template='HgSubject: {desc}\\n'" .
126	    " -r \$commit",
127    "find_commit_author_cmd" =>
128	"hg log " .
129	    "--template='HgCommit: {node}\\n" .
130		        "HgAuthor: {author}\\n" .
131			"HgSubject: {desc|firstline}\\n'" .
132	    " -r \$commit",
133    "blame_range_cmd" => "",		# not supported
134    "blame_file_cmd" => "hg blame -n \$file",
135    "commit_pattern" => "^HgCommit: ([0-9a-f]{40,40})",
136    "blame_commit_pattern" => "^([ 0-9a-f]+):",
137    "author_pattern" => "^HgAuthor: (.*)",
138    "subject_pattern" => "^HgSubject: (.*)",
139);
140
141my $conf = which_conf(".get_maintainer.conf");
142if (-f $conf) {
143    my @conf_args;
144    open(my $conffile, '<', "$conf")
145	or warn "$P: Can't find a readable .get_maintainer.conf file $!\n";
146
147    while (<$conffile>) {
148	my $line = $_;
149
150	$line =~ s/\s*\n?$//g;
151	$line =~ s/^\s*//g;
152	$line =~ s/\s+/ /g;
153
154	next if ($line =~ m/^\s*#/);
155	next if ($line =~ m/^\s*$/);
156
157	my @words = split(" ", $line);
158	foreach my $word (@words) {
159	    last if ($word =~ m/^#/);
160	    push (@conf_args, $word);
161	}
162    }
163    close($conffile);
164    unshift(@ARGV, @conf_args) if @conf_args;
165}
166
167if (!GetOptions(
168		'email!' => \$email,
169		'git!' => \$email_git,
170		'git-all-signature-types!' => \$email_git_all_signature_types,
171		'git-blame!' => \$email_git_blame,
172		'git-blame-signatures!' => \$email_git_blame_signatures,
173		'git-fallback!' => \$email_git_fallback,
174		'git-min-signatures=i' => \$email_git_min_signatures,
175		'git-max-maintainers=i' => \$email_git_max_maintainers,
176		'git-min-percent=i' => \$email_git_min_percent,
177		'git-since=s' => \$email_git_since,
178		'hg-since=s' => \$email_hg_since,
179		'i|interactive!' => \$interactive,
180		'remove-duplicates!' => \$email_remove_duplicates,
181		'mailmap!' => \$email_use_mailmap,
182		'm!' => \$email_maintainer,
183		'n!' => \$email_usename,
184		'l!' => \$email_list,
185		's!' => \$email_subscriber_list,
186		'multiline!' => \$output_multiline,
187		'roles!' => \$output_roles,
188		'rolestats!' => \$output_rolestats,
189		'separator=s' => \$output_separator,
190		'subsystem!' => \$subsystem,
191		'status!' => \$status,
192		'scm!' => \$scm,
193		'web!' => \$web,
194		'pattern-depth=i' => \$pattern_depth,
195		'k|keywords!' => \$keywords,
196		'sections!' => \$sections,
197		'fe|file-emails!' => \$file_emails,
198		'f|file' => \$from_filename,
199		'v|version' => \$version,
200		'h|help|usage' => \$help,
201		)) {
202    die "$P: invalid argument - use --help if necessary\n";
203}
204
205if ($help != 0) {
206    usage();
207    exit 0;
208}
209
210if ($version != 0) {
211    print("${P} ${V}\n");
212    exit 0;
213}
214
215if (-t STDIN && !@ARGV) {
216    # We're talking to a terminal, but have no command line arguments.
217    die "$P: missing patchfile or -f file - use --help if necessary\n";
218}
219
220$output_multiline = 0 if ($output_separator ne ", ");
221$output_rolestats = 1 if ($interactive);
222$output_roles = 1 if ($output_rolestats);
223
224if ($sections) {
225    $email = 0;
226    $email_list = 0;
227    $scm = 0;
228    $status = 0;
229    $subsystem = 0;
230    $web = 0;
231    $keywords = 0;
232    $interactive = 0;
233} else {
234    my $selections = $email + $scm + $status + $subsystem + $web;
235    if ($selections == 0) {
236	die "$P:  Missing required option: email, scm, status, subsystem or web\n";
237    }
238}
239
240if ($email &&
241    ($email_maintainer + $email_list + $email_subscriber_list +
242     $email_git + $email_git_blame) == 0) {
243    die "$P: Please select at least 1 email option\n";
244}
245
246if (!top_of_tree($lk_path)) {
247    die "$P: The current directory does not appear to be "
248	. "a QEMU source tree.\n";
249}
250
251## Read MAINTAINERS for type/value pairs
252
253my @typevalue = ();
254my %keyword_hash;
255
256open (my $maint, '<', "${lk_path}MAINTAINERS")
257    or die "$P: Can't open MAINTAINERS: $!\n";
258while (<$maint>) {
259    my $line = $_;
260
261    if ($line =~ m/^(\C):\s*(.*)/) {
262	my $type = $1;
263	my $value = $2;
264
265	##Filename pattern matching
266	if ($type eq "F" || $type eq "X") {
267	    $value =~ s@\.@\\\.@g;       ##Convert . to \.
268	    $value =~ s/\*/\.\*/g;       ##Convert * to .*
269	    $value =~ s/\?/\./g;         ##Convert ? to .
270	    ##if pattern is a directory and it lacks a trailing slash, add one
271	    if ((-d $value)) {
272		$value =~ s@([^/])$@$1/@;
273	    }
274	} elsif ($type eq "K") {
275	    $keyword_hash{@typevalue} = $value;
276	}
277	push(@typevalue, "$type:$value");
278    } elsif (!/^(\s)*$/) {
279	$line =~ s/\n$//g;
280	push(@typevalue, $line);
281    }
282}
283close($maint);
284
285
286#
287# Read mail address map
288#
289
290my $mailmap;
291
292read_mailmap();
293
294sub read_mailmap {
295    $mailmap = {
296	names => {},
297	addresses => {}
298    };
299
300    return if (!$email_use_mailmap || !(-f "${lk_path}.mailmap"));
301
302    open(my $mailmap_file, '<', "${lk_path}.mailmap")
303	or warn "$P: Can't open .mailmap: $!\n";
304
305    while (<$mailmap_file>) {
306	s/#.*$//; #strip comments
307	s/^\s+|\s+$//g; #trim
308
309	next if (/^\s*$/); #skip empty lines
310	#entries have one of the following formats:
311	# name1 <mail1>
312	# <mail1> <mail2>
313	# name1 <mail1> <mail2>
314	# name1 <mail1> name2 <mail2>
315	# (see man git-shortlog)
316
317	if (/^([^<]+)<([^>]+)>$/) {
318	    my $real_name = $1;
319	    my $address = $2;
320
321	    $real_name =~ s/\s+$//;
322	    ($real_name, $address) = parse_email("$real_name <$address>");
323	    $mailmap->{names}->{$address} = $real_name;
324
325	} elsif (/^<([^>]+)>\s*<([^>]+)>$/) {
326	    my $real_address = $1;
327	    my $wrong_address = $2;
328
329	    $mailmap->{addresses}->{$wrong_address} = $real_address;
330
331	} elsif (/^(.+)<([^>]+)>\s*<([^>]+)>$/) {
332	    my $real_name = $1;
333	    my $real_address = $2;
334	    my $wrong_address = $3;
335
336	    $real_name =~ s/\s+$//;
337	    ($real_name, $real_address) =
338		parse_email("$real_name <$real_address>");
339	    $mailmap->{names}->{$wrong_address} = $real_name;
340	    $mailmap->{addresses}->{$wrong_address} = $real_address;
341
342	} elsif (/^(.+)<([^>]+)>\s*(.+)\s*<([^>]+)>$/) {
343	    my $real_name = $1;
344	    my $real_address = $2;
345	    my $wrong_name = $3;
346	    my $wrong_address = $4;
347
348	    $real_name =~ s/\s+$//;
349	    ($real_name, $real_address) =
350		parse_email("$real_name <$real_address>");
351
352	    $wrong_name =~ s/\s+$//;
353	    ($wrong_name, $wrong_address) =
354		parse_email("$wrong_name <$wrong_address>");
355
356	    my $wrong_email = format_email($wrong_name, $wrong_address, 1);
357	    $mailmap->{names}->{$wrong_email} = $real_name;
358	    $mailmap->{addresses}->{$wrong_email} = $real_address;
359	}
360    }
361    close($mailmap_file);
362}
363
364## use the filenames on the command line or find the filenames in the patchfiles
365
366my @files = ();
367my @range = ();
368my @keyword_tvi = ();
369my @file_emails = ();
370
371if (!@ARGV) {
372    push(@ARGV, "&STDIN");
373}
374
375foreach my $file (@ARGV) {
376    if ($file ne "&STDIN") {
377	##if $file is a directory and it lacks a trailing slash, add one
378	if ((-d $file)) {
379	    $file =~ s@([^/])$@$1/@;
380	} elsif (!(-f $file)) {
381	    die "$P: file '${file}' not found\n";
382	}
383    }
384    if ($from_filename) {
385	push(@files, $file);
386	if ($file ne "MAINTAINERS" && -f $file && ($keywords || $file_emails)) {
387	    open(my $f, '<', $file)
388		or die "$P: Can't open $file: $!\n";
389	    my $text = do { local($/) ; <$f> };
390	    close($f);
391	    if ($keywords) {
392		foreach my $line (keys %keyword_hash) {
393		    if ($text =~ m/$keyword_hash{$line}/x) {
394			push(@keyword_tvi, $line);
395		    }
396		}
397	    }
398	    if ($file_emails) {
399		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;
400		push(@file_emails, clean_file_emails(@poss_addr));
401	    }
402	}
403    } else {
404	my $file_cnt = @files;
405	my $lastfile;
406
407	open(my $patch, "< $file")
408	    or die "$P: Can't open $file: $!\n";
409
410	# We can check arbitrary information before the patch
411	# like the commit message, mail headers, etc...
