util/scripts/parse-maintainers.pl

   1 #!/usr/bin/env perl
   2 # SPDX-License-Identifier: GPL-2.0-only
   3
   4 use strict;
   5 use warnings;
   6
   7 my %map;
   8
   9 # sort comparison function
  10 sub by_category($$) {
  11     my ($a, $b) = @_;
  12
  13     $a = uc $a;
  14     $b = uc $b;
  15
  16     # This always sorts last
  17     $a =~ s/THE REST/ZZZZZZ/g;
  18     $b =~ s/THE REST/ZZZZZZ/g;
  19
  20     $a cmp $b;
  21 }
  22
  23 sub alpha_output {
  24     my $key;
  25     my $sort_method = \&by_category;
  26     my $sep = "";
  27
  28     foreach $key (sort $sort_method keys %map) {
  29         if ($key ne " ") {
  30             print $sep . $key . "\n";
  31             $sep = "\n";
  32         }
  33         print $map{$key};
  34     }
  35 }
  36
  37 sub trim {
  38     my $s = shift;
  39     $s =~ s/\s+$//;
  40     $s =~ s/^\s+//;
  41     return $s;
  42 }
  43
  44 sub file_input {
  45     my $lastline = "";
  46     my $case = " ";
  47     $map{$case} = "";
  48
  49     while (<>) {
  50         my $line = $_;
  51
  52         # Pattern line?
  53         if ($line =~ m/^([A-Z]):\s*(.*)/) {
  54             $line = $1 . ":\t" . trim($2) . "\n";
  55             if ($lastline eq "") {
  56                 $map{$case} = $map{$case} . $line;
  57                 next;
  58             }
  59             $case = trim($lastline);
  60             exists $map{$case} and die "Header '$case' already exists";
  61             $map{$case} = $line;
  62             $lastline = "";
  63             next;
  64         }
  65
  66         if ($case eq " ") {
  67             $map{$case} = $map{$case} . $lastline;
  68             $lastline = $line;
  69             next;
  70         }
  71         trim($lastline) eq "" or die ("Odd non-pattern line '$lastline' for '$case'");
  72         $lastline = $line;
  73     }
  74     $map{$case} = $map{$case} . $lastline;
  75 }
  76
  77 &file_input;
  78 &alpha_output;
  79 exit(0);