scripts/get_maintainer.pl

   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
  13 use strict;
  14
  15 my $P = $0;
  16 my $V = '0.26';
  17
  18 use Getopt::Long qw(:config no_auto_abbrev);
  19
  20 my $lk_path = "./";
  21 my $email = 1;
  22 my $email_usename = 1;
  23 my $email_maintainer = 1;
  24 my $email_list = 1;
  25 my $email_subscriber_list = 0;
  26 my $email_git_penguin_chiefs = 0;
  27 my $email_git = 0;
  28 my $email_git_all_signature_types = 0;
  29 my $email_git_blame = 0;
  30 my $email_git_blame_signatures = 1;
  31 my $email_git_fallback = 1;
  32 my $email_git_min_signatures = 1;
  33 my $email_git_max_maintainers = 5;
  34 my $email_git_min_percent = 5;
  35 my $email_git_since = "1-year-ago";
  36 my $email_hg_since = "-365";
  37 my $interactive = 0;
  38 my $email_remove_duplicates = 1;
  39 my $email_use_mailmap = 1;
  40 my $output_multiline = 1;
  41 my $output_separator = ", ";
  42 my $output_roles = 0;
  43 my $output_rolestats = 1;
  44 my $scm = 0;
  45 my $web = 0;
  46 my $subsystem = 0;
  47 my $status = 0;
  48 my $keywords = 1;
  49 my $sections = 0;
  50 my $file_emails = 0;
  51 my $from_filename = 0;
  52 my $pattern_depth = 0;
  53 my $version = 0;
  54 my $help = 0;
  55
  56 my $vcs_used = 0;
  57
  58 my $exit = 0;
  59
  60 my %commit_author_hash;
  61 my %commit_signer_hash;
  62
  63 my @penguin_chief = ();
  64 push(@penguin_chief, "Linus Torvalds:torvalds\@linux-foundation.org");
  65 #Andrew wants in on most everything - 2009/01/14
  66 #push(@penguin_chief, "Andrew Morton:akpm\@linux-foundation.org");
  67
  68 my @penguin_chief_names = ();
  69 foreach my $chief (@penguin_chief) {
  70     if ($chief =~ m/^(.*):(.*)/) {
  71         my $chief_name = $1;
  72         my $chief_addr = $2;
  73         push(@penguin_chief_names, $chief_name);
  74     }
  75 }
  76 my $penguin_chiefs = "\(" . join("|", @penguin_chief_names) . "\)";
  77
  78 # Signature types of people who are either
  79 #       a) responsible for the code in question, or
  80 #       b) familiar enough with it to give relevant feedback
  81 my @signature_tags = ();
  82 push(@signature_tags, "Signed-off-by:");
  83 push(@signature_tags, "Reviewed-by:");
  84 push(@signature_tags, "Acked-by:");
  85
  86 my $signature_pattern = "\(" . join("|", @signature_tags) . "\)";
  87
  88 # rfc822 email address - preloaded methods go here.
  89 my $rfc822_lwsp = "(?:(?:\\r\\n)?[ \\t])";
  90 my $rfc822_char = '[\\000-\\377]';
  91
  92 # VCS command support: class-like functions and strings
  93
  94 my %VCS_cmds;
  95
  96 my %VCS_cmds_git = (
  97     "execute_cmd" => \&git_execute_cmd,
  98     "available" => '(which("git") ne "") && (-d ".git")',
  99     "find_signers_cmd" =>
 100         "git log --no-color --follow --since=\$email_git_since " .
 101             '--numstat --no-merges ' .
 102             '--format="GitCommit: %H%n' .
 103                       'GitAuthor: %an <%ae>%n' .
 104                       'GitDate: %aD%n' .
 105                       'GitSubject: %s%n' .
 106                       '%b%n"' .
 107             " -- \$file",
 108     "find_commit_signers_cmd" =>
 109         "git log --no-color " .
 110             '--numstat ' .
 111             '--format="GitCommit: %H%n' .
 112                       'GitAuthor: %an <%ae>%n' .
 113                       'GitDate: %aD%n' .
 114                       'GitSubject: %s%n' .
 115                       '%b%n"' .
 116             " -1 \$commit",
 117     "find_commit_author_cmd" =>
 118         "git log --no-color " .
 119             '--numstat ' .
 120             '--format="GitCommit: %H%n' .
 121                       'GitAuthor: %an <%ae>%n' .
 122                       'GitDate: %aD%n' .
 123                       'GitSubject: %s%n"' .
 124             " -1 \$commit",
 125     "blame_range_cmd" => "git blame -l -L \$diff_start,+\$diff_length \$file",
 126     "blame_file_cmd" => "git blame -l \$file",
 127     "commit_pattern" => "^GitCommit: ([0-9a-f]{40,40})",
 128     "blame_commit_pattern" => "^([0-9a-f]+) ",
 129     "author_pattern" => "^GitAuthor: (.*)",
 130     "subject_pattern" => "^GitSubject: (.*)",
 131     "stat_pattern" => "^(\\d+)\\t(\\d+)\\t\$file\$",
 132 );
 133
 134 my %VCS_cmds_hg = (
 135     "execute_cmd" => \&hg_execute_cmd,
 136     "available" => '(which("hg") ne "") && (-d ".hg")',
 137     "find_signers_cmd" =>
 138         "hg log --date=\$email_hg_since " .
 139             "--template='HgCommit: {node}\\n" .
 140                         "HgAuthor: {author}\\n" .
 141                         "HgSubject: {desc}\\n'" .
 142             " -- \$file",
 143     "find_commit_signers_cmd" =>
 144         "hg log " .
 145             "--template='HgSubject: {desc}\\n'" .
 146             " -r \$commit",
 147     "find_commit_author_cmd" =>
 148         "hg log " .
 149             "--template='HgCommit: {node}\\n" .
 150                         "HgAuthor: {author}\\n" .
 151                         "HgSubject: {desc|firstline}\\n'" .
 152             " -r \$commit",
 153     "blame_range_cmd" => "",            # not supported
 154     "blame_file_cmd" => "hg blame -n \$file",
 155     "commit_pattern" => "^HgCommit: ([0-9a-f]{40,40})",
 156     "blame_commit_pattern" => "^([ 0-9a-f]+):",
 157     "author_pattern" => "^HgAuthor: (.*)",
 158     "subject_pattern" => "^HgSubject: (.*)",
 159     "stat_pattern" => "^(\\d+)\t(\\d+)\t\$file\$",
 160 );
 161
 162 my $conf = which_conf(".get_maintainer.conf");
 163 if (-f $conf) {
 164     my @conf_args;
 165     open(my $conffile, '<', "$conf")
 166         or warn "$P: Can't find a readable .get_maintainer.conf file $!\n";
 167
 168     while (<$conffile>) {
 169         my $line = $_;
 170
 171         $line =~ s/\s*\n?$//g;
 172         $line =~ s/^\s*//g;
 173         $line =~ s/\s+/ /g;
 174
 175         next if ($line =~ m/^\s*#/);
 176         next if ($line =~ m/^\s*$/);
 177
 178         my @words = split(" ", $line);
 179         foreach my $word (@words) {
 180             last if ($word =~ m/^#/);
 181             push (@conf_args, $word);
 182         }
 183     }
 184     close($conffile);
 185     unshift(@ARGV, @conf_args) if @conf_args;
 186 }
 187
 188 if (!GetOptions(
 189                 'email!' => \$email,
 190                 'git!' => \$email_git,
 191                 'git-all-signature-types!' => \$email_git_all_signature_types,
 192                 'git-blame!' => \$email_git_blame,
 193                 'git-blame-signatures!' => \$email_git_blame_signatures,
 194                 'git-fallback!' => \$email_git_fallback,
 195                 'git-chief-penguins!' => \$email_git_penguin_chiefs,
 196                 'git-min-signatures=i' => \$email_git_min_signatures,
 197                 'git-max-maintainers=i' => \$email_git_max_maintainers,
 198                 'git-min-percent=i' => \$email_git_min_percent,
 199                 'git-since=s' => \$email_git_since,
 200                 'hg-since=s' => \$email_hg_since,
 201                 'i|interactive!' => \$interactive,
 202                 'remove-duplicates!' => \$email_remove_duplicates,
 203                 'mailmap!' => \$email_use_mailmap,
 204                 'm!' => \$email_maintainer,
 205                 'n!' => \$email_usename,
 206                 'l!' => \$email_list,
 207                 's!' => \$email_subscriber_list,
 208                 'multiline!' => \$output_multiline,
 209                 'roles!' => \$output_roles,
 210                 'rolestats!' => \$output_rolestats,
 211                 'separator=s' => \$output_separator,
 212                 'subsystem!' => \$subsystem,
 213                 'status!' => \$status,
 214                 'scm!' => \$scm,
 215                 'web!' => \$web,
 216                 'pattern-depth=i' => \$pattern_depth,
 217                 'k|keywords!' => \$keywords,
 218                 'sections!' => \$sections,
 219                 'fe|file-emails!' => \$file_emails,
 220                 'f|file' => \$from_filename,
 221                 'v|version' => \$version,
 222                 'h|help|usage' => \$help,
 223                 )) {
 224     die "$P: invalid argument - use --help if necessary\n";
 225 }
 226
 227 if ($help != 0) {
 228     usage();
 229     exit 0;
 230 }
 231
 232 if ($version != 0) {
 233     print("${P} ${V}\n");
 234     exit 0;
 235 }
 236
 237 if (-t STDIN && !@ARGV) {
 238     # We're talking to a terminal, but have no command line arguments.