412	# This allows us to match arbitrary keywords against any part
413	# of a git format-patch generated file (subject tags, etc...)
414
415	my $patch_prefix = "";			#Parsing the intro
416
417	while (<$patch>) {
418	    my $patch_line = $_;
419	    if (m/^\+\+\+\s+(\S+)/) {
420		my $filename = $1;
421		$filename =~ s@^[^/]*/@@;
422		$filename =~ s@\n@@;
423		$lastfile = $filename;
424		push(@files, $filename);
425		$patch_prefix = "^[+-].*";	#Now parsing the actual patch
426	    } elsif (m/^\@\@ -(\d+),(\d+)/) {
427		if ($email_git_blame) {
428		    push(@range, "$lastfile:$1:$2");
429		}
430	    } elsif ($keywords) {
431		foreach my $line (keys %keyword_hash) {
432		    if ($patch_line =~ m/${patch_prefix}$keyword_hash{$line}/x) {
433			push(@keyword_tvi, $line);
434		    }
435		}
436	    }
437	}
438	close($patch);
439
440	if ($file_cnt == @files) {
441	    warn "$P: file '${file}' doesn't appear to be a patch.  "
442		. "Add -f to options?\n";
443	}
444	@files = sort_and_uniq(@files);
445    }
446}
447
448@file_emails = uniq(@file_emails);
449
450my %email_hash_name;
451my %email_hash_address;
452my @email_to = ();
453my %hash_list_to;
454my @list_to = ();
455my @scm = ();
456my @web = ();
457my @subsystem = ();
458my @status = ();
459my %deduplicate_name_hash = ();
460my %deduplicate_address_hash = ();
461
462my @maintainers = get_maintainers();
463
464if (@maintainers) {
465    @maintainers = merge_email(@maintainers);
466    output(@maintainers);
467}
468
469if ($scm) {
470    @scm = uniq(@scm);
471    output(@scm);
472}
473
474if ($status) {
475    @status = uniq(@status);
476    output(@status);
477}
478
479if ($subsystem) {
480    @subsystem = uniq(@subsystem);
481    output(@subsystem);
482}
483
484if ($web) {
485    @web = uniq(@web);
486    output(@web);
487}
488
489exit($exit);
490
491sub range_is_maintained {
492    my ($start, $end) = @_;
493
494    for (my $i = $start; $i < $end; $i++) {
495	my $line = $typevalue[$i];
496	if ($line =~ m/^(\C):\s*(.*)/) {
497	    my $type = $1;
498	    my $value = $2;
499	    if ($type eq 'S') {
500		if ($value =~ /(maintain|support)/i) {
501		    return 1;
502		}
503	    }
504	}
505    }
506    return 0;
507}
508
509sub range_has_maintainer {
510    my ($start, $end) = @_;
511
512    for (my $i = $start; $i < $end; $i++) {
513	my $line = $typevalue[$i];
514	if ($line =~ m/^(\C):\s*(.*)/) {
515	    my $type = $1;
516	    my $value = $2;
517	    if ($type eq 'M') {
518		return 1;
519	    }
520	}
521    }
522    return 0;
523}
524
525sub get_maintainers {
526    %email_hash_name = ();
527    %email_hash_address = ();
528    %commit_author_hash = ();
529    %commit_signer_hash = ();
530    @email_to = ();
531    %hash_list_to = ();
532    @list_to = ();
533    @scm = ();
534    @web = ();
535    @subsystem = ();
536    @status = ();
537    %deduplicate_name_hash = ();
538    %deduplicate_address_hash = ();
539    if ($email_git_all_signature_types) {
540	$signature_pattern = "(.+?)[Bb][Yy]:";
541    } else {
542	$signature_pattern = "\(" . join("|", @signature_tags) . "\)";
543    }
544
545    # Find responsible parties
546
547    my %exact_pattern_match_hash = ();
548
549    foreach my $file (@files) {
550
551	my %hash;
552	my $tvi = find_first_section();
553	while ($tvi < @typevalue) {
554	    my $start = find_starting_index($tvi);
555	    my $end = find_ending_index($tvi);
556	    my $exclude = 0;
557	    my $i;
558
559	    #Do not match excluded file patterns
560
561	    for ($i = $start; $i < $end; $i++) {
562		my $line = $typevalue[$i];
563		if ($line =~ m/^(\C):\s*(.*)/) {
564		    my $type = $1;
565		    my $value = $2;
566		    if ($type eq 'X') {
567			if (file_match_pattern($file, $value)) {
568			    $exclude = 1;
569			    last;
570			}
571		    }
572		}
573	    }
574
575	    if (!$exclude) {
576		for ($i = $start; $i < $end; $i++) {
577		    my $line = $typevalue[$i];
578		    if ($line =~ m/^(\C):\s*(.*)/) {
579			my $type = $1;
580			my $value = $2;
581			if ($type eq 'F') {
582			    if (file_match_pattern($file, $value)) {
583				my $value_pd = ($value =~ tr@/@@);
584				my $file_pd = ($file  =~ tr@/@@);
585				$value_pd++ if (substr($value,-1,1) ne "/");
586				$value_pd = -1 if ($value =~ /^\.\*/);
587				if ($value_pd >= $file_pd &&
588				    range_is_maintained($start, $end) &&
589				    range_has_maintainer($start, $end)) {
590				    $exact_pattern_match_hash{$file} = 1;
591				}
592				if ($pattern_depth == 0 ||
593				    (($file_pd - $value_pd) < $pattern_depth)) {
594				    $hash{$tvi} = $value_pd;
595				}
596			    }
597			}
598		    }
599		}
600	    }
601	    $tvi = $end + 1;
602	}
603
604	foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
605	    add_categories($line);
606	    if ($sections) {
607		my $i;
608		my $start = find_starting_index($line);
609		my $end = find_ending_index($line);
610		for ($i = $start; $i < $end; $i++) {
611		    my $line = $typevalue[$i];
612		    if ($line =~ /^[FX]:/) {		##Restore file patterns
613			$line =~ s/([^\\])\.([^\*])/$1\?$2/g;
614			$line =~ s/([^\\])\.$/$1\?/g;	##Convert . back to ?
615			$line =~ s/\\\./\./g;       	##Convert \. to .
