Resolving meta-build without maven access in 0.11+?

[Quafadas]

Up to mill 0.10.0, I believe it was possible to setup "predef" scripts. If I'm honest, I was a little hazy on exactly which one was used, but as far as I can tell, the presence of (one of?) these two files

C:\Users\partens\.mill\ammonite\predef.sc
C:\Users\partens\.mill\ammonite\predefScript.sc

which (both!) have content

import coursierapi.MavenRepository

interp.repositories() = List(  
  MavenRepository.of("https://packages.corp.com/artifactory/maven/"),
  MavenRepository.of("https://packages.corp.com/artifactory/maven-jitpack-remote/")
)

etc, appeared to configure mill to forget about the public maven instance (which I can't use, sadly), and hit up the corporate repository for resolving it's worker modules. This worked in the 0.10 series.

I have been unable to find a replacement for this functionality in the mill 0.11 series. It was suggested to open an issue following a short discussion on matrix (@lefou).

I've followed the CustomZincWorker instructions in the docs as best I am able. From what I've managed to glean, that CustomWorkerModule will kick in, if we were able to jump the hurdle of mill has resolving it's own meta build...

[Quafadas]

A solution was proposed by @chikei on matrix. Adding this at the beginning of the millw script,
set "COURSIER_REPOSITORIES=https://packages.corp.com/artifactory/maven/"

Successfully resolved the initial bootstrap part of the build. I'm unclear whether it's "canonical", but it works and I'm running with it!

On that basis, I'm happy to close this issue? @lefou - would you like a docs PR to the repositories section of the docs?

[lihaoyi]

Hey! Yes that is the expected solution, at least that's what I tested to work as a replacement before we rolled out 0.11.0.

We must have overlooked putting it in the migration documentation. Please send a PR if you can :)

[lefou]

You should also be able to set the environment variable from the cli.

$ COURSIER_REPOSITORIES=https://packages.corp.com/artifactory/maven/ mill resolve _