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_maintainers.pl [OPTIONS] <patch>
   9 #        perl scripts/get_maintainers.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 = '0.21';
  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 = 1;
  27 my $email_git_penguin_chiefs = 0;
  28 my $email_git_min_signatures = 1;
  29 my $email_git_max_maintainers = 5;
  30 my $email_git_min_percent = 5;
  31 my $email_git_since = "1-year-ago";
  32 my $email_git_blame = 0;
  33 my $email_remove_duplicates = 1;
  34 my $output_multiline = 1;
  35 my $output_separator = ", ";
  36 my $scm = 0;
  37 my $web = 0;
  38 my $subsystem = 0;
  39 my $status = 0;
  40 my $keywords = 1;
  41 my $from_filename = 0;
  42 my $pattern_depth = 0;
  43 my $version = 0;
  44 my $help = 0;
  45
  46 my $exit = 0;
  47
  48 my @penguin_chief = ();
  49 push(@penguin_chief,"Linus Torvalds:torvalds\@linux-foundation.org");
  50 #Andrew wants in on most everything - 2009/01/14
  51 #push(@penguin_chief,"Andrew Morton:akpm\@linux-foundation.org");
  52
  53 my @penguin_chief_names = ();
  54 foreach my $chief (@penguin_chief) {
  55     if ($chief =~ m/^(.*):(.*)/) {
  56         my $chief_name = $1;
  57         my $chief_addr = $2;
  58         push(@penguin_chief_names, $chief_name);
  59     }
  60 }
  61 my $penguin_chiefs = "\(" . join("|",@penguin_chief_names) . "\)";
  62
  63 # rfc822 email address - preloaded methods go here.
  64 my $rfc822_lwsp = "(?:(?:\\r\\n)?[ \\t])";
  65 my $rfc822_char = '[\\000-\\377]';
  66
  67 if (!GetOptions(
  68                 'email!' => \$email,
  69                 'git!' => \$email_git,
  70                 'git-chief-penguins!' => \$email_git_penguin_chiefs,
  71                 'git-min-signatures=i' => \$email_git_min_signatures,
  72                 'git-max-maintainers=i' => \$email_git_max_maintainers,
  73                 'git-min-percent=i' => \$email_git_min_percent,
  74                 'git-since=s' => \$email_git_since,
  75                 'git-blame!' => \$email_git_blame,
  76                 'remove-duplicates!' => \$email_remove_duplicates,
  77                 'm!' => \$email_maintainer,
  78                 'n!' => \$email_usename,
  79                 'l!' => \$email_list,
  80                 's!' => \$email_subscriber_list,
  81                 'multiline!' => \$output_multiline,
  82                 'separator=s' => \$output_separator,
  83                 'subsystem!' => \$subsystem,
  84                 'status!' => \$status,
  85                 'scm!' => \$scm,
  86                 'web!' => \$web,
  87                 'pattern-depth=i' => \$pattern_depth,
  88                 'k|keywords!' => \$keywords,
  89                 'f|file' => \$from_filename,
  90                 'v|version' => \$version,
  91                 'h|help' => \$help,
  92                 )) {
  93     usage();
  94     die "$P: invalid argument\n";
  95 }
  96
  97 if ($help != 0) {
  98     usage();
  99     exit 0;
 100 }
 101
 102 if ($version != 0) {
 103     print("${P} ${V}\n");
 104     exit 0;
 105 }
 106
 107 if ($#ARGV < 0) {
 108     usage();
 109     die "$P: argument missing: patchfile or -f file please\n";
 110 }
 111
 112 if ($output_separator ne ", ") {
 113     $output_multiline = 0;
 114 }
 115
 116 my $selections = $email + $scm + $status + $subsystem + $web;
 117 if ($selections == 0) {
 118     usage();
 119     die "$P:  Missing required option: email, scm, status, subsystem or web\n";
 120 }
 121
 122 if ($email &&
 123     ($email_maintainer + $email_list + $email_subscriber_list +
 124      $email_git + $email_git_penguin_chiefs + $email_git_blame) == 0) {
 125     usage();
 126     die "$P: Please select at least 1 email option\n";
 127 }
 128
 129 if (!top_of_kernel_tree($lk_path)) {
 130     die "$P: The current directory does not appear to be "
 131         . "a linux kernel source tree.\n";
 132 }
 133
 134 ## Read MAINTAINERS for type/value pairs
 135
 136 my @typevalue = ();
 137 my %keyword_hash;
 138
 139 open(MAINT, "<${lk_path}MAINTAINERS") || die "$P: Can't open MAINTAINERS\n";
 140 while (<MAINT>) {
 141     my $line = $_;
 142
 143     if ($line =~ m/^(\C):\s*(.*)/) {
 144         my $type = $1;
 145         my $value = $2;
 146
 147         ##Filename pattern matching
 148         if ($type eq "F" || $type eq "X") {
 149             $value =~ s@\.@\\\.@g;       ##Convert . to \.
