fix: fix ssr -> rsc

Author: hi-ogawa

packages/plugin-rsc/src/plugin.ts

@@ -173,10 +173,9 @@ class RscPluginManager {
       let code = 'export default {\n'
       for (const [resolvedId, meta] of Object.entries(imports)) {
         if (!meta.fileName) {
-          console.warn(
+          throw new Error(
             `[vite-rsc] missing output for environment import: ${resolvedId}`,
           )
-          continue
         }
         const targetOutDir =
           this.config.environments[meta.targetEnv]!.build.outDir

packages/plugin-rsc/src/plugins/import-environment.ts

@@ -132,10 +132,11 @@ export function vitePluginImportEnvironment(
               resolvedId = resolved.id
             }
 
+            // TODO: environmentImportMetaMap structure seems still awkward
             // Track discovered entry, keyed by [sourceEnv][resolvedId]
             const sourceEnv = this.environment.name
             manager.environmentImportMetaMap[sourceEnv] ??= {}
-            manager.environmentImportMetaMap[sourceEnv]![resolvedId] = {
+            manager.environmentImportMetaMap[sourceEnv]![resolvedId] ??= {
               resolvedId,
               targetEnv: environmentName,
               sourceEnv,