To get around undefined error

NParsonsMO · NParsonsMO · commit c6d24f474bf5 · 2026-06-18T11:50:07.000+01:00
diff --git a/CMEW/flow.cylc b/CMEW/flow.cylc
@@ -138,7 +138,7 @@
 
     [[get_esmval_branch]]
         [[[environment]]]
-            ESMVALTOOL_BRANCH = {{ ESMVALTOOL_BRANCH }}
+            ESMVALTOOL_BRANCH = {{ ESMVALTOOL_BRANCH | default("") }}
 
     [[housekeeping]]
 
