feat(ng-schematics): add prompt for migrations

packages/ng-schematics/src/migrations/interfaces/options.ts

@@ -0,0 +1,4 @@
+export interface Options {
+	[key: string]: any;
+	applyMigrations: boolean;
+}

packages/ng-schematics/src/migrations/migration-collection.json

@@ -4,7 +4,8 @@
 	"migration-01": {
 		"version": "17.1.0",
 		"description": "Updates Ignite UI for Angular Schematics project from 17.0.X to 17.1.X",
-		"factory": "./update-1"
+		"factory": "./update-1",
+		"schema": "./schema.json"
 	}
   }
 }

packages/ng-schematics/src/migrations/schema.json

@@ -0,0 +1,14 @@
+{
+    "$schema": "http://json-schema.org/schema",
+    "$id": "igniteui-angular-ng-add",
+    "title": "IgniteUI for Angular ng-add schematic",
+    "type": "object",
+    "properties": {
+        "applyMigrations": {
+            "type": "boolean",
+            "description": "Apply migrations to the project.",
+            "default": true,
+            "x-prompt": "Would you like to apply automated migrations?"
+        }
+    }
+}

packages/ng-schematics/src/migrations/update-1/index.spec.ts

@@ -39,7 +39,7 @@ describe("Update XXX", () => {
 `
 		);
 
-		const tree = await schematicRunner.runSchematicAsync("migration-01", {}, appTree).toPromise();
+		const tree = await schematicRunner.runSchematicAsync("migration-01", { applyMigrations: true }, appTree).toPromise();
 		expect(tree.readContent("./igniteui-cli.json"))
 			.toEqual(
 `{

packages/ng-schematics/src/migrations/update-1/index.ts

@@ -1,7 +1,10 @@
 import { Rule, SchematicContext, Tree } from "@angular-devkit/schematics";
+import { Options } from "../interfaces/options";
 
-export default function(): Rule {
+export default function(options: Options): Rule {
 	return (host: Tree, context: SchematicContext) => {
+		if (!options.applyMigrations) { return; }
+
 		context.logger.info("Updating project to Ignite UI CLI XXX");
 
 		const igConfig = "./igniteui-cli.json";