1#!/usr/bin/env perl
2# SPDX-License-Identifier: GPL-2.0
3#
4# (c) 2007, Joe Perches <joe@perches.com>
5#           created from checkpatch.pl
6#
7# Print selected MAINTAINERS information for
8# the files modified in a patch or for a file
9#
10# usage: perl scripts/get_maintainer.pl [OPTIONS] <patch>
11#        perl scripts/get_maintainer.pl [OPTIONS] -f <file>
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;
22use File::Spec::Functions;
23use open qw(:std :encoding(UTF-8));
24
25my $cur_path = fastgetcwd() . '/';
26my $lk_path = "./";
27my $email = 1;
28my $email_usename = 1;
29my $email_maintainer = 1;
30my $email_reviewer = 1;
31my $email_fixes = 1;
32my $email_list = 1;
33my $email_moderated_list = 1;
34my $email_subscriber_list = 0;
35my $email_git_penguin_chiefs = 0;
36my $email_git = 0;
37my $email_git_all_signature_types = 0;
38my $email_git_blame = 0;
39my $email_git_blame_signatures = 1;
40my $email_git_fallback = 1;
41my $email_git_min_signatures = 1;
42my $email_git_max_maintainers = 5;
43my $email_git_min_percent = 5;
44my $email_git_since = "1-year-ago";
45my $email_hg_since = "-365";
46my $interactive = 0;
47my $email_remove_duplicates = 1;
48my $email_use_mailmap = 1;
49my $output_multiline = 1;
50my $output_separator = ", ";
51my $output_roles = 0;
52my $output_rolestats = 1;
53my $output_section_maxlen = 50;
54my $scm = 0;
55my $tree = 1;
56my $web = 0;
57my $subsystem = 0;
58my $status = 0;
59my $letters = "";
60my $keywords = 1;
61my $keywords_in_file = 0;
62my $sections = 0;
63my $email_file_emails = 0;
64my $from_filename = 0;
65my $pattern_depth = 0;
66my $self_test = undef;
67my $version = 0;
68my $help = 0;
69my $find_maintainer_files = 0;
70my $maintainer_path;
71my $vcs_used = 0;
72
73my $exit = 0;
74
75my @files = ();
76my @fixes = ();			# If a patch description includes Fixes: lines
77my @range = ();
78my @keyword_tvi = ();
79my @file_emails = ();
80
81my %commit_author_hash;
82my %commit_signer_hash;
83
84my @penguin_chief = ();
85push(@penguin_chief, "Linus Torvalds:torvalds\@linux-foundation.org");
86#Andrew wants in on most everything - 2009/01/14
87#push(@penguin_chief, "Andrew Morton:akpm\@linux-foundation.org");
88
89my @penguin_chief_names = ();
90foreach my $chief (@penguin_chief) {
91    if ($chief =~ m/^(.*):(.*)/) {
92	my $chief_name = $1;
93	my $chief_addr = $2;
94	push(@penguin_chief_names, $chief_name);
95    }
96}
97my $penguin_chiefs = "\(" . join("|", @penguin_chief_names) . "\)";
98
99# Signature types of people who are either
100# 	a) responsible for the code in question, or
101# 	b) familiar enough with it to give relevant feedback
102my @signature_tags = ();
103push(@signature_tags, "Signed-off-by:");
104push(@signature_tags, "Reviewed-by:");
105push(@signature_tags, "Acked-by:");
106
107my $signature_pattern = "\(" . join("|", @signature_tags) . "\)";
108
109# rfc822 email address - preloaded methods go here.
110my $rfc822_lwsp = "(?:(?:\\r\\n)?[ \\t])";
111my $rfc822_char = '[\\000-\\377]';
112
113# VCS command support: class-like functions and strings
114
115my %VCS_cmds;
116
117my %VCS_cmds_git = (
118    "execute_cmd" => \&git_execute_cmd,
119    "available" => '(which("git") ne "") && (-e ".git")',
120    "find_signers_cmd" =>
121	"git log --no-color --follow --since=\$email_git_since " .
122	    '--numstat --no-merges ' .
123	    '--format="GitCommit: %H%n' .
124		      'GitAuthor: %an <%ae>%n' .
125		      'GitDate: %aD%n' .
126		      'GitSubject: %s%n' .
127		      '%b%n"' .
128	    " -- \$file",
129    "find_commit_signers_cmd" =>
130	"git log --no-color " .
131	    '--numstat ' .
132	    '--format="GitCommit: %H%n' .
133		      'GitAuthor: %an <%ae>%n' .
134		      'GitDate: %aD%n' .
135		      'GitSubject: %s%n' .
136		      '%b%n"' .
137	    " -1 \$commit",
138    "find_commit_author_cmd" =>
139	"git log --no-color " .
140	    '--numstat ' .
141	    '--format="GitCommit: %H%n' .
142		      'GitAuthor: %an <%ae>%n' .
143		      'GitDate: %aD%n' .
144		      'GitSubject: %s%n"' .
145	    " -1 \$commit",
146    "blame_range_cmd" => "git blame -l -L \$diff_start,+\$diff_length \$file",
147    "blame_file_cmd" => "git blame -l \$file",
148    "commit_pattern" => "^GitCommit: ([0-9a-f]{40,40})",
149    "blame_commit_pattern" => "^([0-9a-f]+) ",
150    "author_pattern" => "^GitAuthor: (.*)",
151    "subject_pattern" => "^GitSubject: (.*)",
152    "stat_pattern" => "^(\\d+)\\t(\\d+)\\t\$file\$",
153    "file_exists_cmd" => "git ls-files \$file",
154    "list_files_cmd" => "git ls-files \$file",
155);
156
157my %VCS_cmds_hg = (
158    "execute_cmd" => \&hg_execute_cmd,
159    "available" => '(which("hg") ne "") && (-d ".hg")',
160    "find_signers_cmd" =>
161	"hg log --date=\$email_hg_since " .
162	    "--template='HgCommit: {node}\\n" .
163	                "HgAuthor: {author}\\n" .
164			"HgSubject: {desc}\\n'" .
165	    " -- \$file",
166    "find_commit_signers_cmd" =>
167	"hg log " .
168	    "--template='HgSubject: {desc}\\n'" .
169	    " -r \$commit",
170    "find_commit_author_cmd" =>
171	"hg log " .
172	    "--template='HgCommit: {node}\\n" .
173		        "HgAuthor: {author}\\n" .
174			"HgSubject: {desc|firstline}\\n'" .
175	    " -r \$commit",
176    "blame_range_cmd" => "",		# not supported
177    "blame_file_cmd" => "hg blame -n \$file",
178    "commit_pattern" => "^HgCommit: ([0-9a-f]{40,40})",
179    "blame_commit_pattern" => "^([ 0-9a-f]+):",
180    "author_pattern" => "^HgAuthor: (.*)",
181    "subject_pattern" => "^HgSubject: (.*)",
182    "stat_pattern" => "^(\\d+)\t(\\d+)\t\$file\$",
183    "file_exists_cmd" => "hg files \$file",
184    "list_files_cmd" => "hg manifest -R \$file",
185);
186
187my $conf = which_conf(".get_maintainer.conf");
188if (-f $conf) {
189    my @conf_args;
190    open(my $conffile, '<', "$conf")
191	or warn "$P: Can't find a readable .get_maintainer.conf file $!\n";
192
193    while (<$conffile>) {
194	my $line = $_;
195
196	$line =~ s/\s*\n?$//g;
197	$line =~ s/^\s*//g;
198	$line =~ s/\s+/ /g;
199
200	next if ($line =~ m/^\s*#/);
201	next if ($line =~ m/^\s*$/);
202
203	my @words = split(" ", $line);
204	foreach my $word (@words) {
205	    last if ($word =~ m/^#/);
206	    push (@conf_args, $word);
207	}
208    }
209    close($conffile);
210    unshift(@ARGV, @conf_args) if @conf_args;
211}
212
213my @ignore_emails = ();
214my $ignore_file = which_conf(".get_maintainer.ignore");
215if (-f $ignore_file) {
216    open(my $ignore, '<', "$ignore_file")
217	or warn "$P: Can't find a readable .get_maintainer.ignore file $!\n";
218    while (<$ignore>) {
219	my $line = $_;
220
221	$line =~ s/\s*\n?$//;
222	$line =~ s/^\s*//;
223	$line =~ s/\s+$//;
224	$line =~ s/#.*$//;
225
226	next if ($line =~ m/^\s*$/);
227	if (rfc822_valid($line)) {
228	    push(@ignore_emails, $line);
229	}
230    }
231    close($ignore);
232}
233
234if ($#ARGV > 0) {
235    foreach (@ARGV) {
236        if ($_ =~ /^-{1,2}self-test(?:=|$)/) {
237            die "$P: using --self-test does not allow any other option or argument\n";
238        }
239    }
240}
241
242if (!GetOptions(
243		'email!' => \$email,
244		'git!' => \$email_git,
245		'git-all-signature-types!' => \$email_git_all_signature_types,
246		'git-blame!' => \$email_git_blame,
247		'git-blame-signatures!' => \$email_git_blame_signatures,
248		'git-fallback!' => \$email_git_fallback,
249		'git-chief-penguins!' => \$email_git_penguin_chiefs,
250		'git-min-signatures=i' => \$email_git_min_signatures,
251		'git-max-maintainers=i' => \$email_git_max_maintainers,
252		'git-min-percent=i' => \$email_git_min_percent,
253		'git-since=s' => \$email_git_since,
254		'hg-since=s' => \$email_hg_since,
255		'i|interactive!' => \$interactive,
256		'remove-duplicates!' => \$email_remove_duplicates,
257		'mailmap!' => \$email_use_mailmap,
258		'm!' => \$email_maintainer,
259		'r!' => \$email_reviewer,
260		'n!' => \$email_usename,
261		'l!' => \$email_list,
262		'fixes!' => \$email_fixes,
263		'moderated!' => \$email_moderated_list,
264		's!' => \$email_subscriber_list,
265		'multiline!' => \$output_multiline,
266		'roles!' => \$output_roles,
267		'rolestats!' => \$output_rolestats,
268		'separator=s' => \$output_separator,
269		'subsystem!' => \$subsystem,
270		'status!' => \$status,
271		'scm!' => \$scm,
272		'tree!' => \$tree,
273		'web!' => \$web,
274		'letters=s' => \$letters,
275		'pattern-depth=i' => \$pattern_depth,
276		'k|keywords!' => \$keywords,
277		'kf|keywords-in-file!' => \$keywords_in_file,
278		'sections!' => \$sections,
279		'fe|file-emails!' => \$email_file_emails,
280		'f|file' => \$from_filename,
281		'find-maintainer-files' => \$find_maintainer_files,
282		'mpath|maintainer-path=s' => \$maintainer_path,
283		'self-test:s' => \$self_test,
284		'v|version' => \$version,
285		'h|help|usage' => \$help,
286		)) {
287    die "$P: invalid argument - use --help if necessary\n";
288}
289
290if ($help != 0) {
291    usage();
292    exit 0;
293}
294
295if ($version != 0) {
296    print("${P} ${V}\n");
297    exit 0;
298}
299
300if (defined $self_test) {
301    read_all_maintainer_files();
302    self_test();
303    exit 0;
304}
305
306if (-t STDIN && !@ARGV) {
307    # We're talking to a terminal, but have no command line arguments.
