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 = '0.23';
  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 = 1;
  28 my $email_git_blame = 0;
  29 my $email_git_min_signatures = 1;
  30 my $email_git_max_maintainers = 5;
  31 my $email_git_min_percent = 5;
  32 my $email_git_since = "1-year-ago";
  33 my $email_hg_since = "-365";
  34 my $email_remove_duplicates = 1;
  35 my $output_multiline = 1;
  36 my $output_separator = ", ";
  37 my $output_roles = 0;
  38 my $output_rolestats = 0;
  39 my $scm = 0;
  40 my $web = 0;
  41 my $subsystem = 0;
  42 my $status = 0;
  43 my $keywords = 1;
  44 my $from_filename = 0;
  45 my $pattern_depth = 0;
  46 my $version = 0;
  47 my $help = 0;
  48
  49 my $exit = 0;
  50
  51 my @penguin_chief = ();
  52 push(@penguin_chief,"Linus Torvalds:torvalds\@linux-foundation.org");
  53 #Andrew wants in on most everything - 2009/01/14
  54 #push(@penguin_chief,"Andrew Morton:akpm\@linux-foundation.org");
  55
  56 my @penguin_chief_names = ();
  57 foreach my $chief (@penguin_chief) {
  58     if ($chief =~ m/^(.*):(.*)/) {
  59         my $chief_name = $1;
  60         my $chief_addr = $2;
  61         push(@penguin_chief_names, $chief_name);
  62     }
  63 }
  64 my $penguin_chiefs = "\(" . join("|",@penguin_chief_names) . "\)";
  65
  66 # rfc822 email address - preloaded methods go here.
  67 my $rfc822_lwsp = "(?:(?:\\r\\n)?[ \\t])";
  68 my $rfc822_char = '[\\000-\\377]';
  69
  70 # VCS command support: class-like functions and strings
  71
  72 my %VCS_cmds;
  73
  74 my %VCS_cmds_git = (
  75     "execute_cmd" => \&git_execute_cmd,
  76     "available" => '(which("git") ne "") && (-d ".git")',
  77     "find_signers_cmd" => "git log --since=\$email_git_since -- \$file",
  78     "find_commit_signers_cmd" => "git log -1 \$commit",
  79     "blame_range_cmd" => "git blame -l -L \$diff_start,+\$diff_length \$file",
  80     "blame_file_cmd" => "git blame -l \$file",
  81     "commit_pattern" => "^commit [0-9a-f]{40,40}",
  82     "blame_commit_pattern" => "^([0-9a-f]+) "
  83 );
  84
  85 my %VCS_cmds_hg = (
  86     "execute_cmd" => \&hg_execute_cmd,
  87     "available" => '(which("hg") ne "") && (-d ".hg")',
  88     "find_signers_cmd" =>
  89         "hg log --date=\$email_hg_since" .
  90                 " --template='commit {node}\\n{desc}\\n' -- \$file",
  91     "find_commit_signers_cmd" => "hg log --template='{desc}\\n' -r \$commit",
  92     "blame_range_cmd" => "",            # not supported
  93     "blame_file_cmd" => "hg blame -c \$file",
  94     "commit_pattern" => "^commit [0-9a-f]{40,40}",
  95     "blame_commit_pattern" => "^([0-9a-f]+):"
  96 );
  97
  98 if (!GetOptions(
  99                 'email!' => \$email,
 100                 'git!' => \$email_git,
 101                 'git-blame!' => \$email_git_blame,
 102                 'git-chief-penguins!' => \$email_git_penguin_chiefs,
 103                 'git-min-signatures=i' => \$email_git_min_signatures,
 104                 'git-max-maintainers=i' => \$email_git_max_maintainers,
 105                 'git-min-percent=i' => \$email_git_min_percent,
 106                 'git-since=s' => \$email_git_since,
 107                 'hg-since=s' => \$email_hg_since,
 108                 'remove-duplicates!' => \$email_remove_duplicates,
 109                 'm!' => \$email_maintainer,
 110                 'n!' => \$email_usename,
 111                 'l!' => \$email_list,
 112                 's!' => \$email_subscriber_list,
 113                 'multiline!' => \$output_multiline,
 114                 'roles!' => \$output_roles,
 115                 'rolestats!' => \$output_rolestats,
 116                 'separator=s' => \$output_separator,
 117                 'subsystem!' => \$subsystem,
 118                 'status!' => \$status,
 119                 'scm!' => \$scm,
 120                 'web!' => \$web,
 121                 'pattern-depth=i' => \$pattern_depth,
 122                 'k|keywords!' => \$keywords,
 123                 'f|file' => \$from_filename,
 124                 'v|version' => \$version,
 125                 'h|help' => \$help,
 126                 )) {
 127     die "$P: invalid argument - use --help if necessary\n";
 128 }
 129
 130 if ($help != 0) {
 131     usage();
 132     exit 0;
 133 }
 134
 135 if ($version != 0) {
 136     print("${P} ${V}\n");
 137     exit 0;
 138 }
 139
 140 if ($#ARGV < 0) {
 141     usage();
 142     die "$P: argument missing: patchfile or -f file please\n";
 143 }
 144
 145 if ($output_separator ne ", ") {
 146     $output_multiline = 0;
 147 }
 148
 149 if ($output_rolestats) {
 150     $output_roles = 1;
 151 }
 152
 153 my $selections = $email + $scm + $status + $subsystem + $web;
 154 if ($selections == 0) {
 155     usage();
 156     die "$P:  Missing required option: email, scm, status, subsystem or web\n";
 157 }
 158
 159 if ($email &&
 160     ($email_maintainer + $email_list + $email_subscriber_list +
 161      $email_git + $email_git_penguin_chiefs + $email_git_blame) == 0) {
 162     usage();
 163     die "$P: Please select at least 1 email option\n";
 164 }
 165
 166 if (!top_of_kernel_tree($lk_path)) {
 167     die "$P: The current directory does not appear to be "
 168         . "a linux kernel source tree.\n";
 169 }
 170
 171 ## Read MAINTAINERS for type/value pairs
 172
 173 my @typevalue = ();
 174 my %keyword_hash;
 175
 176 open(MAINT, "<${lk_path}MAINTAINERS") || die "$P: Can't open MAINTAINERS\n";
 177 while (<MAINT>) {
 178     my $line = $_;
 179
 180     if ($line =~ m/^(\C):\s*(.*)/) {
 181         my $type = $1;
 182         my $value = $2;
 183
 184         ##Filename pattern matching
 185         if ($type eq "F" || $type eq "X") {
 186             $value =~ s@\.@\\\.@g;       ##Convert . to \.