 239     die "$P: missing patchfile or -f file - use --help if necessary\n";
 240 }
 241
 242 $output_multiline = 0 if ($output_separator ne ", ");
 243 $output_rolestats = 1 if ($interactive);
 244 $output_roles = 1 if ($output_rolestats);
 245
 246 if ($sections) {
 247     $email = 0;
 248     $email_list = 0;
 249     $scm = 0;
 250     $status = 0;
 251     $subsystem = 0;
 252     $web = 0;
 253     $keywords = 0;
 254     $interactive = 0;
 255 } else {
 256     my $selections = $email + $scm + $status + $subsystem + $web;
 257     if ($selections == 0) {
 258         die "$P:  Missing required option: email, scm, status, subsystem or web\n";
 259     }
 260 }
 261
 262 if ($email &&
 263     ($email_maintainer + $email_list + $email_subscriber_list +
 264      $email_git + $email_git_penguin_chiefs + $email_git_blame) == 0) {
 265     die "$P: Please select at least 1 email option\n";
 266 }
 267
 268 if (!top_of_kernel_tree($lk_path)) {
 269     die "$P: The current directory does not appear to be "
 270         . "a linux kernel source tree.\n";
 271 }
 272
 273 ## Read MAINTAINERS for type/value pairs
 274
 275 my @typevalue = ();
 276 my %keyword_hash;
 277
 278 open (my $maint, '<', "${lk_path}MAINTAINERS")
 279     or die "$P: Can't open MAINTAINERS: $!\n";
 280 while (<$maint>) {
 281     my $line = $_;
 282
 283     if ($line =~ m/^(\C):\s*(.*)/) {
 284         my $type = $1;
 285         my $value = $2;
 286
 287         ##Filename pattern matching
 288         if ($type eq "F" || $type eq "X") {
 289             $value =~ s@\.@\\\.@g;       ##Convert . to \.
 290             $value =~ s/\*/\.\*/g;       ##Convert * to .*
 291             $value =~ s/\?/\./g;         ##Convert ? to .
 292             ##if pattern is a directory and it lacks a trailing slash, add one
 293             if ((-d $value)) {
 294                 $value =~ s@([^/])$@$1/@;
 295             }
 296         } elsif ($type eq "K") {
 297             $keyword_hash{@typevalue} = $value;
 298         }
 299         push(@typevalue, "$type:$value");
 300     } elsif (!/^(\s)*$/) {
 301         $line =~ s/\n$//g;
 302         push(@typevalue, $line);
 303     }
 304 }
 305 close($maint);
 306
 307
 308 #
 309 # Read mail address map
 310 #
 311
 312 my $mailmap;
 313
 314 read_mailmap();
 315
 316 sub read_mailmap {
 317     $mailmap = {
 318         names => {},
 319         addresses => {}
 320     };
 321
 322     return if (!$email_use_mailmap || !(-f "${lk_path}.mailmap"));
 323
 324     open(my $mailmap_file, '<', "${lk_path}.mailmap")
 325         or warn "$P: Can't open .mailmap: $!\n";
 326
 327     while (<$mailmap_file>) {
 328         s/#.*$//; #strip comments
 329         s/^\s+|\s+$//g; #trim
 330
 331         next if (/^\s*$/); #skip empty lines
 332         #entries have one of the following formats:
 333         # name1 <mail1>
 334         # <mail1> <mail2>
 335         # name1 <mail1> <mail2>
 336         # name1 <mail1> name2 <mail2>
 337         # (see man git-shortlog)
 338
 339         if (/^([^<]+)<([^>]+)>$/) {
 340             my $real_name = $1;
 341             my $address = $2;
 342
 343             $real_name =~ s/\s+$//;
 344             ($real_name, $address) = parse_email("$real_name <$address>");
 345             $mailmap->{names}->{$address} = $real_name;
 346
 347         } elsif (/^<([^>]+)>\s*<([^>]+)>$/) {
 348             my $real_address = $1;
 349             my $wrong_address = $2;
 350
 351             $mailmap->{addresses}->{$wrong_address} = $real_address;
 352
 353         } elsif (/^(.+)<([^>]+)>\s*<([^>]+)>$/) {
 354             my $real_name = $1;
 355             my $real_address = $2;
 356             my $wrong_address = $3;
 357
 358             $real_name =~ s/\s+$//;
 359             ($real_name, $real_address) =
 360                 parse_email("$real_name <$real_address>");
 361             $mailmap->{names}->{$wrong_address} = $real_name;
 362             $mailmap->{addresses}->{$wrong_address} = $real_address;
 363
 364         } elsif (/^(.+)<([^>]+)>\s*(.+)\s*<([^>]+)>$/) {
 365             my $real_name = $1;
 366             my $real_address = $2;
 367             my $wrong_name = $3;
 368             my $wrong_address = $4;
 369
 370             $real_name =~ s/\s+$//;
 371             ($real_name, $real_address) =
 372                 parse_email("$real_name <$real_address>");
 373
 374             $wrong_name =~ s/\s+$//;
 375             ($wrong_name, $wrong_address) =
 376                 parse_email("$wrong_name <$wrong_address>");
 377
 378             my $wrong_email = format_email($wrong_name, $wrong_address, 1);
 379             $mailmap->{names}->{$wrong_email} = $real_name;
 380             $mailmap->{addresses}->{$wrong_email} = $real_address;
 381         }
 382     }
 383     close($mailmap_file);
 384 }
 385
 386 ## use the filenames on the command line or find the filenames in the patchfiles
 387
 388 my @files = ();
 389 my @range = ();
 390 my @keyword_tvi = ();
 391 my @file_emails = ();
 392
 393 if (!@ARGV) {
 394     push(@ARGV, "&STDIN");
 395 }
 396
 397 foreach my $file (@ARGV) {
 398     if ($file ne "&STDIN") {
 399         ##if $file is a directory and it lacks a trailing slash, add one
 400         if ((-d $file)) {
 401             $file =~ s@([^/])$@$1/@;
 402         } elsif (!(-f $file)) {
 403             die "$P: file '${file}' not found\n";
 404         }
 405     }
 406     if ($from_filename) {
 407         push(@files, $file);
 408         if ($file ne "MAINTAINERS" && -f $file && ($keywords || $file_emails)) {
 409             open(my $f, '<', $file)
 410                 or die "$P: Can't open $file: $!\n";
 411             my $text = do { local($/) ; <$f> };
 412             close($f);
 413             if ($keywords) {
 414                 foreach my $line (keys %keyword_hash) {
 415                     if ($text =~ m/$keyword_hash{$line}/x) {
 416                         push(@keyword_tvi, $line);
 417                     }
 418                 }
 419             }
 420             if ($file_emails) {
 421                 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;
 422                 push(@file_emails, clean_file_emails(@poss_addr));
 423             }
 424         }
 425     } else {
 426         my $file_cnt = @files;
 427         my $lastfile;
 428
 429         open(my $patch, "< $file")
 430             or die "$P: Can't open $file: $!\n";
 431
 432         # We can check arbitrary information before the patch
 433         # like the commit message, mail headers, etc...
 434         # This allows us to match arbitrary keywords against any part
 435         # of a git format-patch generated file (subject tags, etc...)
 436
 437         my $patch_prefix = "";                  #Parsing the intro
 438
 439         while (<$patch>) {
 440             my $patch_line = $_;
 441             if (m/^\+\+\+\s+(\S+)/ or m/^---\s+(\S+)/) {
 442                 my $filename = $1;
 443                 $filename =~ s@^[^/]*/@@;
 444                 $filename =~ s@\n@@;
 445                 $lastfile = $filename;
 446                 push(@files, $filename);
 447                 $patch_prefix = "^[+-].*";      #Now parsing the actual patch
 448             } elsif (m/^\@\@ -(\d+),(\d+)/) {
 449                 if ($email_git_blame) {
 450                     push(@range, "$lastfile:$1:$2");
 451                 }
 452             } elsif ($keywords) {
 453                 foreach my $line (keys %keyword_hash) {
 454                     if ($patch_line =~ m/${patch_prefix}$keyword_hash{$line}/x) {
 455                         push(@keyword_tvi, $line);
 456                     }
 457                 }
 458             }
 459         }
 460         close($patch);
 461
 462         if ($file_cnt == @files) {
 463             warn "$P: file '${file}' doesn't appear to be a patch.  "
 464                 . "Add -f to options?\n";
 465         }
 466         @files = sort_and_uniq(@files);
 467     }
 468 }
 469
 470 @file_emails = uniq(@file_emails);
 471
 472 my %email_hash_name;
 473 my %email_hash_address;
 474 my @email_to = ();
 475 my %hash_list_to;
 476 my @list_to = ();
 477 my @scm = ();
 478 my @web = ();
 479 my @subsystem = ();
 480 my @status = ();
 481 my %deduplicate_name_hash = ();
 482 my %deduplicate_address_hash = ();
 483
 484 my @maintainers = get_maintainers();
 485
 486 if (@maintainers) {
 487     @maintainers = merge_email(@maintainers);
 488     output(@maintainers);
 489 }
 490
 491 if ($scm) {
 492     @scm = uniq(@scm);
 493     output(@scm);
 494 }
 495
 496 if ($status) {
 497     @status = uniq(@status);
 498     output(@status);
 499 }
 500
 501 if ($subsystem) {
 502     @subsystem = uniq(@subsystem);
 503     output(@subsystem);
 504 }
 505
 506 if ($web) {
 507     @web = uniq(@web);
 508     output(@web);
 509 }
 510
 511 exit($exit);
 512
 513 sub range_is_maintained {
 514     my ($start, $end) = @_;
 515
 516     for (my $i = $start; $i < $end; $i++) {
 517         my $line = $typevalue[$i];
 518         if ($line =~ m/^(\C):\s*(.*)/) {
 519             my $type = $1;
 520             my $value = $2;
 521             if ($type eq 'S') {
 522                 if ($value =~ /(maintain|support)/i) {
 523                     return 1;
 524                 }
 525             }
 526         }
 527     }
 528     return 0;
 529 }
 530
 531 sub range_has_maintainer {
 532     my ($start, $end) = @_;
 533
 534     for (my $i = $start; $i < $end; $i++) {
 535         my $line = $typevalue[$i];
 536         if ($line =~ m/^(\C):\s*(.*)/) {
 537             my $type = $1;
 538             my $value = $2;
 539             if ($type eq 'M') {
 540                 return 1;
 541             }
 542         }
 543     }
 544     return 0;
 545 }
 546
 547 sub get_maintainers {
 548     %email_hash_name = ();
 549     %email_hash_address = ();
 550     %commit_author_hash = ();
 551     %commit_signer_hash = ();
 552     @email_to = ();
 553     %hash_list_to = ();
 554     @list_to = ();
 555     @scm = ();
 556     @web = ();
 557     @subsystem = ();
 558     @status = ();
 559     %deduplicate_name_hash = ();
 560     %deduplicate_address_hash = ();
 561     if ($email_git_all_signature_types) {
 562         $signature_pattern = "(.+?)[Bb][Yy]:";
 563     } else {
 564         $signature_pattern = "\(" . join("|", @signature_tags) . "\)";
 565     }
 566
 567     # Find responsible parties
 568
 569     my %exact_pattern_match_hash = ();
 570
 571     foreach my $file (@files) {
 572
 573         my %hash;
 574         my $tvi = find_first_section();
 575         while ($tvi < @typevalue) {
 576             my $start = find_starting_index($tvi);
 577             my $end = find_ending_index($tvi);
 578             my $exclude = 0;
 579             my $i;
 580
 581             #Do not match excluded file patterns
 582
 583             for ($i = $start; $i < $end; $i++) {
 584                 my $line = $typevalue[$i];
 585                 if ($line =~ m/^(\C):\s*(.*)/) {
 586                     my $type = $1;
 587                     my $value = $2;
 588                     if ($type eq 'X') {
 589                         if (file_match_pattern($file, $value)) {
 590                             $exclude = 1;
 591                             last;
 592                         }
 593                     }
 594                 }
 595             }
 596
 597             if (!$exclude) {
 598                 for ($i = $start; $i < $end; $i++) {
 599                     my $line = $typevalue[$i];
 600                     if ($line =~ m/^(\C):\s*(.*)/) {
 601                         my $type = $1;
 602                         my $value = $2;
 603                         if ($type eq 'F') {
 604                             if (file_match_pattern($file, $value)) {
 605                                 my $value_pd = ($value =~ tr@/@@);
 606                                 my $file_pd = ($file  =~ tr@/@@);
 607                                 $value_pd++ if (substr($value,-1,1) ne "/");
 608                                 $value_pd = -1 if ($value =~ /^\.\*/);
 609                                 if ($value_pd >= $file_pd &&
 610                                     range_is_maintained($start, $end) &&
 611                                     range_has_maintainer($start, $end)) {
 612                                     $exact_pattern_match_hash{$file} = 1;
 613                                 }
 614                                 if ($pattern_depth == 0 ||
 615                                     (($file_pd - $value_pd) < $pattern_depth)) {
 616                                     $hash{$tvi} = $value_pd;
 617                                 }
 618                             }
 619                         } elsif ($type eq 'N') {
 620                             if ($file =~ m/$value/x) {
 621                                 $hash{$tvi} = 0;
 622                             }
 623                         }
 624                     }
 625                 }
 626             }
 627             $tvi = $end + 1;
 628         }
 629
 630         foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
 631             add_categories($line);
 632             if ($sections) {
 633                 my $i;
 634                 my $start = find_starting_index($line);
 635                 my $end = find_ending_index($line);
 636                 for ($i = $start; $i < $end; $i++) {
 637                     my $line = $typevalue[$i];
 638                     if ($line =~ /^[FX]:/) {            ##Restore file patterns
 639                         $line =~ s/([^\\])\.([^\*])/$1\?$2/g;
 640                         $line =~ s/([^\\])\.$/$1\?/g;   ##Convert . back to ?