308    die "$P: missing patchfile or -f file - use --help if necessary\n";
309}
310
311$output_multiline = 0 if ($output_separator ne ", ");
312$output_rolestats = 1 if ($interactive);
313$output_roles = 1 if ($output_rolestats);
314
315if ($sections || $letters ne "") {
316    $sections = 1;
317    $email = 0;
318    $email_list = 0;
319    $scm = 0;
320    $status = 0;
321    $subsystem = 0;
322    $web = 0;
323    $keywords = 0;
324    $keywords_in_file = 0;
325    $interactive = 0;
326} else {
327    my $selections = $email + $scm + $status + $subsystem + $web;
328    if ($selections == 0) {
329	die "$P:  Missing required option: email, scm, status, subsystem or web\n";
330    }
331}
332
333if ($email &&
334    ($email_maintainer + $email_reviewer +
335     $email_list + $email_subscriber_list +
336     $email_git + $email_git_penguin_chiefs + $email_git_blame) == 0) {
337    die "$P: Please select at least 1 email option\n";
338}
339
340if ($tree && !top_of_kernel_tree($lk_path)) {
341    die "$P: The current directory does not appear to be "
342	. "a linux kernel source tree.\n";
343}
344
345## Read MAINTAINERS for type/value pairs
346
347my @typevalue = ();
348my %keyword_hash;
349my @mfiles = ();
350my @self_test_info = ();
351
352sub read_maintainer_file {
353    my ($file) = @_;
354
355    open (my $maint, '<', "$file")
356	or die "$P: Can't open MAINTAINERS file '$file': $!\n";
357    my $i = 1;
358    while (<$maint>) {
359	my $line = $_;
360	chomp $line;
361
362	if ($line =~ m/^([A-Z]):\s*(.*)/) {
363	    my $type = $1;
364	    my $value = $2;
365
366	    ##Filename pattern matching
367	    if ($type eq "F" || $type eq "X") {
368		$value =~ s@\.@\\\.@g;       ##Convert . to \.
369		$value =~ s/\*/\.\*/g;       ##Convert * to .*
370		$value =~ s/\?/\./g;         ##Convert ? to .
371		##if pattern is a directory and it lacks a trailing slash, add one
372		if ((-d $value)) {
373		    $value =~ s@([^/])$@$1/@;
374		}
375	    } elsif ($type eq "K") {
376		$keyword_hash{@typevalue} = $value;
377	    }
378	    push(@typevalue, "$type:$value");
379	} elsif (!(/^\s*$/ || /^\s*\#/)) {
380	    push(@typevalue, $line);
381	}
382	if (defined $self_test) {
383	    push(@self_test_info, {file=>$file, linenr=>$i, line=>$line});
384	}
385	$i++;
386    }
387    close($maint);
388}
389
390sub find_is_maintainer_file {
391    my ($file) = $_;
392    return if ($file !~ m@/MAINTAINERS$@);
393    $file = $File::Find::name;
394    return if (! -f $file);
395    push(@mfiles, $file);
396}
397
398sub find_ignore_git {
399    return grep { $_ !~ /^\.git$/; } @_;
400}
401
402read_all_maintainer_files();
403
404sub read_all_maintainer_files {
405    my $path = "${lk_path}MAINTAINERS";
406    if (defined $maintainer_path) {
407	$path = $maintainer_path;
408	# Perl Cookbook tilde expansion if necessary
409	$path =~ s@^~([^/]*)@ $1 ? (getpwnam($1))[7] : ( $ENV{HOME} || $ENV{LOGDIR} || (getpwuid($<))[7])@ex;
410    }
411
412    if (-d $path) {
413	$path .= '/' if ($path !~ m@/$@);
414	if ($find_maintainer_files) {
415	    find( { wanted => \&find_is_maintainer_file,
416		    preprocess => \&find_ignore_git,
417		    no_chdir => 1,
418		}, "$path");
419	} else {
420	    opendir(DIR, "$path") or die $!;
421	    my @files = readdir(DIR);
422	    closedir(DIR);
423	    foreach my $file (@files) {
424		push(@mfiles, "$path$file") if ($file !~ /^\./);
425	    }
426	}
427    } elsif (-f "$path") {
428	push(@mfiles, "$path");
429    } else {
430	die "$P: MAINTAINER file not found '$path'\n";
431    }
432    die "$P: No MAINTAINER files found in '$path'\n" if (scalar(@mfiles) == 0);
433    foreach my $file (@mfiles) {
434	read_maintainer_file("$file");
435    }
436}
437
438sub maintainers_in_file {
439    my ($file) = @_;
440
441    return if ($file =~ m@\bMAINTAINERS$@);
442
443    if (-f $file && ($email_file_emails || $file =~ /\.yaml$/)) {
444	open(my $f, '<', $file)
445	    or die "$P: Can't open $file: $!\n";
446	my $text = do { local($/) ; <$f> };
447	close($f);
448
449	my @poss_addr = $text =~ m$[\p{L}\"\' \,\.\+-]*\s*[\,]*\s*[\(\<\{]{0,1}[A-Za-z0-9_\.\+-]+\@[A-Za-z0-9\.-]+\.[A-Za-z0-9]+[\)\>\}]{0,1}$g;
450	push(@file_emails, clean_file_emails(@poss_addr));
451    }
452}
453
454#
455# Read mail address map
456#
457
458my $mailmap;
459
460read_mailmap();
461
462sub read_mailmap {
463    $mailmap = {
464	names => {},
465	addresses => {}
466    };
467
468    return if (!$email_use_mailmap || !(-f "${lk_path}.mailmap"));
469
470    open(my $mailmap_file, '<', "${lk_path}.mailmap")
471	or warn "$P: Can't open .mailmap: $!\n";
472
473    while (<$mailmap_file>) {
474	s/#.*$//; #strip comments
475	s/^\s+|\s+$//g; #trim
476
477	next if (/^\s*$/); #skip empty lines
478	#entries have one of the following formats:
479	# name1 <mail1>
480	# <mail1> <mail2>
481	# name1 <mail1> <mail2>
482	# name1 <mail1> name2 <mail2>
483	# (see man git-shortlog)
484
485	if (/^([^<]+)<([^>]+)>$/) {
486	    my $real_name = $1;
487	    my $address = $2;
488
489	    $real_name =~ s/\s+$//;
490	    ($real_name, $address) = parse_email("$real_name <$address>");
491	    $mailmap->{names}->{$address} = $real_name;
492
493	} elsif (/^<([^>]+)>\s*<([^>]+)>$/) {
494	    my $real_address = $1;
495	    my $wrong_address = $2;
496
497	    $mailmap->{addresses}->{$wrong_address} = $real_address;
498
499	} elsif (/^(.+)<([^>]+)>\s*<([^>]+)>$/) {
500	    my $real_name = $1;
501	    my $real_address = $2;
502	    my $wrong_address = $3;
503
504	    $real_name =~ s/\s+$//;
505	    ($real_name, $real_address) =
506		parse_email("$real_name <$real_address>");
507	    $mailmap->{names}->{$wrong_address} = $real_name;
508	    $mailmap->{addresses}->{$wrong_address} = $real_address;
509
510	} elsif (/^(.+)<([^>]+)>\s*(.+)\s*<([^>]+)>$/) {
511	    my $real_name = $1;
512	    my $real_address = $2;
513	    my $wrong_name = $3;
514	    my $wrong_address = $4;
515
516	    $real_name =~ s/\s+$//;
517	    ($real_name, $real_address) =
518		parse_email("$real_name <$real_address>");
519
520	    $wrong_name =~ s/\s+$//;
521	    ($wrong_name, $wrong_address) =
522		parse_email("$wrong_name <$wrong_address>");
523
524	    my $wrong_email = format_email($wrong_name, $wrong_address, 1);
525	    $mailmap->{names}->{$wrong_email} = $real_name;
526	    $mailmap->{addresses}->{$wrong_email} = $real_address;
527	}
528    }
529    close($mailmap_file);
530}
531
532## use the filenames on the command line or find the filenames in the patchfiles
533
534if (!@ARGV) {
535    push(@ARGV, "&STDIN");
536}
537
538foreach my $file (@ARGV) {
539    if ($file ne "&STDIN") {
540	$file = canonpath($file);
541	##if $file is a directory and it lacks a trailing slash, add one
542	if ((-d $file)) {
543	    $file =~ s@([^/])$@$1/@;
544	} elsif (!(-f $file)) {
545	    die "$P: file '${file}' not found\n";
546	}
547    }
548    if ($from_filename && (vcs_exists() && !vcs_file_exists($file))) {
549	warn "$P: file '$file' not found in version control $!\n";
550    }
551    if ($from_filename || ($file ne "&STDIN" && vcs_file_exists($file))) {
552	$file =~ s/^\Q${cur_path}\E//;	#strip any absolute path
553	$file =~ s/^\Q${lk_path}\E//;	#or the path to the lk tree
554	push(@files, $file);
555	if ($file ne "MAINTAINERS" && -f $file && $keywords && $keywords_in_file) {
556	    open(my $f, '<', $file)
557		or die "$P: Can't open $file: $!\n";
558	    my $text = do { local($/) ; <$f> };
559	    close($f);
560	    foreach my $line (keys %keyword_hash) {
561		if ($text =~ m/$keyword_hash{$line}/x) {
562		    push(@keyword_tvi, $line);
563		}
564	    }
565	}
566    } else {
567	my $file_cnt = @files;
568	my $lastfile;
569
570	open(my $patch, "< $file")
571	    or die "$P: Can't open $file: $!\n";
572
573	# We can check arbitrary information before the patch
574	# like the commit message, mail headers, etc...
575	# This allows us to match arbitrary keywords against any part
576	# of a git format-patch generated file (subject tags, etc...)
