Add alter during Tuque connection construction.

includes/tuque_wrapper.inc

@@ -322,7 +322,21 @@ class IslandoraFedoraObject extends FedoraObject {
   }
 }
 
-class IslandoraRepositoryConnection extends RepositoryConnection {}
+class IslandoraRepositoryConnection extends RepositoryConnection {
+  /**
+   * Constructor.
+   *
+   * Invokes parent, but additionally invokes an alter to allow modules to
+   * effect the configuration of the connection.
+   */
+  public function __construct($url = NULL, $username = NULL, $password = NULL) {
+    if ($url === NULL) {
+      $url = static::FEDORA_URL;
+    }
+    parent::__construct($url, $username, $password);
+    drupal_alter('islandora_repository_connection_construction', $this);
+  }
+}
 
 class IslandoraFedoraApi extends FedoraApi {
 

islandora.api.php

@@ -873,3 +873,16 @@ function hook_islandora_edit_datastream_registry_alter(&$edit_registry, $context
     'url' => "islandora/custom_form/{$context['object']->id}/{$context['datastream']->id}"
   );
 }
+
+/**
+ * Permit configuration of connection parameters.
+ *
+ * @param IslandoraRepositoryConnection $instance
+ *   The connection being constructed. See the relevant Tuque ancestor classes
+ *   for the particulars.
+ *
+ * @see https://github.com/Islandora/tuque/blob/1.x/HttpConnection.php
+ */
+function hook_islandora_repository_connection_construction_alter($instance) {
+  $instance->userAgent = "Tuque/cURL";
+}