import {Target, Module, CoreTypeScriptOptions, BuildHelper} from "gulp-typescript-helper"; const DEFAULTS:CoreTypeScriptOptions = { noImplicitAny: true, removeComments: true, noEmitHelpers: true, sourceMap: true, declaration: true }); const builder = BuildHelper // Setup the builder by injecting a promise constructor. .inject(PromiseFactory) // Optional: will use Q as a default. // Define your source folder and destination base path. .fromTo(PATH.SOURCE, "./dist" , DEFAULTS); // Subsequent tasks are simplified down to this: gulp.task( TASK.DIST_UMD, ()=> builder .init( MODULE.UMD + '.min', TARGET.ES5, MODULE.UMD) .clear() // Clears the destination directory. .minify() // Signals to enable minification (uglify). .execute() // Commences the build pipeline .then(()=> /* Whatever steps you want to do before completion */) // );