577
578	my $patch_prefix = "";			#Parsing the intro
579
580	while (<$patch>) {
581	    my $patch_line = $_;
582	    if (m/^ mode change [0-7]+ => [0-7]+ (\S+)\s*$/) {
583		my $filename = $1;
584		push(@files, $filename);
585	    } elsif (m/^rename (?:from|to) (\S+)\s*$/) {
586		my $filename = $1;
587		push(@files, $filename);
588	    } elsif (m/^diff --git a\/(\S+) b\/(\S+)\s*$/) {
589		my $filename1 = $1;
590		my $filename2 = $2;
591		push(@files, $filename1);
592		push(@files, $filename2);
593	    } elsif (m/^Fixes:\s+([0-9a-fA-F]{6,40})/) {
594		push(@fixes, $1) if ($email_fixes);
595	    } elsif (m/^\+\+\+\s+(\S+)/ or m/^---\s+(\S+)/) {
596		my $filename = $1;
597		$filename =~ s@^[^/]*/@@;
598		$filename =~ s@\n@@;
599		$lastfile = $filename;
600		push(@files, $filename);
601		$patch_prefix = "^[+-].*";	#Now parsing the actual patch
602	    } elsif (m/^\@\@ -(\d+),(\d+)/) {
603		if ($email_git_blame) {
604		    push(@range, "$lastfile:$1:$2");
605		}
606	    } elsif ($keywords) {
607		foreach my $line (keys %keyword_hash) {
608		    if ($patch_line =~ m/${patch_prefix}$keyword_hash{$line}/x) {
609			push(@keyword_tvi, $line);
610		    }
611		}
612	    }
613	}
614	close($patch);
615
616	if ($file_cnt == @files) {
617	    warn "$P: file '${file}' doesn't appear to be a patch.  "
618		. "Add -f to options?\n";
619	}
620	@files = sort_and_uniq(@files);
621    }
622}
623
624@file_emails = uniq(@file_emails);
625@fixes = uniq(@fixes);
626
627my %email_hash_name;
628my %email_hash_address;
629my @email_to = ();
630my %hash_list_to;
631my @list_to = ();
632my @scm = ();
633my @web = ();
634my @subsystem = ();
635my @status = ();
636my %deduplicate_name_hash = ();
637my %deduplicate_address_hash = ();
638
639my @maintainers = get_maintainers();
640if (@maintainers) {
641    @maintainers = merge_email(@maintainers);
642    output(@maintainers);
643}
644
645if ($scm) {
646    @scm = uniq(@scm);
647    output(@scm);
648}
649
650if ($status) {
651    @status = uniq(@status);
652    output(@status);
653}
654
655if ($subsystem) {
656    @subsystem = uniq(@subsystem);
657    output(@subsystem);
658}
659
660if ($web) {
661    @web = uniq(@web);
662    output(@web);
663}
664
665exit($exit);
666
667sub self_test {
668    my @lsfiles = ();
669    my @good_links = ();
670    my @bad_links = ();
671    my @section_headers = ();
672    my $index = 0;
673
674    @lsfiles = vcs_list_files($lk_path);
675
676    for my $x (@self_test_info) {
677	$index++;
678
679	## Section header duplication and missing section content
680	if (($self_test eq "" || $self_test =~ /\bsections\b/) &&
681	    $x->{line} =~ /^\S[^:]/ &&
682	    defined $self_test_info[$index] &&
683	    $self_test_info[$index]->{line} =~ /^([A-Z]):\s*\S/) {
684	    my $has_S = 0;
685	    my $has_F = 0;
686	    my $has_ML = 0;
687	    my $status = "";
688	    if (grep(m@^\Q$x->{line}\E@, @section_headers)) {
689		print("$x->{file}:$x->{linenr}: warning: duplicate section header\t$x->{line}\n");
690	    } else {
691		push(@section_headers, $x->{line});
692	    }
693	    my $nextline = $index;
694	    while (defined $self_test_info[$nextline] &&
695		   $self_test_info[$nextline]->{line} =~ /^([A-Z]):\s*(\S.*)/) {
696		my $type = $1;
697		my $value = $2;
698		if ($type eq "S") {
699		    $has_S = 1;
700		    $status = $value;
701		} elsif ($type eq "F" || $type eq "N") {
702		    $has_F = 1;
703		} elsif ($type eq "M" || $type eq "R" || $type eq "L") {
704		    $has_ML = 1;
705		}
706		$nextline++;
707	    }
708	    if (!$has_ML && $status !~ /orphan|obsolete/i) {
709		print("$x->{file}:$x->{linenr}: warning: section without email address\t$x->{line}\n");
710	    }
711	    if (!$has_S) {
712		print("$x->{file}:$x->{linenr}: warning: section without status \t$x->{line}\n");
713	    }
714	    if (!$has_F) {
715		print("$x->{file}:$x->{linenr}: warning: section without file pattern\t$x->{line}\n");
716	    }
717	}
718
719	next if ($x->{line} !~ /^([A-Z]):\s*(.*)/);
720
721	my $type = $1;
722	my $value = $2;
723
724	## Filename pattern matching
725	if (($type eq "F" || $type eq "X") &&
726	    ($self_test eq "" || $self_test =~ /\bpatterns\b/)) {
727	    $value =~ s@\.@\\\.@g;       ##Convert . to \.
728	    $value =~ s/\*/\.\*/g;       ##Convert * to .*
729	    $value =~ s/\?/\./g;         ##Convert ? to .
730	    ##if pattern is a directory and it lacks a trailing slash, add one
731	    if ((-d $value)) {
732		$value =~ s@([^/])$@$1/@;
733	    }
734	    if (!grep(m@^$value@, @lsfiles)) {
735		print("$x->{file}:$x->{linenr}: warning: no file matches\t$x->{line}\n");
736	    }
737
738	## Link reachability
739	} elsif (($type eq "W" || $type eq "Q" || $type eq "B") &&
740		 $value =~ /^https?:/ &&
741		 ($self_test eq "" || $self_test =~ /\blinks\b/)) {
742	    next if (grep(m@^\Q$value\E$@, @good_links));
743	    my $isbad = 0;
744	    if (grep(m@^\Q$value\E$@, @bad_links)) {
745	        $isbad = 1;
746	    } else {
747		my $output = `wget --spider -q --no-check-certificate --timeout 10 --tries 1 $value`;
748		if ($? == 0) {
749		    push(@good_links, $value);
750		} else {
751		    push(@bad_links, $value);
752		    $isbad = 1;
753		}
754	    }
755	    if ($isbad) {
756	        print("$x->{file}:$x->{linenr}: warning: possible bad link\t$x->{line}\n");
757	    }
758
759	## SCM reachability
760	} elsif ($type eq "T" &&
761		 ($self_test eq "" || $self_test =~ /\bscm\b/)) {
762	    next if (grep(m@^\Q$value\E$@, @good_links));
763	    my $isbad = 0;
764	    if (grep(m@^\Q$value\E$@, @bad_links)) {
765	        $isbad = 1;
766            } elsif ($value !~ /^(?:git|quilt|hg)\s+\S/) {
767		print("$x->{file}:$x->{linenr}: warning: malformed entry\t$x->{line}\n");
768	    } elsif ($value =~ /^git\s+(\S+)(\s+([^\(]+\S+))?/) {
769		my $url = $1;
770		my $branch = "";
771		$branch = $3 if $3;
772		my $output = `git ls-remote --exit-code -h "$url" $branch > /dev/null 2>&1`;
773		if ($? == 0) {
774		    push(@good_links, $value);
775		} else {
776		    push(@bad_links, $value);
777		    $isbad = 1;
778		}
779	    } elsif ($value =~ /^(?:quilt|hg)\s+(https?:\S+)/) {
780		my $url = $1;
781		my $output = `wget --spider -q --no-check-certificate --timeout 10 --tries 1 $url`;
782		if ($? == 0) {
783		    push(@good_links, $value);
784		} else {
785		    push(@bad_links, $value);
786		    $isbad = 1;
787		}
788	    }
789	    if ($isbad) {
790		print("$x->{file}:$x->{linenr}: warning: possible bad link\t$x->{line}\n");
791	    }
792	}
793    }
794}
795
796sub ignore_email_address {
797    my ($address) = @_;
798
799    foreach my $ignore (@ignore_emails) {
800	return 1 if ($ignore eq $address);
801    }
802
803    return 0;
804}
805
806sub range_is_maintained {
807    my ($start, $end) = @_;
808
809    for (my $i = $start; $i < $end; $i++) {
810	my $line = $typevalue[$i];
811	if ($line =~ m/^([A-Z]):\s*(.*)/) {
812	    my $type = $1;
813	    my $value = $2;
814	    if ($type eq 'S') {
815		if ($value =~ /(maintain|support)/i) {
816		    return 1;
817		}
818	    }
819	}
820    }
821    return 0;
822}
823
824sub range_has_maintainer {
825    my ($start, $end) = @_;
826
827    for (my $i = $start; $i < $end; $i++) {
828	my $line = $typevalue[$i];
829	if ($line =~ m/^([A-Z]):\s*(.*)/) {
830	    my $type = $1;
831	    my $value = $2;
832	    if ($type eq 'M') {
833		return 1;
834	    }
835	}
836    }
837    return 0;
838}
839
840sub get_maintainers {
841    %email_hash_name = ();
842    %email_hash_address = ();
843    %commit_author_hash = ();
844    %commit_signer_hash = ();
845    @email_to = ();
846    %hash_list_to = ();
847    @list_to = ();
848    @scm = ();
849    @web = ();
850    @subsystem = ();
851    @status = ();
852    %deduplicate_name_hash = ();
853    %deduplicate_address_hash = ();
854    if ($email_git_all_signature_types) {
855	$signature_pattern = "(.+?)[Bb][Yy]:";
856    } else {
857	$signature_pattern = "\(" . join("|", @signature_tags) . "\)";
858    }
859
860    # Find responsible parties
861
862    my %exact_pattern_match_hash = ();
863
864    foreach my $file (@files) {
865
866	my %hash;
867	my $tvi = find_first_section();
868	while ($tvi < @typevalue) {
869	    my $start = find_starting_index($tvi);
870	    my $end = find_ending_index($tvi);
871	    my $exclude = 0;
872	    my $i;
873
874	    #Do not match excluded file patterns
875
876	    for ($i = $start; $i < $end; $i++) {
877		my $line = $typevalue[$i];
878		if ($line =~ m/^([A-Z]):\s*(.*)/) {
879		    my $type = $1;
880		    my $value = $2;
881		    if ($type eq 'X') {
882			if (file_match_pattern($file, $value)) {
883			    $exclude = 1;
884			    last;
885			}
886		    }
887		}
888	    }
889
890	    if (!$exclude) {
891		for ($i = $start; $i < $end; $i++) {
892		    my $line = $typevalue[$i];
893		    if ($line =~ m/^([A-Z]):\s*(.*)/) {
894			my $type = $1;
895			my $value = $2;
896			if ($type eq 'F') {
897			    if (file_match_pattern($file, $value)) {
898				my $value_pd = ($value =~ tr@/@@);
899				my $file_pd = ($file  =~ tr@/@@);
900				$value_pd++ if (substr($value,-1,1) ne "/");
901				$value_pd = -1 if ($value =~ /^\.\*/);
902				if ($value_pd >= $file_pd &&
903				    range_is_maintained($start, $end) &&
904				    range_has_maintainer($start, $end)) {
905				    $exact_pattern_match_hash{$file} = 1;
906				}
907				if ($pattern_depth == 0 ||
908				    (($file_pd - $value_pd) < $pattern_depth)) {
909				    $hash{$tvi} = $value_pd;
910				}
911			    }
912			} elsif ($type eq 'N') {
913			    if ($file =~ m/$value/x) {
914				$hash{$tvi} = 0;
915			    }
916			}
917		    }
918		}
919	    }
920	    $tvi = $end + 1;
921	}
922
923	foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
924	    add_categories($line, "");
925	    if ($sections) {
926		my $i;
927		my $start = find_starting_index($line);
928		my $end = find_ending_index($line);
929		for ($i = $start; $i < $end; $i++) {
930		    my $line = $typevalue[$i];
931		    if ($line =~ /^[FX]:/) {		##Restore file patterns
932			$line =~ s/([^\\])\.([^\*])/$1\?$2/g;
933			$line =~ s/([^\\])\.$/$1\?/g;	##Convert . back to ?
934			$line =~ s/\\\./\./g;       	##Convert \. to .
