Fix for issue 2232: Many lines of "Could not find any stages to run" on run (#2272)

* Initial commit

* Put the tests back

* Remove unnecessary checks

* Remove unneeded check and fix test code

---------

Co-authored-by: Jason Song <i@wolfogre.com>

cmd/root.go

@@ -479,6 +479,11 @@ func newRunCommand(ctx context.Context, input *Input) func(*cobra.Command, []str
 			log.Debugf("Planning jobs for event: %s", eventName)
 			plan, plannerErr = planner.PlanEvent(eventName)
 		}
+		if plan != nil {
+			if len(plan.Stages) == 0 {
+				plannerErr = fmt.Errorf("Could not find any stages to run. View the valid jobs with `act --list`. Use `act --help` to find how to filter by Job ID/Workflow/Event Name")
+			}
+		}
 		if plan == nil && plannerErr != nil {
 			return plannerErr
 		}