Add missing file

Author: schlessera

src/ScaffoldPackageCommand.php

@@ -109,13 +109,14 @@ public function package( $args, $assoc_args ) {
 EOT;
 
 		$files_written = $this->create_files( array(
-			"{$package_dir}/.gitignore"              => file_get_contents( "{$package_root}/.gitignore" ),
-			"{$package_dir}/.editorconfig"           => file_get_contents( "{$package_root}/.editorconfig" ),
-			"{$package_dir}/.distignore"             => file_get_contents( "{$package_root}/.distignore" ),
-			"{$package_dir}/CONTRIBUTING.md"         => file_get_contents( "{$package_root}/CONTRIBUTING.md" ),
-			"{$package_dir}/wp-cli.yml"              => $wp_cli_yml,
-			"{$package_dir}/hello-world-command.php" => Utils\mustache_render( "{$template_path}/command.mustache", $assoc_args ),
-			"{$package_dir}/composer.json"           => Utils\mustache_render( "{$template_path}/composer.mustache", $assoc_args ),
+			"{$package_dir}/.gitignore"                => file_get_contents( "{$package_root}/.gitignore" ),
+			"{$package_dir}/.editorconfig"             => file_get_contents( "{$package_root}/.editorconfig" ),
+			"{$package_dir}/.distignore"               => file_get_contents( "{$package_root}/.distignore" ),
+			"{$package_dir}/CONTRIBUTING.md"           => file_get_contents( "{$package_root}/CONTRIBUTING.md" ),
+			"{$package_dir}/wp-cli.yml"                => $wp_cli_yml,
+			"{$package_dir}/hello-world-command.php"   => Utils\mustache_render( "{$template_path}/hello-world-command.mustache", $assoc_args ),
+			"{$package_dir}/src/HelloWorldCommand.php" => Utils\mustache_render( "{$template_path}/HelloWorldCommand.mustache", $assoc_args ),
+			"{$package_dir}/composer.json"             => Utils\mustache_render( "{$template_path}/composer.mustache", $assoc_args ),
 		), $force );
 
 		if ( empty( $files_written ) ) {

templates/HelloWorldCommand.mustache

@@ -0,0 +1,27 @@
+<?php
+
+namespace WP_CLI\HelloWorld;
+
+use WP_CLI;
+use WP_CLI_Command;
+
+/**
+ * Greets the world.
+ *
+ * ## EXAMPLES
+ *
+ *     # Greet the world.
+ *     $ wp hello-world
+ *     Success: Hello World!
+ */
+class HelloWorldCommand extends WP_CLI_Command {
+
+	/**
+	 * Invoke the command.
+	 *
+	 * @param array $args       Indexed array of positional arguments.
+	 * @param array $assoc_args Associative array of associative arguments.
+	public function __invoke( $args, $assoc_args ) {
+		WP_CLI::success( 'Hello World!' );
+	}
+}