refacotr: reduce duplicate call of plugins getter

lib/builder/builder.js

@@ -64,7 +64,7 @@ export default class Builder {
     // }
   }
 
-  get plugins() {
+  normalizePlugins() {
     return _.uniqBy(
       this.options.plugins.map((p) => {
         if (typeof p === 'string') p = { src: p }
@@ -156,6 +156,8 @@ export default class Builder {
   async generateRoutesAndFiles() {
     consola.debug(`Generating nuxt files`)
 
+    this.plugins = this.normalizePlugins()
+
     // -- Templates --
     let templatesFiles = [
       'App.js',
@@ -445,14 +447,10 @@ export default class Builder {
     // Check plugins exist then set alias to their real path
     await Promise.all(this.plugins.map(async (p) => {
       if (!await fsExtra.pathExists(p.src)) {
-        throw new Error(`Plugin not found: ${r(p.src)}`)
+        throw new Error(`Plugin not found: ${p.src}`)
       }
-    }))
 
-    // Alias plugins to their real path
-    this.plugins.forEach((p) => {
       const src = this.relativeToBuild(p.src)
-
       // Client config
       if (!clientConfig.resolve.alias[p.name]) {
         clientConfig.resolve.alias[p.name] = src
@@ -463,7 +461,7 @@ export default class Builder {
         // Alias to noop for ssr:false plugins
         serverConfig.resolve.alias[p.name] = p.ssr ? src : './empty.js'
       }
-    })
+    }))
 
     // Configure compilers
     this.compilers = compilersOptions.map((compilersOption) => {