 641                         $line =~ s/\\\./\./g;           ##Convert \. to .
 642                         $line =~ s/\.\*/\*/g;           ##Convert .* to *
 643                     }
 644                     $line =~ s/^([A-Z]):/$1:\t/g;
 645                     print("$line\n");
 646                 }
 647                 print("\n");
 648             }
 649         }
 650     }
 651
 652     if ($keywords) {
 653         @keyword_tvi = sort_and_uniq(@keyword_tvi);
 654         foreach my $line (@keyword_tvi) {
 655             add_categories($line);
 656         }
 657     }
 658
 659     foreach my $email (@email_to, @list_to) {
 660         $email->[0] = deduplicate_email($email->[0]);
 661     }
 662
 663     foreach my $file (@files) {
 664         if ($email &&
 665             ($email_git || ($email_git_fallback &&
 666                             !$exact_pattern_match_hash{$file}))) {
 667             vcs_file_signoffs($file);
 668         }
 669         if ($email && $email_git_blame) {
 670             vcs_file_blame($file);
 671         }
 672     }
 673
 674     if ($email) {
 675         foreach my $chief (@penguin_chief) {
 676             if ($chief =~ m/^(.*):(.*)/) {
 677                 my $email_address;
 678
 679                 $email_address = format_email($1, $2, $email_usename);
 680                 if ($email_git_penguin_chiefs) {
 681                     push(@email_to, [$email_address, 'chief penguin']);
 682                 } else {
 683                     @email_to = grep($_->[0] !~ /${email_address}/, @email_to);
 684                 }
 685             }
 686         }
 687
 688         foreach my $email (@file_emails) {
 689             my ($name, $address) = parse_email($email);
 690
 691             my $tmp_email = format_email($name, $address, $email_usename);
 692             push_email_address($tmp_email, '');
 693             add_role($tmp_email, 'in file');
 694         }
 695     }
 696
 697     my @to = ();
 698     if ($email || $email_list) {
 699         if ($email) {
 700             @to = (@to, @email_to);
 701         }
 702         if ($email_list) {
 703             @to = (@to, @list_to);
 704         }
 705     }
 706
 707     if ($interactive) {
 708         @to = interactive_get_maintainers(\@to);
 709     }
 710
 711     return @to;
 712 }
 713
 714 sub file_match_pattern {
 715     my ($file, $pattern) = @_;
 716     if (substr($pattern, -1) eq "/") {
 717         if ($file =~ m@^$pattern@) {
 718             return 1;
 719         }
 720     } else {
 721         if ($file =~ m@^$pattern@) {
 722             my $s1 = ($file =~ tr@/@@);
 723             my $s2 = ($pattern =~ tr@/@@);
 724             if ($s1 == $s2) {
 725                 return 1;
 726             }
 727         }
 728     }
 729     return 0;
 730 }
 731
 732 sub usage {
 733     print <<EOT;
 734 usage: $P [options] patchfile
 735        $P [options] -f file|directory
 736 version: $V
 737
 738 MAINTAINER field selection options:
 739   --email => print email address(es) if any
 740     --git => include recent git \*-by: signers
 741     --git-all-signature-types => include signers regardless of signature type
 742         or use only ${signature_pattern} signers (default: $email_git_all_signature_types)
 743     --git-fallback => use git when no exact MAINTAINERS pattern (default: $email_git_fallback)
 744     --git-chief-penguins => include ${penguin_chiefs}
 745     --git-min-signatures => number of signatures required (default: $email_git_min_signatures)
 746     --git-max-maintainers => maximum maintainers to add (default: $email_git_max_maintainers)
 747     --git-min-percent => minimum percentage of commits required (default: $email_git_min_percent)
 748     --git-blame => use git blame to find modified commits for patch or file
 749     --git-since => git history to use (default: $email_git_since)
 750     --hg-since => hg history to use (default: $email_hg_since)
 751     --interactive => display a menu (mostly useful if used with the --git option)
 752     --m => include maintainer(s) if any
 753     --n => include name 'Full Name <addr\@domain.tld>'
 754     --l => include list(s) if any
 755     --s => include subscriber only list(s) if any
 756     --remove-duplicates => minimize duplicate email names/addresses
 757     --roles => show roles (status:subsystem, git-signer, list, etc...)
 758     --rolestats => show roles and statistics (commits/total_commits, %)
 759     --file-emails => add email addresses found in -f file (default: 0 (off))
 760   --scm => print SCM tree(s) if any
 761   --status => print status if any
 762   --subsystem => print subsystem name if any
 763   --web => print website(s) if any
 764
 765 Output type options:
 766   --separator [, ] => separator for multiple entries on 1 line
 767     using --separator also sets --nomultiline if --separator is not [, ]
 768   --multiline => print 1 entry per line
 769
 770 Other options:
 771   --pattern-depth => Number of pattern directory traversals (default: 0 (all))
 772   --keywords => scan patch for keywords (default: $keywords)
 773   --sections => print all of the subsystem sections with pattern matches
 774   --mailmap => use .mailmap file (default: $email_use_mailmap)
 775   --version => show version
 776   --help => show this help information
 777
 778 Default options:
 779   [--email --nogit --git-fallback --m --n --l --multiline -pattern-depth=0
 780    --remove-duplicates --rolestats]
 781
 782 Notes:
 783   Using "-f directory" may give unexpected results:
 784       Used with "--git", git signators for _all_ files in and below
 785           directory are examined as git recurses directories.
 786           Any specified X: (exclude) pattern matches are _not_ ignored.
 787       Used with "--nogit", directory is used as a pattern match,
 788           no individual file within the directory or subdirectory
 789           is matched.
 790       Used with "--git-blame", does not iterate all files in directory
 791   Using "--git-blame" is slow and may add old committers and authors
 792       that are no longer active maintainers to the output.
 793   Using "--roles" or "--rolestats" with git send-email --cc-cmd or any
 794       other automated tools that expect only ["name"] <email address>
 795       may not work because of additional output after <email address>.
 796   Using "--rolestats" and "--git-blame" shows the #/total=% commits,
 797       not the percentage of the entire file authored.  # of commits is
 798       not a good measure of amount of code authored.  1 major commit may
 799       contain a thousand lines, 5 trivial commits may modify a single line.
 800   If git is not installed, but mercurial (hg) is installed and an .hg
 801       repository exists, the following options apply to mercurial:
 802           --git,
 803           --git-min-signatures, --git-max-maintainers, --git-min-percent, and
 804           --git-blame
 805       Use --hg-since not --git-since to control date selection
 806   File ".get_maintainer.conf", if it exists in the linux kernel source root
 807       directory, can change whatever get_maintainer defaults are desired.
