Pass external config option through to `rollup.rollup`
@ -88,7 +88,8 @@ var equivalents = {
};
function execute ( options, command ) {
var external = command.external ? command.external.split( ',' ) : [];
var external = ( options.external || [] )
.concat( command.external ? command.external.split( ',' ) : [] );
if ( command.globals ) {
var globals = Object.create( null );