Rerun button should not create a new pipeline run

[EnriqueL8]

Expected Behavior

If I want to rerun a pipeline, it should rerun this existing one and not create a new one. I end up with a very large amount of pipeline runs after debugging erros.

Actual Behavior

The rerun button creates a new pipeline run with a different generated name.

[AlanGreene]

@EnriqueL8 thanks for opening an issue, however this is working as intended.

In Tekton, a PipelineRun is a single instance of execution of a Pipeline definition. See https://github.com/tektoncd/pipeline/blob/master/docs/pipelineruns.md for some more info. Rerunning an existing PipelineRun via the dashboard is a shortcut to create a new PipelineRun with the same inputs.

Also see this comment on the pipeline repo that describes the same situation for TaskRuns: tektoncd/pipeline#1302 (comment)