616			$line =~ s/\.\*/\*/g;       	##Convert .* to *
617		    }
618		    $line =~ s/^([A-Z]):/$1:\t/g;
619		    print("$line\n");
620		}
621		print("\n");
622	    }
623	}
624    }
625
626    if ($keywords) {
627	@keyword_tvi = sort_and_uniq(@keyword_tvi);
628	foreach my $line (@keyword_tvi) {
629	    add_categories($line);
630	}
631    }
632
633    foreach my $email (@email_to, @list_to) {
634	$email->[0] = deduplicate_email($email->[0]);
635    }
636
637    if ($email) {
638	if (! $interactive) {
639	    $email_git_fallback = 0 if @email_to > 0 || @list_to > 0 || $email_git || $email_git_blame;
640	    if ($email_git_fallback) {
641	        print STDERR "get_maintainer.pl: No maintainers found, printing recent contributors.\n";
642	        print STDERR "get_maintainer.pl: Do not blindly cc: them on patches!  Use common sense.\n";
643	        print STDERR "\n";
644            }
645        }
646
647	foreach my $file (@files) {
648	    if ($email_git || ($email_git_fallback &&
649			       !$exact_pattern_match_hash{$file})) {
650	        vcs_file_signoffs($file);
651	    }
652	    if ($email_git_blame) {
653	        vcs_file_blame($file);
654	    }
655	}
656
657	foreach my $email (@file_emails) {
658	    my ($name, $address) = parse_email($email);
659
660	    my $tmp_email = format_email($name, $address, $email_usename);
661	    push_email_address($tmp_email, '');
662	    add_role($tmp_email, 'in file');
663	}
664    }
665
666    my @to = ();
667    if ($email || $email_list) {
668	if ($email) {
669	    @to = (@to, @email_to);
670	}
671	if ($email_list) {
672	    @to = (@to, @list_to);
673	}
674    }
675
676    if ($interactive) {
677	@to = interactive_get_maintainers(\@to);
678    }
679
680    return @to;
681}
682
683sub file_match_pattern {
684    my ($file, $pattern) = @_;
685    if (substr($pattern, -1) eq "/") {
686	if ($file =~ m@^$pattern@) {
687	    return 1;
688	}
689    } else {
690	if ($file =~ m@^$pattern@) {
691	    my $s1 = ($file =~ tr@/@@);
692	    my $s2 = ($pattern =~ tr@/@@);
693	    if ($s1 == $s2) {
694		return 1;
695	    }
696	}
697    }
698    return 0;
699}
700
701sub usage {
702    print <<EOT;
703usage: $P [options] patchfile
704       $P [options] -f file|directory
705version: $V
706
707MAINTAINER field selection options:
708  --email => print email address(es) if any
709    --git => include recent git \*-by: signers
710    --git-all-signature-types => include signers regardless of signature type
711        or use only ${signature_pattern} signers (default: $email_git_all_signature_types)
712    --git-fallback => use git when no exact MAINTAINERS pattern (default: $email_git_fallback)
713    --git-min-signatures => number of signatures required (default: $email_git_min_signatures)
714    --git-max-maintainers => maximum maintainers to add (default: $email_git_max_maintainers)
715    --git-min-percent => minimum percentage of commits required (default: $email_git_min_percent)
716    --git-blame => use git blame to find modified commits for patch or file
717    --git-since => git history to use (default: $email_git_since)
718    --hg-since => hg history to use (default: $email_hg_since)
719    --interactive => display a menu (mostly useful if used with the --git option)
720    --m => include maintainer(s) if any
721    --n => include name 'Full Name <addr\@domain.tld>'
722    --l => include list(s) if any
723    --s => include subscriber only list(s) if any
724    --remove-duplicates => minimize duplicate email names/addresses
725    --roles => show roles (status:subsystem, git-signer, list, etc...)
726    --rolestats => show roles and statistics (commits/total_commits, %)
727    --file-emails => add email addresses found in -f file (default: 0 (off))
728  --scm => print SCM tree(s) if any
729  --status => print status if any
730  --subsystem => print subsystem name if any
731  --web => print website(s) if any
732
733Output type options:
734  --separator [, ] => separator for multiple entries on 1 line
735    using --separator also sets --nomultiline if --separator is not [, ]
736  --multiline => print 1 entry per line
737
738Other options:
739  --pattern-depth => Number of pattern directory traversals (default: 0 (all))
740  --keywords => scan patch for keywords (default: $keywords)
741  --sections => print all of the subsystem sections with pattern matches
742  --mailmap => use .mailmap file (default: $email_use_mailmap)
743  --version => show version
744  --help => show this help information
745
746Default options:
747  [--email --nogit --git-fallback --m --n --l --multiline -pattern-depth=0
748   --remove-duplicates --rolestats]
749
750Notes:
751  Using "-f directory" may give unexpected results:
752      Used with "--git", git signators for _all_ files in and below
753          directory are examined as git recurses directories.
754          Any specified X: (exclude) pattern matches are _not_ ignored.
755      Used with "--nogit", directory is used as a pattern match,
756          no individual file within the directory or subdirectory
757          is matched.
758      Used with "--git-blame", does not iterate all files in directory
759  Using "--git-blame" is slow and may add old committers and authors
760      that are no longer active maintainers to the output.
761  Using "--roles" or "--rolestats" with git send-email --cc-cmd or any
762      other automated tools that expect only ["name"] <email address>
763      may not work because of additional output after <email address>.
764  Using "--rolestats" and "--git-blame" shows the #/total=% commits,
765      not the percentage of the entire file authored.  # of commits is
766      not a good measure of amount of code authored.  1 major commit may
767      contain a thousand lines, 5 trivial commits may modify a single line.
768  If git is not installed, but mercurial (hg) is installed and an .hg
769      repository exists, the following options apply to mercurial:
770          --git,
771          --git-min-signatures, --git-max-maintainers, --git-min-percent, and
772          --git-blame
773      Use --hg-since not --git-since to control date selection
774  File ".get_maintainer.conf", if it exists in the QEMU source root
775      directory, can change whatever get_maintainer defaults are desired.
776      Entries in this file can be any command line argument.
777      This file is prepended to any additional command line arguments.
778      Multiple lines and # comments are allowed.
779EOT
780}
781
782sub top_of_tree {
783    my ($lk_path) = @_;
784
785    if ($lk_path ne "" && substr($lk_path,length($lk_path)-1,1) ne "/") {
786	$lk_path .= "/";
787    }
788    if (    (-f "${lk_path}COPYING")
789        && (-f "${lk_path}MAINTAINERS")
790        && (-f "${lk_path}Makefile")
791        && (-d "${lk_path}docs")
792        && (-f "${lk_path}VERSION")
793        && (-f "${lk_path}vl.c")) {
794	return 1;
795    }
796    return 0;
797}
798
799sub parse_email {
800    my ($formatted_email) = @_;
801
802    my $name = "";
803    my $address = "";
804
805    if ($formatted_email =~ /^([^<]+)<(.+\@.*)>.*$/) {
806	$name = $1;
807	$address = $2;
808    } elsif ($formatted_email =~ /^\s*<(.+\@\S*)>.*$/) {
809	$address = $1;
810    } elsif ($formatted_email =~ /^(.+\@\S*).*$/) {
811	$address = $1;
812    }
813
814    $name =~ s/^\s+|\s+$//g;
815    $name =~ s/^\"|\"$//g;
816    $address =~ s/^\s+|\s+$//g;
817
818    if ($name =~ /[^\w \-]/i) {  	 ##has "must quote" chars
819	$name =~ s/(?<!\\)"/\\"/g;       ##escape quotes