 150             $value =~ s/\*/\.\*/g;       ##Convert * to .*
 151             $value =~ s/\?/\./g;         ##Convert ? to .
 152             ##if pattern is a directory and it lacks a trailing slash, add one
 153             if ((-d $value)) {
 154                 $value =~ s@([^/])$@$1/@;
 155             }
 156         } elsif ($type eq "K") {
 157             $keyword_hash{@typevalue} = $value;
 158         }
 159         push(@typevalue, "$type:$value");
 160     } elsif (!/^(\s)*$/) {
 161         $line =~ s/\n$//g;
 162         push(@typevalue, $line);
 163     }
 164 }
 165 close(MAINT);
 166
 167 my %mailmap;
 168
 169 if ($email_remove_duplicates) {
 170     open(MAILMAP, "<${lk_path}.mailmap") || warn "$P: Can't open .mailmap\n";
 171     while (<MAILMAP>) {
 172         my $line = $_;
 173
 174         next if ($line =~ m/^\s*#/);
 175         next if ($line =~ m/^\s*$/);
 176
 177         my ($name, $address) = parse_email($line);
 178         $line = format_email($name, $address);
 179
 180         next if ($line =~ m/^\s*$/);
 181
 182         if (exists($mailmap{$name})) {
 183             my $obj = $mailmap{$name};
 184             push(@$obj, $address);
 185         } else {
 186             my @arr = ($address);
 187             $mailmap{$name} = \@arr;
 188         }
 189     }
 190     close(MAILMAP);
 191 }
 192
 193 ## use the filenames on the command line or find the filenames in the patchfiles
 194
 195 my @files = ();
 196 my @range = ();
 197 my @keyword_tvi = ();
 198
 199 foreach my $file (@ARGV) {
 200     ##if $file is a directory and it lacks a trailing slash, add one
 201     if ((-d $file)) {
 202         $file =~ s@([^/])$@$1/@;
 203     } elsif (!(-f $file)) {
 204         die "$P: file '${file}' not found\n";
 205     }
 206     if ($from_filename) {
 207         push(@files, $file);
 208         if (-f $file && $keywords) {
 209             open(FILE, "<$file") or die "$P: Can't open ${file}\n";
 210             while (<FILE>) {
 211                 my $patch_line = $_;
 212                 foreach my $line (keys %keyword_hash) {
 213                     if ($patch_line =~ m/^.*$keyword_hash{$line}/x) {
 214                         push(@keyword_tvi, $line);
 215                     }
 216                 }
 217             }
 218             close(FILE);
 219         }
 220     } else {
 221         my $file_cnt = @files;
 222         my $lastfile;
 223         open(PATCH, "<$file") or die "$P: Can't open ${file}\n";
 224         while (<PATCH>) {
 225             my $patch_line = $_;
 226             if (m/^\+\+\+\s+(\S+)/) {
 227                 my $filename = $1;
 228                 $filename =~ s@^[^/]*/@@;
 229                 $filename =~ s@\n@@;
 230                 $lastfile = $filename;
 231                 push(@files, $filename);
 232             } elsif (m/^\@\@ -(\d+),(\d+)/) {
 233                 if ($email_git_blame) {
 234                     push(@range, "$lastfile:$1:$2");
 235                 }
 236             } elsif ($keywords) {
 237                 foreach my $line (keys %keyword_hash) {
 238                     if ($patch_line =~ m/^[+-].*$keyword_hash{$line}/x) {
 239                         push(@keyword_tvi, $line);
 240                     }
 241                 }
 242             }
 243         }
 244         close(PATCH);
 245         if ($file_cnt == @files) {
 246             warn "$P: file '${file}' doesn't appear to be a patch.  "
 247                 . "Add -f to options?\n";
 248         }
 249         @files = sort_and_uniq(@files);
 250     }
 251 }
 252
 253 my @email_to = ();
 254 my @list_to = ();
 255 my @scm = ();
 256 my @web = ();
 257 my @subsystem = ();
 258 my @status = ();
 259
 260 # Find responsible parties
