Bundled commands should mention they're included with WP-CLI

features/scaffold-package-readme.feature

@@ -200,3 +200,38 @@ Feature: Scaffold a README.md file for an existing package
       """
       Error: Missing one or more commands defined in composer.json -> extras -> commands.
       """
+
+  Scenario: README for a bundled command
+    Given an empty directory
+    And a foo/composer.json file:
+      """
+      {
+          "name": "runcommand/profile",
+          "authors": [],
+          "minimum-stability": "dev",
+          "autoload": {
+              "files": [ "command.php" ]
+          },
+          "require": {
+          },
+          "require-dev": {
+              "wp-cli/wp-cli": "*",
+              "behat/behat": "~2.5"
+          },
+          "extra": {
+              "bundled": true
+          }
+      }
+      """
+
+    When I run `wp scaffold package-readme foo`
+    Then the foo/README.md file should exist
+    And the foo/README.md file should contain:
+      """
+      runcommand/profile
+      ==================
+      """
+    And the foo/README.md file should contain:
+      """
+      This package is included with WP-CLI itself
+      """

src/ScaffoldPackageCommand.php

@@ -300,9 +300,15 @@ public function package_readme( $args, $assoc_args ) {
 				'heading'      => $section_heading,
 			);
 		}
+		$bundled = ! empty( $composer_obj['extra']['bundled'] );
 		foreach( array( 'using', 'installing', 'contributing' ) as $key ) {
 			if ( isset( $readme_sections[ $key ] ) ) {
-				$readme_sections[ $key ]['body'] = dirname( dirname( __FILE__ ) ) . '/templates/readme-' . $key . '.mustache';
+				$file = dirname( dirname( __FILE__ ) ) . '/templates/readme-' . $key . '.mustache';
+				if ( $bundled
+					&& file_exists( dirname( dirname( __FILE__ ) ) . '/templates/readme-' . $key . '-bundled.mustache' ) ) {
+					$file = dirname( dirname( __FILE__ ) ) . '/templates/readme-' . $key . '-bundled.mustache';
+				}
+				$readme_sections[ $key ]['body'] = $file;
 			}
 		}
 

templates/readme-installing-bundled.mustache

@@ -0,0 +1,5 @@
+This package is included with WP-CLI itself, no additional installation necessary.
+
+To install the latest version of this package over what's included in WP-CLI, run:
+
+    wp package install git@github.com:{{package_name}}.git