Sharing sources between meta build and a custom plugin is not working.

[DamianReeves]

I am trying to share sources between a custom plugin I am developing and the metabuild for the mill repo in which I am developing the plugin, but something is not working as expected:

When I add this to my: mill-build/build.mill

package build 
import mill._ 
import mill.scalalib._

object `package` extends MillBuildRootModule with ScalaModule {

  override def sources = Task.Sources {
    super.sources() ++ Seq(PathRef(T.workspace /  os.up / "my-mill-plugins"/"src"))
  }

}

If I run ./mill --meta-level 1 showNamed __.sources I get the following which is expected:

❯ ./mill --meta-level 1 showNamed __.sources
{
  "sources": [
    "ref:v0:8d3598a5:/Users/redacted/code/repos/github/internal/scala/my-mill-plugins/build.mill",
    "ref:v0:f9a4b8b9:/Users/redactedcode/repos/github/internal/scala/my-mill-plugins/mill-build/src",
    "ref:v0:c984eca8:/Users/redacted/code/repos/github/internal/scala/my-mill-plugins/src"
  ]
}

And if I run ./mill showNamed "my-mill-plugins.sources":
I get this as expected:

❯ ./mill showNamed "my-mill-plugins.allSourceFiles"
[1/1] showNamed
{
  "my-mill-plugins.allSourceFiles": [
    "ref:v0:05bdafe7:/Users/redacted/code/repos/github/internal/scala/my-mill-plugins/my-mill-plugins/src/com/acme/mill/plugins/artifactory/MavenUtils.scala",
    "ref:v0:c45089c5:/Users/redacted/code/repos/github/internal/scala/my-mill-plugins/my-mill-plugins/src/com/acme/mill/plugins/artifactory/BuildPipelineArtifactory.scala"
  ]
}

But if I run: ./mill --meta-level 1 showNamed __.allSourceFiles

I get the below which doesn't include the source files from within the folder I added.

❯ ./mill --meta-level 1 showNamed __.allSourceFiles
{
  "allSourceFiles": [
    "ref:v0:f0ff61d1:/Users/redacted/code/repos/github/internal/scala/my-mill-plugins/out/mill-build/generateScriptSources.dest/build_/build.mill"
  ]
}

[DamianReeves]

Oops my mistake, it turns out the os.up was not needed like I thought, this works:

package build 
import mill._ 
import mill.scalalib._

object `package` extends MillBuildRootModule with ScalaModule {

  override def sources = Task.Sources {
    super.sources() ++ Seq(PathRef(T.workspace / "my-mill-plugins"/"src"))
  }

}