935			$line =~ s/\.\*/\*/g;       	##Convert .* to *
936		    }
937		    my $count = $line =~ s/^([A-Z]):/$1:\t/g;
938		    if ($letters eq "" || (!$count || $letters =~ /$1/i)) {
939			print("$line\n");
940		    }
941		}
942		print("\n");
943	    }
944	}
945
946	maintainers_in_file($file);
947    }
948
949    if ($keywords) {
950	@keyword_tvi = sort_and_uniq(@keyword_tvi);
951	foreach my $line (@keyword_tvi) {
952	    add_categories($line, ":Keyword:$keyword_hash{$line}");
953	}
954    }
955
956    foreach my $email (@email_to, @list_to) {
957	$email->[0] = deduplicate_email($email->[0]);
958    }
959
960    foreach my $file (@files) {
961	if ($email &&
962	    ($email_git ||
963	     ($email_git_fallback &&
964	      $file !~ /MAINTAINERS$/ &&
965	      !$exact_pattern_match_hash{$file}))) {
966	    vcs_file_signoffs($file);
967	}
968	if ($email && $email_git_blame) {
969	    vcs_file_blame($file);
970	}
971    }
972
973    if ($email) {
974	foreach my $chief (@penguin_chief) {
975	    if ($chief =~ m/^(.*):(.*)/) {
976		my $email_address;
977
978		$email_address = format_email($1, $2, $email_usename);
979		if ($email_git_penguin_chiefs) {
980		    push(@email_to, [$email_address, 'chief penguin']);
981		} else {
982		    @email_to = grep($_->[0] !~ /${email_address}/, @email_to);
983		}
984	    }
985	}
986
987	foreach my $email (@file_emails) {
988	    $email = mailmap_email($email);
989	    my ($name, $address) = parse_email($email);
990
991	    my $tmp_email = format_email($name, $address, $email_usename);
992	    push_email_address($tmp_email, '');
993	    add_role($tmp_email, 'in file');
994	}
995    }
996
997    foreach my $fix (@fixes) {
998	vcs_add_commit_signers($fix, "blamed_fixes");
999    }
1000
1001    my @to = ();
1002    if ($email || $email_list) {
1003	if ($email) {
1004	    @to = (@to, @email_to);
1005	}
1006	if ($email_list) {
1007	    @to = (@to, @list_to);
1008	}
1009    }
1010
1011    if ($interactive) {
1012	@to = interactive_get_maintainers(\@to);
1013    }
1014
1015    return @to;
1016}
1017
1018sub file_match_pattern {
1019    my ($file, $pattern) = @_;
1020    if (substr($pattern, -1) eq "/") {
1021	if ($file =~ m@^$pattern@) {
1022	    return 1;
1023	}
1024    } else {
1025	if ($file =~ m@^$pattern@) {
1026	    my $s1 = ($file =~ tr@/@@);
1027	    my $s2 = ($pattern =~ tr@/@@);
1028	    if ($s1 == $s2) {
1029		return 1;
1030	    }
1031	}
1032    }
1033    return 0;
1034}
1035
1036sub usage {
1037    print <<EOT;
1038usage: $P [options] patchfile
1039       $P [options] -f file|directory
1040version: $V
1041
1042MAINTAINER field selection options:
1043  --email => print email address(es) if any
1044    --git => include recent git \*-by: signers
1045    --git-all-signature-types => include signers regardless of signature type
1046        or use only ${signature_pattern} signers (default: $email_git_all_signature_types)
1047    --git-fallback => use git when no exact MAINTAINERS pattern (default: $email_git_fallback)
1048    --git-chief-penguins => include ${penguin_chiefs}
1049    --git-min-signatures => number of signatures required (default: $email_git_min_signatures)
1050    --git-max-maintainers => maximum maintainers to add (default: $email_git_max_maintainers)
1051    --git-min-percent => minimum percentage of commits required (default: $email_git_min_percent)
1052    --git-blame => use git blame to find modified commits for patch or file
1053    --git-blame-signatures => when used with --git-blame, also include all commit signers
1054    --git-since => git history to use (default: $email_git_since)
1055    --hg-since => hg history to use (default: $email_hg_since)
1056    --interactive => display a menu (mostly useful if used with the --git option)
1057    --m => include maintainer(s) if any
1058    --r => include reviewer(s) if any
1059    --n => include name 'Full Name <addr\@domain.tld>'
1060    --l => include list(s) if any
1061    --moderated => include moderated lists(s) if any (default: true)
1062    --s => include subscriber only list(s) if any (default: false)
1063    --remove-duplicates => minimize duplicate email names/addresses
1064    --roles => show roles (status:subsystem, git-signer, list, etc...)
1065    --rolestats => show roles and statistics (commits/total_commits, %)
1066    --file-emails => add email addresses found in -f file (default: 0 (off))
1067    --fixes => for patches, add signatures of commits with 'Fixes: <commit>' (default: 1 (on))
1068  --scm => print SCM tree(s) if any
1069  --status => print status if any
1070  --subsystem => print subsystem name if any
1071  --web => print website(s) if any
1072
1073Output type options:
1074  --separator [, ] => separator for multiple entries on 1 line
1075    using --separator also sets --nomultiline if --separator is not [, ]
1076  --multiline => print 1 entry per line
1077
1078Other options:
1079  --pattern-depth => Number of pattern directory traversals (default: 0 (all))
1080  --keywords => scan patch for keywords (default: $keywords)
1081  --keywords-in-file => scan file for keywords (default: $keywords_in_file)
1082  --sections => print all of the subsystem sections with pattern matches
1083  --letters => print all matching 'letter' types from all matching sections
1084  --mailmap => use .mailmap file (default: $email_use_mailmap)
1085  --no-tree => run without a kernel tree
1086  --self-test => show potential issues with MAINTAINERS file content
1087  --version => show version
1088  --help => show this help information
1089
1090Default options:
1091  [--email --tree --nogit --git-fallback --m --r --n --l --multiline
1092   --pattern-depth=0 --remove-duplicates --rolestats --keywords]
1093
1094Notes:
1095  Using "-f directory" may give unexpected results:
1096      Used with "--git", git signators for _all_ files in and below
1097          directory are examined as git recurses directories.
1098          Any specified X: (exclude) pattern matches are _not_ ignored.
1099      Used with "--nogit", directory is used as a pattern match,
1100          no individual file within the directory or subdirectory
1101          is matched.
1102      Used with "--git-blame", does not iterate all files in directory
1103  Using "--git-blame" is slow and may add old committers and authors
1104      that are no longer active maintainers to the output.
1105  Using "--roles" or "--rolestats" with git send-email --cc-cmd or any
1106      other automated tools that expect only ["name"] <email address>
1107      may not work because of additional output after <email address>.
1108  Using "--rolestats" and "--git-blame" shows the #/total=% commits,
1109      not the percentage of the entire file authored.  # of commits is
1110      not a good measure of amount of code authored.  1 major commit may
1111      contain a thousand lines, 5 trivial commits may modify a single line.
1112  If git is not installed, but mercurial (hg) is installed and an .hg
1113      repository exists, the following options apply to mercurial:
1114          --git,
1115          --git-min-signatures, --git-max-maintainers, --git-min-percent, and
1116          --git-blame
1117      Use --hg-since not --git-since to control date selection
1118  File ".get_maintainer.conf", if it exists in the linux kernel source root
1119      directory, can change whatever get_maintainer defaults are desired.
1120      Entries in this file can be any command line argument.
1121      This file is prepended to any additional command line arguments.
1122      Multiple lines and # comments are allowed.
1123  Most options have both positive and negative forms.
1124      The negative forms for --<foo> are --no<foo> and --no-<foo>.
1125
1126EOT
1127}
1128
1129sub top_of_kernel_tree {
1130    my ($lk_path) = @_;
1131
1132    if ($lk_path ne "" && substr($lk_path,length($lk_path)-1,1) ne "/") {
1133	$lk_path .= "/";
1134    }
1135    if (   (-f "${lk_path}COPYING")
1136	&& (-f "${lk_path}CREDITS")
1137	&& (-f "${lk_path}Kbuild")
1138	&& (-e "${lk_path}MAINTAINERS")
1139	&& (-f "${lk_path}Makefile")
1140	&& (-f "${lk_path}README")
1141	&& (-d "${lk_path}Documentation")
1142	&& (-d "${lk_path}arch")
1143	&& (-d "${lk_path}include")
1144	&& (-d "${lk_path}drivers")
1145	&& (-d "${lk_path}fs")
1146	&& (-d "${lk_path}init")
1147	&& (-d "${lk_path}ipc")
1148	&& (-d "${lk_path}kernel")
1149	&& (-d "${lk_path}lib")
1150	&& (-d "${lk_path}scripts")) {
1151	return 1;
1152    }
1153    return 0;
1154}
1155
1156sub escape_name {
1157    my ($name) = @_;
1158
1159    if ($name =~ /[^\w \-]/ai) {  	 ##has "must quote" chars
1160	$name =~ s/(?<!\\)"/\\"/g;       ##escape quotes
1161	$name = "\"$name\"";
1162    }
1163
1164    return $name;
1165}
1166
1167sub parse_email {
1168    my ($formatted_email) = @_;
1169
1170    my $name = "";
1171    my $address = "";
1172
1173    if ($formatted_email =~ /^([^<]+)<(.+\@.*)>.*$/) {
1174	$name = $1;
1175	$address = $2;
1176    } elsif ($formatted_email =~ /^\s*<(.+\@\S*)>.*$/) {
1177	$address = $1;
1178    } elsif ($formatted_email =~ /^(.+\@\S*).*$/) {
1179	$address = $1;
1180    }
1181
1182    $name =~ s/^\s+|\s+$//g;
1183    $name =~ s/^\"|\"$//g;
1184    $name = escape_name($name);
1185    $address =~ s/^\s+|\s+$//g;
1186
1187    return ($name, $address);
1188}
1189
1190sub format_email {
1191    my ($name, $address, $usename) = @_;
1192
1193    my $formatted_email;
1194
1195    $name =~ s/^\s+|\s+$//g;
1196    $name =~ s/^\"|\"$//g;
1197    $name = escape_name($name);
1198    $address =~ s/^\s+|\s+$//g;
1199
1200    if ($usename) {
1201	if ("$name" eq "") {
1202	    $formatted_email = "$address";
1203	} else {
1204	    $formatted_email = "$name <$address>";
1205	}
1206    } else {
1207	$formatted_email = $address;
1208    }
1209
1210    return $formatted_email;
1211}
1212
1213sub find_first_section {
1214    my $index = 0;
1215
1216    while ($index < @typevalue) {
1217	my $tv = $typevalue[$index];
1218	if (($tv =~ m/^([A-Z]):\s*(.*)/)) {
1219	    last;
1220	}
1221	$index++;
1222    }
1223
1224    return $index;
1225}
1226
1227sub find_starting_index {
1228    my ($index) = @_;
1229
1230    while ($index > 0) {
1231	my $tv = $typevalue[$index];
1232	if (!($tv =~ m/^([A-Z]):\s*(.*)/)) {
1233	    last;
1234	}
1235	$index--;
1236    }
1237
1238    return $index;
1239}
1240
1241sub find_ending_index {
1242    my ($index) = @_;
1243
1244    while ($index < @typevalue) {
1245	my $tv = $typevalue[$index];
1246	if (!($tv =~ m/^([A-Z]):\s*(.*)/)) {
1247	    last;
1248	}
1249	$index++;
1250    }
1251
1252    return $index;
1253}
1254
1255sub get_subsystem_name {
1256    my ($index) = @_;
1257
1258    my $start = find_starting_index($index);
1259
1260    my $subsystem = $typevalue[$start];
1261    if ($output_section_maxlen && length($subsystem) > $output_section_maxlen) {
1262	$subsystem = substr($subsystem, 0, $output_section_maxlen - 3);