 261
 262 foreach my $file (@files) {
 263
 264 #Do not match excluded file patterns
 265
 266     my $exclude = 0;
 267     foreach my $line (@typevalue) {
 268         if ($line =~ m/^(\C):\s*(.*)/) {
 269             my $type = $1;
 270             my $value = $2;
 271             if ($type eq 'X') {
 272                 if (file_match_pattern($file, $value)) {
 273                     $exclude = 1;
 274                     last;
 275                 }
 276             }
 277         }
 278     }
 279
 280     if (!$exclude) {
 281         my $tvi = 0;
 282         my %hash;
 283         foreach my $line (@typevalue) {
 284             if ($line =~ m/^(\C):\s*(.*)/) {
 285                 my $type = $1;
 286                 my $value = $2;
 287                 if ($type eq 'F') {
 288                     if (file_match_pattern($file, $value)) {
 289                         my $value_pd = ($value =~ tr@/@@);
 290                         my $file_pd = ($file  =~ tr@/@@);
 291                         $value_pd++ if (substr($value,-1,1) ne "/");
 292                         if ($pattern_depth == 0 ||
 293                             (($file_pd - $value_pd) < $pattern_depth)) {
 294                             $hash{$tvi} = $value_pd;
 295                         }
 296                     }
 297                 }
 298             }
 299             $tvi++;
 300         }
 301         foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
 302             add_categories($line);
 303         }
 304     }
 305
 306     if ($email && $email_git) {
 307         recent_git_signoffs($file);
 308     }
 309
 310     if ($email && $email_git_blame) {
 311         git_assign_blame($file);
 312     }
 313 }
 314
 315 if ($keywords) {
 316     @keyword_tvi = sort_and_uniq(@keyword_tvi);
 317     foreach my $line (@keyword_tvi) {
 318         add_categories($line);
 319     }
 320 }
 321
 322 if ($email) {
 323     foreach my $chief (@penguin_chief) {
 324         if ($chief =~ m/^(.*):(.*)/) {
 325             my $email_address;
 326
 327             $email_address = format_email($1, $2);
 328             if ($email_git_penguin_chiefs) {
 329                 push(@email_to, $email_address);
 330             } else {
 331                 @email_to = grep(!/${email_address}/, @email_to);
 332             }
 333         }
 334     }
 335 }
 336
 337 if ($email || $email_list) {
 338     my @to = ();
 339     if ($email) {
 340         @to = (@to, @email_to);
 341     }
 342     if ($email_list) {
 343         @to = (@to, @list_to);
 344     }
 345     output(uniq(@to));
 346 }
 347
 348 if ($scm) {
 349     @scm = uniq(@scm);
 350     output(@scm);
 351 }
 352
 353 if ($status) {
 354     @status = uniq(@status);
 355     output(@status);
 356 }
 357
 358 if ($subsystem) {
 359     @subsystem = uniq(@subsystem);
 360     output(@subsystem);
 361 }
 362
 363 if ($web) {
 364     @web = uniq(@web);
 365     output(@web);
 366 }
 367
 368 exit($exit);
 369
 370 sub file_match_pattern {
 371     my ($file, $pattern) = @_;
 372     if (substr($pattern, -1) eq "/") {
 373         if ($file =~ m@^$pattern@) {
 374             return 1;
 375         }
 376     } else {
 377         if ($file =~ m@^$pattern@) {
 378             my $s1 = ($file =~ tr@/@@);
 379             my $s2 = ($pattern =~ tr@/@@);
 380             if ($s1 == $s2) {
 381                 return 1;
 382             }
 383         }
 384     }
 385     return 0;
 386 }
 387
 388 sub usage {
 389     print <<EOT;
 390 usage: $P [options] patchfile
 391        $P [options] -f file|directory
 392 version: $V
 393
 394 MAINTAINER field selection options:
 395   --email => print email address(es) if any
 396     --git => include recent git \*-by: signers
