refactor(@angular/cli): correct package manager cache key and add barrel file

packages/angular/cli/src/package-managers/index.ts

@@ -0,0 +1,13 @@
+/**
+ * @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.dev/license
+ */
+
+export { createPackageManager } from './factory';
+export type { PackageManagerName } from './package-manager-descriptor';
+export { PackageManager } from './package-manager';
+export type * from './package-metadata';
+export type { InstalledPackage } from './package-tree';

packages/angular/cli/src/package-managers/package-manager.ts

@@ -35,6 +35,7 @@ const METADATA_FIELDS = ['name', 'dist-tags', 'versions', 'time'] as const;
 const MANIFEST_FIELDS = [
   'name',
   'version',
+  'deprecated',
   'dependencies',
   'peerDependencies',
   'devDependencies',
@@ -337,7 +338,7 @@ export class PackageManager {
     return this.#fetchAndParse(
       commandArgs,
       (stdout, logger) => this.descriptor.outputParsers.getRegistryMetadata(stdout, logger),
-      { ...options, cache: this.#metadataCache, cacheKey: packageName },
+      { ...options, cache: this.#metadataCache, cacheKey },
     );
   }
 
@@ -369,7 +370,7 @@ export class PackageManager {
     return this.#fetchAndParse(
       commandArgs,
       (stdout, logger) => this.descriptor.outputParsers.getPackageManifest(stdout, logger),
-      { ...options, cache: this.#manifestCache, cacheKey: specifier },
+      { ...options, cache: this.#manifestCache, cacheKey },
     );
   }
 

packages/angular/cli/src/package-managers/package-metadata.ts

@@ -80,6 +80,9 @@ export interface PackageManifest {
   /** The version of the package. */
   version: string;
 
+  /** A message indicating that the package version is deprecated. */
+  deprecated?: string;
+
   /** A mapping of production dependencies. */
   dependencies?: Record<string, string>;