1263	$subsystem =~ s/\s*$//;
1264	$subsystem = $subsystem . "...";
1265    }
1266    return $subsystem;
1267}
1268
1269sub get_maintainer_role {
1270    my ($index) = @_;
1271
1272    my $i;
1273    my $start = find_starting_index($index);
1274    my $end = find_ending_index($index);
1275
1276    my $role = "unknown";
1277    my $subsystem = get_subsystem_name($index);
1278
1279    for ($i = $start + 1; $i < $end; $i++) {
1280	my $tv = $typevalue[$i];
1281	if ($tv =~ m/^([A-Z]):\s*(.*)/) {
1282	    my $ptype = $1;
1283	    my $pvalue = $2;
1284	    if ($ptype eq "S") {
1285		$role = $pvalue;
1286	    }
1287	}
1288    }
1289
1290    $role = lc($role);
1291    if      ($role eq "supported") {
1292	$role = "supporter";
1293    } elsif ($role eq "maintained") {
1294	$role = "maintainer";
1295    } elsif ($role eq "odd fixes") {
1296	$role = "odd fixer";
1297    } elsif ($role eq "orphan") {
1298	$role = "orphan minder";
1299    } elsif ($role eq "obsolete") {
1300	$role = "obsolete minder";
1301    } elsif ($role eq "buried alive in reporters") {
1302	$role = "chief penguin";
1303    }
1304
1305    return $role . ":" . $subsystem;
1306}
1307
1308sub get_list_role {
1309    my ($index) = @_;
1310
1311    my $subsystem = get_subsystem_name($index);
1312
1313    if ($subsystem eq "THE REST") {
1314	$subsystem = "";
1315    }
1316
1317    return $subsystem;
1318}
1319
1320sub add_categories {
1321    my ($index, $suffix) = @_;
1322
1323    my $i;
1324    my $start = find_starting_index($index);
1325    my $end = find_ending_index($index);
1326
1327    push(@subsystem, $typevalue[$start]);
1328
1329    for ($i = $start + 1; $i < $end; $i++) {
1330	my $tv = $typevalue[$i];
1331	if ($tv =~ m/^([A-Z]):\s*(.*)/) {
1332	    my $ptype = $1;
1333	    my $pvalue = $2;
1334	    if ($ptype eq "L") {
1335		my $list_address = $pvalue;
1336		my $list_additional = "";
1337		my $list_role = get_list_role($i);
1338
1339		if ($list_role ne "") {
1340		    $list_role = ":" . $list_role;
1341		}
1342		if ($list_address =~ m/([^\s]+)\s+(.*)$/) {
1343		    $list_address = $1;
1344		    $list_additional = $2;
1345		}
1346		if ($list_additional =~ m/subscribers-only/) {
1347		    if ($email_subscriber_list) {
1348			if (!$hash_list_to{lc($list_address)}) {
1349			    $hash_list_to{lc($list_address)} = 1;
1350			    push(@list_to, [$list_address,
1351					    "subscriber list${list_role}" . $suffix]);
1352			}
1353		    }
1354		} else {
1355		    if ($email_list) {
1356			if (!$hash_list_to{lc($list_address)}) {
1357			    if ($list_additional =~ m/moderated/) {
1358				if ($email_moderated_list) {
1359				    $hash_list_to{lc($list_address)} = 1;
1360				    push(@list_to, [$list_address,
1361						    "moderated list${list_role}" . $suffix]);
1362				}
1363			    } else {
1364				$hash_list_to{lc($list_address)} = 1;
1365				push(@list_to, [$list_address,
1366						"open list${list_role}" . $suffix]);
1367			    }
1368			}
1369		    }
1370		}
1371	    } elsif ($ptype eq "M") {
1372		if ($email_maintainer) {
1373		    my $role = get_maintainer_role($i);
1374		    push_email_addresses($pvalue, $role . $suffix);
1375		}
1376	    } elsif ($ptype eq "R") {
1377		if ($email_reviewer) {
1378		    my $subsystem = get_subsystem_name($i);
1379		    push_email_addresses($pvalue, "reviewer:$subsystem" . $suffix);
1380		}
1381	    } elsif ($ptype eq "T") {
1382		push(@scm, $pvalue . $suffix);
1383	    } elsif ($ptype eq "W") {
1384		push(@web, $pvalue . $suffix);
1385	    } elsif ($ptype eq "S") {
1386		push(@status, $pvalue . $suffix);
1387	    }
1388	}
1389    }
1390}
1391
1392sub email_inuse {
1393    my ($name, $address) = @_;
1394
1395    return 1 if (($name eq "") && ($address eq ""));
1396    return 1 if (($name ne "") && exists($email_hash_name{lc($name)}));
1397    return 1 if (($address ne "") && exists($email_hash_address{lc($address)}));
1398
1399    return 0;
1400}
1401
1402sub push_email_address {
1403    my ($line, $role) = @_;
1404
1405    my ($name, $address) = parse_email($line);
1406
1407    if ($address eq "") {
1408	return 0;
1409    }
1410
1411    if (!$email_remove_duplicates) {
1412	push(@email_to, [format_email($name, $address, $email_usename), $role]);
1413    } elsif (!email_inuse($name, $address)) {
1414	push(@email_to, [format_email($name, $address, $email_usename), $role]);
1415	$email_hash_name{lc($name)}++ if ($name ne "");
1416	$email_hash_address{lc($address)}++;
1417    }
1418
1419    return 1;
1420}
1421
1422sub push_email_addresses {
1423    my ($address, $role) = @_;
1424
1425    my @address_list = ();
1426
1427    if (rfc822_valid($address)) {
1428	push_email_address($address, $role);
1429    } elsif (@address_list = rfc822_validlist($address)) {
1430	my $array_count = shift(@address_list);
1431	while (my $entry = shift(@address_list)) {
1432	    push_email_address($entry, $role);
1433	}
1434    } else {
1435	if (!push_email_address($address, $role)) {
1436	    warn("Invalid MAINTAINERS address: '" . $address . "'\n");
1437	}
1438    }
1439}
1440
1441sub add_role {
1442    my ($line, $role) = @_;
1443
1444    my ($name, $address) = parse_email($line);
1445    my $email = format_email($name, $address, $email_usename);
1446
1447    foreach my $entry (@email_to) {
1448	if ($email_remove_duplicates) {
1449	    my ($entry_name, $entry_address) = parse_email($entry->[0]);
1450	    if (($name eq $entry_name || $address eq $entry_address)
1451		&& ($role eq "" || !($entry->[1] =~ m/$role/))
1452	    ) {
1453		if ($entry->[1] eq "") {
1454		    $entry->[1] = "$role";
1455		} else {
1456		    $entry->[1] = "$entry->[1],$role";
1457		}
1458	    }
1459	} else {
1460	    if ($email eq $entry->[0]
1461		&& ($role eq "" || !($entry->[1] =~ m/$role/))
1462	    ) {
1463		if ($entry->[1] eq "") {
1464		    $entry->[1] = "$role";
1465		} else {
1466		    $entry->[1] = "$entry->[1],$role";
1467		}
1468	    }
1469	}
1470    }
1471}
1472
1473sub which {
1474    my ($bin) = @_;
1475
1476    foreach my $path (split(/:/, $ENV{PATH})) {
1477	if (-e "$path/$bin") {
1478	    return "$path/$bin";
1479	}
1480    }
1481
1482    return "";
1483}
1484
1485sub which_conf {
1486    my ($conf) = @_;
1487
1488    foreach my $path (split(/:/, ".:$ENV{HOME}:.scripts")) {
1489	if (-e "$path/$conf") {
1490	    return "$path/$conf";
1491	}
1492    }
1493
1494    return "";
1495}
1496
1497sub mailmap_email {
1498    my ($line) = @_;
1499
1500    my ($name, $address) = parse_email($line);
1501    my $email = format_email($name, $address, 1);
1502    my $real_name = $name;
1503    my $real_address = $address;
1504
1505    if (exists $mailmap->{names}->{$email} ||
1506	exists $mailmap->{addresses}->{$email}) {
1507	if (exists $mailmap->{names}->{$email}) {
1508	    $real_name = $mailmap->{names}->{$email};
1509	}
1510	if (exists $mailmap->{addresses}->{$email}) {
1511	    $real_address = $mailmap->{addresses}->{$email};
1512	}
1513    } else {
1514	if (exists $mailmap->{names}->{$address}) {
1515	    $real_name = $mailmap->{names}->{$address};
1516	}
1517	if (exists $mailmap->{addresses}->{$address}) {
1518	    $real_address = $mailmap->{addresses}->{$address};
1519	}
1520    }
1521    return format_email($real_name, $real_address, 1);
1522}
1523
1524sub mailmap {
1525    my (@addresses) = @_;
1526
1527    my @mapped_emails = ();
1528    foreach my $line (@addresses) {
1529	push(@mapped_emails, mailmap_email($line));
1530    }
1531    merge_by_realname(@mapped_emails) if ($email_use_mailmap);
1532    return @mapped_emails;
1533}
1534
1535sub merge_by_realname {
1536    my %address_map;
1537    my (@emails) = @_;
1538
1539    foreach my $email (@emails) {
1540	my ($name, $address) = parse_email($email);
1541	if (exists $address_map{$name}) {
1542	    $address = $address_map{$name};
1543	    $email = format_email($name, $address, 1);
1544	} else {
1545	    $address_map{$name} = $address;
1546	}
1547    }
1548}
1549
1550sub git_execute_cmd {
1551    my ($cmd) = @_;
1552    my @lines = ();
1553
1554    my $output = `$cmd`;
1555    $output =~ s/^\s*//gm;
1556    @lines = split("\n", $output);
1557
1558    return @lines;
1559}
1560
1561sub hg_execute_cmd {
1562    my ($cmd) = @_;
1563    my @lines = ();
1564
1565    my $output = `$cmd`;
1566    @lines = split("\n", $output);
1567
1568    return @lines;
1569}
1570
1571sub extract_formatted_signatures {
1572    my (@signature_lines) = @_;
1573
1574    my @type = @signature_lines;
1575
1576    s/\s*(.*):.*/$1/ for (@type);
1577
1578    # cut -f2- -d":"
1579    s/\s*.*:\s*(.+)\s*/$1/ for (@signature_lines);
1580
1581## Reformat email addresses (with names) to avoid badly written signatures
1582
1583    foreach my $signer (@signature_lines) {
1584	$signer = deduplicate_email($signer);
1585    }
1586
1587    return (\@type, \@signature_lines);
1588}
1589
1590sub vcs_find_signers {
1591    my ($cmd, $file) = @_;
1592    my $commits;
1593    my @lines = ();
1594    my @signatures = ();
1595    my @authors = ();
1596    my @stats = ();
1597
1598    @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
1599
1600    my $pattern = $VCS_cmds{"commit_pattern"};
1601    my $author_pattern = $VCS_cmds{"author_pattern"};
1602    my $stat_pattern = $VCS_cmds{"stat_pattern"};
1603
1604    $stat_pattern =~ s/(\$\w+)/$1/eeg;		#interpolate $stat_pattern
1605
1606    $commits = grep(/$pattern/, @lines);	# of commits
1607
1608    @authors = grep(/$author_pattern/, @lines);
1609    @signatures = grep(/^[ \t]*${signature_pattern}.*\@.*$/, @lines);
1610    @stats = grep(/$stat_pattern/, @lines);
1611
1612#    print("stats: <@stats>\n");
1613
1614    return (0, \@signatures, \@authors, \@stats) if !@signatures;
1615
1616    save_commits_by_author(@lines) if ($interactive);
1617    save_commits_by_signer(@lines) if ($interactive);
1618
1619    if (!$email_git_penguin_chiefs) {
1620	@signatures = grep(!/${penguin_chiefs}/i, @signatures);
1621    }
1622
1623    my ($author_ref, $authors_ref) = extract_formatted_signatures(@authors);
1624    my ($types_ref, $signers_ref) = extract_formatted_signatures(@signatures);
1625
1626    return ($commits, $signers_ref, $authors_ref, \@stats);
1627}
1628
1629sub vcs_find_author {
1630    my ($cmd) = @_;
1631    my @lines = ();
1632
1633    @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
1634
1635    if (!$email_git_penguin_chiefs) {
1636	@lines = grep(!/${penguin_chiefs}/i, @lines);
1637    }
1638
1639    return @lines if !@lines;
1640
1641    my @authors = ();
1642    foreach my $line (@lines) {
1643	if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
1644	    my $author = $1;
1645	    my ($name, $address) = parse_email($author);
1646	    $author = format_email($name, $address, 1);
1647	    push(@authors, $author);
1648	}
1649    }
1650
1651    save_commits_by_author(@lines) if ($interactive);
1652    save_commits_by_signer(@lines) if ($interactive);
1653
1654    return @authors;
