Check including libraries already in wp core including jquery

.distignore

@@ -23,6 +23,7 @@ tests
 .gitignore
 .nvmrc
 .phpunit.result.cache
+.typos.toml
 .wp-env.json
 .wp-env.override.json
 behat.yml

.gitattributes

@@ -15,6 +15,7 @@
 /.gherkin-lintignore export-ignore
 /.gherkin-lintrc export-ignore
 /.nvmrc export-ignore
+/.typos.toml export-ignore
 /.wp-env.json export-ignore
 /composer.lock export-ignore
 /package.json export-ignore

.typos.toml

@@ -0,0 +1,4 @@
+[default]
+extend-ignore-re = [
+    "ba",
+]

includes/Checker/Checks/Plugin_Repo/File_Type_Check.php

@@ -24,13 +24,14 @@ class File_Type_Check extends Abstract_File_Check {
 	use Amend_Check_Result;
 	use Stable_Check;
 
-	const TYPE_COMPRESSED  = 1;
-	const TYPE_PHAR        = 2;
-	const TYPE_VCS         = 4;
-	const TYPE_HIDDEN      = 8;
-	const TYPE_APPLICATION = 16;
-	const TYPE_BADLY_NAMED = 32;
-	const TYPE_ALL         = 63; // Same as all of the above with bitwise OR.
+	const TYPE_COMPRESSED   = 1;
+	const TYPE_PHAR         = 2;
+	const TYPE_VCS          = 4;
+	const TYPE_HIDDEN       = 8;
+	const TYPE_APPLICATION  = 16;
+	const TYPE_BADLY_NAMED  = 32;
+	const TYPE_LIBRARY_CORE = 64;
+	const TYPE_ALL          = 127; // Same as all of the above with bitwise OR.
 
 	/**
 	 * Bitwise flags to control check behavior.
@@ -95,6 +96,9 @@ protected function check_files( Check_Result $result, array $files ) {
 			// Check for badly named files.
 			$this->look_for_badly_named_files( $result, $files );
 		}
+		if ( $this->flags & self::TYPE_LIBRARY_CORE ) {
+			$this->look_for_library_core_files( $result, $files );
+		}
 	}
 
 	/**
@@ -294,6 +298,80 @@ function ( $file ) use ( $plugin_path ) {
 		}
 	}
 
+	/**
+	 * Looks for library core files and amends the given result with an error if found.
+	 *
+	 * @since 1.3.0
+	 *
+	 * @param Check_Result $result The check result to amend, including the plugin context to check.
+	 * @param array        $files  List of absolute file paths.
+	 */
+	protected function look_for_library_core_files( Check_Result $result, array $files ) {
+		// Known libraries that are part of WordPress core.
+		// https://meta.trac.wordpress.org/browser/sites/trunk/api.wordpress.org/public_html/core/credits/wp-59.php#L739 .
+		$look_known_libraries_core_services = array(
+			'(?<![\.|-])jquery(-[0-9|\.]*)?(\.slim)?(\.min)?\.js(?!\/)',
+			'jquery-ui(-[0-9|\.]*)?(\.slim)?(\.min)?\.js(?!\/)',
+			'jquery.color(\.slim)?(\.min)?\.js(?!\/)',
+			'jquery.ui.touch-punch(?!\/)',
+			'jquery.hoverintent(?!\/)',
+			'jquery.imgareaselect(?!\/)',
+			'jquery.hotkeys(?!\/)',
+			'jquery.ba-serializeobject(?!\/)',
+			'jquery.query-object(?!\/)',
+			'jquery.suggest(?!\/)',
+			'polyfill(\.min)?\.js(?!\/)',
+			'iris(\.min)?\.js(?!\/)',
+			'backbone(\.min)?\.js(?!\/)',
+			'clipboard(\.min)?\.js(?!\/)',
+			'closest(\.min)?\.js(?!\/)',
+			'codemirror(\.min)?\.js(?!\/)',
+			'formdata(\.min)?\.js(?!\/)',
+			'json2(\.min)?\.js(?!\/)',
+			'lodash(\.min)?\.js(?!\/)',
+			'masonry(\.pkgd)(\.min)?\.js(?!\/)',
+			'mediaelement-and-player(\.min)?\.js(?!\/)',
+			'moment(\.min)?\.js(?!\/)',
+			'plupload(\.full)(\.min)?\.js(?!\/)',
+			'thickbox(\.min)?\.js(?!\/)',
+			'twemoji(\.min)?\.js(?!\/)',
+			'underscore([\.|-]min)?\.js(?!\/)',
+			'moxie(\.min)?\.js(?!\/)',
+			'zxcvbn(\.min)?\.js(?!\/)',
+			'getid3\.php(?!\/)',
+			'pclzip\.lib\.php(?!\/)',
+			'PasswordHash\.php(?!\/)',
+			'PHPMailer\.php(?!\/)',
+			'SimplePie\.php(?!\/)',
+		);
+
+		$combined_pattern = '/(' . implode( ')|(', $look_known_libraries_core_services ) . ')/i';
+
+		$plugin_path = $result->plugin()->path();
+
+		$files = array_map(
+			function ( $file ) use ( $plugin_path ) {
+				return str_replace( $plugin_path, '', $file );
+			},
+			$files
+		);
+
+		foreach ( $files as $file ) {
+			if ( preg_match( $combined_pattern, $file ) ) {
+				$this->add_result_error_for_file(
+					$result,
+					__( 'Library files that are already in the WordPress core are not permitted.', 'plugin-check' ),
+					'library_core_files',
+					$file,
+					0,
+					0,
+					'',
+					8
+				);
+			}
+		}
+	}
+
 	/**
 	 * Gets the description for the check.
 	 *
@@ -304,7 +382,7 @@ function ( $file ) use ( $plugin_path ) {
 	 * @return string Description.
 	 */
 	public function get_description(): string {
-		return __( 'Detects the usage of hidden and compressed files, VCS directories, application files and badly named files.', 'plugin-check' );
+		return __( 'Detects the usage of hidden and compressed files, VCS directories, application files, badly named files and Library Core Files.', 'plugin-check' );
 	}
 
