fix: show invalid cron schedule error on cron status ui

[krrrr38]

Signed-off-by: krrrr38 k.kaizu38@gmail.com

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Problem

argo-workflows doen't support cron second, but it is possible to create from yaml. At that time cron workflow ui doesn't show error.

apiVersion: argoproj.io/v1alpha1
kind: CronWorkflow
metadata:
  name: my-cronworkflow-template-1
spec:
  schedule: "*/2 * * * * *"
  workflowSpec:
    entrypoint: whalesay-template
    workflowTemplateRef:
      name: my-workflow-template-1
    arguments:
      parameters:
        - name: message1
          value: hello from cron

How to solve?

Copy schedule validator from cron editor has schedule validator into pretty-schedule.

argo-workflows/ui/src/app/cron-workflows/components/schedule-validator.tsx

Lines 8 to 20 in d7a1e16

	if (schedule.split(' ').length === 6) {
	throw new Error('seconds are not supported');
	}
	return (
	<span>
	<SuccessIcon /> {x.toString(schedule)}
	</span>
	);
	} catch (e) {
	return (
	<span>
	<WarningIcon /> Schedule maybe invalid: {e.toString()}
	</span>