Attempt to fix errors caused by using Composer-generated autoloaders when multiple versions of the library are loaded at the same time.

See #300. Apparently, when using the `files` autoloading mechanism, Composer will only include the files for one version of the library (i.e. the first one loaded). Let's see if we can fix that by switching to a `psr-0` autoloader. This requires a bunch of changes to the standalone autoloader and the factory registration process.

Puc/v4p7/Autoloader.php

@@ -16,12 +16,9 @@ if ( !class_exists('Puc_v4p7_Autoloader', false) ):
 
 			$this->libraryDir = realpath($this->rootDir . '../..') . '/';
 			$this->staticMap = array(
-				'PucReadmeParser' => 'vendor/readme-parser.php',
+				'PucReadmeParser' => 'vendor/PucReadmeParser.php',
-				'Parsedown' => 'vendor/ParsedownLegacy.php',
+				'Parsedown' => 'vendor/Parsedown.php',
 			);
-			if ( version_compare(PHP_VERSION, '5.3.0', '>=') ) {
-				$this->staticMap['Parsedown'] = 'vendor/Parsedown.php';
-			}
 
 			spl_autoload_register(array($this, 'autoload'));
 		}

Puc/v4p7/Factory.php

@@ -294,4 +294,25 @@ if ( !class_exists('Puc_v4p7_Factory', false) ):
 		}
 	}
 
+	//Register classes defined in this version with the factory.
+	foreach (
+		array(
+			'Plugin_UpdateChecker' => 'Puc_v4p7_Plugin_UpdateChecker',
+			'Theme_UpdateChecker'  => 'Puc_v4p7_Theme_UpdateChecker',
+
+			'Vcs_PluginUpdateChecker' => 'Puc_v4p7_Vcs_PluginUpdateChecker',
+			'Vcs_ThemeUpdateChecker'  => 'Puc_v4p7_Vcs_ThemeUpdateChecker',
+
+			'GitHubApi'    => 'Puc_v4p7_Vcs_GitHubApi',
+			'BitBucketApi' => 'Puc_v4p7_Vcs_BitBucketApi',
+			'GitLabApi'    => 'Puc_v4p7_Vcs_GitLabApi',
+		)
+		as $pucGeneralClass => $pucVersionedClass
+	) {
+		Puc_v4_Factory::addVersion($pucGeneralClass, $pucVersionedClass, '4.7');
+		//Also add it to the minor-version factory in case the major-version factory
+		//was already defined by another, older version of the update checker.
+		Puc_v4p7_Factory::addVersion($pucGeneralClass, $pucVersionedClass, '4.7');
+	}
+
 endif;

composer.json

@@ -17,6 +17,11 @@
 		"php": ">=5.2.0"
 	},
 	"autoload": {
-		"files": ["plugin-update-checker.php"]
+		"psr-0": {
+			"Puc_v4p7_" : "Puc/v4p7/",
+			"Puc_v4_" : "Puc/v4/",
+			"PucReadmeParser" : "vendor/",
+			"Parsedown" : "vendor/"
+		}
 	}
 }

plugin-update-checker.php

@@ -7,28 +7,8 @@
  * Released under the MIT license. See license.txt for details.
  */
 
-require dirname(__FILE__) . '/Puc/v4p7/Factory.php';
-require dirname(__FILE__) . '/Puc/v4/Factory.php';
 require dirname(__FILE__) . '/Puc/v4p7/Autoloader.php';
 new Puc_v4p7_Autoloader();
 
-//Register classes defined in this version with the factory.
+require dirname(__FILE__) . '/Puc/v4p7/Factory.php';
-foreach (
+require dirname(__FILE__) . '/Puc/v4/Factory.php';
-	array(
-		'Plugin_UpdateChecker' => 'Puc_v4p7_Plugin_UpdateChecker',
-		'Theme_UpdateChecker'  => 'Puc_v4p7_Theme_UpdateChecker',
-
-		'Vcs_PluginUpdateChecker' => 'Puc_v4p7_Vcs_PluginUpdateChecker',
-		'Vcs_ThemeUpdateChecker'  => 'Puc_v4p7_Vcs_ThemeUpdateChecker',
-
-		'GitHubApi'    => 'Puc_v4p7_Vcs_GitHubApi',
-		'BitBucketApi' => 'Puc_v4p7_Vcs_BitBucketApi',
-		'GitLabApi'    => 'Puc_v4p7_Vcs_GitLabApi',
-	)
-	as $pucGeneralClass => $pucVersionedClass
-) {
-	Puc_v4_Factory::addVersion($pucGeneralClass, $pucVersionedClass, '4.7');
-	//Also add it to the minor-version factory in case the major-version factory
-	//was already defined by another, older version of the update checker.
-	Puc_v4p7_Factory::addVersion($pucGeneralClass, $pucVersionedClass, '4.7');
-}