mkexp: added work-around for Jinja 2.8 bug when applying eval_ctx filters to...

mkexp: added work-around for Jinja 2.8 bug when applying eval_ctx filters to literals (eval_ctx and value are swapped)

mkexp

@@ -358,6 +358,9 @@ template_env.filters['list'] = list_singleton
 join_original = template_env.filters['join']
 @jinja2.evalcontextfilter
 def join_singleton(eval_ctx, x, *args, **kwargs):
+    # Workaround for 2.8 bug when applied to literals
+    if isinstance(x, jinja2.nodes.EvalContext):
+        (eval_ctx, x) = (x, eval_ctx)
     if '__iter__' in dir(x):
         return join_original(eval_ctx, x, *args, **kwargs)
     return x