Build: Upgrade Webpack 5 (#36444)

* build(webpack): bump to v5 and successful yarn start compilation

* build(webpack): update postcss dependencies

* build(webpack): silence warnings about hash renamed to fullhash

* build(webpack): enable persistent cache to store generated webpack modules / chunks

* build(webpack): prefer eslintWebpackPlugin over tschecker so eslint doesn't block typechecking

* chore(yarn): run yarn-deduplicate to clean up dependencies

* chore(yarn): refresh lock file after clean install

* build(webpack): prefer output.clean over CleanWebpackPlugin

* build(webpack): prefer esbuild over babel-loader for dev config

* build(babel): turn off cache compression to improve build performance

* build(webpack): get production builds working

* build(webpack): remove phantomJS (removed from grafana in v7) specific loader

* build(webpack): put back babel for dev builds no performance gain in using esbuild in webpack

* build(webpack): prefer terser and optimise css plugins for prod. slower but smaller bundles

* build(webpack): clean up redundant code. inform postcss about node_modules

* build(webpack): remove deprecation warnings flag

* build(webpack): bump packages, dev performance optimisations, attempt to get hot working

* chore(storybook): use webpack 5 for dev and production builds

* build(storybook): speed up dev build

* chore(yarn): refresh lock file

* chore(webpack): bump webpack and related deps to latest

* refactor(webpack): put back inline-source-map, move start scripts out of grafana toolkit

* feat(webpack): prefer react-refresh over react-hot-loader

* build(webpack): update webpack.hot to use react-refresh

* chore: remove react-hot-loader from codebase

* refactor(queryeditorrow): fix circular dependency causing react-fast-refresh errors

* revert(webpack): remove stats.errorDetails from common config

* build(webpack): bump to v5 and successful yarn start compilation

* build(webpack): update postcss dependencies

* build(webpack): silence warnings about hash renamed to fullhash

* build(webpack): enable persistent cache to store generated webpack modules / chunks

* build(webpack): prefer eslintWebpackPlugin over tschecker so eslint doesn't block typechecking

* chore(yarn): run yarn-deduplicate to clean up dependencies

* chore(yarn): refresh lock file after clean install

* build(webpack): prefer output.clean over CleanWebpackPlugin

* build(webpack): prefer esbuild over babel-loader for dev config

* build(babel): turn off cache compression to improve build performance

* build(webpack): get production builds working

* build(webpack): remove phantomJS (removed from grafana in v7) specific loader

* build(webpack): put back babel for dev builds no performance gain in using esbuild in webpack

* build(webpack): prefer terser and optimise css plugins for prod. slower but smaller bundles

* build(webpack): clean up redundant code. inform postcss about node_modules

* build(webpack): remove deprecation warnings flag

* build(webpack): bump packages, dev performance optimisations, attempt to get hot working

* chore(storybook): use webpack 5 for dev and production builds

* build(storybook): speed up dev build

* chore(yarn): refresh lock file

* chore(webpack): bump webpack and related deps to latest

* refactor(webpack): put back inline-source-map, move start scripts out of grafana toolkit

* feat(webpack): prefer react-refresh over react-hot-loader

* build(webpack): update webpack.hot to use react-refresh

* chore: remove react-hot-loader from codebase

* refactor(queryeditorrow): fix circular dependency causing react-fast-refresh errors

* revert(webpack): remove stats.errorDetails from common config

* revert(webpack): remove include from babel-loader so symlinks (enterprise) work as before

* refactor(webpack): fix deprecation warnings in prod builds

* fix(storybook): fix failing builds due to replacing css-optimise webpack plugin

* fix(storybook): use raw-loader for svg icons

* build(webpack): fix dev script colors error

* chore(webpack): bump css-loader and react-refresh-webpack-plugin to latest versions

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>

scripts/webpack/webpack.prod.js

@@ -1,12 +1,12 @@
 'use strict';
 
-const merge = require('webpack-merge');
+const { merge } = require('webpack-merge');
 const TerserPlugin = require('terser-webpack-plugin');
 const common = require('./webpack.common.js');
 const path = require('path');
 const HtmlWebpackPlugin = require('html-webpack-plugin');
 const MiniCssExtractPlugin = require('mini-css-extract-plugin');
-const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
+const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');
 const getBabelConfig = require('./babel.config');
 
 module.exports = merge(common, {
@@ -41,16 +41,14 @@ module.exports = merge(common, {
     nodeEnv: 'production',
     minimizer: [
       new TerserPlugin({
-        cache: false,
         parallel: false,
-        sourceMap: true,
       }),
-      new OptimizeCSSAssetsPlugin({}),
+      new CssMinimizerPlugin(),
     ],
   },
   plugins: [
     new MiniCssExtractPlugin({
-      filename: 'grafana.[name].[hash].css',
+      filename: 'grafana.[name].[fullhash].css',
     }),
     new HtmlWebpackPlugin({
       filename: path.resolve(__dirname, '../../public/views/error.html'),