Support use in WP-CLI packages

CHANGELOG.md

@@ -6,6 +6,12 @@ This library adheres to [Semantic Versioning](https://semver.org/) and [Keep a C
 
 Nothing yet.
 
+## 2.1.0
+
+### Changed
+
+- Support use of `WP_CLI_Feature` in WP-CLI packages.
+
 ## 2.0.0
 
 ### Changed

src/alley/wp/features/class-wp-cli-feature.php

@@ -8,6 +8,7 @@
 namespace Alley\WP\Features;
 
 use Alley\WP\Types\Feature;
+use WP_CLI;
 
 /**
  * Boot a feature only WP-CLI loads.
@@ -26,6 +27,16 @@ public function __construct(
 	 * Boot the feature.
 	 */
 	public function boot(): void {
-		add_action( 'cli_init', [ $this->origin, 'boot' ] );
+		if ( function_exists( 'add_action' ) ) {
+			add_action( 'cli_init', [ $this->origin, 'boot' ] );
+		} elseif ( class_exists( 'WP_CLI' ) ) {
+			/*
+			 * This is being invoked in a WP-CLI package or in a similar context where
+			 * WordPress hasn't yet been loaded.
+			 *
+			 * @see https://github.com/buddypress/wp-cli-buddypress/issues/18
+			 */
+			WP_CLI::add_hook( 'before_wp_load', [ $this->origin, 'boot' ] );
+		}
 	}
 }