 397     --git-chief-penguins => include ${penguin_chiefs}
 398     --git-min-signatures => number of signatures required (default: 1)
 399     --git-max-maintainers => maximum maintainers to add (default: 5)
 400     --git-min-percent => minimum percentage of commits required (default: 5)
 401     --git-since => git history to use (default: 1-year-ago)
 402     --git-blame => use git blame to find modified commits for patch or file
 403     --m => include maintainer(s) if any
 404     --n => include name 'Full Name <addr\@domain.tld>'
 405     --l => include list(s) if any
 406     --s => include subscriber only list(s) if any
 407     --remove-duplicates => minimize duplicate email names/addresses
 408   --scm => print SCM tree(s) if any
 409   --status => print status if any
 410   --subsystem => print subsystem name if any
 411   --web => print website(s) if any
 412
 413 Output type options:
 414   --separator [, ] => separator for multiple entries on 1 line
 415     using --separator also sets --nomultiline if --separator is not [, ]
 416   --multiline => print 1 entry per line
 417
 418 Other options:
 419   --pattern-depth => Number of pattern directory traversals (default: 0 (all))
 420   --keywords => scan patch for keywords (default: 1 (on))
 421   --version => show version
 422   --help => show this help information
 423
 424 Default options:
 425   [--email --git --m --n --l --multiline --pattern-depth=0 --remove-duplicates]
 426
 427 Notes:
 428   Using "-f directory" may give unexpected results:
 429       Used with "--git", git signators for _all_ files in and below
 430           directory are examined as git recurses directories.
 431           Any specified X: (exclude) pattern matches are _not_ ignored.
 432       Used with "--nogit", directory is used as a pattern match,
 433          no individual file within the directory or subdirectory
 434          is matched.
 435       Used with "--git-blame", does not iterate all files in directory
 436   Using "--git-blame" is slow and may add old committers and authors
 437       that are no longer active maintainers to the output.
 438 EOT
 439 }
 440
 441 sub top_of_kernel_tree {
 442         my ($lk_path) = @_;
 443
 444         if ($lk_path ne "" && substr($lk_path,length($lk_path)-1,1) ne "/") {
 445             $lk_path .= "/";
 446         }
 447         if (   (-f "${lk_path}COPYING")
 448             && (-f "${lk_path}CREDITS")
 449             && (-f "${lk_path}Kbuild")
 450             && (-f "${lk_path}MAINTAINERS")
 451             && (-f "${lk_path}Makefile")
 452             && (-f "${lk_path}README")
 453             && (-d "${lk_path}Documentation")
 454             && (-d "${lk_path}arch")
 455             && (-d "${lk_path}include")
 456             && (-d "${lk_path}drivers")
 457             && (-d "${lk_path}fs")
 458             && (-d "${lk_path}init")
 459             && (-d "${lk_path}ipc")
 460             && (-d "${lk_path}kernel")
 461             && (-d "${lk_path}lib")
 462             && (-d "${lk_path}scripts")) {
 463                 return 1;
 464         }
 465         return 0;
 466 }
 467
 468 sub parse_email {
 469     my ($formatted_email) = @_;
 470
 471     my $name = "";
 472     my $address = "";
 473
 474     if ($formatted_email =~ /^([^<]+)<(.+\@.*)>.*$/) {
 475         $name = $1;
 476         $address = $2;
 477     } elsif ($formatted_email =~ /^\s*<(.+\@\S*)>.*$/) {
 478         $address = $1;
 479     } elsif ($formatted_email =~ /^(.+\@\S*).*$/) {
 480         $address = $1;
 481     }
 482
 483     $name =~ s/^\s+|\s+$//g;
 484     $name =~ s/^\"|\"$//g;
 485     $address =~ s/^\s+|\s+$//g;
 486
 487     if ($name =~ /[^a-z0-9 \.\-]/i) {    ##has "must quote" chars
