var Metalsmithrequire('metalsmith'); 
var filterrequire('metalsmith-filter'); 
var regex_sass'**/*.sass'; 
var other_pluginrequire('./plugins/03-read-other-variables'); 
Metalsmith(__dirname).source('../../sass').use(filter(regex_sass)).use(other_plugin()).build(function (err){ 
if (err) throw err
} 
);