3 files changed, 12 insertions, 23 deletions
diff --git a/config/webpack/loaders/sass.js b/config/webpack/loaders/sass.js
index 920d5350f..5a96096bd 100644
--- a/config/webpack/loaders/sass.js
+++ b/config/webpack/loaders/sass.js
@@ -1,16 +1,10 @@
 const MiniCssExtractPlugin = require('mini-css-extract-plugin');
-const { env } = require('../configuration.js');
 
 module.exports = {
   test: /\.s?css$/i,
   use: [
     MiniCssExtractPlugin.loader,
-    {
-      loader: 'css-loader',
-      options: {
-        minimize: env.NODE_ENV === 'production',
-      },
-    },
+    'css-loader',
     {
       loader: 'postcss-loader',
       options: {
@@ -21,6 +15,9 @@ module.exports = {
       loader: 'sass-loader',
       options: {
         includePaths: ['app/javascript'],
+        fiber: require('fibers'),
+        implementation: require('sass'),
+        sourceMap: true,
       },
     },
   ],
diff --git a/config/webpack/production.js b/config/webpack/production.js
index 30147cfe3..d37e11792 100644
--- a/config/webpack/production.js
+++ b/config/webpack/production.js
@@ -3,6 +3,7 @@
 const merge = require('webpack-merge');
 const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
 const CompressionPlugin = require('compression-webpack-plugin');
+const zopfli = require('@gfx/zopfli');
 const sharedConfig = require('./shared.js');
 const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
 const OfflinePlugin = require('offline-plugin');
@@ -10,16 +11,6 @@ const { publicPath } = require('./configuration.js');
 const path = require('path');
 const { URL } = require('url');
 
-let compressionAlgorithm;
-try {
-  const zopfli = require('node-zopfli');
-  compressionAlgorithm = (content, options, fn) => {
-    zopfli.gzip(content, options, fn);
-  };
-} catch (error) {
-  compressionAlgorithm = 'gzip';
-}
-
 let attachmentHost;
 
 if (process.env.S3_ENABLED === 'true') {
@@ -69,7 +60,9 @@ module.exports = merge(sharedConfig, {
 
   plugins: [
     new CompressionPlugin({
-      algorithm: compressionAlgorithm,
+      algorithm(input, compressionOptions, callback) {
+        return zopfli.gzip(input, compressionOptions, callback);
+      },
       test: /\.(js|css|html|json|ico|svg|eot|otf|ttf)$/,
     }),
     new BundleAnalyzerPlugin({ // generates report.html and stats.json
diff --git a/config/webpack/shared.js b/config/webpack/shared.js
index 58eab4b4c..938bab9f5 100644
--- a/config/webpack/shared.js
+++ b/config/webpack/shared.js
@@ -4,7 +4,7 @@ const webpack = require('webpack');
 const { basename, dirname, join, relative, resolve } = require('path');
 const { sync } = require('glob');
 const MiniCssExtractPlugin = require('mini-css-extract-plugin');
-const ManifestPlugin = require('webpack-manifest-plugin');
+const AssetsManifestPlugin = require('webpack-assets-manifest');
 const { env, settings, core, flavours, output, loadersDir } = require('./configuration.js');
 const localePacks = require('./generateLocalePacks');
 
@@ -100,10 +100,9 @@ module.exports = {
     new MiniCssExtractPlugin({
       filename: env.NODE_ENV === 'production' ? '[name]-[contenthash].css' : '[name].css',
     }),
-    new ManifestPlugin({
-      publicPath: output.publicPath,
-      writeToFileEmit: true,
-      filter: file => !file.isAsset || file.isModuleAsset,
+    new AssetsManifestPlugin({
+      publicPath: true,
+      writeToDisk: true,
     }),
   ],