#!/usr/bin/perl -w
use Config;
use Module::Build;
my $build = Module::Build->current;
my %config = (%Config, $build->notes);
my $input_file  = shift;
my $output_file = shift;
open my $input_fh, $input_file          or die "Can't open $input_file: $!";
open my $output_fh, ">$output_file"     or die "Can't open $output_file: $!";
print $output_fh <<"END";
/*
 * !!! DO NOT EDIT THIS FILE!!!
 * This file was generated from $input_file.
 * Edit that and rerun make to regenerate.
 */
END
while(<$input_fh>) {
    my $matched = s{%%(.*)%%}{defined $config{$1} ? $config{$1} : ''}eg;
    print $output_fh $_;
}