fix(@angular/cli): add pnpm options to install package task

packages/angular/cli/commands/update-impl.ts

@@ -212,7 +212,7 @@ export class UpdateCommand extends Command<UpdateCommandSchema> {
     // Check if the current installed CLI version is older than the latest version.
     if (await this.checkCLILatestVersion(options.verbose, options.next)) {
       this.logger.warn(
-        'The installed Angular CLI version is older than the latest published version.\n' +
+        `The installed Angular CLI version is older than the latest ${options.next ? 'pre-release' : 'stable'} version.\n` +
         'Installing a temporary version to perform the update.',
       );
 

packages/angular/cli/tasks/install-package.ts

@@ -75,7 +75,7 @@ export function installTempPackage(
   process.on('exit', () => {
     try {
       rimraf.sync(tempPath);
-    } catch {}
+    } catch { }
   });
 
   // setup prefix/global modules path
@@ -145,19 +145,30 @@ export function runTempPackageBin(
 }
 
 function getPackageManagerArguments(packageManager: PackageManager): PackageManagerOptions {
-  return packageManager === PackageManager.Yarn
-    ? {
+  switch (packageManager) {
+    case PackageManager.Yarn:
+      return {
         silent: '--silent',
         saveDev: '--dev',
         install: 'add',
         prefix: '--modules-folder',
         noLockfile: '--no-lockfile',
-      }
-    : {
+      };
+    case PackageManager.Pnpm:
+      return {
+        silent: '--silent',
+        saveDev: '--save-dev',
+        install: 'add',
+        prefix: '--prefix',
+        noLockfile: '--no-lockfile',
+      };
+    default:
+      return {
         silent: '--quiet',
         saveDev: '--save-dev',
         install: 'install',
         prefix: '--prefix',
         noLockfile: '--no-package-lock',
       };
+  }
 }

packages/schematics/update/update/schema.json

@@ -64,7 +64,9 @@
       "default": "npm",
       "enum": [
         "npm",
-        "yarn"
+        "yarn",
+        "cnpm",
+        "pnpm"
       ]
     },
     "migrateExternal": {