 808       Entries in this file can be any command line argument.
 809       This file is prepended to any additional command line arguments.
 810       Multiple lines and # comments are allowed.
 811 EOT
 812 }
 813
 814 sub top_of_kernel_tree {
 815     my ($lk_path) = @_;
 816
 817     if ($lk_path ne "" && substr($lk_path,length($lk_path)-1,1) ne "/") {
 818         $lk_path .= "/";
 819     }
 820     if (   (-f "${lk_path}COPYING")
 821         && (-f "${lk_path}CREDITS")
 822         && (-f "${lk_path}Kbuild")
 823         && (-f "${lk_path}MAINTAINERS")
 824         && (-f "${lk_path}Makefile")
 825         && (-f "${lk_path}README")
 826         && (-d "${lk_path}Documentation")
 827         && (-d "${lk_path}arch")
 828         && (-d "${lk_path}include")
 829         && (-d "${lk_path}drivers")
 830         && (-d "${lk_path}fs")
 831         && (-d "${lk_path}init")
 832         && (-d "${lk_path}ipc")
 833         && (-d "${lk_path}kernel")
 834         && (-d "${lk_path}lib")
 835         && (-d "${lk_path}scripts")) {
 836         return 1;
 837     }
 838     return 0;
 839 }
 840
 841 sub parse_email {
 842     my ($formatted_email) = @_;
 843
 844     my $name = "";
 845     my $address = "";
 846
 847     if ($formatted_email =~ /^([^<]+)<(.+\@.*)>.*$/) {
 848         $name = $1;
 849         $address = $2;
 850     } elsif ($formatted_email =~ /^\s*<(.+\@\S*)>.*$/) {
 851         $address = $1;
 852     } elsif ($formatted_email =~ /^(.+\@\S*).*$/) {
 853         $address = $1;
 854     }
 855
 856     $name =~ s/^\s+|\s+$//g;
 857     $name =~ s/^\"|\"$//g;
 858     $address =~ s/^\s+|\s+$//g;
 859
 860     if ($name =~ /[^\w \-]/i) {          ##has "must quote" chars
 861         $name =~ s/(?<!\\)"/\\"/g;       ##escape quotes
 862         $name = "\"$name\"";
 863     }
 864
 865     return ($name, $address);
 866 }
 867
 868 sub format_email {
 869     my ($name, $address, $usename) = @_;
 870
 871     my $formatted_email;
 872
 873     $name =~ s/^\s+|\s+$//g;
 874     $name =~ s/^\"|\"$//g;
 875     $address =~ s/^\s+|\s+$//g;
 876
 877     if ($name =~ /[^\w \-]/i) {          ##has "must quote" chars
 878         $name =~ s/(?<!\\)"/\\"/g;       ##escape quotes
 879         $name = "\"$name\"";
 880     }
 881
 882     if ($usename) {
 883         if ("$name" eq "") {
 884             $formatted_email = "$address";
 885         } else {
 886             $formatted_email = "$name <$address>";
 887         }
 888     } else {
 889         $formatted_email = $address;
 890     }
 891
 892     return $formatted_email;
 893 }
 894
 895 sub find_first_section {
 896     my $index = 0;
 897
 898     while ($index < @typevalue) {
 899         my $tv = $typevalue[$index];
 900         if (($tv =~ m/^(\C):\s*(.*)/)) {
 901             last;
 902         }
 903         $index++;
 904     }
 905
 906     return $index;
 907 }
 908
 909 sub find_starting_index {
 910     my ($index) = @_;
 911
 912     while ($index > 0) {
 913         my $tv = $typevalue[$index];
 914         if (!($tv =~ m/^(\C):\s*(.*)/)) {
 915             last;
 916         }
 917         $index--;
 918     }
 919
 920     return $index;
 921 }
 922
 923 sub find_ending_index {
 924     my ($index) = @_;
 925
 926     while ($index < @typevalue) {
 927         my $tv = $typevalue[$index];
 928         if (!($tv =~ m/^(\C):\s*(.*)/)) {
 929             last;
 930         }
 931         $index++;
 932     }
 933
 934     return $index;
 935 }
 936
 937 sub get_maintainer_role {
 938     my ($index) = @_;
 939
 940     my $i;
 941     my $start = find_starting_index($index);
 942     my $end = find_ending_index($index);
 943
 944     my $role = "unknown";
 945     my $subsystem = $typevalue[$start];
 946     if (length($subsystem) > 20) {
 947         $subsystem = substr($subsystem, 0, 17);
 948         $subsystem =~ s/\s*$//;
 949         $subsystem = $subsystem . "...";
 950     }
 951
 952     for ($i = $start + 1; $i < $end; $i++) {
 953         my $tv = $typevalue[$i];
 954         if ($tv =~ m/^(\C):\s*(.*)/) {
 955             my $ptype = $1;
 956             my $pvalue = $2;
 957             if ($ptype eq "S") {
 958                 $role = $pvalue;
 959             }
 960         }
 961     }
 962
 963     $role = lc($role);
 964     if      ($role eq "supported") {
 965         $role = "supporter";
 966     } elsif ($role eq "maintained") {
 967         $role = "maintainer";
 968     } elsif ($role eq "odd fixes") {
 969         $role = "odd fixer";
 970     } elsif ($role eq "orphan") {
 971         $role = "orphan minder";
 972     } elsif ($role eq "obsolete") {
 973         $role = "obsolete minder";
 974     } elsif ($role eq "buried alive in reporters") {
 975         $role = "chief penguin";
 976     }
 977
 978     return $role . ":" . $subsystem;
 979 }
 980
 981 sub get_list_role {
 982     my ($index) = @_;
 983
 984     my $i;
 985     my $start = find_starting_index($index);
 986     my $end = find_ending_index($index);
 987
 988     my $subsystem = $typevalue[$start];
 989     if (length($subsystem) > 20) {
 990         $subsystem = substr($subsystem, 0, 17);
 991         $subsystem =~ s/\s*$//;
 992         $subsystem = $subsystem . "...";
 993     }
 994
 995     if ($subsystem eq "THE REST") {
 996         $subsystem = "";
 997     }
 998
 999     return $subsystem;
1000 }
1001
1002 sub add_categories {
1003     my ($index) = @_;
1004
1005     my $i;
1006     my $start = find_starting_index($index);
1007     my $end = find_ending_index($index);
1008
1009     push(@subsystem, $typevalue[$start]);
1010
1011     for ($i = $start + 1; $i < $end; $i++) {
1012         my $tv = $typevalue[$i];
1013         if ($tv =~ m/^(\C):\s*(.*)/) {
1014             my $ptype = $1;
1015             my $pvalue = $2;
1016             if ($ptype eq "L") {
1017                 my $list_address = $pvalue;
1018                 my $list_additional = "";
1019                 my $list_role = get_list_role($i);
1020
1021                 if ($list_role ne "") {
1022                     $list_role = ":" . $list_role;
1023                 }
1024                 if ($list_address =~ m/([^\s]+)\s+(.*)$/) {
1025                     $list_address = $1;
1026                     $list_additional = $2;
1027                 }
1028                 if ($list_additional =~ m/subscribers-only/) {
1029                     if ($email_subscriber_list) {
1030                         if (!$hash_list_to{lc($list_address)}) {
1031                             $hash_list_to{lc($list_address)} = 1;
1032                             push(@list_to, [$list_address,
1033                                             "subscriber list${list_role}"]);
1034                         }
1035                     }
1036                 } else {
1037                     if ($email_list) {
1038                         if (!$hash_list_to{lc($list_address)}) {
1039                             $hash_list_to{lc($list_address)} = 1;
1040                             if ($list_additional =~ m/moderated/) {
1041                                 push(@list_to, [$list_address,
1042                                                 "moderated list${list_role}"]);
1043                             } else {
1044                                 push(@list_to, [$list_address,
1045                                                 "open list${list_role}"]);
1046                             }
1047                         }
1048                     }
1049                 }
1050             } elsif ($ptype eq "M") {
1051                 my ($name, $address) = parse_email($pvalue);
1052                 if ($name eq "") {
1053                     if ($i > 0) {
1054                         my $tv = $typevalue[$i - 1];
1055                         if ($tv =~ m/^(\C):\s*(.*)/) {
1056                             if ($1 eq "P") {
1057                                 $name = $2;
1058                                 $pvalue = format_email($name, $address, $email_usename);
1059                             }
1060                         }
1061                     }
1062                 }
1063                 if ($email_maintainer) {
1064                     my $role = get_maintainer_role($i);
1065                     push_email_addresses($pvalue, $role);
1066                 }
1067             } elsif ($ptype eq "T") {
1068                 push(@scm, $pvalue);
1069             } elsif ($ptype eq "W") {
1070                 push(@web, $pvalue);
1071             } elsif ($ptype eq "S") {
1072                 push(@status, $pvalue);
1073             }
1074         }
1075     }
1076 }
1077
1078 sub email_inuse {
1079     my ($name, $address) = @_;
1080
1081     return 1 if (($name eq "") && ($address eq ""));
1082     return 1 if (($name ne "") && exists($email_hash_name{lc($name)}));
1083     return 1 if (($address ne "") && exists($email_hash_address{lc($address)}));
1084
1085     return 0;
1086 }
1087
1088 sub push_email_address {
1089     my ($line, $role) = @_;
1090
1091     my ($name, $address) = parse_email($line);
1092
1093     if ($address eq "") {
1094         return 0;
1095     }
1096
1097     if (!$email_remove_duplicates) {
1098         push(@email_to, [format_email($name, $address, $email_usename), $role]);
1099     } elsif (!email_inuse($name, $address)) {
1100         push(@email_to, [format_email($name, $address, $email_usename), $role]);
1101         $email_hash_name{lc($name)}++ if ($name ne "");
1102         $email_hash_address{lc($address)}++;
1103     }
1104
1105     return 1;
1106 }
1107
1108 sub push_email_addresses {
1109     my ($address, $role) = @_;
1110
1111     my @address_list = ();
1112
1113     if (rfc822_valid($address)) {
1114         push_email_address($address, $role);
1115     } elsif (@address_list = rfc822_validlist($address)) {
1116         my $array_count = shift(@address_list);
1117         while (my $entry = shift(@address_list)) {
1118             push_email_address($entry, $role);
1119         }
1120     } else {
1121         if (!push_email_address($address, $role)) {
1122             warn("Invalid MAINTAINERS address: '" . $address . "'\n");
1123         }