820	$name = "\"$name\"";
821    }
822
823    return ($name, $address);
824}
825
826sub format_email {
827    my ($name, $address, $usename) = @_;
828
829    my $formatted_email;
830
831    $name =~ s/^\s+|\s+$//g;
832    $name =~ s/^\"|\"$//g;
833    $address =~ s/^\s+|\s+$//g;
834
835    if ($name =~ /[^\w \-]/i) {          ##has "must quote" chars
836	$name =~ s/(?<!\\)"/\\"/g;       ##escape quotes
837	$name = "\"$name\"";
838    }
839
840    if ($usename) {
841	if ("$name" eq "") {
842	    $formatted_email = "$address";
843	} else {
844	    $formatted_email = "$name <$address>";
845	}
846    } else {
847	$formatted_email = $address;
848    }
849
850    return $formatted_email;
851}
852
853sub find_first_section {
854    my $index = 0;
855
856    while ($index < @typevalue) {
857	my $tv = $typevalue[$index];
858	if (($tv =~ m/^(\C):\s*(.*)/)) {
859	    last;
860	}
861	$index++;
862    }
863
864    return $index;
865}
866
867sub find_starting_index {
868    my ($index) = @_;
869
870    while ($index > 0) {
871	my $tv = $typevalue[$index];
872	if (!($tv =~ m/^(\C):\s*(.*)/)) {
873	    last;
874	}
875	$index--;
876    }
877
878    return $index;
879}
880
881sub find_ending_index {
882    my ($index) = @_;
883
884    while ($index < @typevalue) {
885	my $tv = $typevalue[$index];
886	if (!($tv =~ m/^(\C):\s*(.*)/)) {
887	    last;
888	}
889	$index++;
890    }
891
892    return $index;
893}
894
895sub get_maintainer_role {
896    my ($index) = @_;
897
898    my $i;
899    my $start = find_starting_index($index);
900    my $end = find_ending_index($index);
901
902    my $role = "unknown";
903    my $subsystem = $typevalue[$start];
904    if (length($subsystem) > 20) {
905	$subsystem = substr($subsystem, 0, 17);
906	$subsystem =~ s/\s*$//;
907	$subsystem = $subsystem . "...";
908    }
909
910    for ($i = $start + 1; $i < $end; $i++) {
911	my $tv = $typevalue[$i];
912	if ($tv =~ m/^(\C):\s*(.*)/) {
913	    my $ptype = $1;
914	    my $pvalue = $2;
915	    if ($ptype eq "S") {
916		$role = $pvalue;
917	    }
918	}
919    }
920
921    $role = lc($role);
922    if      ($role eq "supported") {
923	$role = "supporter";
924    } elsif ($role eq "maintained") {
925	$role = "maintainer";
926    } elsif ($role eq "odd fixes") {
927	$role = "odd fixer";
928    } elsif ($role eq "orphan") {
929	$role = "orphan minder";
930    } elsif ($role eq "obsolete") {
931	$role = "obsolete minder";
932    } elsif ($role eq "buried alive in reporters") {
933	$role = "chief penguin";
934    }
935
936    return $role . ":" . $subsystem;
937}
938
939sub get_list_role {
940    my ($index) = @_;
941
942    my $i;
943    my $start = find_starting_index($index);
944    my $end = find_ending_index($index);
945
946    my $subsystem = $typevalue[$start];
947    if (length($subsystem) > 20) {
948	$subsystem = substr($subsystem, 0, 17);
949	$subsystem =~ s/\s*$//;
950	$subsystem = $subsystem . "...";
951    }
952
953    if ($subsystem eq "THE REST") {
954	$subsystem = "";
955    }
956
957    return $subsystem;
958}
959
960sub add_categories {
961    my ($index) = @_;
962
963    my $i;
964    my $start = find_starting_index($index);
965    my $end = find_ending_index($index);
966
967    push(@subsystem, $typevalue[$start]);
968
969    for ($i = $start + 1; $i < $end; $i++) {
970	my $tv = $typevalue[$i];
971	if ($tv =~ m/^(\C):\s*(.*)/) {
972	    my $ptype = $1;
973	    my $pvalue = $2;
974	    if ($ptype eq "L") {
975		my $list_address = $pvalue;
976		my $list_additional = "";
977		my $list_role = get_list_role($i);
978
979		if ($list_role ne "") {
980		    $list_role = ":" . $list_role;
981		}
982		if ($list_address =~ m/([^\s]+)\s+(.*)$/) {
983		    $list_address = $1;
984		    $list_additional = $2;
985		}
986		if ($list_additional =~ m/subscribers-only/) {
987		    if ($email_subscriber_list) {
988			if (!$hash_list_to{lc($list_address)}) {
989			    $hash_list_to{lc($list_address)} = 1;
990			    push(@list_to, [$list_address,
991					    "subscriber list${list_role}"]);
992			}
993		    }
994		} else {
995		    if ($email_list) {
996			if (!$hash_list_to{lc($list_address)}) {
997			    $hash_list_to{lc($list_address)} = 1;
998			    if ($list_additional =~ m/moderated/) {
999				push(@list_to, [$list_address,
1000						"moderated list${list_role}"]);
1001			    } else {
1002				push(@list_to, [$list_address,
1003						"open list${list_role}"]);
1004			    }
1005			}
1006		    }
1007		}
1008	    } elsif ($ptype eq "M") {
1009		my ($name, $address) = parse_email($pvalue);
1010		if ($name eq "") {
1011		    if ($i > 0) {
1012			my $tv = $typevalue[$i - 1];
1013			if ($tv =~ m/^(\C):\s*(.*)/) {
1014			    if ($1 eq "P") {
1015				$name = $2;
1016				$pvalue = format_email($name, $address, $email_usename);
1017			    }
1018			}
1019		    }
1020		}
1021		if ($email_maintainer) {
1022		    my $role = get_maintainer_role($i);
1023		    push_email_addresses($pvalue, $role);
1024		}
1025	    } elsif ($ptype eq "T") {
1026		push(@scm, $pvalue);
1027	    } elsif ($ptype eq "W") {
1028		push(@web, $pvalue);
1029	    } elsif ($ptype eq "S") {
1030		push(@status, $pvalue);
1031	    }
1032	}
1033    }
1034}
1035
1036sub email_inuse {
1037    my ($name, $address) = @_;
1038
1039    return 1 if (($name eq "") && ($address eq ""));
1040    return 1 if (($name ne "") && exists($email_hash_name{lc($name)}));
1041    return 1 if (($address ne "") && exists($email_hash_address{lc($address)}));
1042
1043    return 0;
1044}
1045
1046sub push_email_address {
1047    my ($line, $role) = @_;
1048
1049    my ($name, $address) = parse_email($line);
1050
1051    if ($address eq "") {
1052	return 0;
1053    }
1054
1055    if (!$email_remove_duplicates) {
1056	push(@email_to, [format_email($name, $address, $email_usename), $role]);
1057    } elsif (!email_inuse($name, $address)) {
1058	push(@email_to, [format_email($name, $address, $email_usename), $role]);
1059	$email_hash_name{lc($name)}++ if ($name ne "");
1060	$email_hash_address{lc($address)}++;
1061    }
1062
1063    return 1;
1064}
1065
1066sub push_email_addresses {
1067    my ($address, $role) = @_;
1068
1069    my @address_list = ();
1070
1071    if (rfc822_valid($address)) {
1072	push_email_address($address, $role);
1073    } elsif (@address_list = rfc822_validlist($address)) {
1074	my $array_count = shift(@address_list);
1075	while (my $entry = shift(@address_list)) {
1076	    push_email_address($entry, $role);
1077	}
1078    } else {
1079	if (!push_email_address($address, $role)) {
1080	    warn("Invalid MAINTAINERS address: '" . $address . "'\n");
1081	}
1082    }
1083}
1084
1085sub add_role {
1086    my ($line, $role) = @_;
1087
1088    my ($name, $address) = parse_email($line);
1089    my $email = format_email($name, $address, $email_usename);
1090
1091    foreach my $entry (@email_to) {
1092	if ($email_remove_duplicates) {
1093	    my ($entry_name, $entry_address) = parse_email($entry->[0]);
1094	    if (($name eq $entry_name || $address eq $entry_address)
1095		&& ($role eq "" || !($entry->[1] =~ m/$role/))
1096	    ) {
1097		if ($entry->[1] eq "") {
1098		    $entry->[1] = "$role";
1099		} else {
1100		    $entry->[1] = "$entry->[1],$role";
1101		}
1102	    }
1103	} else {
1104	    if ($email eq $entry->[0]
1105		&& ($role eq "" || !($entry->[1] =~ m/$role/))
1106	    ) {
1107		if ($entry->[1] eq "") {
1108		    $entry->[1] = "$role";
1109		} else {
1110		    $entry->[1] = "$entry->[1],$role";
1111		}
1112	    }
1113	}
1114    }
1115}
1116
1117sub which {
