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  1. #! /usr/bin/env perl
  2.  
  3. # This script will print the dependency of a Texinfo file to stdout.
  4. # texidep.pl <src-path> <input.texi> <output.ext>
  5.  
  6. use warnings;
  7. use strict;
  8.  
  9. die unless @ARGV == 3;
  10.  
  11. my ($src_path, $root, $target) = @ARGV;
  12.  
  13. sub print_deps {
  14.     my ($file, $deps) = @_;
  15.     $deps->{$file} = 1;
  16.  
  17.     open(my $fh, "<", "$file") or die "Cannot open file '$file': $!";
  18.     while (<$fh>) {
  19.         if (my ($i) = /^\@(?:verbatim)?include\s+(\S+)/) {
  20.             die "Circular dependency found in file $root\n" if exists $deps->{"doc/$1"};
  21.             print "$target: doc/$1\n";
  22.  
  23.             # skip looking for config.texi dependencies, since it has
  24.             # none, and is not located in the source tree
  25.             if ("$1" ne "config.texi") {
  26.                 print_deps("$src_path/doc/$1", {%$deps});
  27.             }
  28.         }
  29.     }
  30. }
  31.  
  32. print_deps($root, {});
  33.