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
6use warnings;
7use strict;
8
9die unless @ARGV == 3;
10
11my ($src_path, $root, $target) = @ARGV;
12
13sub print_deps {
14    my ($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
32print_deps($root, {});
33