gistfile1.pl

{    # custom renderer <% include 'foo', handler => 'no' %>

    package Mojolicious::Plugin::NoRenderer;
    use Mojo::Base 'Mojolicious::Plugin';
    use IO::File;

    sub register {
        my ( $self, $app, $options ) = @_;

        $options ||= {};

        $app->renderer->add_handler(
            no => sub {
                my ( $r, $c, $output, $options ) = @_;

                my $file     = $r->template_path($options);
                my $fh       = IO::File->new( $file, 'r' ) or die "failed to open $file: $!";
                my $contents = do { local $/ = undef; <$fh> };

                undef $fh;

                $$output = $contents;
            }
        );
    }
}