Initial implementation adding tool input ids to rename action. Whole thing needs some prettification and refactoring, still, but this will at least make it usable for folks.

lib/galaxy/jobs/actions/post.py

@@ -215,6 +215,15 @@ class RenameDatasetAction(DefaultJobAction):
                 p_str += "<label for='pja__"+pja.output_name+"__RenameDatasetAction__newname'>New output name:</label>\
                           <input type='text' name='pja__"+pja.output_name+"__RenameDatasetAction__newname' value=''/>";
             }
+            inputlist = [];
+            $.each(node.input_terminals, function(i, v){
+                inputlist.push(v.name);
+            });
+            if (inputlist !== []){
+                p_str += "Available inputs are: <strong>" + inputlist.join(', ') + "</strong>";
+            }else{
+                p_str += "No inputs are available for templating into this action.";
+            }
             """
         return get_form_template(cls.name, cls.verbose_name, form, "This action will rename the result dataset.")
 

static/scripts/galaxy.workflows.js

@@ -361,7 +361,7 @@ function add_node_for_module( type, title ) {
 // This function preloads how to display known pja's.
 function display_pja(pja, node) {
     // DBTODO SANITIZE INPUTS.
-    $("#pja_container").append( get_pja_form(pja) );
+    $("#pja_container").append( get_pja_form(pja, node) );
     $("#pja_container>.toolForm:last>.toolFormTitle>.buttons").click(function (){
         action_to_rem = $(this).closest(".toolForm", ".action_tag").children(".action_tag:first").text();
         $(this).closest(".toolForm").remove();

templates/webapps/galaxy/workflow/editor.mako

@@ -65,7 +65,7 @@
     %>
         // Post-job action vars.
         var pja_list = "${ActionBox.get_add_list()}",
-            get_pja_form = function(pja) {
+            get_pja_form = function(pja, node) {
                 var p_str = '';
                 // FIXME: this writes JS code; this logic should be codified in galaxy.workflows.js
                 ${ActionBox.get_forms(trans)}