Add instructions to add custom scenarios & don't fail when none exist

README.md

@@ -128,6 +128,17 @@ INSTALLED_APPS += ('mentoring',)
 DATABASES['default']['NAME'] = 'workbench.sqlite'
 ```
 
+Adding custom scenarios in the workbench
+----------------------------------------
+
+Create the `templates/xml` and add XML scenarios to it - all files with the `*.xml` extension will be
+automatically loaded by the workbench:
+
+```bash
+$ mkdir templates/xml
+$ cat > templates/xml/my_mentoring_scenario.xml
+```
+
 Starting the workbench
 ----------------------
 

mentoring/utils.py

@@ -76,6 +76,7 @@ def get_scenarios_from_path(scenarios_path, include_identifier=False):
     scenarios_fullpath = os.path.join(base_fullpath, scenarios_path)
 
     scenarios = []
+    if os.path.isdir(scenarios_fullpath):
         for template in os.listdir(scenarios_fullpath):
             if not template.endswith('.xml'):
                 continue