1655}
1656
1657sub vcs_save_commits {
1658    my ($cmd) = @_;
1659    my @lines = ();
1660    my @commits = ();
1661
1662    @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
1663
1664    foreach my $line (@lines) {
1665	if ($line =~ m/$VCS_cmds{"blame_commit_pattern"}/) {
1666	    push(@commits, $1);
1667	}
1668    }
1669
1670    return @commits;
1671}
1672
1673sub vcs_blame {
1674    my ($file) = @_;
1675    my $cmd;
1676    my @commits = ();
1677
1678    return @commits if (!(-f $file));
1679
1680    if (@range && $VCS_cmds{"blame_range_cmd"} eq "") {
1681	my @all_commits = ();
1682
1683	$cmd = $VCS_cmds{"blame_file_cmd"};
1684	$cmd =~ s/(\$\w+)/$1/eeg;		#interpolate $cmd
1685	@all_commits = vcs_save_commits($cmd);
1686
1687	foreach my $file_range_diff (@range) {
1688	    next if (!($file_range_diff =~ m/(.+):(.+):(.+)/));
1689	    my $diff_file = $1;
1690	    my $diff_start = $2;
1691	    my $diff_length = $3;
1692	    next if ("$file" ne "$diff_file");
1693	    for (my $i = $diff_start; $i < $diff_start + $diff_length; $i++) {
1694		push(@commits, $all_commits[$i]);
1695	    }
1696	}
1697    } elsif (@range) {
1698	foreach my $file_range_diff (@range) {
1699	    next if (!($file_range_diff =~ m/(.+):(.+):(.+)/));
1700	    my $diff_file = $1;
1701	    my $diff_start = $2;
1702	    my $diff_length = $3;
1703	    next if ("$file" ne "$diff_file");
1704	    $cmd = $VCS_cmds{"blame_range_cmd"};
1705	    $cmd =~ s/(\$\w+)/$1/eeg;		#interpolate $cmd
1706	    push(@commits, vcs_save_commits($cmd));
1707	}
1708    } else {
1709	$cmd = $VCS_cmds{"blame_file_cmd"};
1710	$cmd =~ s/(\$\w+)/$1/eeg;		#interpolate $cmd
1711	@commits = vcs_save_commits($cmd);
1712    }
1713
1714    foreach my $commit (@commits) {
1715	$commit =~ s/^\^//g;
1716    }
1717
1718    return @commits;
1719}
1720
1721my $printed_novcs = 0;
1722sub vcs_exists {
1723    %VCS_cmds = %VCS_cmds_git;
1724    return 1 if eval $VCS_cmds{"available"};
1725    %VCS_cmds = %VCS_cmds_hg;
1726    return 2 if eval $VCS_cmds{"available"};
1727    %VCS_cmds = ();
1728    if (!$printed_novcs && $email_git) {
1729	warn("$P: No supported VCS found.  Add --nogit to options?\n");
1730	warn("Using a git repository produces better results.\n");
1731	warn("Try Linus Torvalds' latest git repository using:\n");
1732	warn("git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git\n");
1733	$printed_novcs = 1;
1734    }
1735    return 0;
1736}
1737
1738sub vcs_is_git {
1739    vcs_exists();
1740    return $vcs_used == 1;
1741}
1742
1743sub vcs_is_hg {
1744    return $vcs_used == 2;
1745}
1746
1747sub vcs_add_commit_signers {
1748    return if (!vcs_exists());
1749
1750    my ($commit, $desc) = @_;
1751    my $commit_count = 0;
1752    my $commit_authors_ref;
1753    my $commit_signers_ref;
1754    my $stats_ref;
1755    my @commit_authors = ();
1756    my @commit_signers = ();
1757    my $cmd;
1758
1759    $cmd = $VCS_cmds{"find_commit_signers_cmd"};
1760    $cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
1761
1762    ($commit_count, $commit_signers_ref, $commit_authors_ref, $stats_ref) = vcs_find_signers($cmd, "");
1763    @commit_authors = @{$commit_authors_ref} if defined $commit_authors_ref;
1764    @commit_signers = @{$commit_signers_ref} if defined $commit_signers_ref;
1765
1766    foreach my $signer (@commit_signers) {
1767	$signer = deduplicate_email($signer);
1768    }
1769
1770    vcs_assign($desc, 1, @commit_signers);
1771}
1772
1773sub interactive_get_maintainers {
1774    my ($list_ref) = @_;
1775    my @list = @$list_ref;
1776
1777    vcs_exists();
1778
1779    my %selected;
1780    my %authored;
1781    my %signed;
1782    my $count = 0;
1783    my $maintained = 0;
1784    foreach my $entry (@list) {
1785	$maintained = 1 if ($entry->[1] =~ /^(maintainer|supporter)/i);
1786	$selected{$count} = 1;
1787	$authored{$count} = 0;
1788	$signed{$count} = 0;
1789	$count++;
1790    }
1791
1792    #menu loop
1793    my $done = 0;
1794    my $print_options = 0;
1795    my $redraw = 1;
1796    while (!$done) {
1797	$count = 0;
1798	if ($redraw) {
1799	    printf STDERR "\n%1s %2s %-65s",
1800			  "*", "#", "email/list and role:stats";
1801	    if ($email_git ||
1802		($email_git_fallback && !$maintained) ||
1803		$email_git_blame) {
1804		print STDERR "auth sign";
1805	    }
1806	    print STDERR "\n";
1807	    foreach my $entry (@list) {
1808		my $email = $entry->[0];
1809		my $role = $entry->[1];
1810		my $sel = "";
1811		$sel = "*" if ($selected{$count});
1812		my $commit_author = $commit_author_hash{$email};
1813		my $commit_signer = $commit_signer_hash{$email};
1814		my $authored = 0;
1815		my $signed = 0;
1816		$authored++ for (@{$commit_author});
1817		$signed++ for (@{$commit_signer});
1818		printf STDERR "%1s %2d %-65s", $sel, $count + 1, $email;
1819		printf STDERR "%4d %4d", $authored, $signed
1820		    if ($authored > 0 || $signed > 0);
1821		printf STDERR "\n     %s\n", $role;
1822		if ($authored{$count}) {
1823		    my $commit_author = $commit_author_hash{$email};
1824		    foreach my $ref (@{$commit_author}) {
1825			print STDERR "     Author: @{$ref}[1]\n";
1826		    }
1827		}
1828		if ($signed{$count}) {
1829		    my $commit_signer = $commit_signer_hash{$email};
1830		    foreach my $ref (@{$commit_signer}) {
1831			print STDERR "     @{$ref}[2]: @{$ref}[1]\n";
1832		    }
1833		}
1834
1835		$count++;
1836	    }
1837	}
1838	my $date_ref = \$email_git_since;
1839	$date_ref = \$email_hg_since if (vcs_is_hg());
1840	if ($print_options) {
1841	    $print_options = 0;
1842	    if (vcs_exists()) {
1843		print STDERR <<EOT
1844
1845Version Control options:
1846g  use git history      [$email_git]
1847gf use git-fallback     [$email_git_fallback]
1848b  use git blame        [$email_git_blame]
1849bs use blame signatures [$email_git_blame_signatures]
1850c# minimum commits      [$email_git_min_signatures]
1851%# min percent          [$email_git_min_percent]
1852d# history to use       [$$date_ref]
1853x# max maintainers      [$email_git_max_maintainers]
1854t  all signature types  [$email_git_all_signature_types]
1855m  use .mailmap         [$email_use_mailmap]
1856EOT
1857	    }
1858	    print STDERR <<EOT
1859
1860Additional options:
18610  toggle all
1862tm toggle maintainers
1863tg toggle git entries
1864tl toggle open list entries
1865ts toggle subscriber list entries
1866f  emails in file       [$email_file_emails]
1867k  keywords in file     [$keywords]
1868r  remove duplicates    [$email_remove_duplicates]
1869p# pattern match depth  [$pattern_depth]
1870EOT
1871	}
1872	print STDERR
1873"\n#(toggle), A#(author), S#(signed) *(all), ^(none), O(options), Y(approve): ";
1874
1875	my $input = <STDIN>;
1876	chomp($input);
1877
1878	$redraw = 1;
1879	my $rerun = 0;
1880	my @wish = split(/[, ]+/, $input);
1881	foreach my $nr (@wish) {
1882	    $nr = lc($nr);
1883	    my $sel = substr($nr, 0, 1);
1884	    my $str = substr($nr, 1);
1885	    my $val = 0;
1886	    $val = $1 if $str =~ /^(\d+)$/;
1887
1888	    if ($sel eq "y") {
1889		$interactive = 0;
1890		$done = 1;
1891		$output_rolestats = 0;
1892		$output_roles = 0;
1893		last;
1894	    } elsif ($nr =~ /^\d+$/ && $nr > 0 && $nr <= $count) {
1895		$selected{$nr - 1} = !$selected{$nr - 1};
1896	    } elsif ($sel eq "*" || $sel eq '^') {
1897		my $toggle = 0;
1898		$toggle = 1 if ($sel eq '*');
1899		for (my $i = 0; $i < $count; $i++) {
1900		    $selected{$i} = $toggle;
1901		}
1902	    } elsif ($sel eq "0") {
1903		for (my $i = 0; $i < $count; $i++) {
1904		    $selected{$i} = !$selected{$i};
1905		}
1906	    } elsif ($sel eq "t") {
1907		if (lc($str) eq "m") {
1908		    for (my $i = 0; $i < $count; $i++) {
1909			$selected{$i} = !$selected{$i}
1910			    if ($list[$i]->[1] =~ /^(maintainer|supporter)/i);
1911		    }
1912		} elsif (lc($str) eq "g") {
1913		    for (my $i = 0; $i < $count; $i++) {
1914			$selected{$i} = !$selected{$i}
1915			    if ($list[$i]->[1] =~ /^(author|commit|signer)/i);
1916		    }
1917		} elsif (lc($str) eq "l") {
1918		    for (my $i = 0; $i < $count; $i++) {
1919			$selected{$i} = !$selected{$i}
1920			    if ($list[$i]->[1] =~ /^(open list)/i);
1921		    }
1922		} elsif (lc($str) eq "s") {
1923		    for (my $i = 0; $i < $count; $i++) {
1924			$selected{$i} = !$selected{$i}
1925			    if ($list[$i]->[1] =~ /^(subscriber list)/i);
1926		    }
1927		}
1928	    } elsif ($sel eq "a") {
1929		if ($val > 0 && $val <= $count) {
1930		    $authored{$val - 1} = !$authored{$val - 1};
1931		} elsif ($str eq '*' || $str eq '^') {
1932		    my $toggle = 0;
1933		    $toggle = 1 if ($str eq '*');
1934		    for (my $i = 0; $i < $count; $i++) {
1935			$authored{$i} = $toggle;
1936		    }
1937		}
1938	    } elsif ($sel eq "s") {
1939		if ($val > 0 && $val <= $count) {
1940		    $signed{$val - 1} = !$signed{$val - 1};
1941		} elsif ($str eq '*' || $str eq '^') {
1942		    my $toggle = 0;
1943		    $toggle = 1 if ($str eq '*');
1944		    for (my $i = 0; $i < $count; $i++) {
1945			$signed{$i} = $toggle;
1946		    }
1947		}
1948	    } elsif ($sel eq "o") {
1949		$print_options = 1;
1950		$redraw = 1;
1951	    } elsif ($sel eq "g") {
1952		if ($str eq "f") {
1953		    bool_invert(\$email_git_fallback);
1954		} else {
1955		    bool_invert(\$email_git);
1956		}
1957		$rerun = 1;
1958	    } elsif ($sel eq "b") {
1959		if ($str eq "s") {
1960		    bool_invert(\$email_git_blame_signatures);
1961		} else {
1962		    bool_invert(\$email_git_blame);
1963		}
1964		$rerun = 1;
1965	    } elsif ($sel eq "c") {
1966		if ($val > 0) {
1967		    $email_git_min_signatures = $val;
1968		    $rerun = 1;
1969		}
1970	    } elsif ($sel eq "x") {
1971		if ($val > 0) {
1972		    $email_git_max_maintainers = $val;
1973		    $rerun = 1;
1974		}
1975	    } elsif ($sel eq "%") {
1976		if ($str ne "" && $val >= 0) {
1977		    $email_git_min_percent = $val;
1978		    $rerun = 1;
1979		}
1980	    } elsif ($sel eq "d") {
1981		if (vcs_is_git()) {
1982		    $email_git_since = $str;
1983		} elsif (vcs_is_hg()) {
1984		    $email_hg_since = $str;
1985		}
1986		$rerun = 1;
1987	    } elsif ($sel eq "t") {
1988		bool_invert(\$email_git_all_signature_types);
1989		$rerun = 1;
1990	    } elsif ($sel eq "f") {
1991		bool_invert(\$email_file_emails);
1992		$rerun = 1;
1993	    } elsif ($sel eq "r") {
1994		bool_invert(\$email_remove_duplicates);
1995		$rerun = 1;
1996	    } elsif ($sel eq "m") {
1997		bool_invert(\$email_use_mailmap);
1998		read_mailmap();
1999		$rerun = 1;
2000	    } elsif ($sel eq "k") {
2001		bool_invert(\$keywords);
2002		$rerun = 1;
2003	    } elsif ($sel eq "p") {
2004		if ($str ne "" && $val >= 0) {
2005		    $pattern_depth = $val;
2006		    $rerun = 1;
2007		}
2008	    } elsif ($sel eq "h" || $sel eq "?") {
2009		print STDERR <<EOT
2010
2011Interactive mode allows you to select the various maintainers, submitters,
2012commit signers and mailing lists that could be CC'd on a patch.
