Hey there! I am trying to accelerate my python projects (we already using pants to package everything with Docker) I would like to see what is happening in the Docker build phase, even if I run

pants -ldebug package ...

I get the

[DEBUG] spawned local process as Some(2605) for Process { argv: ["/usr/bin/docker", "build" ...

message and then

⠓ 79.65s Building docker image

during the build Process, is there a way to expose the logs to see the steps and the layers of the build to see what is taking time and how I can optimize it ? Thanks in advance.

the stdout/stderr from a process invoked by Pants is buffered and not returned until the process exits, so you should see the build log, but it will be all at once at the end, and only when running with

-ldebug

.

Thanks, I will check in the logs after the building process is done, is there any way to force the

--cache-from

argument in the docker build command ?

Not easily, but there are work arounds to get it in there. See these threads: https://pantsbuild.slack.com/archives/C046T6T9U/p1684159227889179 https://pantsbuild.slack.com/archives/C046T6T9U/p1680209250680309

I think

docker_image

might support logging the output somehow. I’m on my phone so cannot check the docs, but hopefully you can find it!

@broad-processor-92400 I get the logs after the process is done, so no need to investigate further. Thanks 🙂