1124     }
1125 }
1126
1127 sub add_role {
1128     my ($line, $role) = @_;
1129
1130     my ($name, $address) = parse_email($line);
1131     my $email = format_email($name, $address, $email_usename);
1132
1133     foreach my $entry (@email_to) {
1134         if ($email_remove_duplicates) {
1135             my ($entry_name, $entry_address) = parse_email($entry->[0]);
1136             if (($name eq $entry_name || $address eq $entry_address)
1137                 && ($role eq "" || !($entry->[1] =~ m/$role/))
1138             ) {
1139                 if ($entry->[1] eq "") {
1140                     $entry->[1] = "$role";
1141                 } else {
1142                     $entry->[1] = "$entry->[1],$role";
1143                 }
1144             }
1145         } else {
1146             if ($email eq $entry->[0]
1147                 && ($role eq "" || !($entry->[1] =~ m/$role/))
1148             ) {
1149                 if ($entry->[1] eq "") {
1150                     $entry->[1] = "$role";
1151                 } else {
1152                     $entry->[1] = "$entry->[1],$role";
1153                 }
1154             }
1155         }
1156     }
1157 }
1158
1159 sub which {
1160     my ($bin) = @_;
1161
1162     foreach my $path (split(/:/, $ENV{PATH})) {
1163         if (-e "$path/$bin") {
1164             return "$path/$bin";
1165         }
1166     }
1167
1168     return "";
1169 }
1170
1171 sub which_conf {
1172     my ($conf) = @_;
1173
1174     foreach my $path (split(/:/, ".:$ENV{HOME}:.scripts")) {
1175         if (-e "$path/$conf") {
1176             return "$path/$conf";
1177         }
1178     }
1179
1180     return "";
1181 }
1182
1183 sub mailmap_email {
1184     my ($line) = @_;
1185
1186     my ($name, $address) = parse_email($line);
1187     my $email = format_email($name, $address, 1);
1188     my $real_name = $name;
1189     my $real_address = $address;
1190
1191     if (exists $mailmap->{names}->{$email} ||
1192         exists $mailmap->{addresses}->{$email}) {
1193         if (exists $mailmap->{names}->{$email}) {
1194             $real_name = $mailmap->{names}->{$email};
1195         }
1196         if (exists $mailmap->{addresses}->{$email}) {
1197             $real_address = $mailmap->{addresses}->{$email};
1198         }
1199     } else {
1200         if (exists $mailmap->{names}->{$address}) {
1201             $real_name = $mailmap->{names}->{$address};
1202         }
1203         if (exists $mailmap->{addresses}->{$address}) {
1204             $real_address = $mailmap->{addresses}->{$address};
1205         }
1206     }
1207     return format_email($real_name, $real_address, 1);
1208 }
1209
1210 sub mailmap {
1211     my (@addresses) = @_;
1212
1213     my @mapped_emails = ();
1214     foreach my $line (@addresses) {
1215         push(@mapped_emails, mailmap_email($line));
1216     }
1217     merge_by_realname(@mapped_emails) if ($email_use_mailmap);
1218     return @mapped_emails;
1219 }
1220
1221 sub merge_by_realname {
1222     my %address_map;
1223     my (@emails) = @_;
1224
1225     foreach my $email (@emails) {
1226         my ($name, $address) = parse_email($email);
1227         if (exists $address_map{$name}) {
1228             $address = $address_map{$name};
1229             $email = format_email($name, $address, 1);
1230         } else {
1231             $address_map{$name} = $address;
1232         }
1233     }
1234 }
1235
1236 sub git_execute_cmd {
1237     my ($cmd) = @_;
1238     my @lines = ();
1239
1240     my $output = `$cmd`;
1241     $output =~ s/^\s*//gm;
1242     @lines = split("\n", $output);
1243
1244     return @lines;
1245 }
1246
1247 sub hg_execute_cmd {
1248     my ($cmd) = @_;
1249     my @lines = ();
1250
1251     my $output = `$cmd`;
1252     @lines = split("\n", $output);
1253
1254     return @lines;
1255 }
1256
1257 sub extract_formatted_signatures {
1258     my (@signature_lines) = @_;
1259
1260     my @type = @signature_lines;
1261
1262     s/\s*(.*):.*/$1/ for (@type);
1263
1264     # cut -f2- -d":"
1265     s/\s*.*:\s*(.+)\s*/$1/ for (@signature_lines);
1266
1267 ## Reformat email addresses (with names) to avoid badly written signatures
1268
1269     foreach my $signer (@signature_lines) {
1270         $signer = deduplicate_email($signer);
1271     }
1272
1273     return (\@type, \@signature_lines);
1274 }
1275
1276 sub vcs_find_signers {
1277     my ($cmd, $file) = @_;
1278     my $commits;
1279     my @lines = ();
1280     my @signatures = ();
1281     my @authors = ();
1282     my @stats = ();
1283
1284     @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
1285
1286     my $pattern = $VCS_cmds{"commit_pattern"};
1287     my $author_pattern = $VCS_cmds{"author_pattern"};
1288     my $stat_pattern = $VCS_cmds{"stat_pattern"};
1289
1290     $stat_pattern =~ s/(\$\w+)/$1/eeg;          #interpolate $stat_pattern
1291
1292     $commits = grep(/$pattern/, @lines);        # of commits
1293
1294     @authors = grep(/$author_pattern/, @lines);
1295     @signatures = grep(/^[ \t]*${signature_pattern}.*\@.*$/, @lines);
1296     @stats = grep(/$stat_pattern/, @lines);
1297
1298 #    print("stats: <@stats>\n");
1299
1300     return (0, \@signatures, \@authors, \@stats) if !@signatures;
1301
1302     save_commits_by_author(@lines) if ($interactive);
1303     save_commits_by_signer(@lines) if ($interactive);
1304
1305     if (!$email_git_penguin_chiefs) {
1306         @signatures = grep(!/${penguin_chiefs}/i, @signatures);
1307     }
1308
1309     my ($author_ref, $authors_ref) = extract_formatted_signatures(@authors);
1310     my ($types_ref, $signers_ref) = extract_formatted_signatures(@signatures);
1311
1312     return ($commits, $signers_ref, $authors_ref, \@stats);
1313 }
1314
1315 sub vcs_find_author {
1316     my ($cmd) = @_;
1317     my @lines = ();
1318
1319     @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
1320
1321     if (!$email_git_penguin_chiefs) {
1322         @lines = grep(!/${penguin_chiefs}/i, @lines);
1323     }
1324
1325     return @lines if !@lines;
1326
1327     my @authors = ();
1328     foreach my $line (@lines) {
1329         if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
1330             my $author = $1;
1331             my ($name, $address) = parse_email($author);
1332             $author = format_email($name, $address, 1);
1333             push(@authors, $author);
1334         }
1335     }
1336
1337     save_commits_by_author(@lines) if ($interactive);
1338     save_commits_by_signer(@lines) if ($interactive);
1339
1340     return @authors;
1341 }
1342
1343 sub vcs_save_commits {
1344     my ($cmd) = @_;
1345     my @lines = ();
1346     my @commits = ();
1347
1348     @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
1349
1350     foreach my $line (@lines) {
1351         if ($line =~ m/$VCS_cmds{"blame_commit_pattern"}/) {
1352             push(@commits, $1);
1353         }
1354     }
1355
1356     return @commits;
1357 }
1358
1359 sub vcs_blame {
1360     my ($file) = @_;
1361     my $cmd;
1362     my @commits = ();
1363
1364     return @commits if (!(-f $file));
1365
1366     if (@range && $VCS_cmds{"blame_range_cmd"} eq "") {
1367         my @all_commits = ();
1368
1369         $cmd = $VCS_cmds{"blame_file_cmd"};
1370         $cmd =~ s/(\$\w+)/$1/eeg;               #interpolate $cmd
1371         @all_commits = vcs_save_commits($cmd);
1372
1373         foreach my $file_range_diff (@range) {
1374             next if (!($file_range_diff =~ m/(.+):(.+):(.+)/));
1375             my $diff_file = $1;
1376             my $diff_start = $2;
1377             my $diff_length = $3;
1378             next if ("$file" ne "$diff_file");
1379             for (my $i = $diff_start; $i < $diff_start + $diff_length; $i++) {
1380                 push(@commits, $all_commits[$i]);
1381             }
1382         }
1383     } elsif (@range) {
1384         foreach my $file_range_diff (@range) {
1385             next if (!($file_range_diff =~ m/(.+):(.+):(.+)/));
1386             my $diff_file = $1;
1387             my $diff_start = $2;
1388             my $diff_length = $3;
1389             next if ("$file" ne "$diff_file");
1390             $cmd = $VCS_cmds{"blame_range_cmd"};
1391             $cmd =~ s/(\$\w+)/$1/eeg;           #interpolate $cmd
1392             push(@commits, vcs_save_commits($cmd));
1393         }
1394     } else {
1395         $cmd = $VCS_cmds{"blame_file_cmd"};
1396         $cmd =~ s/(\$\w+)/$1/eeg;               #interpolate $cmd
1397         @commits = vcs_save_commits($cmd);
1398     }
1399
1400     foreach my $commit (@commits) {
1401         $commit =~ s/^\^//g;
1402     }
1403
1404     return @commits;
1405 }
1406
1407 my $printed_novcs = 0;
1408 sub vcs_exists {
1409     %VCS_cmds = %VCS_cmds_git;
1410     return 1 if eval $VCS_cmds{"available"};
1411     %VCS_cmds = %VCS_cmds_hg;
1412     return 2 if eval $VCS_cmds{"available"};
1413     %VCS_cmds = ();
1414     if (!$printed_novcs) {
1415         warn("$P: No supported VCS found.  Add --nogit to options?\n");
1416         warn("Using a git repository produces better results.\n");
1417         warn("Try Linus Torvalds' latest git repository using:\n");
1418         warn("git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git\n");
1419         $printed_novcs = 1;
1420     }
1421     return 0;
1422 }
1423
1424 sub vcs_is_git {
1425     vcs_exists();
1426     return $vcs_used == 1;
1427 }
1428
1429 sub vcs_is_hg {
1430     return $vcs_used == 2;
1431 }
1432
1433 sub interactive_get_maintainers {
1434     my ($list_ref) = @_;
1435     my @list = @$list_ref;
1436
1437     vcs_exists();
1438
1439     my %selected;
1440     my %authored;
1441     my %signed;
1442     my $count = 0;
1443     my $maintained = 0;
1444     foreach my $entry (@list) {
1445         $maintained = 1 if ($entry->[1] =~ /^(maintainer|supporter)/i);
1446         $selected{$count} = 1;
1447         $authored{$count} = 0;
1448         $signed{$count} = 0;
1449         $count++;
1450     }
1451
1452     #menu loop
1453     my $done = 0;
1454     my $print_options = 0;
1455     my $redraw = 1;
1456     while (!$done) {
1457         $count = 0;
1458         if ($redraw) {