 488         $name =~ s/(?<!\\)"/\\"/g;       ##escape quotes
 489         $name = "\"$name\"";
 490     }
 491
 492     return ($name, $address);
 493 }
 494
 495 sub format_email {
 496     my ($name, $address) = @_;
 497
 498     my $formatted_email;
 499
 500     $name =~ s/^\s+|\s+$//g;
 501     $name =~ s/^\"|\"$//g;
 502     $address =~ s/^\s+|\s+$//g;
 503
 504     if ($name =~ /[^a-z0-9 \.\-]/i) {    ##has "must quote" chars
 505         $name =~ s/(?<!\\)"/\\"/g;       ##escape quotes
 506         $name = "\"$name\"";
 507     }
 508
 509     if ($email_usename) {
 510         if ("$name" eq "") {
 511             $formatted_email = "$address";
 512         } else {
 513             $formatted_email = "$name <${address}>";
 514         }
 515     } else {
 516         $formatted_email = $address;
 517     }
 518
 519     return $formatted_email;
 520 }
 521
 522 sub find_starting_index {
 523     my ($index) = @_;
 524
 525     while ($index > 0) {
 526         my $tv = $typevalue[$index];
 527         if (!($tv =~ m/^(\C):\s*(.*)/)) {
 528             last;
 529         }
 530         $index--;
 531     }
 532
 533     return $index;
 534 }
 535
 536 sub find_ending_index {
 537     my ($index) = @_;
 538
 539     while ($index < @typevalue) {
 540         my $tv = $typevalue[$index];
 541         if (!($tv =~ m/^(\C):\s*(.*)/)) {
 542             last;
 543         }
 544         $index++;
 545     }
 546
 547     return $index;
 548 }
 549
 550 sub add_categories {
 551     my ($index) = @_;
 552
 553     my $i;
 554     my $start = find_starting_index($index);
 555     my $end = find_ending_index($index);
 556
 557     push(@subsystem, $typevalue[$start]);
 558
 559     for ($i = $start + 1; $i < $end; $i++) {
 560         my $tv = $typevalue[$i];
 561         if ($tv =~ m/^(\C):\s*(.*)/) {
 562             my $ptype = $1;
 563             my $pvalue = $2;
 564             if ($ptype eq "L") {
 565                 my $list_address = $pvalue;
 566                 my $list_additional = "";
 567                 if ($list_address =~ m/([^\s]+)\s+(.*)$/) {
 568                     $list_address = $1;
 569                     $list_additional = $2;
 570                 }
 571                 if ($list_additional =~ m/subscribers-only/) {
 572                     if ($email_subscriber_list) {
 573                         push(@list_to, $list_address);
 574                     }
 575                 } else {
 576                     if ($email_list) {
 577                         push(@list_to, $list_address);
 578                     }
 579                 }
 580             } elsif ($ptype eq "M") {
 581                 my ($name, $address) = parse_email($pvalue);
 582                 if ($name eq "") {
 583                     if ($i > 0) {
 584                         my $tv = $typevalue[$i - 1];
 585                         if ($tv =~ m/^(\C):\s*(.*)/) {
 586                             if ($1 eq "P") {
 587                                 $name = $2;
 588                                 $pvalue = format_email($name, $address);
 589                             }
 590                         }
 591                     }
 592                 }
 593                 if ($email_maintainer) {
 594                     push_email_addresses($pvalue);
 595                 }
 596             } elsif ($ptype eq "T") {
 597                 push(@scm, $pvalue);
 598             } elsif ($ptype eq "W") {
 599                 push(@web, $pvalue);
 600             } elsif ($ptype eq "S") {
 601                 push(@status, $pvalue);
 602             }
 603         }
 604     }
 605 }
 606
 607 my %email_hash_name;
 608 my %email_hash_address;
 609
 610 sub email_inuse {
 611     my ($name, $address) = @_;
 612