 187             $value =~ s/\*/\.\*/g;       ##Convert * to .*
 188             $value =~ s/\?/\./g;         ##Convert ? to .
 189             ##if pattern is a directory and it lacks a trailing slash, add one
 190             if ((-d $value)) {
 191                 $value =~ s@([^/])$@$1/@;
 192             }
 193         } elsif ($type eq "K") {
 194             $keyword_hash{@typevalue} = $value;
 195         }
 196         push(@typevalue, "$type:$value");
 197     } elsif (!/^(\s)*$/) {
 198         $line =~ s/\n$//g;
 199         push(@typevalue, $line);
 200     }
 201 }
 202 close(MAINT);
 203
 204 my %mailmap;
 205
 206 if ($email_remove_duplicates) {
 207     open(MAILMAP, "<${lk_path}.mailmap") || warn "$P: Can't open .mailmap\n";
 208     while (<MAILMAP>) {
 209         my $line = $_;
 210
 211         next if ($line =~ m/^\s*#/);
 212         next if ($line =~ m/^\s*$/);
 213
 214         my ($name, $address) = parse_email($line);
 215         $line = format_email($name, $address, $email_usename);
 216
 217         next if ($line =~ m/^\s*$/);
 218
 219         if (exists($mailmap{$name})) {
 220             my $obj = $mailmap{$name};
 221             push(@$obj, $address);
 222         } else {
 223             my @arr = ($address);
 224             $mailmap{$name} = \@arr;
 225         }
 226     }
 227     close(MAILMAP);
 228 }
 229
 230 ## use the filenames on the command line or find the filenames in the patchfiles
 231
 232 my @files = ();
 233 my @range = ();
 234 my @keyword_tvi = ();
 235
 236 foreach my $file (@ARGV) {
 237     ##if $file is a directory and it lacks a trailing slash, add one
 238     if ((-d $file)) {
 239         $file =~ s@([^/])$@$1/@;
 240     } elsif (!(-f $file)) {
 241         die "$P: file '${file}' not found\n";
 242     }
 243     if ($from_filename) {
 244         push(@files, $file);
 245         if (-f $file && $keywords) {
 246             open(FILE, "<$file") or die "$P: Can't open ${file}\n";
 247             my $text = do { local($/) ; <FILE> };
 248             foreach my $line (keys %keyword_hash) {
 249                 if ($text =~ m/$keyword_hash{$line}/x) {
 250                     push(@keyword_tvi, $line);
 251                 }
 252             }
 253             close(FILE);
 254         }
 255     } else {
 256         my $file_cnt = @files;
 257         my $lastfile;
 258         open(PATCH, "<$file") or die "$P: Can't open ${file}\n";
 259         while (<PATCH>) {
 260             my $patch_line = $_;
 261             if (m/^\+\+\+\s+(\S+)/) {
 262                 my $filename = $1;
 263                 $filename =~ s@^[^/]*/@@;
 264                 $filename =~ s@\n@@;
 265                 $lastfile = $filename;
 266                 push(@files, $filename);
 267             } elsif (m/^\@\@ -(\d+),(\d+)/) {
 268                 if ($email_git_blame) {
 269                     push(@range, "$lastfile:$1:$2");
 270                 }
 271             } elsif ($keywords) {
 272                 foreach my $line (keys %keyword_hash) {
 273                     if ($patch_line =~ m/^[+-].*$keyword_hash{$line}/x) {
 274                         push(@keyword_tvi, $line);
 275                     }
 276                 }
 277             }
 278         }
 279         close(PATCH);
 280         if ($file_cnt == @files) {
 281             warn "$P: file '${file}' doesn't appear to be a patch.  "
 282                 . "Add -f to options?\n";
 283         }
 284         @files = sort_and_uniq(@files);
 285     }
 286 }
 287
 288 my @email_to = ();
 289 my @list_to = ();
 290 my @scm = ();
 291 my @web = ();
 292 my @subsystem = ();
 293 my @status = ();
 294
 295 # Find responsible parties
 296
 297 foreach my $file (@files) {
 298
 299     my %hash;
 300     my $tvi = find_first_section();
 301     while ($tvi < @typevalue) {
 302         my $start = find_starting_index($tvi);
 303         my $end = find_ending_index($tvi);
 304         my $exclude = 0;
 305         my $i;
 306
 307         #Do not match excluded file patterns
 308
 309         for ($i = $start; $i < $end; $i++) {
 310             my $line = $typevalue[$i];
 311             if ($line =~ m/^(\C):\s*(.*)/) {
 312                 my $type = $1;
 313                 my $value = $2;
 314                 if ($type eq 'X') {
 315                     if (file_match_pattern($file, $value)) {
