// Add a link to restart installer if an error occured + session protection on reinstallation

install-dev/theme/js/process.js

@@ -78,6 +78,7 @@ function install_error(step, errors)
 	current_step = 0;
 	is_installing = false;
 
+	$('#error_process').show();
 	$('#process_step_'+step.key).show().addClass('fail');
 	$('#progress_bar .total .progress').stop().css('width', '0px');
 	$('#progress_bar .installing').hide();

install-dev/theme/view.css

@@ -693,7 +693,7 @@ ul#optional_update {list-style-type:none;}
 
 /* STEP 5 ******************************************/
 #install_process_form{
-    height: 260px;
+    min-height: 260px;
 }
 #progress_bar {
 	display: none;
@@ -763,7 +763,28 @@ ul#optional_update {list-style-type:none;}
 					#progress_bar ol.process_list li .error_log li {
 					    padding: 3px;
 					}
-			
+
+#error_process{
+    padding: 5px;
+    background-color: #FBE8D6;
+    border: 1px solid #666666;
+    margin-left: 37px;
+    margin-bottom: 20px;
+    display: none;
+}
+    #error_process h3{
+        color: red;
+    }
+    #error_process p{
+        margin-left: 20px;
+    }
+        #error_process p a{
+            font-weight: bold;
+        }
+        #error_process p a:hover{
+            text-decoration: underline;
+        }
+
 #install_process_success {
 	display: none;
 }

install-dev/theme/views/process.phtml

@@ -25,6 +25,11 @@ var process_percent = <?php echo 100 / count($this->process_steps) ?>;
 				</li>
 			<?php endforeach; ?>
 		</ol>
+
+		<div id="error_process">
+			<h3><?php echo $this->l('An error occured during installation ...') ?></h3>
+			<p><?php echo $this->l('You can use the links on the left column to go back to the previous steps, or restart the installation process by <a href="%s">clicking here</a>.', 'index.php?restart=true') ?></p>
+		</div>
 	</div>
 </div>