fix: support fallback for import.meta per chunk

(non lazy) chunks are evaluated even before entry. this adds a temporary fallback value for `globalThis._importMeta_` for chunks

src/rollup/config.ts

@@ -30,6 +30,7 @@ import { handlers } from './plugins/handlers'
 import { esbuild } from './plugins/esbuild'
 import { raw } from './plugins/raw'
 import { storage } from './plugins/storage'
+import { importMeta } from './plugins/import-meta'
 
 export type RollupConfig = InputOptions & { output: OutputOptions }
 
@@ -143,20 +144,7 @@ export const getRollupConfig = (nitro: Nitro) => {
   }
 
   // Universal import.meta
-  rollupConfig.plugins.push({
-    name: 'import-meta',
-    renderChunk (code, chunk) {
-      if (!chunk.isEntry) {
-        return
-      }
-      const url = nitro.options.node ? '_import_meta_url_' : '"file://_entry.js"'
-      const env = nitro.options.node ? 'process.env' : '{}'
-      return {
-        code: `globalThis._importMeta_={url:${url},env:${env}};` + code,
-        map: null
-      }
-    }
-  })
+  rollupConfig.plugins.push(importMeta(nitro))
 
   // https://github.com/rollup/plugins/tree/master/packages/replace
   rollupConfig.plugins.push(replace({

src/rollup/plugins/import-meta.ts

@@ -0,0 +1,28 @@
+import type { Plugin } from 'rollup'
+import { Nitro } from '../../types'
+
+export function importMeta (nitro: Nitro): Plugin {
+  const ImportMetaRe = /import\.meta|globalThis._importMeta_/
+
+  return {
+    name: 'import-meta',
+    renderChunk (code, chunk) {
+      const isEntry = chunk.isEntry
+      if (!isEntry && (!ImportMetaRe.test(code) || code.includes('ROLLUP_NO_REPLACE'))) {
+        return
+      }
+      const url = (nitro.options.node && isEntry) ? '_import_meta_url_' : '"file:///_entry.js"'
+      const env = nitro.options.node ? 'process.env' : '{}'
+      const ref = 'globalThis._importMeta_'
+      const stub = `{url:${url},env:${env}}`
+      const stubInit = isEntry
+        ? `${ref}=${stub};`
+        : `${ref}=${ref}||${stub};`
+
+      return {
+        code: stubInit + code,
+        map: null
+      }
+    }
+  }
+}

src/rollup/plugins/public-assets.ts

@@ -40,9 +40,9 @@ import { resolve } from 'pathe'
 import { dirname } from 'pathe'
 import { fileURLToPath } from 'url'
 import assets from '#internal/nitro/virtual/public-assets-data'
-const mainDir = dirname(fileURLToPath(import.meta.url))
 export function readAsset (id) {
-  return fsp.readFile(resolve(mainDir, assets[id].path)).catch(() => {})
+  const serverDir = dirname(fileURLToPath(import.meta.url))
+  return fsp.readFile(resolve(serverDir, assets[id].path))
 }`,
     '#internal/nitro/virtual/public-assets': `
 import assets from '#internal/nitro/virtual/public-assets-data'