 316                         $exclude = 1;
 317                     }
 318                 }
 319             }
 320         }
 321
 322         if (!$exclude) {
 323             for ($i = $start; $i < $end; $i++) {
 324                 my $line = $typevalue[$i];
 325                 if ($line =~ m/^(\C):\s*(.*)/) {
 326                     my $type = $1;
 327                     my $value = $2;
 328                     if ($type eq 'F') {
 329                         if (file_match_pattern($file, $value)) {
 330                             my $value_pd = ($value =~ tr@/@@);
 331                             my $file_pd = ($file  =~ tr@/@@);
 332                             $value_pd++ if (substr($value,-1,1) ne "/");
 333                             if ($pattern_depth == 0 ||
 334                                 (($file_pd - $value_pd) < $pattern_depth)) {
 335                                 $hash{$tvi} = $value_pd;
 336                             }
 337                         }
 338                     }
 339                 }
 340             }
 341         }
 342
 343         $tvi += ($end - $start);
 344
 345     }
 346
 347     foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
 348         add_categories($line);
 349     }
 350
 351     if ($email && $email_git) {
 352         vcs_file_signoffs($file);
 353     }
 354
 355     if ($email && $email_git_blame) {
 356         vcs_file_blame($file);
 357     }
 358 }
 359
 360 if ($keywords) {
 361     @keyword_tvi = sort_and_uniq(@keyword_tvi);
 362     foreach my $line (@keyword_tvi) {
 363         add_categories($line);
 364     }
 365 }
 366
 367 if ($email) {
 368     foreach my $chief (@penguin_chief) {
 369         if ($chief =~ m/^(.*):(.*)/) {
 370             my $email_address;
 371
 372             $email_address = format_email($1, $2, $email_usename);
 373             if ($email_git_penguin_chiefs) {
 374                 push(@email_to, [$email_address, 'chief penguin']);
 375             } else {
 376                 @email_to = grep($_->[0] !~ /${email_address}/, @email_to);
 377             }
 378         }
 379     }
 380 }
 381
 382 if ($email || $email_list) {
 383     my @to = ();
 384     if ($email) {
 385         @to = (@to, @email_to);
 386     }
 387     if ($email_list) {
 388         @to = (@to, @list_to);
 389     }
 390     output(merge_email(@to));
 391 }
 392
 393 if ($scm) {
 394     @scm = uniq(@scm);
 395     output(@scm);
 396 }
 397
 398 if ($status) {
 399     @status = uniq(@status);
 400     output(@status);
 401 }
 402
 403 if ($subsystem) {
 404     @subsystem = uniq(@subsystem);
 405     output(@subsystem);
 406 }
 407
 408 if ($web) {
 409     @web = uniq(@web);
 410     output(@web);
 411 }
 412
 413 exit($exit);
 414
 415 sub file_match_pattern {
 416     my ($file, $pattern) = @_;
 417     if (substr($pattern, -1) eq "/") {
 418         if ($file =~ m@^$pattern@) {
 419             return 1;
 420         }
 421     } else {
 422         if ($file =~ m@^$pattern@) {
 423             my $s1 = ($file =~ tr@/@@);
 424             my $s2 = ($pattern =~ tr@/@@);
 425             if ($s1 == $s2) {
 426                 return 1;
 427             }
 428         }
 429     }
 430     return 0;
 431 }
 432
 433 sub usage {
 434     print <<EOT;
 435 usage: $P [options] patchfile
 436        $P [options] -f file|directory
 437 version: $V
 438
 439 MAINTAINER field selection options:
 440   --email => print email address(es) if any
 441     --git => include recent git \*-by: signers
 442     --git-chief-penguins => include ${penguin_chiefs}
 443     --git-min-signatures => number of signatures required (default: 1)
 444     --git-max-maintainers => maximum maintainers to add (default: 5)
 445     --git-min-percent => minimum percentage of commits required (default: 5)
 446     --git-blame => use git blame to find modified commits for patch or file
 447     --git-since => git history to use (default: 1-year-ago)
 448     --hg-since => hg history to use (default: -365)
 449     --m => include maintainer(s) if any
 450     --n => include name 'Full Name <addr\@domain.tld>'
 451     --l => include list(s) if any
 452     --s => include subscriber only list(s) if any
 453     --remove-duplicates => minimize duplicate email names/addresses
 454     --roles => show roles (status:subsystem, git-signer, list, etc...)