1118    my ($bin) = @_;
1119
1120    foreach my $path (split(/:/, $ENV{PATH})) {
1121	if (-e "$path/$bin") {
1122	    return "$path/$bin";
1123	}
1124    }
1125
1126    return "";
1127}
1128
1129sub which_conf {
1130    my ($conf) = @_;
1131
1132    foreach my $path (split(/:/, ".:$ENV{HOME}:.scripts")) {
1133	if (-e "$path/$conf") {
1134	    return "$path/$conf";
1135	}
1136    }
1137
1138    return "";
1139}
1140
1141sub mailmap_email {
1142    my ($line) = @_;
1143
1144    my ($name, $address) = parse_email($line);
1145    my $email = format_email($name, $address, 1);
1146    my $real_name = $name;
1147    my $real_address = $address;
1148
1149    if (exists $mailmap->{names}->{$email} ||
1150	exists $mailmap->{addresses}->{$email}) {
1151	if (exists $mailmap->{names}->{$email}) {
1152	    $real_name = $mailmap->{names}->{$email};
1153	}
1154	if (exists $mailmap->{addresses}->{$email}) {
1155	    $real_address = $mailmap->{addresses}->{$email};
1156	}
1157    } else {
1158	if (exists $mailmap->{names}->{$address}) {
1159	    $real_name = $mailmap->{names}->{$address};
1160	}
1161	if (exists $mailmap->{addresses}->{$address}) {
1162	    $real_address = $mailmap->{addresses}->{$address};
1163	}
1164    }
1165    return format_email($real_name, $real_address, 1);
1166}
1167
1168sub mailmap {
1169    my (@addresses) = @_;
1170
1171    my @mapped_emails = ();
1172    foreach my $line (@addresses) {
1173	push(@mapped_emails, mailmap_email($line));
1174    }
1175    merge_by_realname(@mapped_emails) if ($email_use_mailmap);
1176    return @mapped_emails;
1177}
1178
1179sub merge_by_realname {
1180    my %address_map;
1181    my (@emails) = @_;
1182
1183    foreach my $email (@emails) {
1184	my ($name, $address) = parse_email($email);
1185	if (exists $address_map{$name}) {
1186	    $address = $address_map{$name};
1187	    $email = format_email($name, $address, 1);
1188	} else {
1189	    $address_map{$name} = $address;
1190	}
1191    }
1192}
1193
1194sub git_execute_cmd {
1195    my ($cmd) = @_;
1196    my @lines = ();
1197
1198    my $output = `$cmd`;
1199    $output =~ s/^\s*//gm;
1200    @lines = split("\n", $output);
1201
1202    return @lines;
1203}
1204
1205sub hg_execute_cmd {
1206    my ($cmd) = @_;
1207    my @lines = ();
1208
1209    my $output = `$cmd`;
1210    @lines = split("\n", $output);
1211
1212    return @lines;
1213}
1214
1215sub extract_formatted_signatures {
1216    my (@signature_lines) = @_;
1217
1218    my @type = @signature_lines;
1219
1220    s/\s*(.*):.*/$1/ for (@type);
1221
1222    # cut -f2- -d":"
1223    s/\s*.*:\s*(.+)\s*/$1/ for (@signature_lines);
1224
1225## Reformat email addresses (with names) to avoid badly written signatures
1226
1227    foreach my $signer (@signature_lines) {
1228	$signer = deduplicate_email($signer);
1229    }
1230
1231    return (\@type, \@signature_lines);
1232}
1233
1234sub vcs_find_signers {
1235    my ($cmd) = @_;
1236    my $commits;
1237    my @lines = ();
1238    my @signatures = ();
1239
1240    @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
1241
1242    my $pattern = $VCS_cmds{"commit_pattern"};
1243
1244    $commits = grep(/$pattern/, @lines);	# of commits
1245
1246    @signatures = grep(/^[ \t]*${signature_pattern}.*\@.*$/, @lines);
1247
1248    return (0, @signatures) if !@signatures;
1249
1250    save_commits_by_author(@lines) if ($interactive);
1251    save_commits_by_signer(@lines) if ($interactive);
1252
1253    my ($types_ref, $signers_ref) = extract_formatted_signatures(@signatures);
1254
1255    return ($commits, @$signers_ref);
1256}
1257
1258sub vcs_find_author {
1259    my ($cmd) = @_;
1260    my @lines = ();
1261
1262    @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
1263
1264    return @lines if !@lines;
1265
1266    my @authors = ();
1267    foreach my $line (@lines) {
1268	if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
1269	    my $author = $1;
1270	    my ($name, $address) = parse_email($author);
1271	    $author = format_email($name, $address, 1);
1272	    push(@authors, $author);
1273	}
1274    }
1275
1276    save_commits_by_author(@lines) if ($interactive);
1277    save_commits_by_signer(@lines) if ($interactive);
1278
1279    return @authors;
1280}
1281
1282sub vcs_save_commits {
1283    my ($cmd) = @_;
1284    my @lines = ();
1285    my @commits = ();
1286
1287    @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
1288
1289    foreach my $line (@lines) {
1290	if ($line =~ m/$VCS_cmds{"blame_commit_pattern"}/) {
1291	    push(@commits, $1);
1292	}
1293    }
1294
1295    return @commits;
1296}
1297
1298sub vcs_blame {
1299    my ($file) = @_;
1300    my $cmd;
1301    my @commits = ();
1302
1303    return @commits if (!(-f $file));
1304
1305    if (@range && $VCS_cmds{"blame_range_cmd"} eq "") {
1306	my @all_commits = ();
1307
1308	$cmd = $VCS_cmds{"blame_file_cmd"};
1309	$cmd =~ s/(\$\w+)/$1/eeg;		#interpolate $cmd
1310	@all_commits = vcs_save_commits($cmd);
1311
1312	foreach my $file_range_diff (@range) {
1313	    next if (!($file_range_diff =~ m/(.+):(.+):(.+)/));
1314	    my $diff_file = $1;
1315	    my $diff_start = $2;
1316	    my $diff_length = $3;
1317	    next if ("$file" ne "$diff_file");
1318	    for (my $i = $diff_start; $i < $diff_start + $diff_length; $i++) {
1319		push(@commits, $all_commits[$i]);
1320	    }
1321	}
1322    } elsif (@range) {
1323	foreach my $file_range_diff (@range) {
1324	    next if (!($file_range_diff =~ m/(.+):(.+):(.+)/));
1325	    my $diff_file = $1;
1326	    my $diff_start = $2;
1327	    my $diff_length = $3;
1328	    next if ("$file" ne "$diff_file");
1329	    $cmd = $VCS_cmds{"blame_range_cmd"};
1330	    $cmd =~ s/(\$\w+)/$1/eeg;		#interpolate $cmd
1331	    push(@commits, vcs_save_commits($cmd));
1332	}
1333    } else {
1334	$cmd = $VCS_cmds{"blame_file_cmd"};
1335	$cmd =~ s/(\$\w+)/$1/eeg;		#interpolate $cmd
1336	@commits = vcs_save_commits($cmd);
1337    }
1338
1339    foreach my $commit (@commits) {
1340	$commit =~ s/^\^//g;
1341    }
1342
1343    return @commits;
1344}
1345
1346my $printed_novcs = 0;
1347sub vcs_exists {
1348    %VCS_cmds = %VCS_cmds_git;
1349    return 1 if eval $VCS_cmds{"available"};
1350    %VCS_cmds = %VCS_cmds_hg;
1351    return 2 if eval $VCS_cmds{"available"};
1352    %VCS_cmds = ();
1353    if (!$printed_novcs) {
1354	warn("$P: No supported VCS found.  Add --nogit to options?\n");
1355	warn("Using a git repository produces better results.\n");
1356	warn("Try latest git repository using:\n");
1357	warn("git clone git://git.qemu-project.org/qemu.git\n");
1358	$printed_novcs = 1;
1359    }
1360    return 0;
1361}
1362
1363sub vcs_is_git {
1364    vcs_exists();
1365    return $vcs_used == 1;
1366}
1367
1368sub vcs_is_hg {
1369    return $vcs_used == 2;
1370}
1371
1372sub interactive_get_maintainers {
1373    my ($list_ref) = @_;
1374    my @list = @$list_ref;
1375
1376    vcs_exists();
1377
1378    my %selected;
1379    my %authored;
1380    my %signed;
1381    my $count = 0;
1382    my $maintained = 0;
1383    foreach my $entry (@list) {
1384	$maintained = 1 if ($entry->[1] =~ /^(maintainer|supporter)/i);
1385	$selected{$count} = 1;
1386	$authored{$count} = 0;
1387	$signed{$count} = 0;
1388	$count++;
1389    }
1390
1391    #menu loop
1392    my $done = 0;
1393    my $print_options = 0;
1394    my $redraw = 1;
1395    while (!$done) {
1396	$count = 0;
1397	if ($redraw) {
1398	    printf STDERR "\n%1s %2s %-65s",
1399			  "*", "#", "email/list and role:stats";
1400	    if ($email_git ||
