Migrate build pipeline to Webpack 2

lib/tasks/assets/javascripts/build/application.js

@@ -50,12 +50,13 @@ export default (gulp, config, args) => {
           ],
           output: {
             filename: "application.js",
-            library: "Application"
+            library: "app",
+            libraryTarget: "window"
           },
           module: {
 
             /* Transpile ES6 to ES5 with Babel */
-            loaders: [
+            rules: [
               {
                 loader: "babel-loader",
                 test: /\.jsx?$/
@@ -65,7 +66,7 @@ export default (gulp, config, args) => {
           plugins: [
 
             /* Don't emit assets that include errors */
-            new webpack.NoErrorsPlugin(),
+            new webpack.NoEmitOnErrorsPlugin(),
 
             /* Provide JSX helper */
             new webpack.ProvidePlugin({
@@ -77,19 +78,30 @@ export default (gulp, config, args) => {
             args.optimize ? [
               new webpack.optimize.UglifyJsPlugin({
                 compress: {
-                  warnings: false
+                  warnings: false,
+                  screw_ie8: true,     // eslint-disable-line camelcase
+                  conditionals: true,
+                  unused: true,
+                  comparisons: true,
+                  sequences: true,
+                  dead_code: true,     // eslint-disable-line camelcase
+                  evaluate: true,
+                  if_return: true,     // eslint-disable-line camelcase
+                  join_vars: true      // eslint-disable-line camelcase
+                },
+                output: {
+                  comments: false
                 }
               })
             ] : []),
 
           /* Module resolver */
           resolve: {
-            modulesDirectories: [
+            modules: [
               "src/assets/javascripts",
               "node_modules"
             ],
             extensions: [
-              "",
               ".js",
               ".jsx"
             ]
@@ -102,7 +114,7 @@ export default (gulp, config, args) => {
 
           /* Sourcemap support */
           devtool: args.sourcemaps ? "inline-source-map" : ""
-        }))
+        }, webpack))
 
       /* Revisioning */
       .pipe(gulpif(args.revision, rev()))