Merge pull request #128 from conversionxl/docs-multi-file-mu-plugin-p…

…ackages

Document multi-file MU plugin packages support

docs/05-WP-Starter-Steps.md

@@ -114,6 +114,8 @@ There's no configuration affecting this step. The MU plugins to load are identif
 
 If no MU plugin packages are installed via Composer, the step is entirely skipped.
 
+WP Starter also supports packages containing multiple MU plugin, or any other purpose, PHP files. Because a multi-file package can contain unrelated PHP code, each MU plugin needs to have a WordPress standard `Plugin Name` header to have it included in MU plugin loader.
+
 ### `EnvExampleStep`
 
 It is a quite standard practice for applications that support `.env` files to provide a `.env.example` file as a blueprint of the available configurations.

src/Step/MuLoaderStep.php

@@ -110,7 +110,7 @@ public function run(Config $config, Paths $paths): int
 
         $built = $this->builder->build(
             $paths,
-            'wpstarter-mu-loader.php',
+            self::TARGET_FILE_NAME,
             ['MU_PLUGINS_LIST' => implode(', ', $muPluginsPaths)]
         );