Redirect docker buildkit stderr to info

[LeonardMeyer]

Fixes #1371
First draft, let me know what you think.

Tested it on my project, it works fine now.

[lightbend-cla-validator]

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[LeonardMeyer]

Confused about the failing formatting. When I ran scalafmt locally it formatted a lot of files, not just the one I modified...

[muuki88]

A small nit pick, but otherwise this looks good

[muuki88]

maybe put the decision logic here. I always find the ! syntax of the sys.process.Process already hard to read and with additional logic behind, it gets even harder.

Suggested change

	val logger = publishLocalLogger(log)
	val ret = sys.process.Process(buildCommand, context) ! sys.env
	.get("DOCKER_BUILDKIT")
	.map(_ => publishLocalBuildkitLogger(log))
	.getOrElse(logger)
	val logger = sys.env.get("DOCKER_BUILDKIT")
	.exists(_ == "1")
	.map(_ => publishLocalBuildkitLogger(log))
	.getOrElse(publishLocalLogger(log))
	val ret = sys.process.Process(buildCommand, context) ! logger

[LeonardMeyer]

That would change the logger for the other cmd running docker images prune.... Not sure this is a good idea ? Or shall I create another variable ?

[muuki88]

I would keep it consistent. One build kit logger and one if no buildkit is being in use.

So yeah. I'm fine with changing the logger for the prune command if buildkit is enabled

[LeonardMeyer]

It will potentially output in INFO actual errors from the pruning though. But if you're fine with it, I made the change.

[muuki88]

Can you try running scalafmtFormatAll? It checked out your branch and it formatted the DockerPlugin.scala.

Or maybe you have a global scalafmt plugin installed?

[lightbend-cla-validator]

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[lightbend-cla-validator]

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[muuki88]

Thanks for fixing this 🤗 I'll release as soon as I got the release process up and running again 😞