first go at upgrading docs

[catagits/Catalyst-Runtime.git] / lib / Catalyst / Engine / Loader.pm

package Catalyst::Engine::Loader;
use Moose;
use Catalyst::Exception;
use namespace::autoclean;

extends 'Plack::Loader';

around guess => sub {
    my ($orig, $self) = (shift, shift);
    my $engine = $self->$orig(@_);
    if ($engine eq 'Standalone') {
        if ( $ENV{MOD_PERL} ) {
            my ( $software, $version ) =
              $ENV{MOD_PERL} =~ /^(\S+)\/(\d+(?:[\.\_]\d+)+)/;
            $version =~ s/_//g;
            $version =~ s/(\.[^.]+)\./$1/g;

            if ( $software eq 'mod_perl' ) {
                if ( $version >= 1.99922 ) {
                    $engine = 'Apache2';
                }

                elsif ( $version >= 1.9901 ) {
                    Catalyst::Exception->throw( message => 'Plack does not have a mod_perl 1.99 handler' );
                    $engine = 'Apache2::MP19';
                }

                elsif ( $version >= 1.24 ) {
                    $engine = 'Apache1';
                }

                else {
                    Catalyst::Exception->throw( message =>
                          qq/Unsupported mod_perl version: $ENV{MOD_PERL}/ );
                }
            }
        }
    }

    return $engine;
};

__PACKAGE__->meta->make_immutable( inline_constructor => 0 );

1;

__END__

=head1 NAME

Catalyst::Engine::Loader - The Catalyst Engine Loader

=head1 SYNOPSIS

See L<Catalyst>.

=head1 DESCRIPTION

Wrapper on L<Plack::Loader> which resets the ::Engine if you are using some
version of mod_perl.

=head1 AUTHORS

Catalyst Contributors, see Catalyst.pm

=head1 COPYRIGHT

This library is free software. You can redistribute it and/or modify it under
the same terms as Perl itself.

=cut