 455     --rolestats => show roles and statistics (commits/total_commits, %)
 456   --scm => print SCM tree(s) if any
 457   --status => print status if any
 458   --subsystem => print subsystem name if any
 459   --web => print website(s) if any
 460
 461 Output type options:
 462   --separator [, ] => separator for multiple entries on 1 line
 463     using --separator also sets --nomultiline if --separator is not [, ]
 464   --multiline => print 1 entry per line
 465
 466 Other options:
 467   --pattern-depth => Number of pattern directory traversals (default: 0 (all))
 468   --keywords => scan patch for keywords (default: 1 (on))
 469   --version => show version
 470   --help => show this help information
 471
 472 Default options:
 473   [--email --git --m --n --l --multiline --pattern-depth=0 --remove-duplicates]
 474
 475 Notes:
 476   Using "-f directory" may give unexpected results:
 477       Used with "--git", git signators for _all_ files in and below
 478           directory are examined as git recurses directories.
 479           Any specified X: (exclude) pattern matches are _not_ ignored.
 480       Used with "--nogit", directory is used as a pattern match,
 481           no individual file within the directory or subdirectory
 482           is matched.
 483       Used with "--git-blame", does not iterate all files in directory
 484   Using "--git-blame" is slow and may add old committers and authors
 485       that are no longer active maintainers to the output.
 486   Using "--roles" or "--rolestats" with git send-email --cc-cmd or any
 487       other automated tools that expect only ["name"] <email address>
 488       may not work because of additional output after <email address>.
 489   Using "--rolestats" and "--git-blame" shows the #/total=% commits,
 490       not the percentage of the entire file authored.  # of commits is
 491       not a good measure of amount of code authored.  1 major commit may
 492       contain a thousand lines, 5 trivial commits may modify a single line.
 493   If git is not installed, but mercurial (hg) is installed and an .hg
 494       repository exists, the following options apply to mercurial:
 495           --git,
 496           --git-min-signatures, --git-max-maintainers, --git-min-percent, and
 497           --git-blame
 498       Use --hg-since not --git-since to control date selection
 499 EOT
 500 }
 501
 502 sub top_of_kernel_tree {
 503         my ($lk_path) = @_;
 504
 505         if ($lk_path ne "" && substr($lk_path,length($lk_path)-1,1) ne "/") {
 506             $lk_path .= "/";
 507         }
 508         if (   (-f "${lk_path}COPYING")
 509             && (-f "${lk_path}CREDITS")
 510             && (-f "${lk_path}Kbuild")
 511             && (-f "${lk_path}MAINTAINERS")
 512             && (-f "${lk_path}Makefile")
 513             && (-f "${lk_path}README")
 514             && (-d "${lk_path}Documentation")
 515             && (-d "${lk_path}arch")
 516             && (-d "${lk_path}include")
 517             && (-d "${lk_path}drivers")
 518             && (-d "${lk_path}fs")
 519             && (-d "${lk_path}init")
 520             && (-d "${lk_path}ipc")
 521             && (-d "${lk_path}kernel")
 522             && (-d "${lk_path}lib")
 523             && (-d "${lk_path}scripts")) {
 524                 return 1;
 525         }
 526         return 0;
 527 }
 528
 529 sub parse_email {
 530     my ($formatted_email) = @_;
 531
 532     my $name = "";
 533     my $address = "";
 534
 535     if ($formatted_email =~ /^([^<]+)<(.+\@.*)>.*$/) {
 536         $name = $1;
 537         $address = $2;
 538     } elsif ($formatted_email =~ /^\s*<(.+\@\S*)>.*$/) {
 539         $address = $1;
 540     } elsif ($formatted_email =~ /^(.+\@\S*).*$/) {
 541         $address = $1;
 542     }
 543
 544     $name =~ s/^\s+|\s+$//g;
 545     $name =~ s/^\"|\"$//g;
 546     $address =~ s/^\s+|\s+$//g;
 547
 548     if ($name =~ /[^a-z0-9 \.\-]/i) {    ##has "must quote" chars
 549         $name =~ s/(?<!\\)"/\\"/g;       ##escape quotes
 550         $name = "\"$name\"";
 551     }
 552
 553     return ($name, $address);
 554 }
 555
 556 sub format_email {
 557     my ($name, $address, $usename) = @_;
 558
 559     my $formatted_email;
 560
 561     $name =~ s/^\s+|\s+$//g;
 562     $name =~ s/^\"|\"$//g;
 563     $address =~ s/^\s+|\s+$//g;
 564
 565     if ($name =~ /[^a-z0-9 \.\-]/i) {    ##has "must quote" chars
 566         $name =~ s/(?<!\\)"/\\"/g;       ##escape quotes
 567         $name = "\"$name\"";
 568     }
 569
 570     if ($usename) {
 571         if ("$name" eq "") {
 572             $formatted_email = "$address";
 573         } else {
 574             $formatted_email = "$name <$address>";
 575         }
 576     } else {
 577         $formatted_email = $address;
 578     }
 579
 580     return $formatted_email;
 581 }
 582
 583 sub find_first_section {
 584     my $index = 0;
 585
 586     while ($index < @typevalue) {
 587         my $tv = $typevalue[$index];
 588         if (($tv =~ m/^(\C):\s*(.*)/)) {
 589             last;
 590         }
 591         $index++;
 592     }
 593
 594     return $index;
 595 }
 596
 597 sub find_starting_index {
 598     my ($index) = @_;
 599
 600     while ($index > 0) {
 601         my $tv = $typevalue[$index];
 602         if (!($tv =~ m/^(\C):\s*(.*)/)) {
 603             last;
 604         }
