Allowing directory structure and module name mismatch

[yoohaemin]

Hi, we have a multi module sbt build in our git repository.

The root directory contains many unrelated files and folders, and we want to separate the directories that contains sources and the directories that contains other stuffs, so we have all of our module sources inside a root folder called modules (modules/foo, modules/bar/baz, ...).

With sbt, we could determine the root directory of a module in the buildfile, so a foo module's root directory can be wherever. In our case, it's modules/foo.

Right now I am struggling to have the build.mill in the root repository, and not have to have the module. prefix in every module (thus many of the cli invocations and in the IDE). Is this possible?

Conceptually, it would be nice to have a way to say: if the module's prefix is modules, then drop the prefix. Otherwise, keep the prefix. If they happen to collide, it's ok to blow up. It's our fault.

[lefou]

How about this:

// file: build.mill
package build

import mill._
import mill.scalalib._

object `package` extends RootModule {
  def millSourcePath = super.millSourcePath / "modules"

  object foo extends JavaModule
  object bar extends JavaModule
}

> mill show __.sources
[1/1] show
{
  "bar.sources": [
    "ref:v0:c984eca8:/tmp/mill-4/modules/bar/src"
  ],
  "foo.sources": [
    "ref:v0:c984eca8:/tmp/mill-4/modules/foo/src"
  ]
}

You can always override millSourcePath, if your module materializes in a different location.

[yoohaemin]

Thank you very much 🙏