1459             printf STDERR "\n%1s %2s %-65s",
1460                           "*", "#", "email/list and role:stats";
1461             if ($email_git ||
1462                 ($email_git_fallback && !$maintained) ||
1463                 $email_git_blame) {
1464                 print STDERR "auth sign";
1465             }
1466             print STDERR "\n";
1467             foreach my $entry (@list) {
1468                 my $email = $entry->[0];
1469                 my $role = $entry->[1];
1470                 my $sel = "";
1471                 $sel = "*" if ($selected{$count});
1472                 my $commit_author = $commit_author_hash{$email};
1473                 my $commit_signer = $commit_signer_hash{$email};
1474                 my $authored = 0;
1475                 my $signed = 0;
1476                 $authored++ for (@{$commit_author});
1477                 $signed++ for (@{$commit_signer});
1478                 printf STDERR "%1s %2d %-65s", $sel, $count + 1, $email;
1479                 printf STDERR "%4d %4d", $authored, $signed
1480                     if ($authored > 0 || $signed > 0);
1481                 printf STDERR "\n     %s\n", $role;
1482                 if ($authored{$count}) {
1483                     my $commit_author = $commit_author_hash{$email};
1484                     foreach my $ref (@{$commit_author}) {
1485                         print STDERR "     Author: @{$ref}[1]\n";
1486                     }
1487                 }
1488                 if ($signed{$count}) {
1489                     my $commit_signer = $commit_signer_hash{$email};
1490                     foreach my $ref (@{$commit_signer}) {
1491                         print STDERR "     @{$ref}[2]: @{$ref}[1]\n";
1492                     }
1493                 }
1494
1495                 $count++;
1496             }
1497         }
1498         my $date_ref = \$email_git_since;
1499         $date_ref = \$email_hg_since if (vcs_is_hg());
1500         if ($print_options) {
1501             $print_options = 0;
1502             if (vcs_exists()) {
1503                 print STDERR <<EOT
1504
1505 Version Control options:
1506 g  use git history      [$email_git]
1507 gf use git-fallback     [$email_git_fallback]
1508 b  use git blame        [$email_git_blame]
1509 bs use blame signatures [$email_git_blame_signatures]
1510 c# minimum commits      [$email_git_min_signatures]
1511 %# min percent          [$email_git_min_percent]
1512 d# history to use       [$$date_ref]
1513 x# max maintainers      [$email_git_max_maintainers]
1514 t  all signature types  [$email_git_all_signature_types]
1515 m  use .mailmap         [$email_use_mailmap]
1516 EOT
1517             }
1518             print STDERR <<EOT
1519
1520 Additional options:
1521 0  toggle all
1522 tm toggle maintainers
1523 tg toggle git entries
1524 tl toggle open list entries
1525 ts toggle subscriber list entries
1526 f  emails in file       [$file_emails]
1527 k  keywords in file     [$keywords]
1528 r  remove duplicates    [$email_remove_duplicates]
1529 p# pattern match depth  [$pattern_depth]
1530 EOT
1531         }
1532         print STDERR
1533 "\n#(toggle), A#(author), S#(signed) *(all), ^(none), O(options), Y(approve): ";
1534
1535         my $input = <STDIN>;
1536         chomp($input);
1537
1538         $redraw = 1;
1539         my $rerun = 0;
1540         my @wish = split(/[, ]+/, $input);
1541         foreach my $nr (@wish) {
1542             $nr = lc($nr);
1543             my $sel = substr($nr, 0, 1);
1544             my $str = substr($nr, 1);
1545             my $val = 0;
1546             $val = $1 if $str =~ /^(\d+)$/;
1547
1548             if ($sel eq "y") {
1549                 $interactive = 0;
1550                 $done = 1;
1551                 $output_rolestats = 0;
1552                 $output_roles = 0;
1553                 last;
1554             } elsif ($nr =~ /^\d+$/ && $nr > 0 && $nr <= $count) {
1555                 $selected{$nr - 1} = !$selected{$nr - 1};
1556             } elsif ($sel eq "*" || $sel eq '^') {
1557                 my $toggle = 0;
1558                 $toggle = 1 if ($sel eq '*');
1559                 for (my $i = 0; $i < $count; $i++) {
1560                     $selected{$i} = $toggle;
1561                 }
1562             } elsif ($sel eq "0") {
1563                 for (my $i = 0; $i < $count; $i++) {
1564                     $selected{$i} = !$selected{$i};
1565                 }
1566             } elsif ($sel eq "t") {
1567                 if (lc($str) eq "m") {
1568                     for (my $i = 0; $i < $count; $i++) {
1569                         $selected{$i} = !$selected{$i}
1570                             if ($list[$i]->[1] =~ /^(maintainer|supporter)/i);
1571                     }
1572                 } elsif (lc($str) eq "g") {
1573                     for (my $i = 0; $i < $count; $i++) {
1574                         $selected{$i} = !$selected{$i}
1575                             if ($list[$i]->[1] =~ /^(author|commit|signer)/i);
1576                     }
1577                 } elsif (lc($str) eq "l") {
1578                     for (my $i = 0; $i < $count; $i++) {
1579                         $selected{$i} = !$selected{$i}
1580                             if ($list[$i]->[1] =~ /^(open list)/i);
1581                     }
1582                 } elsif (lc($str) eq "s") {
1583                     for (my $i = 0; $i < $count; $i++) {
1584                         $selected{$i} = !$selected{$i}
1585                             if ($list[$i]->[1] =~ /^(subscriber list)/i);
1586                     }
1587                 }
1588             } elsif ($sel eq "a") {
1589                 if ($val > 0 && $val <= $count) {
1590                     $authored{$val - 1} = !$authored{$val - 1};
1591                 } elsif ($str eq '*' || $str eq '^') {
1592                     my $toggle = 0;
1593                     $toggle = 1 if ($str eq '*');
1594                     for (my $i = 0; $i < $count; $i++) {
1595                         $authored{$i} = $toggle;
1596                     }
1597                 }
1598             } elsif ($sel eq "s") {
1599                 if ($val > 0 && $val <= $count) {
1600                     $signed{$val - 1} = !$signed{$val - 1};
1601                 } elsif ($str eq '*' || $str eq '^') {
1602                     my $toggle = 0;
1603                     $toggle = 1 if ($str eq '*');
1604                     for (my $i = 0; $i < $count; $i++) {
1605                         $signed{$i} = $toggle;
1606                     }
1607                 }
1608             } elsif ($sel eq "o") {
1609                 $print_options = 1;
1610                 $redraw = 1;
1611             } elsif ($sel eq "g") {
1612                 if ($str eq "f") {
1613                     bool_invert(\$email_git_fallback);
1614                 } else {
1615                     bool_invert(\$email_git);
1616                 }
1617                 $rerun = 1;
1618             } elsif ($sel eq "b") {
1619                 if ($str eq "s") {
1620                     bool_invert(\$email_git_blame_signatures);
1621                 } else {
1622                     bool_invert(\$email_git_blame);
1623                 }
1624                 $rerun = 1;
1625             } elsif ($sel eq "c") {
1626                 if ($val > 0) {
1627                     $email_git_min_signatures = $val;
1628                     $rerun = 1;
1629                 }
1630             } elsif ($sel eq "x") {
1631                 if ($val > 0) {
1632                     $email_git_max_maintainers = $val;
1633                     $rerun = 1;
1634                 }
1635             } elsif ($sel eq "%") {
1636                 if ($str ne "" && $val >= 0) {
1637                     $email_git_min_percent = $val;
1638                     $rerun = 1;
1639                 }
1640             } elsif ($sel eq "d") {
1641                 if (vcs_is_git()) {
1642                     $email_git_since = $str;
1643                 } elsif (vcs_is_hg()) {
1644                     $email_hg_since = $str;
1645                 }
1646                 $rerun = 1;
1647             } elsif ($sel eq "t") {
1648                 bool_invert(\$email_git_all_signature_types);
1649                 $rerun = 1;
1650             } elsif ($sel eq "f") {
1651                 bool_invert(\$file_emails);
1652                 $rerun = 1;
1653             } elsif ($sel eq "r") {
1654                 bool_invert(\$email_remove_duplicates);
1655                 $rerun = 1;
1656             } elsif ($sel eq "m") {
1657                 bool_invert(\$email_use_mailmap);
1658                 read_mailmap();
1659                 $rerun = 1;
1660             } elsif ($sel eq "k") {
1661                 bool_invert(\$keywords);
1662                 $rerun = 1;
1663             } elsif ($sel eq "p") {
1664                 if ($str ne "" && $val >= 0) {
1665                     $pattern_depth = $val;
1666                     $rerun = 1;
1667                 }
1668             } elsif ($sel eq "h" || $sel eq "?") {
1669                 print STDERR <<EOT
1670
1671 Interactive mode allows you to select the various maintainers, submitters,
1672 commit signers and mailing lists that could be CC'd on a patch.
1673
1674 Any *'d entry is selected.
1675
1676 If you have git or hg installed, you can choose to summarize the commit
1677 history of files in the patch.  Also, each line of the current file can
1678 be matched to its commit author and that commits signers with blame.
1679
1680 Various knobs exist to control the length of time for active commit
1681 tracking, the maximum number of commit authors and signers to add,
1682 and such.
1683
1684 Enter selections at the prompt until you are satisfied that the selected
1685 maintainers are appropriate.  You may enter multiple selections separated
1686 by either commas or spaces.
1687
1688 EOT
1689             } else {
1690                 print STDERR "invalid option: '$nr'\n";
1691                 $redraw = 0;
1692             }
1693         }
1694         if ($rerun) {
1695             print STDERR "git-blame can be very slow, please have patience..."