1401		($email_git_fallback && !$maintained) ||
1402		$email_git_blame) {
1403		print STDERR "auth sign";
1404	    }
1405	    print STDERR "\n";
1406	    foreach my $entry (@list) {
1407		my $email = $entry->[0];
1408		my $role = $entry->[1];
1409		my $sel = "";
1410		$sel = "*" if ($selected{$count});
1411		my $commit_author = $commit_author_hash{$email};
1412		my $commit_signer = $commit_signer_hash{$email};
1413		my $authored = 0;
1414		my $signed = 0;
1415		$authored++ for (@{$commit_author});
1416		$signed++ for (@{$commit_signer});
1417		printf STDERR "%1s %2d %-65s", $sel, $count + 1, $email;
1418		printf STDERR "%4d %4d", $authored, $signed
1419		    if ($authored > 0 || $signed > 0);
1420		printf STDERR "\n     %s\n", $role;
1421		if ($authored{$count}) {
1422		    my $commit_author = $commit_author_hash{$email};
1423		    foreach my $ref (@{$commit_author}) {
1424			print STDERR "     Author: @{$ref}[1]\n";
1425		    }
1426		}
1427		if ($signed{$count}) {
1428		    my $commit_signer = $commit_signer_hash{$email};
1429		    foreach my $ref (@{$commit_signer}) {
1430			print STDERR "     @{$ref}[2]: @{$ref}[1]\n";
1431		    }
1432		}
1433
1434		$count++;
1435	    }
1436	}
1437	my $date_ref = \$email_git_since;
1438	$date_ref = \$email_hg_since if (vcs_is_hg());
1439	if ($print_options) {
1440	    $print_options = 0;
1441	    if (vcs_exists()) {
1442		print STDERR <<EOT
1443
1444Version Control options:
1445g  use git history      [$email_git]
1446gf use git-fallback     [$email_git_fallback]
1447b  use git blame        [$email_git_blame]
1448bs use blame signatures [$email_git_blame_signatures]
1449c# minimum commits      [$email_git_min_signatures]
1450%# min percent          [$email_git_min_percent]
1451d# history to use       [$$date_ref]
1452x# max maintainers      [$email_git_max_maintainers]
1453t  all signature types  [$email_git_all_signature_types]
1454m  use .mailmap         [$email_use_mailmap]
1455EOT
1456	    }
1457	    print STDERR <<EOT
1458
1459Additional options:
14600  toggle all
1461tm toggle maintainers
1462tg toggle git entries
1463tl toggle open list entries
1464ts toggle subscriber list entries
1465f  emails in file       [$file_emails]
1466k  keywords in file     [$keywords]
1467r  remove duplicates    [$email_remove_duplicates]
1468p# pattern match depth  [$pattern_depth]
1469EOT
1470	}
1471	print STDERR
1472"\n#(toggle), A#(author), S#(signed) *(all), ^(none), O(options), Y(approve): ";
1473
1474	my $input = <STDIN>;
1475	chomp($input);
1476
1477	$redraw = 1;
1478	my $rerun = 0;
1479	my @wish = split(/[, ]+/, $input);
1480	foreach my $nr (@wish) {
1481	    $nr = lc($nr);
1482	    my $sel = substr($nr, 0, 1);
1483	    my $str = substr($nr, 1);
1484	    my $val = 0;
1485	    $val = $1 if $str =~ /^(\d+)$/;
1486
1487	    if ($sel eq "y") {
1488		$interactive = 0;
1489		$done = 1;
1490		$output_rolestats = 0;
1491		$output_roles = 0;
1492		last;
1493	    } elsif ($nr =~ /^\d+$/ && $nr > 0 && $nr <= $count) {
1494		$selected{$nr - 1} = !$selected{$nr - 1};
1495	    } elsif ($sel eq "*" || $sel eq '^') {
1496		my $toggle = 0;
1497		$toggle = 1 if ($sel eq '*');
1498		for (my $i = 0; $i < $count; $i++) {
1499		    $selected{$i} = $toggle;
1500		}
1501	    } elsif ($sel eq "0") {
1502		for (my $i = 0; $i < $count; $i++) {
1503		    $selected{$i} = !$selected{$i};
1504		}
1505	    } elsif ($sel eq "t") {
1506		if (lc($str) eq "m") {
1507		    for (my $i = 0; $i < $count; $i++) {
1508			$selected{$i} = !$selected{$i}
1509			    if ($list[$i]->[1] =~ /^(maintainer|supporter)/i);
1510		    }
1511		} elsif (lc($str) eq "g") {
1512		    for (my $i = 0; $i < $count; $i++) {
1513			$selected{$i} = !$selected{$i}
1514			    if ($list[$i]->[1] =~ /^(author|commit|signer)/i);
1515		    }
1516		} elsif (lc($str) eq "l") {
1517		    for (my $i = 0; $i < $count; $i++) {
1518			$selected{$i} = !$selected{$i}
1519			    if ($list[$i]->[1] =~ /^(open list)/i);
1520		    }
1521		} elsif (lc($str) eq "s") {
1522		    for (my $i = 0; $i < $count; $i++) {
1523			$selected{$i} = !$selected{$i}
1524			    if ($list[$i]->[1] =~ /^(subscriber list)/i);
1525		    }
1526		}
1527	    } elsif ($sel eq "a") {
1528		if ($val > 0 && $val <= $count) {
1529		    $authored{$val - 1} = !$authored{$val - 1};
1530		} elsif ($str eq '*' || $str eq '^') {
1531		    my $toggle = 0;
1532		    $toggle = 1 if ($str eq '*');
1533		    for (my $i = 0; $i < $count; $i++) {
1534			$authored{$i} = $toggle;
1535		    }
1536		}
1537	    } elsif ($sel eq "s") {
1538		if ($val > 0 && $val <= $count) {
1539		    $signed{$val - 1} = !$signed{$val - 1};
1540		} elsif ($str eq '*' || $str eq '^') {
1541		    my $toggle = 0;
1542		    $toggle = 1 if ($str eq '*');
1543		    for (my $i = 0; $i < $count; $i++) {
1544			$signed{$i} = $toggle;
1545		    }
1546		}
1547	    } elsif ($sel eq "o") {
1548		$print_options = 1;
1549		$redraw = 1;
1550	    } elsif ($sel eq "g") {
1551		if ($str eq "f") {
1552		    bool_invert(\$email_git_fallback);
1553		} else {
1554		    bool_invert(\$email_git);
1555		}
1556		$rerun = 1;
1557	    } elsif ($sel eq "b") {
1558		if ($str eq "s") {
1559		    bool_invert(\$email_git_blame_signatures);
1560		} else {
1561		    bool_invert(\$email_git_blame);
1562		}
1563		$rerun = 1;
1564	    } elsif ($sel eq "c") {
1565		if ($val > 0) {
1566		    $email_git_min_signatures = $val;
1567		    $rerun = 1;
1568		}
1569	    } elsif ($sel eq "x") {
1570		if ($val > 0) {
1571		    $email_git_max_maintainers = $val;
1572		    $rerun = 1;
1573		}
1574	    } elsif ($sel eq "%") {
1575		if ($str ne "" && $val >= 0) {
1576		    $email_git_min_percent = $val;
1577		    $rerun = 1;
1578		}
1579	    } elsif ($sel eq "d") {
1580		if (vcs_is_git()) {
1581		    $email_git_since = $str;
1582		} elsif (vcs_is_hg()) {
1583		    $email_hg_since = $str;
1584		}
1585		$rerun = 1;
1586	    } elsif ($sel eq "t") {
1587		bool_invert(\$email_git_all_signature_types);
1588		$rerun = 1;
1589	    } elsif ($sel eq "f") {
1590		bool_invert(\$file_emails);
1591		$rerun = 1;
1592	    } elsif ($sel eq "r") {
1593		bool_invert(\$email_remove_duplicates);
1594		$rerun = 1;
1595	    } elsif ($sel eq "m") {
1596		bool_invert(\$email_use_mailmap);
1597		read_mailmap();
1598		$rerun = 1;
1599	    } elsif ($sel eq "k") {
1600		bool_invert(\$keywords);
1601		$rerun = 1;
1602	    } elsif ($sel eq "p") {
1603		if ($str ne "" && $val >= 0) {
1604		    $pattern_depth = $val;
1605		    $rerun = 1;
1606		}
1607	    } elsif ($sel eq "h" || $sel eq "?") {
1608		print STDERR <<EOT
1609
1610Interactive mode allows you to select the various maintainers, submitters,
1611commit signers and mailing lists that could be CC'd on a patch.
1612
1613Any *'d entry is selected.
1614
1615If you have git or hg installed, you can choose to summarize the commit
1616history of files in the patch.  Also, each line of the current file can
1617be matched to its commit author and that commits signers with blame.
1618
1619Various knobs exist to control the length of time for active commit
1620tracking, the maximum number of commit authors and signers to add,
1621and such.
1622
1623Enter selections at the prompt until you are satisfied that the selected
1624maintainers are appropriate.  You may enter multiple selections separated
1625by either commas or spaces.
1626
1627EOT
1628	    } else {
1629		print STDERR "invalid option: '$nr'\n";
1630		$redraw = 0;
1631	    }
1632	}
1633	if ($rerun) {
1634	    print STDERR "git-blame can be very slow, please have patience..."
