Lost ability to install Mill for GHA when build.sc is not at the project root

[davesmith00000]

Hi,

I have a project that builds with a mix of Mill and sbt (for historical reasons), this means that neither sbt nor Mill live at the repo's root level. This worked fine we tried to upgrade to Mill 0.11.1, but now doesn't due to a recent change:

mill/runner/src/mill/runner/MillBuildBootstrap.scala

Line 71 in 1e5871a

val msg = "build.sc file not found. Are you in a Mill project folder?"

(To answer to the question: "No, I'm not, but I will be." 😄)

The setup-mill action can no longer install Mill for us, producing this error:

I realise that...

1. It will be suggested we use the bootstrap script thingy.
2. I can probably fix this by placing a dummy build.sc at the root.
3. This is an edge case, most people don't do this.

But I thought I'd raise the issue in case it was indicative of a wider problem. Feel free to close the issue based on any or all of the above reasons.

[lefou]

I think you discovered a bug. Mill should work without an existing build.sc, otherwise commands like init will no longer work. Thanks for reporting.

[lefou]

This should work again with the merge of #2662, which fixes the defunct version command. But I think using mill version could be replaced by mill --version which should return much faster.