jackkoenig/mill-multi-project

mill-multi-project

This is an example project for illustrating a complex multi-module build with mill.

Problem Statement

In this example, we have 4 projects: top, bar, fizz, and foo.

1. foo has no dependencies and can be compiled and run on its own
2. fizz is a "sub-module" of bar that has a dependency on foo
3. bar has a module dependency on fizz
4. top has a module dependency on bar

The purpose of this example is to illustrate that the dependency of fizz on foo can be either an ivy dependency or a module dependency. By default in the bar directory, it uses an ivy dependency. top creates a parallel bar2 module that instead uses a module dependency on foo.

To run top, you do not need to publish foo, you can just run:

> mill top.run

To build bar in isolation, you need to first publish foo and then you can run bar:

> cd foo
> mill foo.publishLocal
> cd ../bar
> mill bar.run