1635		if ($email_git_blame);
1636	    goto &get_maintainers;
1637	}
1638    }
1639
1640    #drop not selected entries
1641    $count = 0;
1642    my @new_emailto = ();
1643    foreach my $entry (@list) {
1644	if ($selected{$count}) {
1645	    push(@new_emailto, $list[$count]);
1646	}
1647	$count++;
1648    }
1649    return @new_emailto;
1650}
1651
1652sub bool_invert {
1653    my ($bool_ref) = @_;
1654
1655    if ($$bool_ref) {
1656	$$bool_ref = 0;
1657    } else {
1658	$$bool_ref = 1;
1659    }
1660}
1661
1662sub deduplicate_email {
1663    my ($email) = @_;
1664
1665    my $matched = 0;
1666    my ($name, $address) = parse_email($email);
1667    $email = format_email($name, $address, 1);
1668    $email = mailmap_email($email);
1669
1670    return $email if (!$email_remove_duplicates);
1671
1672    ($name, $address) = parse_email($email);
1673
1674    if ($name ne "" && $deduplicate_name_hash{lc($name)}) {
1675	$name = $deduplicate_name_hash{lc($name)}->[0];
1676	$address = $deduplicate_name_hash{lc($name)}->[1];
1677	$matched = 1;
1678    } elsif ($deduplicate_address_hash{lc($address)}) {
1679	$name = $deduplicate_address_hash{lc($address)}->[0];
1680	$address = $deduplicate_address_hash{lc($address)}->[1];
1681	$matched = 1;
1682    }
1683    if (!$matched) {
1684	$deduplicate_name_hash{lc($name)} = [ $name, $address ];
1685	$deduplicate_address_hash{lc($address)} = [ $name, $address ];
1686    }
1687    $email = format_email($name, $address, 1);
1688    $email = mailmap_email($email);
1689    return $email;
1690}
1691
1692sub save_commits_by_author {
1693    my (@lines) = @_;
1694
1695    my @authors = ();
1696    my @commits = ();
1697    my @subjects = ();
1698
1699    foreach my $line (@lines) {
1700	if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
1701	    my $author = $1;
1702	    $author = deduplicate_email($author);
1703	    push(@authors, $author);
1704	}
1705	push(@commits, $1) if ($line =~ m/$VCS_cmds{"commit_pattern"}/);
1706	push(@subjects, $1) if ($line =~ m/$VCS_cmds{"subject_pattern"}/);
1707    }
1708
1709    for (my $i = 0; $i < @authors; $i++) {
1710	my $exists = 0;
1711	foreach my $ref(@{$commit_author_hash{$authors[$i]}}) {
1712	    if (@{$ref}[0] eq $commits[$i] &&
1713		@{$ref}[1] eq $subjects[$i]) {
1714		$exists = 1;
1715		last;
1716	    }
1717	}
1718	if (!$exists) {
1719	    push(@{$commit_author_hash{$authors[$i]}},
1720		 [ ($commits[$i], $subjects[$i]) ]);
1721	}
1722    }
1723}
1724
1725sub save_commits_by_signer {
1726    my (@lines) = @_;
1727
1728    my $commit = "";
1729    my $subject = "";
1730
1731    foreach my $line (@lines) {
1732	$commit = $1 if ($line =~ m/$VCS_cmds{"commit_pattern"}/);
1733	$subject = $1 if ($line =~ m/$VCS_cmds{"subject_pattern"}/);
1734	if ($line =~ /^[ \t]*${signature_pattern}.*\@.*$/) {
1735	    my @signatures = ($line);
1736	    my ($types_ref, $signers_ref) = extract_formatted_signatures(@signatures);
1737	    my @types = @$types_ref;
1738	    my @signers = @$signers_ref;
1739
1740	    my $type = $types[0];
1741	    my $signer = $signers[0];
1742
1743	    $signer = deduplicate_email($signer);
1744
1745	    my $exists = 0;
1746	    foreach my $ref(@{$commit_signer_hash{$signer}}) {
1747		if (@{$ref}[0] eq $commit &&
1748		    @{$ref}[1] eq $subject &&
1749		    @{$ref}[2] eq $type) {
1750		    $exists = 1;
1751		    last;
1752		}
1753	    }
1754	    if (!$exists) {
1755		push(@{$commit_signer_hash{$signer}},
1756		     [ ($commit, $subject, $type) ]);
1757	    }
1758	}
1759    }
1760}
1761
1762sub vcs_assign {
1763    my ($role, $divisor, @lines) = @_;
1764
1765    my %hash;
1766    my $count = 0;
1767
1768    return if (@lines <= 0);
1769
1770    if ($divisor <= 0) {
1771	warn("Bad divisor in " . (caller(0))[3] . ": $divisor\n");
1772	$divisor = 1;
1773    }
1774
1775    @lines = mailmap(@lines);
1776
1777    return if (@lines <= 0);
1778
1779    @lines = sort(@lines);
1780
1781    # uniq -c
1782    $hash{$_}++ for @lines;
1783
1784    # sort -rn
1785    foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
1786	my $sign_offs = $hash{$line};
1787	my $percent = $sign_offs * 100 / $divisor;
1788
1789	$percent = 100 if ($percent > 100);
1790	$count++;
1791	last if ($sign_offs < $email_git_min_signatures ||
1792		 $count > $email_git_max_maintainers ||
1793		 $percent < $email_git_min_percent);
1794	push_email_address($line, '');
1795	if ($output_rolestats) {
1796	    my $fmt_percent = sprintf("%.0f", $percent);
1797	    add_role($line, "$role:$sign_offs/$divisor=$fmt_percent%");
1798	} else {
1799	    add_role($line, $role);
1800	}
1801    }
1802}
1803
1804sub vcs_file_signoffs {
1805    my ($file) = @_;
1806
1807    my @signers = ();
1808    my $commits;
1809
1810    $vcs_used = vcs_exists();
1811    return if (!$vcs_used);
1812
1813    my $cmd = $VCS_cmds{"find_signers_cmd"};
1814    $cmd =~ s/(\$\w+)/$1/eeg;		# interpolate $cmd
1815
1816    ($commits, @signers) = vcs_find_signers($cmd);
1817
1818    foreach my $signer (@signers) {
1819	$signer = deduplicate_email($signer);
1820    }
1821
1822    vcs_assign("commit_signer", $commits, @signers);
1823}
1824
1825sub vcs_file_blame {
1826    my ($file) = @_;
1827
1828    my @signers = ();
1829    my @all_commits = ();
1830    my @commits = ();
1831    my $total_commits;
1832    my $total_lines;
1833
1834    $vcs_used = vcs_exists();
1835    return if (!$vcs_used);
1836
1837    @all_commits = vcs_blame($file);
1838    @commits = uniq(@all_commits);
1839    $total_commits = @commits;
1840    $total_lines = @all_commits;
1841
1842    if ($email_git_blame_signatures) {
1843	if (vcs_is_hg()) {
1844	    my $commit_count;
1845	    my @commit_signers = ();
1846	    my $commit = join(" -r ", @commits);
1847	    my $cmd;
1848
1849	    $cmd = $VCS_cmds{"find_commit_signers_cmd"};
1850	    $cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
1851
1852	    ($commit_count, @commit_signers) = vcs_find_signers($cmd);
1853
1854	    push(@signers, @commit_signers);
1855	} else {
1856	    foreach my $commit (@commits) {
1857		my $commit_count;
1858		my @commit_signers = ();
1859		my $cmd;
1860
1861		$cmd = $VCS_cmds{"find_commit_signers_cmd"};
1862		$cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
1863
1864		($commit_count, @commit_signers) = vcs_find_signers($cmd);
1865
1866		push(@signers, @commit_signers);
1867	    }
1868	}
1869    }
1870
1871    if ($from_filename) {
1872	if ($output_rolestats) {
1873	    my @blame_signers;
1874	    if (vcs_is_hg()) {{		# Double brace for last exit
1875		my $commit_count;
1876		my @commit_signers = ();
1877		@commits = uniq(@commits);
1878		@commits = sort(@commits);
1879		my $commit = join(" -r ", @commits);
1880		my $cmd;
1881
1882		$cmd = $VCS_cmds{"find_commit_author_cmd"};
1883		$cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
1884
1885		my @lines = ();
1886
1887		@lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
1888
1889		last if !@lines;
1890
1891		my @authors = ();
1892		foreach my $line (@lines) {
1893		    if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
1894			my $author = $1;
1895			$author = deduplicate_email($author);
