Make dotty use scala-infra for CI.

[DarkDimius]

@adriaanm Thanks for huge help in getting this working 👍

[retronym]

I think these scripts will need #!/bin/bash -e to ensure the job fails.

[adriaanm]

/rebuild

[retronym]

-no-colors will avoid ugly ANSI codes in the output.

[retronym]

Oh, I've just seen scala/scala-jenkins-infra#57.

[DarkDimius]

All the builds will fail until commits from this branch get in.
@odersky you need to update your setup to be in sync with b671424, unfortunatelly we cannot use cd .. in CI anymore, so scala/scala went to a subfolder.

[DarkDimius]

@odersky please review and merge it to unblock other PRs

[retronym]

@DarkDimius Not sure if you say my comment above, but I don't think you are correctly propagating the exit codes of the sbt process in your scripts.

I think these scripts will need #!/bin/bash -e to ensure the job fails.

[DarkDimius]

@retronym I can add -e, but can you explain why current script is incorrect?
While integrating this PR there were moments when partest failed, and failure was propagated.

[adriaanm]

The -e option matters when you have multiple steps. Currently, only the last one will influence the exit code, so intermediate ones could fail and you won't be notified.

[DarkDimius]

@adriaanm thanks for explaining!