 605         $index--;
 606     }
 607
 608     return $index;
 609 }
 610
 611 sub find_ending_index {
 612     my ($index) = @_;
 613
 614     while ($index < @typevalue) {
 615         my $tv = $typevalue[$index];
 616         if (!($tv =~ m/^(\C):\s*(.*)/)) {
 617             last;
 618         }
 619         $index++;
 620     }
 621
 622     return $index;
 623 }
 624
 625 sub get_maintainer_role {
 626     my ($index) = @_;
 627
 628     my $i;
 629     my $start = find_starting_index($index);
 630     my $end = find_ending_index($index);
 631
 632     my $role;
 633     my $subsystem = $typevalue[$start];
 634     if (length($subsystem) > 20) {
 635         $subsystem = substr($subsystem, 0, 17);
 636         $subsystem =~ s/\s*$//;
 637         $subsystem = $subsystem . "...";
 638     }
 639
 640     for ($i = $start + 1; $i < $end; $i++) {
 641         my $tv = $typevalue[$i];
 642         if ($tv =~ m/^(\C):\s*(.*)/) {
 643             my $ptype = $1;
 644             my $pvalue = $2;
 645             if ($ptype eq "S") {
 646                 $role = $pvalue;
 647             }
 648         }
 649     }
 650
 651     $role = lc($role);
 652     if      ($role eq "supported") {
 653         $role = "supporter";
 654     } elsif ($role eq "maintained") {
 655         $role = "maintainer";
 656     } elsif ($role eq "odd fixes") {
 657         $role = "odd fixer";
 658     } elsif ($role eq "orphan") {
 659         $role = "orphan minder";
 660     } elsif ($role eq "obsolete") {
 661         $role = "obsolete minder";
 662     } elsif ($role eq "buried alive in reporters") {
 663         $role = "chief penguin";
 664     }
 665
 666     return $role . ":" . $subsystem;
 667 }
 668
 669 sub get_list_role {
 670     my ($index) = @_;
 671
 672     my $i;
 673     my $start = find_starting_index($index);
 674     my $end = find_ending_index($index);
 675
 676     my $subsystem = $typevalue[$start];
 677     if (length($subsystem) > 20) {
 678         $subsystem = substr($subsystem, 0, 17);
 679         $subsystem =~ s/\s*$//;
 680         $subsystem = $subsystem . "...";
 681     }
 682
 683     if ($subsystem eq "THE REST") {
 684         $subsystem = "";
 685     }
 686
 687     return $subsystem;
 688 }
 689
 690 sub add_categories {
 691     my ($index) = @_;
 692
 693     my $i;
 694     my $start = find_starting_index($index);
 695     my $end = find_ending_index($index);
 696
 697     push(@subsystem, $typevalue[$start]);
 698
 699     for ($i = $start + 1; $i < $end; $i++) {
 700         my $tv = $typevalue[$i];
 701         if ($tv =~ m/^(\C):\s*(.*)/) {
 702             my $ptype = $1;
 703             my $pvalue = $2;
 704             if ($ptype eq "L") {
 705                 my $list_address = $pvalue;
 706                 my $list_additional = "";
 707                 my $list_role = get_list_role($i);
 708
 709                 if ($list_role ne "") {
 710                     $list_role = ":" . $list_role;
 711                 }
 712                 if ($list_address =~ m/([^\s]+)\s+(.*)$/) {
 713                     $list_address = $1;
 714                     $list_additional = $2;
 715                 }
 716                 if ($list_additional =~ m/subscribers-only/) {
 717                     if ($email_subscriber_list) {
 718                         push(@list_to, [$list_address, "subscriber list${list_role}"]);
 719                     }
 720                 } else {
 721                     if ($email_list) {
 722                         push(@list_to, [$list_address, "open list${list_role}"]);
 723                     }
 724                 }
 725             } elsif ($ptype eq "M") {
 726                 my ($name, $address) = parse_email($pvalue);
 727                 if ($name eq "") {
 728                     if ($i > 0) {
 729                         my $tv = $typevalue[$i - 1];
 730                         if ($tv =~ m/^(\C):\s*(.*)/) {
 731                             if ($1 eq "P") {
 732                                 $name = $2;
 733                                 $pvalue = format_email($name, $address, $email_usename);
 734                             }
 735                         }
 736                     }
 737                 }
 738                 if ($email_maintainer) {
 739                     my $role = get_maintainer_role($i);
 740                     push_email_addresses($pvalue, $role);
 741                 }
 742             } elsif ($ptype eq "T") {
 743                 push(@scm, $pvalue);
 744             } elsif ($ptype eq "W") {
 745                 push(@web, $pvalue);
 746             } elsif ($ptype eq "S") {
 747                 push(@status, $pvalue);
 748             }
 749         }
 750     }
 751 }
 752
 753 my %email_hash_name;
 754 my %email_hash_address;
 755
 756 sub email_inuse {
 757     my ($name, $address) = @_;
 758
 759     return 1 if (($name eq "") && ($address eq ""));
 760     return 1 if (($name ne "") && exists($email_hash_name{$name}));
 761     return 1 if (($address ne "") && exists($email_hash_address{$address}));
 762
 763     return 0;
 764 }
 765
 766 sub push_email_address {
 767     my ($line, $role) = @_;
 768
 769     my ($name, $address) = parse_email($line);
 770
 771     if ($address eq "") {
 772         return 0;
 773     }
 774
 775     if (!$email_remove_duplicates) {
