Make sure config is loaded

Since all external dependencies are removed before uninstall is
called we have to make sure that everything required to handle
the uninstallation is loaded upfront.

This fixes issue #15

src/ConfiguredMediator.php

@@ -14,6 +14,18 @@
 
 abstract class ConfiguredMediator extends PluginBase
 {
+    /** @var \PharIo\ComposerDistributor\Config\Config */
+    private $config;
+
+    /**
+     * Config has to be loaded on instantiation because on uninstall all external dependencies are
+     * removed before `uninstall` is called and auto-loading any external phar-io dependencies then will fail.
+     */
+    public function __construct()
+    {
+        $this->config = Loader::loadFile($this->getDistributorConfig());
+    }
+
     abstract protected function getDistributorConfig(): string;
 
     public function uninstall(Composer $composer, IOInterface $io)
@@ -25,10 +37,8 @@ public function uninstall(Composer $composer, IOInterface $io)
 
     public function installOrUpdateFunction(PackageEvent $event): void
     {
-        $config    = Loader::loadFile($this->getDistributorConfig());
-        $installer = $this->createInstallerFromConfig($config, $event);
-
-        $installer->install($config->phars());
+        $installer = $this->createInstallerFromConfig($this->config, $event);
+        $installer->install($this->config->phars());
     }
 
     private function createInstallerFromConfig(Config $config, PackageEvent $event): Installer
@@ -58,24 +68,25 @@ private function createKeyDirectory(Config $config): KeyDirectory
 
     private function removePhars(): void
     {
-        $config = Loader::loadFile($this->getDistributorConfig());
         $binDir = $this->composer->getConfig()->get('bin-dir');
 
-        /** @var \PharIo\ComposerDistributor\File $phar */
-        foreach ($config->phars() as $phar) {
+        foreach ($this->config->phars()->getList() as $phar) {
             $this->deleteFile($phar, $binDir);
         }
     }
 
     private function deleteFile(File $phar, string $binDir): void
     {
         $pharLocation = $binDir . DIRECTORY_SEPARATOR . $phar->pharName();
+
         if (is_file($pharLocation)) {
             if (!is_writable($pharLocation)) {
-                $this->io->write(sprintf('can not remove phar \'%1$s\' (insufficient permissions)', $phar->pharName()));
+                $this->io->write(
+                    sprintf('    Can not remove phar \'%1$s\' (insufficient permissions)', $phar->pharName())
+                );
                 return;
             }
-            $this->io->write(sprintf('remove phar \'%1$s\'', $phar->pharName()));
+            $this->io->write(sprintf('    Removing phar \'%1$s\'', $phar->pharName()));
             unlink($pharLocation);
         }
     }