1696                 if ($email_git_blame);
1697             goto &get_maintainers;
1698         }
1699     }
1700
1701     #drop not selected entries
1702     $count = 0;
1703     my @new_emailto = ();
1704     foreach my $entry (@list) {
1705         if ($selected{$count}) {
1706             push(@new_emailto, $list[$count]);
1707         }
1708         $count++;
1709     }
1710     return @new_emailto;
1711 }
1712
1713 sub bool_invert {
1714     my ($bool_ref) = @_;
1715
1716     if ($$bool_ref) {
1717         $$bool_ref = 0;
1718     } else {
1719         $$bool_ref = 1;
1720     }
1721 }
1722
1723 sub deduplicate_email {
1724     my ($email) = @_;
1725
1726     my $matched = 0;
1727     my ($name, $address) = parse_email($email);
1728     $email = format_email($name, $address, 1);
1729     $email = mailmap_email($email);
1730
1731     return $email if (!$email_remove_duplicates);
1732
1733     ($name, $address) = parse_email($email);
1734
1735     if ($name ne "" && $deduplicate_name_hash{lc($name)}) {
1736         $name = $deduplicate_name_hash{lc($name)}->[0];
1737         $address = $deduplicate_name_hash{lc($name)}->[1];
1738         $matched = 1;
1739     } elsif ($deduplicate_address_hash{lc($address)}) {
1740         $name = $deduplicate_address_hash{lc($address)}->[0];
1741         $address = $deduplicate_address_hash{lc($address)}->[1];
1742         $matched = 1;
1743     }
1744     if (!$matched) {
1745         $deduplicate_name_hash{lc($name)} = [ $name, $address ];
1746         $deduplicate_address_hash{lc($address)} = [ $name, $address ];
1747     }
1748     $email = format_email($name, $address, 1);
1749     $email = mailmap_email($email);
1750     return $email;
1751 }
1752
1753 sub save_commits_by_author {
1754     my (@lines) = @_;
1755
1756     my @authors = ();
1757     my @commits = ();
1758     my @subjects = ();
1759
1760     foreach my $line (@lines) {
1761         if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
1762             my $author = $1;
1763             $author = deduplicate_email($author);
1764             push(@authors, $author);
1765         }
1766         push(@commits, $1) if ($line =~ m/$VCS_cmds{"commit_pattern"}/);
1767         push(@subjects, $1) if ($line =~ m/$VCS_cmds{"subject_pattern"}/);
1768     }
1769
1770     for (my $i = 0; $i < @authors; $i++) {
1771         my $exists = 0;
1772         foreach my $ref(@{$commit_author_hash{$authors[$i]}}) {
1773             if (@{$ref}[0] eq $commits[$i] &&
1774                 @{$ref}[1] eq $subjects[$i]) {
1775                 $exists = 1;
1776                 last;
1777             }
1778         }
1779         if (!$exists) {
1780             push(@{$commit_author_hash{$authors[$i]}},
1781                  [ ($commits[$i], $subjects[$i]) ]);
1782         }
1783     }
1784 }
1785
1786 sub save_commits_by_signer {
1787     my (@lines) = @_;
1788
1789     my $commit = "";
1790     my $subject = "";
1791
1792     foreach my $line (@lines) {
1793         $commit = $1 if ($line =~ m/$VCS_cmds{"commit_pattern"}/);
1794         $subject = $1 if ($line =~ m/$VCS_cmds{"subject_pattern"}/);
1795         if ($line =~ /^[ \t]*${signature_pattern}.*\@.*$/) {
1796             my @signatures = ($line);
1797             my ($types_ref, $signers_ref) = extract_formatted_signatures(@signatures);
1798             my @types = @$types_ref;
1799             my @signers = @$signers_ref;
1800
1801             my $type = $types[0];
1802             my $signer = $signers[0];
1803
1804             $signer = deduplicate_email($signer);
1805
1806             my $exists = 0;
1807             foreach my $ref(@{$commit_signer_hash{$signer}}) {
1808                 if (@{$ref}[0] eq $commit &&
1809                     @{$ref}[1] eq $subject &&
1810                     @{$ref}[2] eq $type) {
1811                     $exists = 1;
1812                     last;
1813                 }
1814             }
1815             if (!$exists) {
1816                 push(@{$commit_signer_hash{$signer}},
1817                      [ ($commit, $subject, $type) ]);
1818             }
1819         }
1820     }
1821 }
1822
1823 sub vcs_assign {
1824     my ($role, $divisor, @lines) = @_;
1825
1826     my %hash;
1827     my $count = 0;
1828
1829     return if (@lines <= 0);
1830
1831     if ($divisor <= 0) {
1832         warn("Bad divisor in " . (caller(0))[3] . ": $divisor\n");
1833         $divisor = 1;
1834     }
1835
1836     @lines = mailmap(@lines);
1837
1838     return if (@lines <= 0);
1839
1840     @lines = sort(@lines);
1841
1842     # uniq -c
1843     $hash{$_}++ for @lines;
1844
1845     # sort -rn
1846     foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
1847         my $sign_offs = $hash{$line};
1848         my $percent = $sign_offs * 100 / $divisor;
1849
1850         $percent = 100 if ($percent > 100);
1851         $count++;
1852         last if ($sign_offs < $email_git_min_signatures ||
1853                  $count > $email_git_max_maintainers ||
1854                  $percent < $email_git_min_percent);
1855         push_email_address($line, '');
1856         if ($output_rolestats) {
1857             my $fmt_percent = sprintf("%.0f", $percent);
1858             add_role($line, "$role:$sign_offs/$divisor=$fmt_percent%");
1859         } else {
1860             add_role($line, $role);
1861         }
1862     }
1863 }
1864
1865 sub vcs_file_signoffs {
1866     my ($file) = @_;
1867
1868     my $authors_ref;
1869     my $signers_ref;
1870     my $stats_ref;
1871     my @authors = ();
1872     my @signers = ();
1873     my @stats = ();
1874     my $commits;
1875
1876     $vcs_used = vcs_exists();
1877     return if (!$vcs_used);
1878
1879     my $cmd = $VCS_cmds{"find_signers_cmd"};
1880     $cmd =~ s/(\$\w+)/$1/eeg;           # interpolate $cmd
1881
1882     ($commits, $signers_ref, $authors_ref, $stats_ref) = vcs_find_signers($cmd, $file);
1883
1884     @signers = @{$signers_ref} if defined $signers_ref;
1885     @authors = @{$authors_ref} if defined $authors_ref;
1886     @stats = @{$stats_ref} if defined $stats_ref;
1887
1888 #    print("commits: <$commits>\nsigners:<@signers>\nauthors: <@authors>\nstats: <@stats>\n");
1889
1890     foreach my $signer (@signers) {
1891         $signer = deduplicate_email($signer);
1892     }
1893
1894     vcs_assign("commit_signer", $commits, @signers);
1895     vcs_assign("authored", $commits, @authors);
1896     if ($#authors == $#stats) {
1897         my $stat_pattern = $VCS_cmds{"stat_pattern"};
1898         $stat_pattern =~ s/(\$\w+)/$1/eeg;      #interpolate $stat_pattern
1899
1900         my $added = 0;
1901         my $deleted = 0;
1902         for (my $i = 0; $i <= $#stats; $i++) {
1903             if ($stats[$i] =~ /$stat_pattern/) {
1904                 $added += $1;
1905                 $deleted += $2;
1906             }
1907         }
1908         my @tmp_authors = uniq(@authors);
1909         foreach my $author (@tmp_authors) {
1910             $author = deduplicate_email($author);
1911         }
1912         @tmp_authors = uniq(@tmp_authors);
1913         my @list_added = ();
1914         my @list_deleted = ();
1915         foreach my $author (@tmp_authors) {
1916             my $auth_added = 0;
1917             my $auth_deleted = 0;
1918             for (my $i = 0; $i <= $#stats; $i++) {
1919                 if ($author eq deduplicate_email($authors[$i]) &&
1920                     $stats[$i] =~ /$stat_pattern/) {
1921                     $auth_added += $1;
1922                     $auth_deleted += $2;
1923                 }
1924             }
1925             for (my $i = 0; $i < $auth_added; $i++) {
1926                 push(@list_added, $author);
1927             }
1928             for (my $i = 0; $i < $auth_deleted; $i++) {
1929                 push(@list_deleted, $author);
1930             }
1931         }
1932         vcs_assign("added_lines", $added, @list_added);
1933         vcs_assign("removed_lines", $deleted, @list_deleted);
1934     }
1935 }
1936
1937 sub vcs_file_blame {
1938     my ($file) = @_;
1939
1940     my @signers = ();
1941     my @all_commits = ();
1942     my @commits = ();
1943     my $total_commits;
1944     my $total_lines;
1945
1946     $vcs_used = vcs_exists();
1947     return if (!$vcs_used);
1948
1949     @all_commits = vcs_blame($file);
1950     @commits = uniq(@all_commits);
1951     $total_commits = @commits;
1952     $total_lines = @all_commits;
1953
1954     if ($email_git_blame_signatures) {
1955         if (vcs_is_hg()) {
1956             my $commit_count;
1957             my $commit_authors_ref;
1958             my $commit_signers_ref;
1959             my $stats_ref;
1960             my @commit_authors = ();
1961             my @commit_signers = ();
1962             my $commit = join(" -r ", @commits);
1963             my $cmd;
1964
1965             $cmd = $VCS_cmds{"find_commit_signers_cmd"};
1966             $cmd =~ s/(\$\w+)/$1/eeg;   #substitute variables in $cmd
1967
1968             ($commit_count, $commit_signers_ref, $commit_authors_ref, $stats_ref) = vcs_find_signers($cmd, $file);
1969             @commit_authors = @{$commit_authors_ref} if defined $commit_authors_ref;
1970             @commit_signers = @{$commit_signers_ref} if defined $commit_signers_ref;
1971
1972             push(@signers, @commit_signers);
1973         } else {
1974             foreach my $commit (@commits) {
1975                 my $commit_count;
1976                 my $commit_authors_ref;
1977                 my $commit_signers_ref;
1978                 my $stats_ref;
1979                 my @commit_authors = ();
1980                 my @commit_signers = ();
1981                 my $cmd;
1982
1983                 $cmd = $VCS_cmds{"find_commit_signers_cmd"};