1896			push(@authors, $author);
1897		    }
1898		}
1899
1900		save_commits_by_author(@lines) if ($interactive);
1901		save_commits_by_signer(@lines) if ($interactive);
1902
1903		push(@signers, @authors);
1904	    }}
1905	    else {
1906		foreach my $commit (@commits) {
1907		    my $i;
1908		    my $cmd = $VCS_cmds{"find_commit_author_cmd"};
1909		    $cmd =~ s/(\$\w+)/$1/eeg;	#interpolate $cmd
1910		    my @author = vcs_find_author($cmd);
1911		    next if !@author;
1912
1913		    my $formatted_author = deduplicate_email($author[0]);
1914
1915		    my $count = grep(/$commit/, @all_commits);
1916		    for ($i = 0; $i < $count ; $i++) {
1917			push(@blame_signers, $formatted_author);
1918		    }
1919		}
1920	    }
1921	    if (@blame_signers) {
1922		vcs_assign("authored lines", $total_lines, @blame_signers);
1923	    }
1924	}
1925	foreach my $signer (@signers) {
1926	    $signer = deduplicate_email($signer);
1927	}
1928	vcs_assign("commits", $total_commits, @signers);
1929    } else {
1930	foreach my $signer (@signers) {
1931	    $signer = deduplicate_email($signer);
1932	}
1933	vcs_assign("modified commits", $total_commits, @signers);
1934    }
1935}
1936
1937sub uniq {
1938    my (@parms) = @_;
1939
1940    my %saw;
1941    @parms = grep(!$saw{$_}++, @parms);
1942    return @parms;
1943}
1944
1945sub sort_and_uniq {
1946    my (@parms) = @_;
1947
1948    my %saw;
1949    @parms = sort @parms;
1950    @parms = grep(!$saw{$_}++, @parms);
1951    return @parms;
1952}
1953
1954sub clean_file_emails {
1955    my (@file_emails) = @_;
1956    my @fmt_emails = ();
1957
1958    foreach my $email (@file_emails) {
1959	$email =~ s/[\(\<\{]{0,1}([A-Za-z0-9_\.\+-]+\@[A-Za-z0-9\.-]+)[\)\>\}]{0,1}/\<$1\>/g;
1960	my ($name, $address) = parse_email($email);
1961	if ($name eq '"[,\.]"') {
1962	    $name = "";
1963	}
1964
1965	my @nw = split(/[^A-Za-zÀ-ÿ\'\,\.\+-]/, $name);
1966	if (@nw > 2) {
1967	    my $first = $nw[@nw - 3];
1968	    my $middle = $nw[@nw - 2];
1969	    my $last = $nw[@nw - 1];
1970
1971	    if (((length($first) == 1 && $first =~ m/[A-Za-z]/) ||
1972		 (length($first) == 2 && substr($first, -1) eq ".")) ||
1973		(length($middle) == 1 ||
1974		 (length($middle) == 2 && substr($middle, -1) eq "."))) {
1975		$name = "$first $middle $last";
1976	    } else {
1977		$name = "$middle $last";
1978	    }
1979	}
1980
1981	if (substr($name, -1) =~ /[,\.]/) {
1982	    $name = substr($name, 0, length($name) - 1);
1983	} elsif (substr($name, -2) =~ /[,\.]"/) {
1984	    $name = substr($name, 0, length($name) - 2) . '"';
1985	}
1986
1987	if (substr($name, 0, 1) =~ /[,\.]/) {
1988	    $name = substr($name, 1, length($name) - 1);
1989	} elsif (substr($name, 0, 2) =~ /"[,\.]/) {
1990	    $name = '"' . substr($name, 2, length($name) - 2);
1991	}
1992
1993	my $fmt_email = format_email($name, $address, $email_usename);
1994	push(@fmt_emails, $fmt_email);
1995    }
1996    return @fmt_emails;
1997}
1998
1999sub merge_email {
2000    my @lines;
2001    my %saw;
2002
2003    for (@_) {
2004	my ($address, $role) = @$_;
2005	if (!$saw{$address}) {
2006	    if ($output_roles) {
2007		push(@lines, "$address ($role)");
2008	    } else {
2009		push(@lines, $address);
2010	    }
2011	    $saw{$address} = 1;
2012	}
2013    }
2014
2015    return @lines;
2016}
2017
2018sub output {
2019    my (@parms) = @_;
2020
2021    if ($output_multiline) {
2022	foreach my $line (@parms) {
2023	    print("${line}\n");
2024	}
2025    } else {
2026	print(join($output_separator, @parms));
2027	print("\n");
2028    }
2029}
2030
2031my $rfc822re;
2032
2033sub make_rfc822re {
2034#   Basic lexical tokens are specials, domain_literal, quoted_string, atom, and
2035#   comment.  We must allow for rfc822_lwsp (or comments) after each of these.
2036#   This regexp will only work on addresses which have had comments stripped
2037#   and replaced with rfc822_lwsp.
2038
2039    my $specials = '()<>@,;:\\\\".\\[\\]';
2040    my $controls = '\\000-\\037\\177';
2041
2042    my $dtext = "[^\\[\\]\\r\\\\]";
2043    my $domain_literal = "\\[(?:$dtext|\\\\.)*\\]$rfc822_lwsp*";
2044
2045    my $quoted_string = "\"(?:[^\\\"\\r\\\\]|\\\\.|$rfc822_lwsp)*\"$rfc822_lwsp*";
2046
2047#   Use zero-width assertion to spot the limit of an atom.  A simple
2048#   $rfc822_lwsp* causes the regexp engine to hang occasionally.
2049    my $atom = "[^$specials $controls]+(?:$rfc822_lwsp+|\\Z|(?=[\\[\"$specials]))";
2050    my $word = "(?:$atom|$quoted_string)";
2051    my $localpart = "$word(?:\\.$rfc822_lwsp*$word)*";
2052
2053    my $sub_domain = "(?:$atom|$domain_literal)";
2054    my $domain = "$sub_domain(?:\\.$rfc822_lwsp*$sub_domain)*";
2055
2056    my $addr_spec = "$localpart\@$rfc822_lwsp*$domain";
2057
2058    my $phrase = "$word*";
2059    my $route = "(?:\@$domain(?:,\@$rfc822_lwsp*$domain)*:$rfc822_lwsp*)";
2060    my $route_addr = "\\<$rfc822_lwsp*$route?$addr_spec\\>$rfc822_lwsp*";
2061    my $mailbox = "(?:$addr_spec|$phrase$route_addr)";
2062
2063    my $group = "$phrase:$rfc822_lwsp*(?:$mailbox(?:,\\s*$mailbox)*)?;\\s*";
2064    my $address = "(?:$mailbox|$group)";
2065
2066    return "$rfc822_lwsp*$address";
2067}
2068
2069sub rfc822_strip_comments {
2070    my $s = shift;
2071#   Recursively remove comments, and replace with a single space.  The simpler
2072#   regexps in the Email Addressing FAQ are imperfect - they will miss escaped
2073#   chars in atoms, for example.
2074
2075    while ($s =~ s/^((?:[^"\\]|\\.)*
2076                    (?:"(?:[^"\\]|\\.)*"(?:[^"\\]|\\.)*)*)
2077                    \((?:[^()\\]|\\.)*\)/$1 /osx) {}
2078    return $s;
2079}
2080
2081#   valid: returns true if the parameter is an RFC822 valid address
2082#
2083sub rfc822_valid {
2084    my $s = rfc822_strip_comments(shift);
2085
2086    if (!$rfc822re) {
2087        $rfc822re = make_rfc822re();
2088    }
2089
2090    return $s =~ m/^$rfc822re$/so && $s =~ m/^$rfc822_char*$/;
2091}
2092
2093#   validlist: In scalar context, returns true if the parameter is an RFC822
2094#              valid list of addresses.
2095#
2096#              In list context, returns an empty list on failure (an invalid
2097#              address was found); otherwise a list whose first element is the
2098#              number of addresses found and whose remaining elements are the
2099#              addresses.  This is needed to disambiguate failure (invalid)
2100#              from success with no addresses found, because an empty string is
2101#              a valid list.
2102
2103sub rfc822_validlist {
2104    my $s = rfc822_strip_comments(shift);
2105
2106    if (!$rfc822re) {
2107        $rfc822re = make_rfc822re();
2108    }
2109    # * null list items are valid according to the RFC
2110    # * the '1' business is to aid in distinguishing failure from no results
2111
2112    my @r;
2113    if ($s =~ m/^(?:$rfc822re)?(?:,(?:$rfc822re)?)*$/so &&
2114	$s =~ m/^$rfc822_char*$/) {
2115        while ($s =~ m/(?:^|,$rfc822_lwsp*)($rfc822re)/gos) {
2116            push(@r, $1);
2117        }
2118        return wantarray ? (scalar(@r), @r) : 1;
2119    }
2120    return wantarray ? () : 0;
2121}
2122