feat(core): add postinstall ngcc migration (#32999)

PR Close #32999

packages/core/schematics/test/BUILD.bazel

@@ -11,6 +11,7 @@ ts_library(
         "//packages/core/schematics/migrations/dynamic-queries",
         "//packages/core/schematics/migrations/missing-injectable",
         "//packages/core/schematics/migrations/move-document",
+        "//packages/core/schematics/migrations/postinstall-ngcc",
         "//packages/core/schematics/migrations/renderer-to-renderer2",
         "//packages/core/schematics/migrations/static-queries",
         "//packages/core/schematics/migrations/template-var-assignment",

packages/core/schematics/test/postinstall_ngcc_spec.ts

@@ -0,0 +1,58 @@
+/**
+ * @license
+ * Copyright Google Inc. 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 {EmptyTree} from '@angular-devkit/schematics';
+import {SchematicTestRunner, UnitTestTree} from '@angular-devkit/schematics/testing';
+
+
+describe('postinstall ngcc migration', () => {
+  let runner: SchematicTestRunner;
+  let tree: UnitTestTree;
+  const pkgJsonPath = '/package.json';
+  const ngccPostinstall =
+      `"postinstall": "ngcc --properties es2015 browser module main --first-only --create-ivy-entry-points"`;
+
+  beforeEach(() => {
+    runner = new SchematicTestRunner('test', require.resolve('../migrations.json'));
+    tree = new UnitTestTree(new EmptyTree());
+  });
+
+  it(`should add postinstall if scripts object is missing`, async() => {
+    tree.create(pkgJsonPath, JSON.stringify({}, null, 2));
+    await runMigration();
+    expect(tree.readContent(pkgJsonPath)).toContain(ngccPostinstall);
+  });
+
+  it(`should add postinstall if the script is missing`, async() => {
+    tree.create(pkgJsonPath, JSON.stringify({scripts: {}}, null, 2));
+    await runMigration();
+    expect(tree.readContent(pkgJsonPath)).toContain(ngccPostinstall);
+  });
+
+  it(`should prepend to postinstall if script already exists`, async() => {
+    tree.create(pkgJsonPath, JSON.stringify({scripts: {postinstall: 'do-something'}}, null, 2));
+    await runMigration();
+    expect(tree.readContent(pkgJsonPath))
+        .toContain(
+            `"postinstall": "ngcc --properties es2015 browser module main --first-only --create-ivy-entry-points && do-something"`);
+  });
+
+  it(`should not prepend to postinstall if script contains ngcc`, async() => {
+    tree.create(pkgJsonPath, JSON.stringify({scripts: {postinstall: 'ngcc --something'}}, null, 2));
+    await runMigration();
+    expect(tree.readContent(pkgJsonPath)).toContain(`"postinstall": "ngcc --something"`);
+    expect(tree.readContent(pkgJsonPath)).not.toContain(ngccPostinstall);
+    expect(tree.readContent(pkgJsonPath))
+        .not.toContain(
+            `ngcc --properties es2015 browser module main --first-only --create-ivy-entry-points`);
+  });
+
+  function runMigration() {
+    return runner.runSchematicAsync('migration-v9-postinstall-ngcc', {}, tree).toPromise();
+  }
+});