Add basic PHPStan linter

.distignore

@@ -14,5 +14,6 @@
 /package-lock.json
 /phpcs*
 /phpunit*
+/phpstan.*
 /readme.md
-/SECURITY.md
+/SECURITY.md

.gitignore

@@ -5,3 +5,4 @@
 /dist/
 /tests/logs/
 .phpunit.result.cache
+phpstan.neon

class-two-factor-compat.php

@@ -50,6 +50,6 @@ public function jetpack_rememberme( $rememberme ) {
 	 * @return boolean
 	 */
 	public function jetpack_is_sso_active() {
-		return ( method_exists( 'Jetpack', 'is_module_active' ) && Jetpack::is_module_active( 'sso' ) );
+		return ( class_exists( 'Jetpack' ) && method_exists( 'Jetpack', 'is_module_active' ) && Jetpack::is_module_active( 'sso' ) );
 	}
 }

class-two-factor-core.php

@@ -93,7 +93,7 @@ class Two_Factor_Core {
 	 * @since 0.1-dev
 	 */
 	public static function add_hooks( $compat ) {
-		add_action( 'init', array( __CLASS__, 'get_providers' ) );
+		add_action( 'init', array( __CLASS__, 'get_providers' ) ); // @phpstan-ignore return.void
 		add_action( 'wp_login', array( __CLASS__, 'wp_login' ), 10, 2 );
 		add_filter( 'wp_login_errors', array( __CLASS__, 'maybe_show_reset_password_notice' ) );
 		add_action( 'after_password_reset', array( __CLASS__, 'clear_password_reset_notice' ) );

composer.json

@@ -31,12 +31,14 @@
     "phpcompatibility/phpcompatibility-wp": "^2.1",
     "phpunit/phpunit": "^8.5|^9.6",
     "spatie/phpunit-watcher": "^1.23",
+    "szepeviktor/phpstan-wordpress": "^1.3",
     "wp-coding-standards/wpcs": "^3.1",
     "yoast/phpunit-polyfills": "^2.0"
   },
   "scripts": {
     "lint": "phpcs",
     "lint-compat": "phpcs -p --standard=PHPCompatibilityWP --runtime-set testVersion 7.2- --extensions=php --ignore='tests/,dist/,includes/Yubico/,vendor/,node_modules/' .",
+    "lint-phpstan": "phpstan analyse --memory-limit=1G",
     "test": "vendor/bin/phpunit",
     "test:watch": [
       "Composer\\Config::disableProcessTimeout",

package.json

@@ -12,6 +12,7 @@
     "build": "grunt build",
     "lint": "npm-run-all lint:*",
     "lint:php": "composer lint",
+    "lint:phpstan": "composer lint-phpstan",
     "lint:css": "wp-scripts lint-style ./user-edit.css ./providers/css/",
     "lint:js": "wp-scripts lint-js ./Gruntfile.js ./providers/js/",
     "format": "npm-run-all format:*",

phpstan.dist.neon

@@ -0,0 +1,10 @@
+includes:
+	- vendor/szepeviktor/phpstan-wordpress/extension.neon
+parameters:
+	level: 0
+	paths:
+		- includes
+		- providers
+		- class-two-factor-compat.php
+		- class-two-factor-core.php
+		- two-factor.php