refactor!: avoid import.meta polyfill (#3213)

Author: pi0

src/build/rollup/base.ts

@@ -18,7 +18,7 @@ import { rollup as unwasm } from "unwasm/plugin";
 import { database } from "./plugins/database";
 import { handlers } from "./plugins/handlers";
 import { handlersMeta } from "./plugins/handlers-meta";
-import { importMeta } from "./plugins/import-meta";
+import { serverMain } from "./plugins/server-main";
 import { publicAssets } from "./plugins/public-assets";
 import { raw } from "./plugins/raw";
 import { serverAssets } from "./plugins/server-assets";
@@ -46,8 +46,8 @@ export function baseRollupPlugins(
     plugins.push(unwasm(nitro.options.wasm || {}));
   }
 
-  // Universal import.meta
-  plugins.push(importMeta(nitro));
+  // Inject gloalThis.__server_main__
+  plugins.push(serverMain(nitro));
 
   // Nitro Plugins
   const nitroPlugins = [...new Set(nitro.options.plugins)];
@@ -251,12 +251,6 @@ export function baseRollupConfig(nitro: Nitro) {
     "globalThis.process.": "process.",
     "process.env.RUNTIME_CONFIG": () =>
       JSON.stringify(nitro.options.runtimeConfig, null, 2),
-    ...Object.fromEntries(
-      [".", ";", ")", "[", "]", "}", " "].map((d) => [
-        `import.meta${d}`,
-        `globalThis._importMeta_${d}`,
-      ])
-    ),
     ...Object.fromEntries(
       [";", "(", "{", "}", " ", "\t", "\n"].map((d) => [
         `${d}global.`,

src/build/rollup/plugins/import-meta.ts

@@ -75,7 +75,7 @@ import { fileURLToPath } from 'node:url'
 import { resolve, dirname } from 'pathe'
 import assets from '#nitro-internal-virtual/public-assets-data'
 export function readAsset (id) {
-  const serverDir = dirname(fileURLToPath(import.meta.url))
+  const serverDir = dirname(fileURLToPath(globalThis.__nitro_main__))
   return fsp.readFile(resolve(serverDir, assets[id].path))
 }`;
       },

src/build/rollup/plugins/public-assets.ts

@@ -0,0 +1,16 @@
+import type { Nitro } from "nitro/types";
+import type { Plugin } from "rollup";
+
+export function serverMain(nitro: Nitro): Plugin {
+  return {
+    name: "nitro:server-main",
+    renderChunk(code, chunk) {
+      if (chunk.isEntry) {
+        return {
+          code: `globalThis.__nitro_main__ = import.meta.url; ${code}`,
+          map: null,
+        };
+      }
+    },
+  };
+}

src/build/rollup/plugins/server-main.ts

@@ -401,16 +401,6 @@ export function testNitro(
     expect(data.json.error).toBe(true);
   });
 
-  it.skipIf(isWindows && ctx.preset === "nitro-dev")(
-    "universal import.meta",
-    async () => {
-      const { status, data } = await callHandler({ url: "/api/import-meta" });
-      expect(status).toBe(200);
-      expect(data.testFile).toMatch(/[/\\]test.txt$/);
-      expect(data.hasEnv).toBe(true);
-    }
-  );
-
   it("handles custom server assets", async () => {
     const { data: html, status: htmlStatus } = await callHandler({
       url: "/file?filename=index.html",