1984                 $cmd =~ s/(\$\w+)/$1/eeg;       #substitute variables in $cmd
1985
1986                 ($commit_count, $commit_signers_ref, $commit_authors_ref, $stats_ref) = vcs_find_signers($cmd, $file);
1987                 @commit_authors = @{$commit_authors_ref} if defined $commit_authors_ref;
1988                 @commit_signers = @{$commit_signers_ref} if defined $commit_signers_ref;
1989
1990                 push(@signers, @commit_signers);
1991             }
1992         }
1993     }
1994
1995     if ($from_filename) {
1996         if ($output_rolestats) {
1997             my @blame_signers;
1998             if (vcs_is_hg()) {{         # Double brace for last exit
1999                 my $commit_count;
2000                 my @commit_signers = ();
2001                 @commits = uniq(@commits);
2002                 @commits = sort(@commits);
2003                 my $commit = join(" -r ", @commits);
2004                 my $cmd;
2005
2006                 $cmd = $VCS_cmds{"find_commit_author_cmd"};
2007                 $cmd =~ s/(\$\w+)/$1/eeg;       #substitute variables in $cmd
2008
2009                 my @lines = ();
2010
2011                 @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
2012
2013                 if (!$email_git_penguin_chiefs) {
2014                     @lines = grep(!/${penguin_chiefs}/i, @lines);
2015                 }
2016
2017                 last if !@lines;
2018
2019                 my @authors = ();
2020                 foreach my $line (@lines) {
2021                     if ($line =~ m/$VCS_cmds{"author_pattern"}/) {
2022                         my $author = $1;
2023                         $author = deduplicate_email($author);
2024                         push(@authors, $author);
2025                     }
2026                 }
2027
2028                 save_commits_by_author(@lines) if ($interactive);
2029                 save_commits_by_signer(@lines) if ($interactive);
2030
2031                 push(@signers, @authors);
2032             }}
2033             else {
2034                 foreach my $commit (@commits) {
2035                     my $i;
2036                     my $cmd = $VCS_cmds{"find_commit_author_cmd"};
2037                     $cmd =~ s/(\$\w+)/$1/eeg;   #interpolate $cmd
2038                     my @author = vcs_find_author($cmd);
2039                     next if !@author;
2040
2041                     my $formatted_author = deduplicate_email($author[0]);
2042
2043                     my $count = grep(/$commit/, @all_commits);
2044                     for ($i = 0; $i < $count ; $i++) {
2045                         push(@blame_signers, $formatted_author);
2046                     }
2047                 }
2048             }
2049             if (@blame_signers) {
2050                 vcs_assign("authored lines", $total_lines, @blame_signers);
2051             }
2052         }
2053         foreach my $signer (@signers) {
2054             $signer = deduplicate_email($signer);
2055         }
2056         vcs_assign("commits", $total_commits, @signers);
2057     } else {
2058         foreach my $signer (@signers) {
2059             $signer = deduplicate_email($signer);
2060         }
2061         vcs_assign("modified commits", $total_commits, @signers);
2062     }
2063 }
2064
2065 sub uniq {
2066     my (@parms) = @_;
2067
2068     my %saw;
2069     @parms = grep(!$saw{$_}++, @parms);
2070     return @parms;
2071 }
2072
2073 sub sort_and_uniq {
2074     my (@parms) = @_;
2075
2076     my %saw;
2077     @parms = sort @parms;
2078     @parms = grep(!$saw{$_}++, @parms);
2079     return @parms;
2080 }
2081
2082 sub clean_file_emails {
2083     my (@file_emails) = @_;
2084     my @fmt_emails = ();
2085
2086     foreach my $email (@file_emails) {
2087         $email =~ s/[\(\<\{]{0,1}([A-Za-z0-9_\.\+-]+\@[A-Za-z0-9\.-]+)[\)\>\}]{0,1}/\<$1\>/g;
2088         my ($name, $address) = parse_email($email);
2089         if ($name eq '"[,\.]"') {
2090             $name = "";
2091         }
2092
2093         my @nw = split(/[^A-Za-zÀ-ÿ\'\,\.\+-]/, $name);
2094         if (@nw > 2) {
2095             my $first = $nw[@nw - 3];
2096             my $middle = $nw[@nw - 2];
2097             my $last = $nw[@nw - 1];
2098
2099             if (((length($first) == 1 && $first =~ m/[A-Za-z]/) ||
2100                  (length($first) == 2 && substr($first, -1) eq ".")) ||
2101                 (length($middle) == 1 ||
2102                  (length($middle) == 2 && substr($middle, -1) eq "."))) {
2103                 $name = "$first $middle $last";
2104             } else {
2105                 $name = "$middle $last";
2106             }
2107         }
2108
2109         if (substr($name, -1) =~ /[,\.]/) {
2110             $name = substr($name, 0, length($name) - 1);
2111         } elsif (substr($name, -2) =~ /[,\.]"/) {
2112             $name = substr($name, 0, length($name) - 2) . '"';
2113         }
2114
2115         if (substr($name, 0, 1) =~ /[,\.]/) {
2116             $name = substr($name, 1, length($name) - 1);
2117         } elsif (substr($name, 0, 2) =~ /"[,\.]/) {
2118             $name = '"' . substr($name, 2, length($name) - 2);
2119         }
2120
2121         my $fmt_email = format_email($name, $address, $email_usename);
2122         push(@fmt_emails, $fmt_email);
2123     }
2124     return @fmt_emails;
2125 }
2126
2127 sub merge_email {
2128     my @lines;
2129     my %saw;
2130
2131     for (@_) {
2132         my ($address, $role) = @$_;
2133         if (!$saw{$address}) {
2134             if ($output_roles) {
2135                 push(@lines, "$address ($role)");
2136             } else {
2137                 push(@lines, $address);
2138             }
2139             $saw{$address} = 1;
2140         }
2141     }
2142
2143     return @lines;
2144 }
2145
2146 sub output {
2147     my (@parms) = @_;
2148
2149     if ($output_multiline) {
2150         foreach my $line (@parms) {
2151             print("${line}\n");
2152         }
2153     } else {
2154         print(join($output_separator, @parms));
2155         print("\n");
2156     }
2157 }
2158
2159 my $rfc822re;
2160
2161 sub make_rfc822re {
2162 #   Basic lexical tokens are specials, domain_literal, quoted_string, atom, and
2163 #   comment.  We must allow for rfc822_lwsp (or comments) after each of these.
2164 #   This regexp will only work on addresses which have had comments stripped
2165 #   and replaced with rfc822_lwsp.
2166
2167     my $specials = '()<>@,;:\\\\".\\[\\]';
2168     my $controls = '\\000-\\037\\177';
2169
2170     my $dtext = "[^\\[\\]\\r\\\\]";
2171     my $domain_literal = "\\[(?:$dtext|\\\\.)*\\]$rfc822_lwsp*";
2172
2173     my $quoted_string = "\"(?:[^\\\"\\r\\\\]|\\\\.|$rfc822_lwsp)*\"$rfc822_lwsp*";
2174
2175 #   Use zero-width assertion to spot the limit of an atom.  A simple
2176 #   $rfc822_lwsp* causes the regexp engine to hang occasionally.
2177     my $atom = "[^$specials $controls]+(?:$rfc822_lwsp+|\\Z|(?=[\\[\"$specials]))";
2178     my $word = "(?:$atom|$quoted_string)";
2179     my $localpart = "$word(?:\\.$rfc822_lwsp*$word)*";
2180
2181     my $sub_domain = "(?:$atom|$domain_literal)";
2182     my $domain = "$sub_domain(?:\\.$rfc822_lwsp*$sub_domain)*";
2183
2184     my $addr_spec = "$localpart\@$rfc822_lwsp*$domain";
2185
2186     my $phrase = "$word*";
2187     my $route = "(?:\@$domain(?:,\@$rfc822_lwsp*$domain)*:$rfc822_lwsp*)";
2188     my $route_addr = "\\<$rfc822_lwsp*$route?$addr_spec\\>$rfc822_lwsp*";
2189     my $mailbox = "(?:$addr_spec|$phrase$route_addr)";
2190
2191     my $group = "$phrase:$rfc822_lwsp*(?:$mailbox(?:,\\s*$mailbox)*)?;\\s*";
2192     my $address = "(?:$mailbox|$group)";
2193
2194     return "$rfc822_lwsp*$address";
2195 }
2196
2197 sub rfc822_strip_comments {
2198     my $s = shift;
2199 #   Recursively remove comments, and replace with a single space.  The simpler
2200 #   regexps in the Email Addressing FAQ are imperfect - they will miss escaped
2201 #   chars in atoms, for example.
2202
2203     while ($s =~ s/^((?:[^"\\]|\\.)*
2204                     (?:"(?:[^"\\]|\\.)*"(?:[^"\\]|\\.)*)*)
2205                     \((?:[^()\\]|\\.)*\)/$1 /osx) {}
2206     return $s;
2207 }
2208
2209 #   valid: returns true if the parameter is an RFC822 valid address
2210 #
2211 sub rfc822_valid {
2212     my $s = rfc822_strip_comments(shift);
2213
2214     if (!$rfc822re) {
2215         $rfc822re = make_rfc822re();
2216     }
2217
2218     return $s =~ m/^$rfc822re$/so && $s =~ m/^$rfc822_char*$/;
2219 }
2220
2221 #   validlist: In scalar context, returns true if the parameter is an RFC822
2222 #              valid list of addresses.
2223 #
2224 #              In list context, returns an empty list on failure (an invalid
2225 #              address was found); otherwise a list whose first element is the
2226 #              number of addresses found and whose remaining elements are the
2227 #              addresses.  This is needed to disambiguate failure (invalid)
2228 #              from success with no addresses found, because an empty string is
2229 #              a valid list.
2230
2231 sub rfc822_validlist {
2232     my $s = rfc822_strip_comments(shift);
2233
2234     if (!$rfc822re) {
2235         $rfc822re = make_rfc822re();
2236     }
2237     # * null list items are valid according to the RFC
2238     # * the '1' business is to aid in distinguishing failure from no results
2239
2240     my @r;
2241     if ($s =~ m/^(?:$rfc822re)?(?:,(?:$rfc822re)?)*$/so &&
2242         $s =~ m/^$rfc822_char*$/) {
2243         while ($s =~ m/(?:^|,$rfc822_lwsp*)($rfc822re)/gos) {
2244             push(@r, $1);
2245         }
2246         return wantarray ? (scalar(@r), @r) : 1;
2247     }
2248     return wantarray ? () : 0;
2249 }