makesite: Add the variable file_name

makesite.py

@@ -141,6 +141,8 @@ def make_pages(src, dst, layout, **params):
         if 'params' in content:
             page_params.update(**json.loads(open(content['params'], 'r').read()))
 
+        page_params['file_name'] = os.path.basename(src_path)
+            
         # Populate placeholders in content if content-rendering is enabled.
         if page_params.get('render') == 'yes':
             rendered_content = render(page_params['content'], **page_params)