fix(astro): incorrect path and build failure (#2648)

packages/astro/src/index.ts

@@ -4,7 +4,7 @@ import type { AstroIntegration } from 'astro'
 import type { VitePluginConfig } from '@unocss/vite'
 import VitePlugin from '@unocss/vite'
 import type { UserConfigDefaults } from '@unocss/core'
-import type { Plugin } from 'vite'
+import type { Plugin, ResolvedConfig } from 'vite'
 
 const UNO_INJECT_ID = 'uno-astro'
 const UNO_QUERY_KEY = 'uno-with-astro-key'
@@ -15,15 +15,25 @@ interface AstroVitePluginOptions {
 
 function AstroVitePlugin(options: AstroVitePluginOptions): Plugin {
   const { injects } = options
+
+  let config: ResolvedConfig
+
   return {
     name: 'unocss:astro',
-    apply: 'serve',
     enforce: 'pre',
-    resolveId(id, importer) {
+    configResolved(_config) {
+      config = _config
+    },
+    async resolveId(id, importer) {
       if (id === UNO_INJECT_ID)
         return id
-      if (importer?.endsWith(UNO_INJECT_ID))
-        return `${id}${id.includes('?') ? '&' : '?'}${UNO_QUERY_KEY}`
+      if (importer?.endsWith(UNO_INJECT_ID) && config && config.command === 'serve') {
+        const resolved = await this.resolve(id, importer, { skipSelf: true })
+        if (resolved) {
+          const fsPath = resolved.id
+          return `${fsPath}${fsPath.includes('?') ? '&' : '?'}${UNO_QUERY_KEY}`
+        }
+      }
     },
     load(id, options) {
       if (id.endsWith(UNO_INJECT_ID))