1.x

• Basic implementation of plugin initializer
• docs: improve documentation
• docs: improve API method documentation
• chore: improve composer package definition and readme
• feat(wip): allow private hooks calls
• improve into wp-hook and some additional unfinished things
• feat: moving toward actual implementation
• refactor: hookable driver should belong to separate package
• refactor: HookProvider also belongs to another package
• refactor: remove PluginHeaderData
• feat: add VERY simple command to cache plugin data
• refactor: rename header parser implementation
• refactor: simplify package
• refactor: remove unused tests
• chore: add static analysis
• feat: add initial bindings for wp-builder compatibility
• chore: add editorconfig
• fix: passthrough container definitions argument
• fix: use absolute cache path
• fix: don't use hook and global variable
• refactor: remove method, which can be replaced with get_path
• refactor: reorder definition loading, change config key name
• fix: correct cache path
• feat: add hook driver backward compatible with wp-builder
• fix: throw exception on failed load
• feat: add check for optional package
• chore: add config files
• feat: large rework, needs followup

src/Init.php

+<?php
+/**
+ * This file have to be compatible with PHP >=7.0 to gracefully handle outdated client's websites.
+ */
+
+namespace WPDesk\Init;
+
+use WPDesk\Init\Extension\LegacyExtension;
+use WPDesk\Init\Extension\BuiltinExtension;
+use WPDesk\Init\Extension\ConfigExtension;
+use WPDesk\Init\Extension\ExtensionsSet;
+use WPDesk\Init\Util\PhpFileLoader;
+use WPDesk\Init\Configuration\Configuration;
+
+final class Init {
+
+	private static $bootable = true;
+
+	/** @var Configuration */
+	private $config;
+
+	/**
+	 * @param string|array|Configuration $config
+	 */
+	public static function setup( $config ) {
+		$result = require __DIR__ . '/platform_check.php';
+
+		if ( $result === false ) {
+			self::$bootable = false;
+		}
+
+		return new self( $config );
+	}
+
+	/**
+	 * @param string|array|Configuration $config
+	 */
+	public function __construct( $config ) {
+		if ( $config instanceof Configuration ) {
+			$this->config = $config;
+		} elseif ( \is_array( $config ) ) {
+			$this->config = new Configuration( $config );
+		} elseif ( \is_string( $config ) ) {
+			$loader       = new PhpFileLoader();
+			$this->config = new Configuration( $loader->load( $config ) );
+		} else {
+			throw new \InvalidArgumentException( sprintf( 'Configuration must be either path to configuration file, array of configuration data or %s instance', Configuration::class ) );
+		}
+	}
+
+	/**
+	 * @param string|null $filename Filename of the booted plugin. May be null, if called from plugin's main file.
+	 */
+	public function boot( string? $filename = null ) {
+		if ( self::$bootable === false ) {
+			return;
+		}
+
+		if ( $filename === null ) {
+			$backtrace = \debug_backtrace( \DEBUG_BACKTRACE_IGNORE_ARGS, 1 );
+			$filename  = $backtrace[0]['file'];
+		}
+
+		$extensions = new ExtensionsSet(
+			new BuiltinExtension(),
+			new ConfigExtension(),
+			new ConditionalExtension()
+		);
+
+		if ( class_exists( \WPDesk_Plugin_Info::class ) ) {
+			$extensions->add( new LegacyExtension() );
+		}
+
+		$kernel = new Kernel( $filename, $this->config, $extensions );
+		$kernel->boot();
+	}
+}