2013
2014Any *'d entry is selected.
2015
2016If you have git or hg installed, you can choose to summarize the commit
2017history of files in the patch.  Also, each line of the current file can
2018be matched to its commit author and that commits signers with blame.
2019
2020Various knobs exist to control the length of time for active commit
2021tracking, the maximum number of commit authors and signers to add,
2022and such.
2023
2024Enter selections at the prompt until you are satisfied that the selected
2025maintainers are appropriate.  You may enter multiple selections separated
2026by either commas or spaces.
2027
2028EOT
2029	    } else {
2030		print STDERR "invalid option: '$nr'\n";
2031		$redraw = 0;
2032	    }
2033	}
2034	if ($rerun) {
2035	    print STDERR "git-blame can be very slow, please have patience..."
2036		if ($email_git_blame);
2037	    goto &get_maintainers;
2038	}
2039    }
2040
2041    #drop not selected entries
2042    $count = 0;
2043    my @new_emailto = ();
2044    foreach my $entry (@list) {
2045	if ($selected{$count}) {
2046	    push(@new_emailto, $list[$count]);
2047	}
2048	$count++;
2049    }
2050    return @new_emailto;
2051}
2052
2053sub bool_invert {
2054    my ($bool_ref) = @_;
2055
2056    if ($$bool_ref) {
2057	$$bool_ref = 0;
2058    } else {
2059	$$bool_ref = 1;
2060    }
2061}
2062
2063sub deduplicate_email {
2064    my ($email) = @_;
2065
2066    my $matched = 0;
2067    my ($name, $address) = parse_email($email);
2068    $email = format_email($name, $address, 1);
2069    $email = mailmap_email($email);
2070
2071    return $email if (!$email_remove_duplicates);
2072
2073    ($name, $address) = parse_email($email);
2074
2075    if ($name ne "" && $deduplicate_name_hash{lc($name)}) {
2076	$name = $deduplicate_name_hash{lc($name)}->[0];
2077	$address = $deduplicate_name_hash{lc($name)}->[1];
2078	$matched = 1;
2079    } elsif ($deduplicate_address_hash{lc($address)}) {
2080	$name = $deduplicate_address_hash{lc($address)}->[0];
2081	$address = $deduplicate_address_hash{lc($address)}->[1];
2082	$matched = 1;
2083    }
2084    if (!$matched) {
2085	$deduplicate_name_hash{lc($name)} = [ $name, $address ];
2086	$deduplicate_address_hash{lc($address)} = [ $name, $address ];
2087    }
2088    $email = format_email($name, $address, 1);
2089    $email = mailmap_email($email);
2090    return $email;
2091}
2092
2093sub save_commits_by_author {
2094    my (@lines) = @_;
2095
2096    my @authors = ();
2097    my @commits = ();
2098    my @subjects = ();
2099
2100    foreach my $line (@lines) {
2101	if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
2102	    my $author = $1;
2103	    $author = deduplicate_email($author);
2104	    push(@authors, $author);
2105	}
2106	push(@commits, $1) if ($line =~ m/$VCS_cmds{"commit_pattern"}/);
2107	push(@subjects, $1) if ($line =~ m/$VCS_cmds{"subject_pattern"}/);
2108    }
2109
2110    for (my $i = 0; $i < @authors; $i++) {
2111	my $exists = 0;
2112	foreach my $ref(@{$commit_author_hash{$authors[$i]}}) {
2113	    if (@{$ref}[0] eq $commits[$i] &&
2114		@{$ref}[1] eq $subjects[$i]) {
2115		$exists = 1;
2116		last;
2117	    }
2118	}
2119	if (!$exists) {
2120	    push(@{$commit_author_hash{$authors[$i]}},
2121		 [ ($commits[$i], $subjects[$i]) ]);
2122	}
2123    }
2124}
2125
2126sub save_commits_by_signer {
2127    my (@lines) = @_;
2128
2129    my $commit = "";
2130    my $subject = "";
2131
2132    foreach my $line (@lines) {
2133	$commit = $1 if ($line =~ m/$VCS_cmds{"commit_pattern"}/);
2134	$subject = $1 if ($line =~ m/$VCS_cmds{"subject_pattern"}/);
2135	if ($line =~ /^[ \t]*${signature_pattern}.*\@.*$/) {
2136	    my @signatures = ($line);
2137	    my ($types_ref, $signers_ref) = extract_formatted_signatures(@signatures);
2138	    my @types = @$types_ref;
2139	    my @signers = @$signers_ref;
2140
2141	    my $type = $types[0];
2142	    my $signer = $signers[0];
2143
2144	    $signer = deduplicate_email($signer);
2145
2146	    my $exists = 0;
2147	    foreach my $ref(@{$commit_signer_hash{$signer}}) {
2148		if (@{$ref}[0] eq $commit &&
2149		    @{$ref}[1] eq $subject &&
2150		    @{$ref}[2] eq $type) {
2151		    $exists = 1;
2152		    last;
2153		}
2154	    }
2155	    if (!$exists) {
2156		push(@{$commit_signer_hash{$signer}},
2157		     [ ($commit, $subject, $type) ]);
2158	    }
2159	}
2160    }
2161}
2162
2163sub vcs_assign {
2164    my ($role, $divisor, @lines) = @_;
2165
2166    my %hash;
2167    my $count = 0;
2168
2169    return if (@lines <= 0);
2170
2171    if ($divisor <= 0) {
2172	warn("Bad divisor in " . (caller(0))[3] . ": $divisor\n");
2173	$divisor = 1;
2174    }
2175
2176    @lines = mailmap(@lines);
2177
2178    return if (@lines <= 0);
2179
2180    @lines = sort(@lines);
2181
2182    # uniq -c
2183    $hash{$_}++ for @lines;
2184
2185    # sort -rn
2186    foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
2187	my $sign_offs = $hash{$line};
2188	my $percent = $sign_offs * 100 / $divisor;
2189
2190	$percent = 100 if ($percent > 100);
2191	next if (ignore_email_address($line));
2192	$count++;
2193	last if ($sign_offs < $email_git_min_signatures ||
2194		 $count > $email_git_max_maintainers ||
2195		 $percent < $email_git_min_percent);
2196	push_email_address($line, '');
2197	if ($output_rolestats) {
2198	    my $fmt_percent = sprintf("%.0f", $percent);
2199	    add_role($line, "$role:$sign_offs/$divisor=$fmt_percent%");
2200	} else {
2201	    add_role($line, $role);
2202	}
2203    }
2204}
2205
2206sub vcs_file_signoffs {
2207    my ($file) = @_;
2208
2209    my $authors_ref;
2210    my $signers_ref;
2211    my $stats_ref;
2212    my @authors = ();
2213    my @signers = ();
2214    my @stats = ();
2215    my $commits;
2216
2217    $vcs_used = vcs_exists();
2218    return if (!$vcs_used);
2219
2220    my $cmd = $VCS_cmds{"find_signers_cmd"};
2221    $cmd =~ s/(\$\w+)/$1/eeg;		# interpolate $cmd
2222
2223    ($commits, $signers_ref, $authors_ref, $stats_ref) = vcs_find_signers($cmd, $file);
2224
2225    @signers = @{$signers_ref} if defined $signers_ref;
2226    @authors = @{$authors_ref} if defined $authors_ref;
2227    @stats = @{$stats_ref} if defined $stats_ref;
2228
2229#    print("commits: <$commits>\nsigners:<@signers>\nauthors: <@authors>\nstats: <@stats>\n");
2230
2231    foreach my $signer (@signers) {
2232	$signer = deduplicate_email($signer);
2233    }
2234
2235    vcs_assign("commit_signer", $commits, @signers);
2236    vcs_assign("authored", $commits, @authors);
2237    if ($#authors == $#stats) {
2238	my $stat_pattern = $VCS_cmds{"stat_pattern"};
2239	$stat_pattern =~ s/(\$\w+)/$1/eeg;	#interpolate $stat_pattern
2240
2241	my $added = 0;
2242	my $deleted = 0;
2243	for (my $i = 0; $i <= $#stats; $i++) {
2244	    if ($stats[$i] =~ /$stat_pattern/) {
2245		$added += $1;
2246		$deleted += $2;
2247	    }
2248	}
2249	my @tmp_authors = uniq(@authors);
2250	foreach my $author (@tmp_authors) {
2251	    $author = deduplicate_email($author);
2252	}
2253	@tmp_authors = uniq(@tmp_authors);
2254	my @list_added = ();
2255	my @list_deleted = ();
2256	foreach my $author (@tmp_authors) {
2257	    my $auth_added = 0;
2258	    my $auth_deleted = 0;
2259	    for (my $i = 0; $i <= $#stats; $i++) {
2260		if ($author eq deduplicate_email($authors[$i]) &&
2261		    $stats[$i] =~ /$stat_pattern/) {
2262		    $auth_added += $1;
2263		    $auth_deleted += $2;
2264		}
2265	    }
2266	    for (my $i = 0; $i < $auth_added; $i++) {
2267		push(@list_added, $author);
2268	    }
2269	    for (my $i = 0; $i < $auth_deleted; $i++) {
2270		push(@list_deleted, $author);
2271	    }
2272	}
2273	vcs_assign("added_lines", $added, @list_added);
2274	vcs_assign("removed_lines", $deleted, @list_deleted);
2275    }
2276}
2277
2278sub vcs_file_blame {
2279    my ($file) = @_;
2280
2281    my @signers = ();
2282    my @all_commits = ();
2283    my @commits = ();
2284    my $total_commits;
2285    my $total_lines;
2286
2287    $vcs_used = vcs_exists();
2288    return if (!$vcs_used);
2289
2290    @all_commits = vcs_blame($file);
2291    @commits = uniq(@all_commits);
2292    $total_commits = @commits;
2293    $total_lines = @all_commits;
2294
2295    if ($email_git_blame_signatures) {
2296	if (vcs_is_hg()) {
2297	    my $commit_count;
2298	    my $commit_authors_ref;
2299	    my $commit_signers_ref;
2300	    my $stats_ref;
2301	    my @commit_authors = ();
2302	    my @commit_signers = ();
2303	    my $commit = join(" -r ", @commits);
2304	    my $cmd;
2305
2306	    $cmd = $VCS_cmds{"find_commit_signers_cmd"};
2307	    $cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
2308
2309	    ($commit_count, $commit_signers_ref, $commit_authors_ref, $stats_ref) = vcs_find_signers($cmd, $file);
2310	    @commit_authors = @{$commit_authors_ref} if defined $commit_authors_ref;
2311	    @commit_signers = @{$commit_signers_ref} if defined $commit_signers_ref;
2312
2313	    push(@signers, @commit_signers);
2314	} else {
2315	    foreach my $commit (@commits) {
2316		my $commit_count;
2317		my $commit_authors_ref;
2318		my $commit_signers_ref;
2319		my $stats_ref;
2320		my @commit_authors = ();
2321		my @commit_signers = ();
2322		my $cmd;
2323
2324		$cmd = $VCS_cmds{"find_commit_signers_cmd"};
2325		$cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
2326
