Don't die on undated issues

app/gl/ganttify.py

@@ -16,18 +16,22 @@ def makeIssue(issue, isMilestone = False):
         end = date.fromisoformat(issue.due_date)
     except (TypeError, KeyError, AttributeError):
         if isMilestone:
-            logging.warning(f"Punting milestone: {issue.title}")
-            return None
-        try:
-            end = date.fromisoformat(issue.milestone["due_date"])
-        except (TypeError, KeyError, AttributeError):
-            logging.warning(f"Punting issue: {issue.title}, {issue.milestone}")
-            return None
+            logging.warning(f"Milestone without due_date: {issue.title}")
+            end = None
+        else:
+            try:
+                end = date.fromisoformat(issue.milestone["due_date"])
+            except (TypeError, KeyError, AttributeError):
+                logging.warning(f"Issue without due_date: {issue.title}, {issue.milestone}")
+                end = None
 
     try:
         start = date.fromisoformat(issue.start_date)
-    except AttributeError:
-        start = end - timedelta(issue.time_stats()["time_estimate"] * 3 / 86400)
+    except (TypeError, AttributeError):
+        if end:
+            start = end - timedelta(issue.time_stats()["time_estimate"] * 3 / 86400)
+        else:
+            start = None
 
     comp = 0
     try:
@@ -57,7 +61,7 @@ def makeIssue(issue, isMilestone = False):
         pClass  = cls,
         pName   = issue.title,
         pStart  = str(start),
-        pEnd    = end.isoformat(),
+        pEnd    = str(end),
         pLink   = issue.web_url,
         pGroup  = int(isMilestone),
         pParent = 0 if isMilestone or issue.milestone is None else issue.milestone['iid'] + MILESTONE_OFFSET,