Quick and Dirty Rollup copy plugin

rollup.config.js

//..imports for rollup.config

//// 
// plugin for copy
////
import fs from 'fs';
import path from 'path';

const copyPlugin = function (options) {
    return {
        ongenerate(){
            const targDir = path.dirname(options.targ);
            if (!fs.existsSync(targDir)){
                fs.mkdirSync(targDir);
            }
            fs.writeFileSync(options.targ, fs.readFileSync(options.src));
        }
    };
};
// end plugin

export default {
    //...rollup config
    plugins: [
        //...other plugins
        /*
         Example copy non-module:  https://github.com/adlnet/xAPIWrapper
         */
        copyPlugin({
            src:  './node_modules/xAPIWrapper/dist/xapiwrapper.min.js',
            targ: './dist/xapiwrapper.min.js'
        })
    ],
    //...rollup config
};