 613     return 1 if (($name eq "") && ($address eq ""));
 614     return 1 if (($name ne "") && exists($email_hash_name{$name}));
 615     return 1 if (($address ne "") && exists($email_hash_address{$address}));
 616
 617     return 0;
 618 }
 619
 620 sub push_email_address {
 621     my ($line) = @_;
 622
 623     my ($name, $address) = parse_email($line);
 624
 625     if ($address eq "") {
 626         return 0;
 627     }
 628
 629     if (!$email_remove_duplicates) {
 630         push(@email_to, format_email($name, $address));
 631     } elsif (!email_inuse($name, $address)) {
 632         push(@email_to, format_email($name, $address));
 633         $email_hash_name{$name}++;
 634         $email_hash_address{$address}++;
 635     }
 636
 637     return 1;
 638 }
 639
 640 sub push_email_addresses {
 641     my ($address) = @_;
 642
 643     my @address_list = ();
 644
 645     if (rfc822_valid($address)) {
 646         push_email_address($address);
 647     } elsif (@address_list = rfc822_validlist($address)) {
 648         my $array_count = shift(@address_list);
 649         while (my $entry = shift(@address_list)) {
 650             push_email_address($entry);
 651         }
 652     } else {
 653         if (!push_email_address($address)) {
 654             warn("Invalid MAINTAINERS address: '" . $address . "'\n");
 655         }
 656     }
 657 }
 658
 659 sub which {
 660     my ($bin) = @_;
 661
 662     foreach my $path (split(/:/, $ENV{PATH})) {
 663         if (-e "$path/$bin") {
 664             return "$path/$bin";
 665         }
 666     }
 667
 668     return "";
 669 }
 670
 671 sub mailmap {
 672     my @lines = @_;
 673     my %hash;
 674
 675     foreach my $line (@lines) {
 676         my ($name, $address) = parse_email($line);
 677         if (!exists($hash{$name})) {
 678             $hash{$name} = $address;
 679         } elsif ($address ne $hash{$name}) {
 680             $address = $hash{$name};
 681             $line = format_email($name, $address);
 682         }
 683         if (exists($mailmap{$name})) {
 684             my $obj = $mailmap{$name};
 685             foreach my $map_address (@$obj) {
 686                 if (($map_address eq $address) &&
 687                     ($map_address ne $hash{$name})) {
 688                     $line = format_email($name, $hash{$name});
 689                 }
 690             }
 691         }
 692     }
 693
 694     return @lines;
 695 }
 696
 697 sub recent_git_signoffs {
 698     my ($file) = @_;
 699
 700     my $sign_offs = "";
 701     my $cmd = "";
 702     my $output = "";
 703     my $count = 0;
 704     my @lines = ();
 705     my %hash;
 706     my $total_sign_offs;
 707
 708     if (which("git") eq "") {
 709         warn("$P: git not found.  Add --nogit to options?\n");
 710         return;
 711     }
 712     if (!(-d ".git")) {
 713         warn("$P: .git directory not found.  Use a git repository for better results.\n");
 714         warn("$P: perhaps 'git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git'\n");
 715         return;
 716     }
 717
 718     $cmd = "git log --since=${email_git_since} -- ${file}";
 719
 720     $output = `${cmd}`;
 721     $output =~ s/^\s*//gm;
 722
 723     @lines = split("\n", $output);
 724
 725     @lines = grep(/^[-_         a-z]+by:.*\@.*$/i, @lines);
 726     if (!$email_git_penguin_chiefs) {
 727         @lines = grep(!/${penguin_chiefs}/i, @lines);
 728     }
 729     # cut -f2- -d":"
 730     s/.*:\s*(.+)\s*/$1/ for (@lines);
 731
 732     $total_sign_offs = @lines;
 733
 734     if ($email_remove_duplicates) {
 735         @lines = mailmap(@lines);
 736     }
 737
 738     @lines = sort(@lines);
 739
 740     # uniq -c
 741     $hash{$_}++ for @lines;
 742
 743     # sort -rn
