Commits on May 10, 2021

1. TEP-0063: Workspace Dependencies …

   In this PR, we discuss the motivation, goals, non-goals and requirements
   for `Workspace` dependencies so that we can align on the problem before
   exploring the proposal and alternatives later
   
   `Tasks` can have either resource dependencies or ordering dependencies
   between them. Resource dependencies are based on `Results` and
   `Workspaces`, while ordering dependencies are defined using `runAfter`
   to sequence `Tasks`.
   
   Today, users cannot specify resource dependencies based on `Workspaces`,
   that is, a `Task` should execute and use a given `Workspace` before
   another `Task` executes and uses the same `Workspace`. We need to
   provide a way for users to specify resource dependencies based on
   `Workspaces` to ensure that failure and skipping strategies for
   common CI/CD use cases work and users don't get unexpected `Pipeline`
   failures when we roll out those features.
   
   Failure and skipping strategies:
   - [TEP-0059: Skip Guarded Task Only](https://github.com/tektoncd/community/blob/main/teps/0059-skip-guarded-task-only.md)
   - [TEP-0050: Ignore Task Failures](https://github.com/tektoncd/community/blob/main/teps/0050-ignore-task-failures.md)
   
   Issue: tektoncd/pipeline#3109

   

   jerop committed May 10, 2021
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