#!/usr/bin/perl

use strict;
use warnings;

use CPAN::FindDependencies qw( finddeps );
use CPAN::Mini;
use List::AllUtils qw( any );
use Module::CoreList;
use version;


sub main {
    my @deps = grep { is_real_dep($_) } finddeps('Moose');

    my @distros = map { $_->distribution() } @deps;

    my $filter_sub = sub { return ! any { $_[0] eq $_ } @distros };

    CPAN::Mini->update_mirror(
        remote       => 'ftp://mirrors2.kernel.org/pub/CPAN/',
        local        => '.',
        path_filters => $filter_sub,
        trace        => 1,
        skip_perl    => 1,
    );
}

my %skip_deps = map { $_ => 1 } qw(
    ExtUtils::MakeMaker
    Archive::Tar
    Compress::Zlib
    Compress::Raw::Bzip2
    Compress::Raw::Zlib
    IO::Zlib
    Package::Constants
    ExtUtils::CBuilder
    Pod::Simple
    Pod::Escapes
    Task::Weaken
    Module::Build
);

my $min_perl = version->new('5.8.5');
sub is_real_dep {
    my $dep = shift;

    # Include this just to make sure the user gets a version with
    # weaken available.
    return 1 if $dep->name eq 'Scalar::Util';

    return if $skip_deps{ $dep->name() };

    my $perl = Module::CoreList->first_release( $dep->name() );

    return if defined $perl && version->new($perl) le $min_perl;

    return 1;
}

main();