 744     foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
 745         my $sign_offs = $hash{$line};
 746         $count++;
 747         last if ($sign_offs < $email_git_min_signatures ||
 748                  $count > $email_git_max_maintainers ||
 749                  $sign_offs * 100 / $total_sign_offs < $email_git_min_percent);
 750         push_email_address($line);
 751     }
 752 }
 753
 754 sub save_commits {
 755     my ($cmd, @commits) = @_;
 756     my $output;
 757     my @lines = ();
 758
 759     $output = `${cmd}`;
 760
 761     @lines = split("\n", $output);
 762     foreach my $line (@lines) {
 763         if ($line =~ m/^(\w+) /) {
 764             push (@commits, $1);
 765         }
 766     }
 767     return @commits;
 768 }
 769
 770 sub git_assign_blame {
 771     my ($file) = @_;
 772
 773     my @lines = ();
 774     my @commits = ();
 775     my $cmd;
 776     my $output;
 777     my %hash;
 778     my $total_sign_offs;
 779     my $count;
 780
 781     if (@range) {
 782         foreach my $file_range_diff (@range) {
 783             next if (!($file_range_diff =~ m/(.+):(.+):(.+)/));
 784             my $diff_file = $1;
 785             my $diff_start = $2;
 786             my $diff_length = $3;
 787             next if (!("$file" eq "$diff_file"));
 788             $cmd = "git blame -l -L $diff_start,+$diff_length $file";
 789             @commits = save_commits($cmd, @commits);
 790         }
 791     } else {
 792         if (-f $file) {
 793             $cmd = "git blame -l $file";
 794             @commits = save_commits($cmd, @commits);
 795         }
 796     }
 797
 798     $total_sign_offs = 0;
 799     @commits = uniq(@commits);
 800     foreach my $commit (@commits) {
 801         $cmd = "git log -1 ${commit}";
 802
 803         $output = `${cmd}`;
 804         $output =~ s/^\s*//gm;
 805         @lines = split("\n", $output);
 806
 807         @lines = grep(/^[-_     a-z]+by:.*\@.*$/i, @lines);
 808         if (!$email_git_penguin_chiefs) {
 809             @lines = grep(!/${penguin_chiefs}/i, @lines);
 810         }
 811
 812         # cut -f2- -d":"
 813         s/.*:\s*(.+)\s*/$1/ for (@lines);
 814
 815         $total_sign_offs += @lines;
 816
 817         if ($email_remove_duplicates) {
 818             @lines = mailmap(@lines);
 819         }
 820
 821         $hash{$_}++ for @lines;
 822     }
 823
 824     $count = 0;
 825     foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
 826         my $sign_offs = $hash{$line};
 827         $count++;
 828         last if ($sign_offs < $email_git_min_signatures ||
 829                  $count > $email_git_max_maintainers ||
 830                  $sign_offs * 100 / $total_sign_offs < $email_git_min_percent);
 831         push_email_address($line);
 832     }
 833 }
 834
 835 sub uniq {
 836     my @parms = @_;
 837
 838     my %saw;
 839     @parms = grep(!$saw{$_}++, @parms);
 840     return @parms;
 841 }
 842
 843 sub sort_and_uniq {
 844     my @parms = @_;
 845
 846     my %saw;
 847     @parms = sort @parms;
 848     @parms = grep(!$saw{$_}++, @parms);
 849     return @parms;
 850 }
 851
 852 sub output {
 853     my @parms = @_;
 854
 855     if ($output_multiline) {
 856         foreach my $line (@parms) {
 857             print("${line}\n");
 858         }
 859     } else {
 860         print(join($output_separator, @parms));
 861         print("\n");
 862     }
 863 }
 864
 865 my $rfc822re;
 866
 867 sub make_rfc822re {
 868 #   Basic lexical tokens are specials, domain_literal, quoted_string, atom, and
 869 #   comment.  We must allow for rfc822_lwsp (or comments) after each of these.
 870 #   This regexp will only work on addresses which have had comments stripped
 871 #   and replaced with rfc822_lwsp.
