Feat: Add pause condition in pipeline run

[FogDong]

Changes

Feat: Add pause condition in pipeline run.

The pause condition will be valid in runAfter pipelines.
When users change the pipeline run's status to paused, after the
completion of the current pipeline, the next pipeline that runs after
the previous one will be paused.

The way we handle pause is similar to the way we handle cancel.

Reference #2217

/cc @withlin

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Release Notes

  Feat: Add pause condition in pipeline run.

  The pause condition will be valid in runAfter pipelines.
  When users change the pipeline run's status to paused, after the
  completion of the current pipeline, the next pipeline that runs after
  the previous one will be paused.

[tekton-robot]

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[tekton-robot]

Hi @FogDong. Thanks for your PR.

I'm waiting for a tektoncd member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[FogDong]

/kind feature

[imjasonh]

/hold

This is likely something we'll want a TEP for, so we have a chance to discuss alternatives/trade-offs before proposing code changes.

There's already a proposed TEP for pausing PipelineRuns, which might end up overlapping with your proposed feature a lot! Or it might not. Or it might overlap in a confusing/difficult way! Anyway let's discuss more in a TEP 😄

[jbarrick-mesosphere]

There's already a proposed TEP for pausing PipelineRuns, which might end up overlapping with your proposed feature a lot! Or it might not. Or it might overlap in a confusing/difficult way! Anyway let's discuss more in a TEP smile

This is exactly what was proposed in my TEP.

Thanks @FogDong !

[tekton-robot]

@FogDong: PR needs rebase.

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[FogDong]

This PR has been cherry picked in another merged PR.

/close

[tekton-robot]

@FogDong: Closed this PR.

In response to this:

This PR has been cherry picked in another merged PR.

/close

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