ES6彩票实战项目中webpack-stream - No files given问题

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import gulp from 'gulp';import gulpif from 'gulp-if';import concat from 'gulp-concat';import webpack from 'webpack';import gulpWebpack from 'webpack-stream';import named from 'vinyl-named';import livereload from 'gulp-livereload';import plumber from 'gulp-plumber';import rename from 'gulp-rename';import uglify from 'gulp-uglify';import {log,colors} from 'gulp-util';import args from './util/args';gulp.task('scripts',()=>{return gulp.src(['app/js/index.js']).pipe(plumber({errorHandle:function(){}})).pipe(named()).pipe(gulpWebpack({module:{loaders:[{test: /\.js$/,loader: 'babel-loader'}]}}),null,(err,stats)=>{log(`Finished '${colors.cyan('scripts')}'`,stats.toString({chunks:false}))}).pipe(gulp.dest('server/public/js')).pipe(rename({basename:'cp',extname:'.min.js'})).pipe(uglify({compress:{properties:false},output:{'quote_keys':true}})).pipe(gulp.dest('server/public/js')).pipe(gulpif(args.watch,livereload()))})