 872
 873     my $specials = '()<>@,;:\\\\".\\[\\]';
 874     my $controls = '\\000-\\037\\177';
 875
 876     my $dtext = "[^\\[\\]\\r\\\\]";
 877     my $domain_literal = "\\[(?:$dtext|\\\\.)*\\]$rfc822_lwsp*";
 878
 879     my $quoted_string = "\"(?:[^\\\"\\r\\\\]|\\\\.|$rfc822_lwsp)*\"$rfc822_lwsp*";
 880
 881 #   Use zero-width assertion to spot the limit of an atom.  A simple
 882 #   $rfc822_lwsp* causes the regexp engine to hang occasionally.
 883     my $atom = "[^$specials $controls]+(?:$rfc822_lwsp+|\\Z|(?=[\\[\"$specials]))";
 884     my $word = "(?:$atom|$quoted_string)";
 885     my $localpart = "$word(?:\\.$rfc822_lwsp*$word)*";
 886
 887     my $sub_domain = "(?:$atom|$domain_literal)";
 888     my $domain = "$sub_domain(?:\\.$rfc822_lwsp*$sub_domain)*";
 889
 890     my $addr_spec = "$localpart\@$rfc822_lwsp*$domain";
 891
 892     my $phrase = "$word*";
 893     my $route = "(?:\@$domain(?:,\@$rfc822_lwsp*$domain)*:$rfc822_lwsp*)";
 894     my $route_addr = "\\<$rfc822_lwsp*$route?$addr_spec\\>$rfc822_lwsp*";
 895     my $mailbox = "(?:$addr_spec|$phrase$route_addr)";
 896
 897     my $group = "$phrase:$rfc822_lwsp*(?:$mailbox(?:,\\s*$mailbox)*)?;\\s*";
 898     my $address = "(?:$mailbox|$group)";
 899
 900     return "$rfc822_lwsp*$address";
 901 }
 902
 903 sub rfc822_strip_comments {
 904     my $s = shift;
 905 #   Recursively remove comments, and replace with a single space.  The simpler
 906 #   regexps in the Email Addressing FAQ are imperfect - they will miss escaped
 907 #   chars in atoms, for example.
 908
 909     while ($s =~ s/^((?:[^"\\]|\\.)*
 910                     (?:"(?:[^"\\]|\\.)*"(?:[^"\\]|\\.)*)*)
 911                     \((?:[^()\\]|\\.)*\)/$1 /osx) {}
 912     return $s;
 913 }
 914
 915 #   valid: returns true if the parameter is an RFC822 valid address
 916 #
 917 sub rfc822_valid ($) {
 918     my $s = rfc822_strip_comments(shift);
 919
 920     if (!$rfc822re) {
 921         $rfc822re = make_rfc822re();
 922     }
 923
 924     return $s =~ m/^$rfc822re$/so && $s =~ m/^$rfc822_char*$/;
 925 }
 926
 927 #   validlist: In scalar context, returns true if the parameter is an RFC822
 928 #              valid list of addresses.
 929 #
 930 #              In list context, returns an empty list on failure (an invalid
 931 #              address was found); otherwise a list whose first element is the
 932 #              number of addresses found and whose remaining elements are the
 933 #              addresses.  This is needed to disambiguate failure (invalid)
 934 #              from success with no addresses found, because an empty string is
 935 #              a valid list.
 936
 937 sub rfc822_validlist ($) {
 938     my $s = rfc822_strip_comments(shift);
 939
 940     if (!$rfc822re) {
 941         $rfc822re = make_rfc822re();
 942     }
 943     # * null list items are valid according to the RFC
 944     # * the '1' business is to aid in distinguishing failure from no results
 945
 946     my @r;
 947     if ($s =~ m/^(?:$rfc822re)?(?:,(?:$rfc822re)?)*$/so &&
 948         $s =~ m/^$rfc822_char*$/) {
 949         while ($s =~ m/(?:^|,$rfc822_lwsp*)($rfc822re)/gos) {
 950             push @r, $1;
 951         }
 952         return wantarray ? (scalar(@r), @r) : 1;
 953     }
 954     else {
 955         return wantarray ? () : 0;
 956     }
 957 }