What's the proper way to change the name of out.jar resulting from assembly?

[andrea-corradetti]

The result of foo.assembly is the file out/foo/assembly.dest/out.jar.
Can I set a custom name (and possibly version) for the jar file without redefining the assembly task?
I looked into the publishLocal task, but I don't want to fill in all the pom information at this point.
The ArtifactId property doesn´t seem to affect foo.assembly.

[lihaoyi]

Typically you would do something like

override def assembly = Task{
  os.copy(super.assembly().path, Task.dest / "my-custom-name.jar")
  PathRef(Task.dest / "my-custom-name.jar")
}

[lolgab]

We could introduce something like def assemblyName: T[String] = Task { "out" } and make it configurable.

[lihaoyi]

We could, but do we need to? Copying the file isn't a big hardship, and Mill's output structure generally isn't very configurable on the assumption that you can copy or rename the files however you like after they're built

[andrea-corradetti]

Thank you!
If I'm not mistaken, both Gradle and sbt make the jar name configurable, and I was expecting something equivalent in Mill.
I understand the rationale for keeping the output structure rigid by default, and I have no strong opinion either way.
Maybe a pointer in the docs explaining the idiomatic approach could be helpful (unless it's there and I missed it).