 776         push(@email_to, [format_email($name, $address, $email_usename), $role]);
 777     } elsif (!email_inuse($name, $address)) {
 778         push(@email_to, [format_email($name, $address, $email_usename), $role]);
 779         $email_hash_name{$name}++;
 780         $email_hash_address{$address}++;
 781     }
 782
 783     return 1;
 784 }
 785
 786 sub push_email_addresses {
 787     my ($address, $role) = @_;
 788
 789     my @address_list = ();
 790
 791     if (rfc822_valid($address)) {
 792         push_email_address($address, $role);
 793     } elsif (@address_list = rfc822_validlist($address)) {
 794         my $array_count = shift(@address_list);
 795         while (my $entry = shift(@address_list)) {
 796             push_email_address($entry, $role);
 797         }
 798     } else {
 799         if (!push_email_address($address, $role)) {
 800             warn("Invalid MAINTAINERS address: '" . $address . "'\n");
 801         }
 802     }
 803 }
 804
 805 sub add_role {
 806     my ($line, $role) = @_;
 807
 808     my ($name, $address) = parse_email($line);
 809     my $email = format_email($name, $address, $email_usename);
 810
 811     foreach my $entry (@email_to) {
 812         if ($email_remove_duplicates) {
 813             my ($entry_name, $entry_address) = parse_email($entry->[0]);
 814             if ($name eq $entry_name || $address eq $entry_address) {
 815                 if ($entry->[1] eq "") {
 816                     $entry->[1] = "$role";
 817                 } else {
 818                     $entry->[1] = "$entry->[1],$role";
 819                 }
 820             }
 821         } else {
 822             if ($email eq $entry->[0]) {
 823                 if ($entry->[1] eq "") {
 824                     $entry->[1] = "$role";
 825                 } else {
 826                     $entry->[1] = "$entry->[1],$role";
 827                 }
 828             }
 829         }
 830     }
 831 }
 832
 833 sub which {
 834     my ($bin) = @_;
 835
 836     foreach my $path (split(/:/, $ENV{PATH})) {
 837         if (-e "$path/$bin") {
 838             return "$path/$bin";
 839         }
 840     }
 841
 842     return "";
 843 }
 844
 845 sub mailmap {
 846     my (@lines) = @_;
 847     my %hash;
 848
 849     foreach my $line (@lines) {
 850         my ($name, $address) = parse_email($line);
 851         if (!exists($hash{$name})) {
 852             $hash{$name} = $address;
 853         } elsif ($address ne $hash{$name}) {
 854             $address = $hash{$name};
 855             $line = format_email($name, $address, $email_usename);
 856         }
 857         if (exists($mailmap{$name})) {
 858             my $obj = $mailmap{$name};
 859             foreach my $map_address (@$obj) {
 860                 if (($map_address eq $address) &&
 861                     ($map_address ne $hash{$name})) {
 862                     $line = format_email($name, $hash{$name}, $email_usename);
 863                 }
 864             }
 865         }
 866     }
 867
 868     return @lines;
 869 }
 870
 871 sub git_execute_cmd {
 872     my ($cmd) = @_;
 873     my @lines = ();
 874
 875     my $output = `$cmd`;
 876     $output =~ s/^\s*//gm;
 877     @lines = split("\n", $output);
 878
 879     return @lines;
 880 }
 881
 882 sub hg_execute_cmd {
 883     my ($cmd) = @_;
 884     my @lines = ();
 885
 886     my $output = `$cmd`;
 887     @lines = split("\n", $output);
 888
 889     return @lines;
 890 }
 891
 892 sub vcs_find_signers {
 893     my ($cmd) = @_;
 894     my @lines = ();
 895     my $commits;
 896
 897     @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
 898
 899     my $pattern = $VCS_cmds{"commit_pattern"};
 900
 901     $commits = grep(/$pattern/, @lines);        # of commits
 902
 903     @lines = grep(/^[-_         a-z]+by:.*\@.*$/i, @lines);
 904     if (!$email_git_penguin_chiefs) {
 905         @lines = grep(!/${penguin_chiefs}/i, @lines);
 906     }
 907     # cut -f2- -d":"
 908     s/.*:\s*(.+)\s*/$1/ for (@lines);
 909
 910 ## Reformat email addresses (with names) to avoid badly written signatures
 911
 912     foreach my $line (@lines) {
 913         my ($name, $address) = parse_email($line);
 914         $line = format_email($name, $address, 1);
 915     }
 916
 917     return ($commits, @lines);
 918 }
 919
 920 sub vcs_save_commits {
 921     my ($cmd) = @_;
 922     my @lines = ();
 923     my @commits = ();
 924
 925     @lines = &{$VCS_cmds{"execute_cmd"}}($cmd);
 926
 927     foreach my $line (@lines) {
 928         if ($line =~ m/$VCS_cmds{"blame_commit_pattern"}/) {
 929             push(@commits, $1);
 930         }
 931     }
 932
 933     return @commits;
 934 }
 935
 936 sub vcs_blame {
 937     my ($file) = @_;
 938     my $cmd;
 939     my @commits = ();
 940
 941     return @commits if (!(-f $file));
 942
 943     if (@range && $VCS_cmds{"blame_range_cmd"} eq "") {
 944         my @all_commits = ();
 945
 946         $cmd = $VCS_cmds{"blame_file_cmd"};
 947         $cmd =~ s/(\$\w+)/$1/eeg;               #interpolate $cmd
 948         @all_commits = vcs_save_commits($cmd);
 949
 950         foreach my $file_range_diff (@range) {
 951             next if (!($file_range_diff =~ m/(.+):(.+):(.+)/));
 952             my $diff_file = $1;
 953             my $diff_start = $2;
 954             my $diff_length = $3;
 955             next if ("$file" ne "$diff_file");