2327		($commit_count, $commit_signers_ref, $commit_authors_ref, $stats_ref) = vcs_find_signers($cmd, $file);
2328		@commit_authors = @{$commit_authors_ref} if defined $commit_authors_ref;
2329		@commit_signers = @{$commit_signers_ref} if defined $commit_signers_ref;
2330
2331		push(@signers, @commit_signers);
2332	    }
2333	}
2334    }
2335
2336    if ($from_filename) {
2337	if ($output_rolestats) {
2338	    my @blame_signers;
2339	    if (vcs_is_hg()) {{		# Double brace for last exit
2340		my $commit_count;
2341		my @commit_signers = ();
2342		@commits = uniq(@commits);
2343		@commits = sort(@commits);
2344		my $commit = join(" -r ", @commits);
2345		my $cmd;
2346
2347		$cmd = $VCS_cmds{"find_commit_author_cmd"};
2348		$cmd =~ s/(\$\w+)/$1/eeg;	#substitute variables in $cmd
2349
2350		my @lines = ();
2351
2352		@lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
2353
2354		if (!$email_git_penguin_chiefs) {
2355		    @lines = grep(!/${penguin_chiefs}/i, @lines);
2356		}
2357
2358		last if !@lines;
2359
2360		my @authors = ();
2361		foreach my $line (@lines) {
2362		    if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
2363			my $author = $1;
2364			$author = deduplicate_email($author);
2365			push(@authors, $author);
2366		    }
2367		}
2368
2369		save_commits_by_author(@lines) if ($interactive);
2370		save_commits_by_signer(@lines) if ($interactive);
2371
2372		push(@signers, @authors);
2373	    }}
2374	    else {
2375		foreach my $commit (@commits) {
2376		    my $i;
2377		    my $cmd = $VCS_cmds{"find_commit_author_cmd"};
2378		    $cmd =~ s/(\$\w+)/$1/eeg;	#interpolate $cmd
2379		    my @author = vcs_find_author($cmd);
2380		    next if !@author;
2381
2382		    my $formatted_author = deduplicate_email($author[0]);
2383
2384		    my $count = grep(/$commit/, @all_commits);
2385		    for ($i = 0; $i < $count ; $i++) {
2386			push(@blame_signers, $formatted_author);
2387		    }
2388		}
2389	    }
2390	    if (@blame_signers) {
2391		vcs_assign("authored lines", $total_lines, @blame_signers);
2392	    }
2393	}
2394	foreach my $signer (@signers) {
2395	    $signer = deduplicate_email($signer);
2396	}
2397	vcs_assign("commits", $total_commits, @signers);
2398    } else {
2399	foreach my $signer (@signers) {
2400	    $signer = deduplicate_email($signer);
2401	}
2402	vcs_assign("modified commits", $total_commits, @signers);
2403    }
2404}
2405
2406sub vcs_file_exists {
2407    my ($file) = @_;
2408
2409    my $exists;
2410
2411    my $vcs_used = vcs_exists();
2412    return 0 if (!$vcs_used);
2413
2414    my $cmd = $VCS_cmds{"file_exists_cmd"};
2415    $cmd =~ s/(\$\w+)/$1/eeg;		# interpolate $cmd
2416    $cmd .= " 2>&1";
2417    $exists = &{$VCS_cmds{"execute_cmd"}}($cmd);
2418
2419    return 0 if ($? != 0);
2420
2421    return $exists;
2422}
2423
2424sub vcs_list_files {
2425    my ($file) = @_;
2426
2427    my @lsfiles = ();
2428
2429    my $vcs_used = vcs_exists();
2430    return 0 if (!$vcs_used);
2431
2432    my $cmd = $VCS_cmds{"list_files_cmd"};
2433    $cmd =~ s/(\$\w+)/$1/eeg;   # interpolate $cmd
2434    @lsfiles = &{$VCS_cmds{"execute_cmd"}}($cmd);
2435
2436    return () if ($? != 0);
2437
2438    return @lsfiles;
2439}
2440
2441sub uniq {
2442    my (@parms) = @_;
2443
2444    my %saw;
2445    @parms = grep(!$saw{$_}++, @parms);
2446    return @parms;
2447}
2448
2449sub sort_and_uniq {
2450    my (@parms) = @_;
2451
2452    my %saw;
2453    @parms = sort @parms;
2454    @parms = grep(!$saw{$_}++, @parms);
2455    return @parms;
2456}
2457
2458sub clean_file_emails {
2459    my (@file_emails) = @_;
2460    my @fmt_emails = ();
2461
2462    foreach my $email (@file_emails) {
2463	$email =~ s/[\(\<\{]{0,1}([A-Za-z0-9_\.\+-]+\@[A-Za-z0-9\.-]+)[\)\>\}]{0,1}/\<$1\>/g;
2464	my ($name, $address) = parse_email($email);
2465
2466	# Strip quotes for easier processing, format_email will add them back
2467	$name =~ s/^"(.*)"$/$1/;
2468
2469	# Split into name-like parts and remove stray punctuation particles
2470	my @nw = split(/[^\p{L}\'\,\.\+-]/, $name);
2471	@nw = grep(!/^[\'\,\.\+-]$/, @nw);
2472
2473	# Make a best effort to extract the name, and only the name, by taking
2474	# only the last two names, or in the case of obvious initials, the last
2475	# three names.
2476	if (@nw > 2) {
2477	    my $first = $nw[@nw - 3];
2478	    my $middle = $nw[@nw - 2];
2479	    my $last = $nw[@nw - 1];
2480
2481	    if (((length($first) == 1 && $first =~ m/\p{L}/) ||
2482		 (length($first) == 2 && substr($first, -1) eq ".")) ||
2483		(length($middle) == 1 ||
2484		 (length($middle) == 2 && substr($middle, -1) eq "."))) {
2485		$name = "$first $middle $last";
2486	    } else {
2487		$name = "$middle $last";
2488	    }
2489	} else {
2490	    $name = "@nw";
2491	}
2492
2493	if (substr($name, -1) =~ /[,\.]/) {
2494	    $name = substr($name, 0, length($name) - 1);
2495	}
2496
2497	if (substr($name, 0, 1) =~ /[,\.]/) {
2498	    $name = substr($name, 1, length($name) - 1);
2499	}
2500
2501	my $fmt_email = format_email($name, $address, $email_usename);
2502	push(@fmt_emails, $fmt_email);
2503    }
2504    return @fmt_emails;
2505}
2506
2507sub merge_email {
2508    my @lines;
2509    my %saw;
2510
2511    for (@_) {
2512	my ($address, $role) = @$_;
2513	if (!$saw{$address}) {
2514	    if ($output_roles) {
2515		push(@lines, "$address ($role)");
2516	    } else {
2517		push(@lines, $address);
2518	    }
2519	    $saw{$address} = 1;
2520	}
2521    }
2522
2523    return @lines;
2524}
2525
2526sub output {
2527    my (@parms) = @_;
2528
2529    if ($output_multiline) {
2530	foreach my $line (@parms) {
2531	    print("${line}\n");
2532	}
2533    } else {
2534	print(join($output_separator, @parms));
2535	print("\n");
2536    }
2537}
2538
2539my $rfc822re;
2540
2541sub make_rfc822re {
2542#   Basic lexical tokens are specials, domain_literal, quoted_string, atom, and
2543#   comment.  We must allow for rfc822_lwsp (or comments) after each of these.
2544#   This regexp will only work on addresses which have had comments stripped
2545#   and replaced with rfc822_lwsp.
2546
2547    my $specials = '()<>@,;:\\\\".\\[\\]';
2548    my $controls = '\\000-\\037\\177';
2549
2550    my $dtext = "[^\\[\\]\\r\\\\]";
2551    my $domain_literal = "\\[(?:$dtext|\\\\.)*\\]$rfc822_lwsp*";
2552
2553    my $quoted_string = "\"(?:[^\\\"\\r\\\\]|\\\\.|$rfc822_lwsp)*\"$rfc822_lwsp*";
2554
2555#   Use zero-width assertion to spot the limit of an atom.  A simple
2556#   $rfc822_lwsp* causes the regexp engine to hang occasionally.
2557    my $atom = "[^$specials $controls]+(?:$rfc822_lwsp+|\\Z|(?=[\\[\"$specials]))";
2558    my $word = "(?:$atom|$quoted_string)";
2559    my $localpart = "$word(?:\\.$rfc822_lwsp*$word)*";
2560
2561    my $sub_domain = "(?:$atom|$domain_literal)";
2562    my $domain = "$sub_domain(?:\\.$rfc822_lwsp*$sub_domain)*";
2563
2564    my $addr_spec = "$localpart\@$rfc822_lwsp*$domain";
2565
2566    my $phrase = "$word*";
2567    my $route = "(?:\@$domain(?:,\@$rfc822_lwsp*$domain)*:$rfc822_lwsp*)";
2568    my $route_addr = "\\<$rfc822_lwsp*$route?$addr_spec\\>$rfc822_lwsp*";
2569    my $mailbox = "(?:$addr_spec|$phrase$route_addr)";
2570
2571    my $group = "$phrase:$rfc822_lwsp*(?:$mailbox(?:,\\s*$mailbox)*)?;\\s*";
2572    my $address = "(?:$mailbox|$group)";
2573
2574    return "$rfc822_lwsp*$address";
2575}
2576
2577sub rfc822_strip_comments {
2578    my $s = shift;
2579#   Recursively remove comments, and replace with a single space.  The simpler
2580#   regexps in the Email Addressing FAQ are imperfect - they will miss escaped
2581#   chars in atoms, for example.
2582
2583    while ($s =~ s/^((?:[^"\\]|\\.)*
2584                    (?:"(?:[^"\\]|\\.)*"(?:[^"\\]|\\.)*)*)
2585                    \((?:[^()\\]|\\.)*\)/$1 /osx) {}
2586    return $s;
2587}
2588
2589#   valid: returns true if the parameter is an RFC822 valid address
2590#
2591sub rfc822_valid {
2592    my $s = rfc822_strip_comments(shift);
2593
2594    if (!$rfc822re) {
2595        $rfc822re = make_rfc822re();
2596    }
2597
2598    return $s =~ m/^$rfc822re$/so && $s =~ m/^$rfc822_char*$/;
2599}
2600
2601#   validlist: In scalar context, returns true if the parameter is an RFC822
2602#              valid list of addresses.
2603#
2604#              In list context, returns an empty list on failure (an invalid
2605#              address was found); otherwise a list whose first element is the
2606#              number of addresses found and whose remaining elements are the
2607#              addresses.  This is needed to disambiguate failure (invalid)
2608#              from success with no addresses found, because an empty string is
2609#              a valid list.
2610
2611sub rfc822_validlist {
2612    my $s = rfc822_strip_comments(shift);
2613
2614    if (!$rfc822re) {
2615        $rfc822re = make_rfc822re();
2616    }
2617    # * null list items are valid according to the RFC
2618    # * the '1' business is to aid in distinguishing failure from no results
2619
2620    my @r;
2621    if ($s =~ m/^(?:$rfc822re)?(?:,(?:$rfc822re)?)*$/so &&
2622	$s =~ m/^$rfc822_char*$/) {
2623        while ($s =~ m/(?:^|,$rfc822_lwsp*)($rfc822re)/gos) {
2624            push(@r, $1);
2625        }
2626        return wantarray ? (scalar(@r), @r) : 1;
2627    }
2628    return wantarray ? () : 0;
2629}
2630