adds jetpack safe mode feature

.gitignore

@@ -4,3 +4,5 @@ composer.lock
 .phpunit.result.cache
 .php-cs-fixer.cache
 .vscode
+.DS_Store
+.idea

README.md

@@ -103,6 +103,10 @@ This feature disables WordPress sticky posts entirely, including the ability to
 
 This feature disables WordPress from sending or receiving trackbacks or pingbacks.
 
+### `enabled_jetpack_safe_mode`
+
+This feature ensures Jetpack is in safe mode where applicable (currently Pantheon only).
+
 ### `force_two_factor_authentication`
 
 This feature forces users with `edit_posts` permissions to use two factor authentication (2fa) for their accounts.

src/alley/wp/alleyvate/features/class-enable-jetpack-safe-mode.php

@@ -0,0 +1,32 @@
+<?php
+/**
+ * Class file for Enable_Jetpack_Safe_Mode
+ *
+ * (c) Alley <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @package wp-alleyvate
+ */
+
+namespace Alley\WP\Alleyvate\Features;
+
+use Alley\WP\Types\Feature;
+
+/**
+ * Enables Jetpack safe mode for non-production environments, currently only for Pantheon.
+ */
+final class Enable_Jetpack_Safe_Mode implements Feature {
+	/**
+	 * Boot the feature.
+	 */
+	public function boot(): void {
+		if (
+			isset( $_ENV['PANTHEON_ENVIRONMENT'] ) &&
+			$_ENV['PANTHEON_ENVIRONMENT'] !== 'live'
+		) {
+			add_filter( 'jetpack_is_development_site', '__return_true' );
+		}
+	}
+}

src/alley/wp/alleyvate/load.php

@@ -65,6 +65,10 @@ function load(): void {
 			'disallow_file_edit',
 			new Features\Disallow_File_Edit(),
 		),
+		new Feature(
+			'enable_jetpack_safe_mode',
+			new Features\Enable_Jetpack_Safe_Mode(),
+		),
 		new Feature(
 			'login_nonce',
 			new Features\Login_Nonce(),

tests/alley/wp/alleyvate/features/test-enable-jetpack-safe-mode.php

@@ -0,0 +1,59 @@
+<?php
+/**
+ * Class file for Test_Enable_Jetpack_Safe_Mode
+ *
+ * (c) Alley <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @package wp-alleyvate
+ */
+
+declare( strict_types=1 );
+
+namespace Alley\WP\Alleyvate\Features;
+
+use Mantle\Testkit\Test_Case;
+
+/**
+ * Tests for the enabling of Jetpack safe mode.
+ */
+final class Test_Enabled_Jetpack_Safe_Mode extends Test_Case {
+
+	/**
+	 * Feature instance.
+	 *
+	 * @var Enable_Jetpack_Safe_Mode
+	 */
+	private Enable_Jetpack_Safe_Mode $feature;
+
+	/**
+	 * Set up.
+	 */
+	protected function setUp(): void {
+		parent::setUp();
+
+		$this->feature = new Enable_Jetpack_Safe_Mode();
+	}
+
+	/**
+	 * Test that the feature enabled Jetpack safe mode.
+	 */
+	public function test_enable_jetpack_safe_mode(): void {
+		$this->assertFalse( apply_filters( 'jetpack_is_development_site', false ), 'jetpack_is_development_site should not be true prior to boot.' );
+		$this->setEnvironment( 'test' );
+		$this->feature->boot();
+		$this->assertTrue( apply_filters( 'jetpack_is_development_site', false ), 'jetpack_is_development_site should be true after boot.' );
+	}
+
+	/**
+	 * Set the current environment value.
+	 *
+	 * @param string $environment The environment name to use.
+	 */
+	protected function setEnvironment( string $environment ): void {
+		putenv( 'PANTHEON_ENVIRONMENT=' . $environment ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.runtime_configuration_putenv
+		$_ENV['PANTHEON_ENVIRONMENT'] = $environment;
+	}
+}