 956             for (my $i = $diff_start; $i < $diff_start + $diff_length; $i++) {
 957                 push(@commits, $all_commits[$i]);
 958             }
 959         }
 960     } elsif (@range) {
 961         foreach my $file_range_diff (@range) {
 962             next if (!($file_range_diff =~ m/(.+):(.+):(.+)/));
 963             my $diff_file = $1;
 964             my $diff_start = $2;
 965             my $diff_length = $3;
 966             next if ("$file" ne "$diff_file");
 967             $cmd = $VCS_cmds{"blame_range_cmd"};
 968             $cmd =~ s/(\$\w+)/$1/eeg;           #interpolate $cmd
 969             push(@commits, vcs_save_commits($cmd));
 970         }
 971     } else {
 972         $cmd = $VCS_cmds{"blame_file_cmd"};
 973         $cmd =~ s/(\$\w+)/$1/eeg;               #interpolate $cmd
 974         @commits = vcs_save_commits($cmd);
 975     }
 976
 977     return @commits;
 978 }
 979
 980 my $printed_novcs = 0;
 981 sub vcs_exists {
 982     %VCS_cmds = %VCS_cmds_git;
 983     return 1 if eval $VCS_cmds{"available"};
 984     %VCS_cmds = %VCS_cmds_hg;
 985     return 1 if eval $VCS_cmds{"available"};
 986     %VCS_cmds = ();
 987     if (!$printed_novcs) {
 988         warn("$P: No supported VCS found.  Add --nogit to options?\n");
 989         warn("Using a git repository produces better results.\n");
 990         warn("Try Linus Torvalds' latest git repository using:\n");
 991         warn("git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git\n");
 992         $printed_novcs = 1;
 993     }
 994     return 0;
 995 }
 996
 997 sub vcs_assign {
 998     my ($role, $divisor, @lines) = @_;
 999
1000     my %hash;
1001     my $count = 0;
1002
1003     return if (@lines <= 0);
1004
1005     if ($divisor <= 0) {
1006         warn("Bad divisor in " . (caller(0))[3] . ": $divisor\n");
1007         $divisor = 1;
1008     }
1009
1010     if ($email_remove_duplicates) {
1011         @lines = mailmap(@lines);
1012     }
1013
1014     @lines = sort(@lines);
1015
1016     # uniq -c
1017     $hash{$_}++ for @lines;
1018
1019     # sort -rn
1020     foreach my $line (sort {$hash{$b} <=> $hash{$a}} keys %hash) {
1021         my $sign_offs = $hash{$line};
1022         my $percent = $sign_offs * 100 / $divisor;
1023
1024         $percent = 100 if ($percent > 100);
1025         $count++;
1026         last if ($sign_offs < $email_git_min_signatures ||
1027                  $count > $email_git_max_maintainers ||
1028                  $percent < $email_git_min_percent);
1029         push_email_address($line, '');
1030         if ($output_rolestats) {
1031             my $fmt_percent = sprintf("%.0f", $percent);
1032             add_role($line, "$role:$sign_offs/$divisor=$fmt_percent%");
1033         } else {
1034             add_role($line, $role);
1035         }
1036     }
1037 }
1038
1039 sub vcs_file_signoffs {
1040     my ($file) = @_;
1041
1042     my @signers = ();
1043     my $commits;
1044
1045     return if (!vcs_exists());
1046
1047     my $cmd = $VCS_cmds{"find_signers_cmd"};
1048     $cmd =~ s/(\$\w+)/$1/eeg;           # interpolate $cmd
1049
1050     ($commits, @signers) = vcs_find_signers($cmd);
1051     vcs_assign("commit_signer", $commits, @signers);
1052 }
1053
1054 sub vcs_file_blame {
1055     my ($file) = @_;
1056
1057     my @signers = ();
1058     my @commits = ();
1059     my $total_commits;
1060
1061     return if (!vcs_exists());
1062
1063     @commits = vcs_blame($file);
1064     @commits = uniq(@commits);
1065     $total_commits = @commits;
1066
1067     foreach my $commit (@commits) {
1068         my $commit_count;
1069         my @commit_signers = ();
1070
1071         my $cmd = $VCS_cmds{"find_commit_signers_cmd"};
1072         $cmd =~ s/(\$\w+)/$1/eeg;       #interpolate $cmd
1073
1074         ($commit_count, @commit_signers) = vcs_find_signers($cmd);
1075         push(@signers, @commit_signers);
1076     }
1077
1078     if ($from_filename) {
1079         vcs_assign("commits", $total_commits, @signers);
1080     } else {
1081         vcs_assign("modified commits", $total_commits, @signers);
1082     }
1083 }
1084
1085 sub uniq {
1086     my (@parms) = @_;
1087
1088     my %saw;
1089     @parms = grep(!$saw{$_}++, @parms);
1090     return @parms;
1091 }
1092
1093 sub sort_and_uniq {
1094     my (@parms) = @_;
1095
1096     my %saw;
1097     @parms = sort @parms;
1098     @parms = grep(!$saw{$_}++, @parms);
1099     return @parms;
1100 }
1101
1102 sub merge_email {
1103     my @lines;
1104     my %saw;
1105
1106     for (@_) {
1107         my ($address, $role) = @$_;
1108         if (!$saw{$address}) {
1109             if ($output_roles) {
1110                 push(@lines, "$address ($role)");
1111             } else {
1112                 push(@lines, $address);
1113             }
1114             $saw{$address} = 1;
1115         }
1116     }
1117
1118     return @lines;
1119 }
1120
1121 sub output {
1122     my (@parms) = @_;
1123
1124     if ($output_multiline) {
1125         foreach my $line (@parms) {
1126             print("${line}\n");
1127         }
1128     } else {
1129         print(join($output_separator, @parms));
1130         print("\n");
1131     }
1132 }
1133
1134 my $rfc822re;
1135
1136 sub make_rfc822re {
1137 #   Basic lexical tokens are specials, domain_literal, quoted_string, atom, and
1138 #   comment.  We must allow for rfc822_lwsp (or comments) after each of these.
