Add prefixing check

.typos.toml

@@ -1,6 +1,10 @@
 [default]
 extend-ignore-re = [
+    "avail_post_stati",
     "ba",
+    "MAGPIE_INITALIZED",
+    "setted_site_transient",
+    "setted_transient",
 ]
 
 [files]

composer.json

@@ -9,6 +9,7 @@
     "automattic/vipwpcs": "^3.0.0",
     "composer/installers": "^2.2",
     "dealerdirect/phpcodesniffer-composer-installer": "^1.0.0",
+    "nikic/php-parser": "^4",
     "plugin-check/phpcs-sniffs": "@dev",
     "wp-coding-standards/wpcs": "^3.2.0"
   },
@@ -58,7 +59,8 @@
     },
     "platform": {
       "php": "7.4"
-    }
+    },
+    "sort-packages": true
   },
   "scripts": {
     "behat": "BEHAT_FEATURES_FOLDER=tests/behat/features run-behat-tests",

includes/Checker/Checks/Plugin_Repo/Prefixing_Check.php

@@ -0,0 +1,92 @@
+<?php
+/**
+ * Class Prefixing_Check.
+ *
+ * @package plugin-check
+ */
+
+namespace WordPress\Plugin_Check\Checker\Checks\Plugin_Repo;
+
+use WordPress\Plugin_Check\Checker\Check_Categories;
+use WordPress\Plugin_Check\Checker\Check_Result;
+use WordPress\Plugin_Check\Checker\Checks\Abstract_PHP_CodeSniffer_Check;
+use WordPress\Plugin_Check\Traits\Amend_Check_Result;
+use WordPress\Plugin_Check\Traits\Prefix_Utils;
+use WordPress\Plugin_Check\Traits\Stable_Check;
+
+/**
+ * Check for prefixing.
+ *
+ * @since 1.7.0
+ */
+class Prefixing_Check extends Abstract_PHP_CodeSniffer_Check {
+
+	use Amend_Check_Result;
+	use Prefix_Utils;
+	use Stable_Check;
+
+	/**
+	 * Gets the categories for the check.
+	 *
+	 * Every check must have at least one category.
+	 *
+	 * @since 1.7.0
+	 *
+	 * @return array The categories for the check.
+	 */
+	public function get_categories() {
+		return array( Check_Categories::CATEGORY_PLUGIN_REPO );
+	}
+
+	/**
+	 * Returns an associative array of arguments to pass to PHPCS.
+	 *
+	 * @since 1.7.0
+	 *
+	 * @param Check_Result $result The check result to amend, including the plugin context to check.
+	 * @return array An associative array of PHPCS CLI arguments.
+	 */
+	protected function get_args( Check_Result $result ) {
+		$args = array(
+			'extensions' => 'php',
+			'standard'   => 'WordPress',
+			'sniffs'     => 'WordPress.NamingConventions.PrefixAllGlobals',
+		);
+
+		$prefixes = $this->get_potential_prefixes( $result );
+
+		if ( ! empty( $prefixes ) ) {
+			$args['runtime-set'] = array(
+				'prefixes' => implode( ',', $prefixes ),
+			);
+		}
+
+		return $args;
+	}
+
+	/**
+	 * Gets the description for the check.
+	 *
+	 * Every check must have a short description explaining what the check does.
+	 *
+	 * @since 1.7.0
+	 *
+	 * @return string Description.
+	 */
+	public function get_description(): string {
+		return __( 'Checks plugin for unique prefixing for everything the plugin defines in the public namespace.', 'plugin-check' );
+	}
+
+	/**
+	 * Gets the documentation URL for the check.
+	 *
+	 * Every check must have a URL with further information about the check.
+	 *
+	 * @since 1.7.0
+	 *
+	 * @return string The documentation URL.
+	 */
+	public function get_documentation_url(): string {
+		return __( 'https://make.wordpress.org/plugins/handbook/performing-reviews/review-checklist/#code', 'plugin-check' );
+	}
+}

includes/Checker/Default_Check_Repository.php

@@ -96,6 +96,7 @@ private function register_default_checks() {
 				'non_blocking_scripts'       => new Checks\Performance\Non_Blocking_Scripts_Check(),
 				'offloading_files'           => new Checks\Plugin_Repo\Offloading_Files_Check(),
 				'setting_sanitization'       => new Checks\Plugin_Repo\Setting_Sanitization_Check(),
+				'prefixing'                  => new Checks\Plugin_Repo\Prefixing_Check(),
 			)
 		);