Skip releases with empty schedule

ReTaSC should ignore releases in early Concept phases when the schedule
is not yet available, because "schedule" prerequisites would error out
on the missing schedule item.

src/retasc/models/prerequisites/schedule.py

@@ -26,10 +26,8 @@ class PrerequisiteSchedule(PrerequisiteBase):
         description="The name of the Product Pages schedule item."
     )
 
-    def _params(self, context) -> dict:
-        schedule = context.pp.release_schedules(context.release)
+    def _params(self, schedule: dict, context) -> dict:
         local_params = {"schedule": schedule}
-
         schedule_task = context.template.render(self.schedule_task, **local_params)
         task = schedule[schedule_task]
         local_params.update(
@@ -49,7 +47,12 @@ def update_state(self, context) -> ReleaseRuleState:
 
         Raises a HTTPError if the schedule task does not exist.
         """
-        local_params = self._params(context)
+        schedule = context.pp.release_schedules(context.release)
+        if schedule == {}:
+            context.report.set("pending_reason", "No schedule available yet")
+            return ReleaseRuleState.Pending
+
+        local_params = self._params(schedule, context)
         context.template.params.update(local_params)
         return ReleaseRuleState.Completed
 

tests/test_run.py

@@ -428,6 +428,20 @@ def test_run_rule_schedule_target_date(target_date, is_draft, result, mock_pp, f
     assert report.data["rhel"]["rhel-10.0"][rule.name]["state"] == state
 
 
+def test_run_rule_schedule_missing(mock_pp, factory):
+    mock_pp.release_schedules.return_value = {}
+    rule = factory.new_rule(prerequisites=[PrerequisiteSchedule(schedule_task="TASK")])
+
+    report = call_run()
+    assert report.data["rhel"]["rhel-10.0"][rule.name] == {
+        "Schedule('TASK')": {
+            "state": "Pending",
+            "pending_reason": "No schedule available yet",
+        },
+        "state": "Pending",
+    }
+
+
 @mark.parametrize(
     ("condition_expr", "result"),
     (