1139 #   This regexp will only work on addresses which have had comments stripped
1140 #   and replaced with rfc822_lwsp.
1141
1142     my $specials = '()<>@,;:\\\\".\\[\\]';
1143     my $controls = '\\000-\\037\\177';
1144
1145     my $dtext = "[^\\[\\]\\r\\\\]";
1146     my $domain_literal = "\\[(?:$dtext|\\\\.)*\\]$rfc822_lwsp*";
1147
1148     my $quoted_string = "\"(?:[^\\\"\\r\\\\]|\\\\.|$rfc822_lwsp)*\"$rfc822_lwsp*";
1149
1150 #   Use zero-width assertion to spot the limit of an atom.  A simple
1151 #   $rfc822_lwsp* causes the regexp engine to hang occasionally.
1152     my $atom = "[^$specials $controls]+(?:$rfc822_lwsp+|\\Z|(?=[\\[\"$specials]))";
1153     my $word = "(?:$atom|$quoted_string)";
1154     my $localpart = "$word(?:\\.$rfc822_lwsp*$word)*";
1155
1156     my $sub_domain = "(?:$atom|$domain_literal)";
1157     my $domain = "$sub_domain(?:\\.$rfc822_lwsp*$sub_domain)*";
1158
1159     my $addr_spec = "$localpart\@$rfc822_lwsp*$domain";
1160
1161     my $phrase = "$word*";
1162     my $route = "(?:\@$domain(?:,\@$rfc822_lwsp*$domain)*:$rfc822_lwsp*)";
1163     my $route_addr = "\\<$rfc822_lwsp*$route?$addr_spec\\>$rfc822_lwsp*";
1164     my $mailbox = "(?:$addr_spec|$phrase$route_addr)";
1165
1166     my $group = "$phrase:$rfc822_lwsp*(?:$mailbox(?:,\\s*$mailbox)*)?;\\s*";
1167     my $address = "(?:$mailbox|$group)";
1168
1169     return "$rfc822_lwsp*$address";
1170 }
1171
1172 sub rfc822_strip_comments {
1173     my $s = shift;
1174 #   Recursively remove comments, and replace with a single space.  The simpler
1175 #   regexps in the Email Addressing FAQ are imperfect - they will miss escaped
1176 #   chars in atoms, for example.
1177
1178     while ($s =~ s/^((?:[^"\\]|\\.)*
1179                     (?:"(?:[^"\\]|\\.)*"(?:[^"\\]|\\.)*)*)
1180                     \((?:[^()\\]|\\.)*\)/$1 /osx) {}
1181     return $s;
1182 }
1183
1184 #   valid: returns true if the parameter is an RFC822 valid address
1185 #
1186 sub rfc822_valid ($) {
1187     my $s = rfc822_strip_comments(shift);
1188
1189     if (!$rfc822re) {
1190         $rfc822re = make_rfc822re();
1191     }
1192
1193     return $s =~ m/^$rfc822re$/so && $s =~ m/^$rfc822_char*$/;
1194 }
1195
1196 #   validlist: In scalar context, returns true if the parameter is an RFC822
1197 #              valid list of addresses.
1198 #
1199 #              In list context, returns an empty list on failure (an invalid
1200 #              address was found); otherwise a list whose first element is the
1201 #              number of addresses found and whose remaining elements are the
1202 #              addresses.  This is needed to disambiguate failure (invalid)
1203 #              from success with no addresses found, because an empty string is
1204 #              a valid list.
1205
1206 sub rfc822_validlist ($) {
1207     my $s = rfc822_strip_comments(shift);
1208
1209     if (!$rfc822re) {
1210         $rfc822re = make_rfc822re();
1211     }
1212     # * null list items are valid according to the RFC
1213     # * the '1' business is to aid in distinguishing failure from no results
1214
1215     my @r;
1216     if ($s =~ m/^(?:$rfc822re)?(?:,(?:$rfc822re)?)*$/so &&
1217         $s =~ m/^$rfc822_char*$/) {
1218         while ($s =~ m/(?:^|,$rfc822_lwsp*)($rfc822re)/gos) {
1219             push(@r, $1);
1220         }
1221         return wantarray ? (scalar(@r), @r) : 1;
1222     }
1223     return wantarray ? () : 0;
1224 }