refactor(builder): make plugins in BuildContext update dynamically (#4280)

packages/builder/src/builder.js

@@ -207,8 +207,8 @@ export default class Builder {
   async generateRoutesAndFiles() {
     consola.debug(`Generating nuxt files`)
 
-    this.plugins.length = 0
-    this.plugins.push.apply(this.plugins, this.normalizePlugins())
+    // Plugins
+    this.plugins = Array.from(this.normalizePlugins())
 
     // -- Templates --
     let templatesFiles = Array.from(this.template.templatesFiles)

packages/builder/src/context.js

@@ -1,8 +1,12 @@
 export default class BuildContext {
   constructor(builder) {
+    this._builder = builder
     this.nuxt = builder.nuxt
     this.options = builder.nuxt.options
     this.isStatic = false
-    this.plugins = builder.plugins
+  }
+
+  get plugins() {
+    return this._builder.plugins
   }
 }