gutenberg.php

<?php
/**
 * Plugin Name: Gutenberg
 * Plugin URI: https://github.com/WordPress/gutenberg
 * Description: Printing since 1440. This is the development plugin for the new block editor in core.
 * Version: 5.5.0
 * Author: Gutenberg Team
 * Text Domain: gutenberg
 *
 * @package gutenberg
 */

### BEGIN AUTO-GENERATED DEFINES
define( 'GUTENBERG_DEVELOPMENT_MODE', true );
### END AUTO-GENERATED DEFINES

gutenberg_pre_init();

/**
 * Gutenberg's Menu.
 *
 * Adds a new wp-admin menu page for the Gutenberg editor.
 *
 * @since 0.1.0
 */
function gutenberg_menu() {
	global $submenu;

	add_menu_page(
		'Gutenberg',
		'Gutenberg',
		'edit_posts',
		'gutenberg',
		'',
		'dashicons-edit'
	);

	add_submenu_page(
		'gutenberg',
		__( 'Demo', 'gutenberg' ),
		__( 'Demo', 'gutenberg' ),
		'edit_posts',
		'gutenberg'
	);

	add_submenu_page(
		'gutenberg',
		__( 'Widgets (beta)', 'gutenberg' ),
		__( 'Widgets (beta)', 'gutenberg' ),
		'edit_theme_options',
		'gutenberg-widgets',
		'the_gutenberg_widgets'
	);

	if ( current_user_can( 'edit_posts' ) ) {
		$submenu['gutenberg'][] = array(
			__( 'Support', 'gutenberg' ),
			'edit_posts',
			__( 'https://wordpress.org/support/plugin/gutenberg', 'gutenberg' ),
		);

		$submenu['gutenberg'][] = array(
			__( 'Documentation', 'gutenberg' ),
			'edit_posts',
			'https://wordpress.org/gutenberg/handbook/',
		);
	}
}
add_action( 'admin_menu', 'gutenberg_menu' );

/**
 * Display a version notice and deactivate the Gutenberg plugin.
 *
 * @since 0.1.0
 */
function gutenberg_wordpress_version_notice() {
	echo '<div class="error"><p>';
	/* translators: %s: Minimum required version */
	printf( __( 'Gutenberg requires WordPress %s or later to function properly. Please upgrade WordPress before activating Gutenberg.', 'gutenberg' ), '5.0.0' );
	echo '</p></div>';

	deactivate_plugins( array( 'gutenberg/gutenberg.php' ) );
}

/**
 * Display a build notice.
 *
 * @since 0.1.0
 */
function gutenberg_build_files_notice() {
	echo '<div class="error"><p>';
	_e( 'Gutenberg development mode requires files to be built. Run <code>npm install</code> to install dependencies, <code>npm run build</code> to build the files or <code>npm run dev</code> to build the files and watch for changes. Read the <a href="https://github.com/WordPress/gutenberg/blob/master/CONTRIBUTING.md">contributing</a> file for more information.', 'gutenberg' );
	echo '</p></div>';
}

/**
 * Verify that we can initialize the Gutenberg editor , then load it.
 *
 * @since 1.5.0
 */
function gutenberg_pre_init() {
	if ( defined( 'GUTENBERG_DEVELOPMENT_MODE' ) && GUTENBERG_DEVELOPMENT_MODE && ! file_exists( dirname( __FILE__ ) . '/build/blocks' ) ) {
		add_action( 'admin_notices', 'gutenberg_build_files_notice' );
		return;
	}

	// Get unmodified $wp_version.
	include ABSPATH . WPINC . '/version.php';

	// Strip '-src' from the version string. Messes up version_compare().
	$version = str_replace( '-src', '', $wp_version );

	if ( version_compare( $version, '5.0.0', '<' ) ) {
		add_action( 'admin_notices', 'gutenberg_wordpress_version_notice' );
		return;
	}

	require_once dirname( __FILE__ ) . '/lib/load.php';
}