Documentation/build-docdep.perl

   1 #!/usr/bin/perl
   2
   3 my %include = ();
   4 my %included = ();
   5
   6 for my $text (<*.txt>) {
   7     open I, '<', $text || die "cannot read: $text";
   8     while (<I>) {
   9         if (/^include::/) {
  10             chomp;
  11             s/^include::\s*//;
  12             s/\[\]//;
  13             $include{$text}{$_} = 1;
  14             $included{$_} = 1;
  15         }
  16     }
  17     close I;
  18 }
  19
  20 # Do we care about chained includes???
  21 my $changed = 1;
  22 while ($changed) {
  23     $changed = 0;
  24     while (my ($text, $included) = each %include) {
  25         for my $i (keys %$included) {
  26             # $text has include::$i; if $i includes $j
  27             # $text indirectly includes $j.
  28             if (exists $include{$i}) {
  29                 for my $j (keys %{$include{$i}}) {
  30                     if (!exists $include{$text}{$j}) {
  31                         $include{$text}{$j} = 1;
  32                         $included{$j} = 1;
  33                         $changed = 1;
  34                     }
  35                 }
  36             }
  37         }
  38     }
  39 }
  40
  41 while (my ($text, $included) = each %include) {
  42     if (! exists $included{$text} &&
  43         (my $base = $text) =~ s/\.txt$//) {
  44         print "$base.html $base.xml : ", join(" ", keys %$included), "\n";
  45     }
  46 }