Introduce feature flags

.travis.yml

@@ -47,18 +47,21 @@ jobs:
           php: 7.1
           env:
               - WP_VERSION=latest
+              - WOOCOMMERCE_BLOCKS_PHASE=experimental
           script:
               - phpunit
         - name: PHP 5.6/unit-tests/Latest WP
           php: 5.6
           env:
               - WP_VERSION=latest
+              - WOOCOMMERCE_BLOCKS_PHASE=experimental
           script:
               - phpunit
         - name: PHP Linting Check
           php: 7.1
           env:
               - WP_TRAVISCI=phpcs
+              - WOOCOMMERCE_BLOCKS_PHASE=experimental
           script:
               - npm run lint:php
         - name: Javascript Tests

src/Domain/Bootstrap.php

@@ -155,13 +155,11 @@ protected function remove_core_blocks() {
 	 * Define the global feature flag
 	 */
 	protected function define_feature_flag() {
-		$woo_options = parse_ini_file( __DIR__ . '/../../blocks.ini' );
-		$flag        = 'stable';
-		if ( is_array( $woo_options ) && (
-				'experimental' === $woo_options['woocommerce_blocks_phase'] ||
-				'stable' === $woo_options['woocommerce_blocks_phase']
-		) ) {
-			$flag = sanitize_key( $woo_options['woocommerce_blocks_phase'] );
+		if ( getenv( 'WOOCOMMERCE_BLOCKS_PHASE' ) ) {
+			$flag = getenv( 'WOOCOMMERCE_BLOCKS_PHASE' );
+		} else {
+			$woo_options = parse_ini_file( __DIR__ . '/../../blocks.ini' );
+			$flag        = is_array( $woo_options ) && 'experimental' === $woo_options['woocommerce_blocks_phase'] ? 'experimental' : 'stable';
 		}
 		define( 'WOOCOMMERCE_BLOCKS_PHASE', $flag );
 	}