feat(schematic-utils): schematic utils from angular schematics

packages/schematic-utils/package.json

@@ -26,7 +26,7 @@
   "scripts": {
     "test": "jest",
     "build": "tsc -p tsconfig.json",
-    "lint": "eslint ./src/**/**",
+    "lint": "eslint ./src/**/** --ignore-pattern '*.spec.ts'",
     "preversion": "npm run build"
   },
   "dependencies": {

packages/schematic-utils/src/index.ts

@@ -1 +1,9 @@
 export * from "./utils/template";
+export * from "./utils/create-app-module";
+export * from "./utils/get-file-content";
+export * from "./utils/ast-utils";
+export * from "./utils/dependencies";
+export * from "./utils/find-module";
+export * from "./utils/ng-ast-utils";
+export * from "./utils/workspace";
+export * from "./utils/workspace-models";

packages/schematic-utils/src/tree/empty.ts

@@ -0,0 +1,15 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import { HostTree } from "./host-tree";
+
+export class EmptyTree extends HostTree {
+  constructor() {
+    super();
+  }
+}

packages/schematic-utils/src/tree/unit-test-tree.ts

@@ -0,0 +1,19 @@
+import { DelegateTree } from "./delegate";
+
+export class UnitTestTree extends DelegateTree {
+  get files(): string[] {
+    const result: string[] = [];
+    this.visit((path) => result.push(path));
+
+    return result;
+  }
+
+  readContent(path: string): string {
+    const buffer = this.read(path);
+    if (buffer === null) {
+      return "";
+    }
+
+    return buffer.toString();
+  }
+}