WIP: feat: enable rspack newTreeShaking

package.json

@@ -58,6 +58,8 @@
   },
   "pnpm": {
     "overrides": {
+      "@rspack/core": "0.5.9-canary-845e837-20240327011520",
+      "@rspack/plugin-react-refresh": "0.5.9-canary-845e837-20240327011520",
       "esbuild": "~0.19.0",
       "array.prototype.flat": "npm:@nolyfill/array.prototype.flat@1.0.24",
       "@rsbuild/core": "link:packages/core",

packages/core/src/provider/plugins/transition.ts

@@ -6,22 +6,18 @@ import type { RsbuildPlugin } from '../../types';
 export const pluginTransition = (): RsbuildPlugin => ({
   name: 'rsbuild:transition',
 
-  setup() {
+  setup(api) {
     process.env.RSPACK_CONFIG_VALIDATE = 'loose-silent';
 
     // improve kill process performance
     // https://github.com/web-infra-dev/rspack/pull/5486
     process.env.WATCHPACK_WATCHER_LIMIT ||= '20';
 
-    // api.modifyRspackConfig((config, { isProd }) => {
-    // only enable new tree shaking in production build,
-    // because Rspack still has some problems when using it in dev mode.
-    // such as https://github.com/web-infra-dev/rspack/issues/5887
-    // if (isProd) {
-    //   config.experiments ||= {};
-    //   config.experiments.rspackFuture ||= {};
-    //   config.experiments.rspackFuture.newTreeshaking = true;
-    // }
-    // });
+    api.modifyRspackConfig((config) => {
+      // rspack will be enabled by default in the next minor version
+      config.experiments ||= {};
+      config.experiments.rspackFuture ||= {};
+      config.experiments.rspackFuture.newTreeshaking = true;
+    });
   },
 });

packages/core/tests/__snapshots__/builder.test.ts.snap

@@ -20,6 +20,9 @@ exports[`should use rspack as default bundler > apply rspack correctly 1`] = `
   },
   "experiments": {
     "asyncWebAssembly": true,
+    "rspackFuture": {
+      "newTreeshaking": true,
+    },
   },
   "infrastructureLogging": {
     "level": "error",

packages/core/tests/__snapshots__/default.test.ts.snap

@@ -20,6 +20,9 @@ exports[`applyDefaultPlugins > should apply default plugins correctly 1`] = `
   },
   "experiments": {
     "asyncWebAssembly": true,
+    "rspackFuture": {
+      "newTreeshaking": true,
+    },
   },
   "infrastructureLogging": {
     "level": "error",
@@ -721,6 +724,9 @@ exports[`applyDefaultPlugins > should apply default plugins correctly when prod
   },
   "experiments": {
     "asyncWebAssembly": true,
+    "rspackFuture": {
+      "newTreeshaking": true,
+    },
   },
   "infrastructureLogging": {
     "level": "error",
@@ -1487,6 +1493,9 @@ exports[`applyDefaultPlugins > should apply default plugins correctly when targe
   },
   "experiments": {
     "asyncWebAssembly": true,
+    "rspackFuture": {
+      "newTreeshaking": true,
+    },
   },
   "infrastructureLogging": {
     "level": "error",
@@ -1903,6 +1912,9 @@ exports[`tools.rspack > should match snapshot 1`] = `
   },
   "experiments": {
     "asyncWebAssembly": true,
+    "rspackFuture": {
+      "newTreeshaking": true,
+    },
   },
   "infrastructureLogging": {
     "level": "error",

packages/plugin-react/tests/__snapshots__/index.test.ts.snap

@@ -37,6 +37,9 @@ exports[`plugins/react > should work with swc-loader 1`] = `
   },
   "experiments": {
     "asyncWebAssembly": true,
+    "rspackFuture": {
+      "newTreeshaking": true,
+    },
   },
   "infrastructureLogging": {
     "level": "error",