Generalize minifier (#2577)

config/.eslintrc.json

@@ -0,0 +1,7 @@
+{
+  "extends": "../.eslintrc.json",
+  "rules": {
+    "import/no-extraneous-dependencies": 0,
+    "global-require": 0
+  }
+}

config/minimizer.js

@@ -0,0 +1,29 @@
+const BabelMinifyPlugin = require("babel-minify-webpack-plugin");
+
+module.exports.minimizer = [
+  // Took options from Polymer build tool
+  // https://github.com/Polymer/tools/blob/master/packages/build/src/js-transform.ts
+  new BabelMinifyPlugin(
+    {
+      // Disable the minify-constant-folding plugin because it has a bug relating
+      // to invalid substitution of constant values into export specifiers:
+      // https://github.com/babel/minify/issues/820
+      evaluate: false,
+
+      // TODO(aomarks) Find out why we disabled this plugin.
+      simplifyComparisons: false,
+
+      // Prevent removal of things that babel thinks are unreachable, but sometimes
+      // gets wrong: https://github.com/Polymer/tools/issues/724
+      deadcode: false,
+
+      // Disable the simplify plugin because it can eat some statements preceeding
+      // loops. https://github.com/babel/minify/issues/824
+      simplify: false,
+
+      // This is breaking ES6 output. https://github.com/Polymer/tools/issues/261
+      mangle: false,
+    },
+    {}
+  ),
+];

demo/webpack.config.js

@@ -1,9 +1,9 @@
 const path = require("path");
 const webpack = require("webpack");
-const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
 const CopyWebpackPlugin = require("copy-webpack-plugin");
 const WorkboxPlugin = require("workbox-webpack-plugin");
 const { babelLoaderConfig } = require("../config/babel.js");
+const { minimizer } = require("../config/babel.js");
 
 const isProd = process.env.NODE_ENV === "production";
 const chunkFilename = isProd ? "chunk.[chunkhash].js" : "[name].chunk.js";
@@ -39,6 +39,9 @@ module.exports = {
       },
     ],
   },
+  optimization: {
+    minimizer,
+  },
   plugins: [
     new webpack.DefinePlugin({
       __DEV__: false,
@@ -69,19 +72,10 @@ module.exports = {
       },
     ]),
     isProd &&
-      new UglifyJsPlugin({
-        extractComments: true,
-        sourceMap: true,
-        uglifyOptions: {
-          // Disabling because it broke output
-          mangle: false,
-        },
+      new WorkboxPlugin.GenerateSW({
+        swDest: "service_worker_es5.js",
+        importWorkboxFrom: "local",
       }),
-    // isProd &&
-    new WorkboxPlugin.GenerateSW({
-      swDest: "service_worker_es5.js",
-      importWorkboxFrom: "local",
-    }),
   ].filter(Boolean),
   resolve: {
     extensions: [".ts", ".js", ".json"],

gallery/webpack.config.js

@@ -1,7 +1,7 @@
 const path = require("path");
-const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
 const CopyWebpackPlugin = require("copy-webpack-plugin");
 const { babelLoaderConfig } = require("../config/babel.js");
+const { minimizer } = require("../config/babel.js");
 
 const isProd = process.env.NODE_ENV === "production";
 const chunkFilename = isProd ? "chunk.[chunkhash].js" : "[name].chunk.js";
@@ -32,6 +32,9 @@ module.exports = {
       },
     ],
   },
+  optimization: {
+    minimizer,
+  },
   plugins: [
     new CopyWebpackPlugin([
       "public",

hassio/webpack.config.js

@@ -1,7 +1,7 @@
-const UglifyJsPlugin = require("uglifyjs-webpack-plugin");
 const CompressionPlugin = require("compression-webpack-plugin");
 const config = require("./config.js");
 const { babelLoaderConfig } = require("../config/babel.js");
+const { minimizer } = require("../config/babel.js");
 
 const isProdBuild = process.env.NODE_ENV === "production";
 const isCI = process.env.CI === "true";
@@ -27,16 +27,10 @@ module.exports = {
       },
     ],
   },
+  optimization: {
+    minimizer,
+  },
   plugins: [
-    isProdBuild &&
-      new UglifyJsPlugin({
-        extractComments: true,
-        sourceMap: true,
-        uglifyOptions: {
-          // Disabling because it broke output
-          mangle: false,
-        },
-      }),
     isProdBuild &&
       !isCI &&
       new CompressionPlugin({

webpack.config.js

@@ -1,7 +1,6 @@
 const fs = require("fs");
 const path = require("path");
 const webpack = require("webpack");
-const BabelMinifyPlugin = require("babel-minify-webpack-plugin");
 const CopyWebpackPlugin = require("copy-webpack-plugin");
 const WorkboxPlugin = require("workbox-webpack-plugin");
 const CompressionPlugin = require("compression-webpack-plugin");
@@ -9,6 +8,7 @@ const HtmlWebpackPlugin = require("html-webpack-plugin");
 const zopfli = require("@gfx/zopfli");
 const translationMetadata = require("./build-translations/translationMetadata.json");
 const { babelLoaderConfig } = require("./config/babel.js");
+const { minimizer } = require("./config/minimizer.js");
 
 const version = fs.readFileSync("setup.py", "utf8").match(/\d{8}\.\d+/);
 if (!version) {
@@ -77,29 +77,7 @@ function createConfig(isProdBuild, latestBuild) {
       ],
     },
     optimization: {
-      minimizer: [
-        // Took options from Polymer build tool
-        // https://github.com/Polymer/tools/blob/master/packages/build/src/js-transform.ts
-        new BabelMinifyPlugin(
-          {
-            // Disable the minify-constant-folding plugin because it has a bug relating to
-            // invalid substitution of constant values into export specifiers:
-            // https://github.com/babel/minify/issues/820
-            evaluate: false,
-
-            // TODO(aomarks) Find out why we disabled this plugin.
-            simplifyComparisons: false,
-
-            // Disable the simplify plugin because it can eat some statements preceeding
-            // loops. https://github.com/babel/minify/issues/824
-            simplify: false,
-
-            // This is breaking ES6 output. https://github.com/Polymer/tools/issues/261
-            mangle: false,
-          },
-          {}
-        ),
-      ],
+      minimizer,
     },
     plugins: [
       new webpack.DefinePlugin({