 	/**

tests/phpunit/testdata/plugins/test-plugin-file-type-library-core-errors/PHPMailer.php

@@ -0,0 +1 @@
+<?php

tests/phpunit/testdata/plugins/test-plugin-file-type-library-core-errors/jquery.js

@@ -0,0 +1 @@
+// For testing purposes, this file is empty.

tests/phpunit/testdata/plugins/test-plugin-file-type-library-core-errors/load.php

@@ -0,0 +1,17 @@
+<?php
+/**
+ * Plugin Name: Test Plugin File Type Library Core Files
+ * Plugin URI: https://github.com/WordPress/plugin-check
+ * Description: Some plugin description.
+ * Author: WordPress Performance Team
+ * Author URI: https://make.wordpress.org/plugins/
+ * License: GPLv2 or later
+ * License URI: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * Text Domain: test-plugin-file-type-library-core-errors
+ *
+ * @package test-plugin-file-type-library-core-errors
+ */
+
+/**
+ * Plugin folder contains a library core file which is not allowed.
+ */

tests/phpunit/tests/Checker/Checks/File_Type_Check_Tests.php

@@ -127,4 +127,27 @@ public function test_run_with_badly_named_errors() {
 		$this->assertArrayHasKey( 0, $errors['badly|file%name!@#$%^&*()+=[]{};:"\'<>,?|`~.php'][0] );
 		$this->assertCount( 1, wp_list_filter( $errors['badly|file%name!@#$%^&*()+=[]{};:"\'<>,?|`~.php'][0][0], array( 'code' => 'badly_named_files' ) ) );
 	}
+
+	public function test_run_with_library_core_errors() {
+		$check_context = new Check_Context( UNIT_TESTS_PLUGIN_DIR . 'test-plugin-file-type-library-core-errors/load.php' );
+		$check_result  = new Check_Result( $check_context );
+
+		$check = new File_Type_Check( File_Type_Check::TYPE_LIBRARY_CORE );
+		$check->run( $check_result );
+
+		$errors = $check_result->get_errors();
+
+		$this->assertNotEmpty( $errors );
+		$this->assertEquals( 2, $check_result->get_error_count() );
+
+		// Check for core PHPMailer.
+		$this->assertArrayHasKey( 0, $errors['PHPMailer.php'] );
+		$this->assertArrayHasKey( 0, $errors['PHPMailer.php'][0] );
+		$this->assertCount( 1, wp_list_filter( $errors['PHPMailer.php'][0][0], array( 'code' => 'library_core_files' ) ) );
+
+		// Check for core jquery.
+		$this->assertArrayHasKey( 0, $errors['jquery.js'] );
+		$this->assertArrayHasKey( 0, $errors['jquery.js'][0] );
+		$this->assertCount( 1, wp_list_filter( $errors['jquery.js'][0][0], array( 'code' => 'library_core_files' ) ) );
+	}
 }