Build: Faster external plugin builds (#76974)

* build(plugin-configs): move swc-loader to configs and use require.resolve for less duplicate deps

* build(plugins): move cacheLocation to ESLintPlugin, run lint and tscheck plugins in dev

* revert(plugins): remove obsolete stats setting

packages/grafana-plugin-configs/package.json

@@ -13,6 +13,7 @@
     "fork-ts-checker-webpack-plugin": "8.0.0",
     "glob": "10.3.3",
     "replace-in-file-webpack-plugin": "1.0.6",
+    "swc-loader": "0.2.3",
     "webpack": "5.89.0"
   },
   "packageManager": "yarn@3.6.0"

packages/grafana-plugin-configs/webpack.config.ts

@@ -3,7 +3,7 @@ import ESLintPlugin from 'eslint-webpack-plugin';
 import ForkTsCheckerWebpackPlugin from 'fork-ts-checker-webpack-plugin';
 import path from 'path';
 import ReplaceInFileWebpackPlugin from 'replace-in-file-webpack-plugin';
-import { Configuration } from 'webpack';
+import { Configuration, DefinePlugin } from 'webpack';
 
 import { DIST_DIR } from './constants';
 import { getPackageJson, getPluginJson, getEntries, hasLicense } from './utils';
@@ -29,12 +29,6 @@ const config = async (env: Record<string, unknown>): Promise<Configuration> => {
         config: [__filename],
       },
       cacheDirectory: path.resolve(__dirname, '../../.yarn/.cache/webpack', path.basename(process.cwd())),
-      cacheLocation: path.resolve(
-        __dirname,
-        '../../.yarn/.cache/eslint-webpack-plugin',
-        path.basename(process.cwd()),
-        '.eslintcache'
-      ),
     },
 
     context: process.cwd(),
@@ -89,7 +83,7 @@ const config = async (env: Record<string, unknown>): Promise<Configuration> => {
           exclude: /(node_modules)/,
           test: /\.[tj]sx?$/,
           use: {
-            loader: 'swc-loader',
+            loader: require.resolve('swc-loader'),
             options: {
               jsc: {
                 baseUrl: '.',
@@ -186,21 +180,31 @@ const config = async (env: Record<string, unknown>): Promise<Configuration> => {
           ],
         },
       ]),
-      new ForkTsCheckerWebpackPlugin({
-        async: Boolean(env.development),
-        issue: {
-          include: [{ file: '**/*.{ts,tsx}' }],
-        },
-        typescript: { configFile: path.join(process.cwd(), 'tsconfig.json') },
-      }),
-      new ESLintPlugin({
-        extensions: ['.ts', '.tsx'],
-        lintDirtyModulesOnly: Boolean(env.development), // don't lint on start, only lint changed files
-      }),
+      env.development
+        ? new ForkTsCheckerWebpackPlugin({
+            async: true,
+            issue: {
+              include: [{ file: '**/*.{ts,tsx}' }],
+            },
+            typescript: { configFile: path.join(process.cwd(), 'tsconfig.json') },
+          })
+        : new DefinePlugin({}),
+      env.development
+        ? new ESLintPlugin({
+            extensions: ['.ts', '.tsx'],
+            lintDirtyModulesOnly: true, // don't lint on start, only lint changed files
+            cacheLocation: path.resolve(
+              __dirname,
+              '../../.yarn/.cache/eslint-webpack-plugin',
+              path.basename(process.cwd()),
+              '.eslintcache'
+            ),
+          })
+        : new DefinePlugin({}),
     ],
 
     resolve: {
-      extensions: ['.js', '.jsx', '.ts', '.tsx'],
+      extensions: ['.ts', '.tsx', '.js', '.jsx'],
       unsafeCache: true,
     },
 

public/app/plugins/datasource/grafana-testdata-datasource/package.json

@@ -26,7 +26,6 @@
     "@types/node": "18.18.5",
     "@types/react": "18.2.15",
     "@types/testing-library__jest-dom": "5.14.8",
-    "swc-loader": "0.2.3",
     "ts-node": "10.9.1",
     "webpack": "5.89.0"
   },

yarn.lock

@@ -2857,7 +2857,6 @@ __metadata:
     react: 18.2.0
     react-use: 17.4.0
     rxjs: 7.8.1
-    swc-loader: 0.2.3
     ts-node: 10.9.1
     tslib: 2.6.0
     webpack: 5.89.0
@@ -3255,6 +3254,7 @@ __metadata:
     fork-ts-checker-webpack-plugin: 8.0.0
     glob: 10.3.3
     replace-in-file-webpack-plugin: 1.0.6
+    swc-loader: 0.2.3
     tslib: 2.6.0
     webpack: 5.89.0
   languageName: unknown