Upload-artifact: Upload transient artifact

[emilianbold]

Hello,

Some of my artifacts are transient. They transmit data between jobs but I don't want to keep them.

Ideally, I would like to use actions/upload-artifact like this:

- name: Upload artifact
  uses: actions/upload-artifact@v2
  with:
    name: myartifact
    path: mypath
    temporary: true

The temporary (or transient) flag would mark the artifact as transient and automatically delete it when the workflow is done.

[eine]

Ref #5.

[konradpabjan]

Related (I think this could be more useful if the sole purpose is to transmit data between jobs): https://github.com/actions/download-artifact/issues/20

If retention policies do get added, I'm thinking we'll be able to support this scenario. An expiration time of 0 or something could be used to denote that that artifact should be immediately deleted after the run is complete: https://github.com/actions/upload-artifact/issues/34

[ahdbilal]

You can now set artifact and log retention duration to 1 day and we will clean and delete artifacts right after they expire. You can learn more about this feature here. Feedback is welcome!