From 71c6cc506e52bd14cf514b305f45b2f9914ceb36 Mon Sep 17 00:00:00 2001
From: Alan Agius <alan.agius4@gmail.com>
Date: Wed, 6 Feb 2019 06:13:45 +0100
Subject: [PATCH] refactor: add `allowAdditionalArgs` to be able to bypass
 extra params validations (#13556)

---
 packages/angular/cli/commands/add-impl.ts        | 1 +
 packages/angular/cli/models/schematic-command.ts | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/angular/cli/commands/add-impl.ts b/packages/angular/cli/commands/add-impl.ts
index 34c9b75b1f..42c1b5b09c 100644
--- a/packages/angular/cli/commands/add-impl.ts
+++ b/packages/angular/cli/commands/add-impl.ts
@@ -25,6 +25,7 @@ const npa = require('npm-package-arg');
 
 export class AddCommand extends SchematicCommand<AddCommandSchema> {
   readonly allowPrivateSchematics = true;
+  readonly allowAdditionalArgs = true;
   readonly packageManager = getPackageManager(this.workspace.root);
 
   async run(options: AddCommandSchema & Arguments) {
diff --git a/packages/angular/cli/models/schematic-command.ts b/packages/angular/cli/models/schematic-command.ts
index 833026d30b..63c8b29319 100644
--- a/packages/angular/cli/models/schematic-command.ts
+++ b/packages/angular/cli/models/schematic-command.ts
@@ -77,6 +77,7 @@ export abstract class SchematicCommand<
   T extends (BaseSchematicSchema & BaseCommandOptions),
 > extends Command<T> {
   readonly allowPrivateSchematics: boolean = false;
+  readonly allowAdditionalArgs: boolean = false;
   private _host = new NodeJsSyncHost();
   private _workspace: experimental.workspace.Workspace;
   private readonly _engine: Engine<FileSystemCollectionDesc, FileSystemSchematicDesc>;
@@ -438,7 +439,7 @@ export abstract class SchematicCommand<
     }
 
     // ng-add is special because we don't know all possible options at this point
-    if (args['--'] && schematicName !== 'ng-add') {
+    if (args['--'] && !this.allowAdditionalArgs) {
       args['--'].forEach(additional => {
         this.logger.fatal(`Unknown option: '${additional.split(/=/)[0]}'`);
       });