Creating a calendar event triggers jobs

[henrytk]

If you have a pipeline which triggers jobs from calendar events and adds calendar events, then the job triggered by an event will trigger every time a calendar event is created, regardless of whether that calendar event is currently happening or not.

Steps to reproduce

• Create a pipeline based on the README. You will need to edit the times of the events.
• Create a job in the calendar which is currently happening. You will see that the job triggers as expected.
• Run the job that creates an event. Make sure it doesn't create an event which is currently happening (set it in the future some time).
• You will observe the other job, which is designed to trigger at a specific time for a specific calendar event, will trigger.

Cause

This seems to be the way Concourse handles a 'version' of an event. By creating an event you create a new 'version' of that resource, but there is no logic to say whether the created resource version is actually valid for input to a pipeline.