Feature Request: Add Mill build tool for Scala

[nightscape]

Describe the Feature Request Mill is a modern alternative to SBT in the Scala world. It would be great to have it installed in the cimg/openjdk base image.

Is your feature request related to a particular problem? I would like to switch a project using CircleCI over from SBT to Mill. The current SBT version is using cimg/openjdk:18.0.1. In order to be able to run the new Mill build, I'd need to have the mill executable available, and adapting cimg/openjdk would be one way where other people could benefit as well.

How will this feature request benefit CircleCI jobs using this image? It would speed up jobs using Mill significantly by not having to install Mill on every run?

In order for us to add a tool within the image, it has to be something that is maintained and useful to a majority of CircleCI users. > Every tool added makes the image larger and slower for all users, so any new additions need to be carefully thought out. I agree and would totally understand if you saw the downsides as exceeding the upside 😉

Describe the solution you would like to see I would like to see Mill package installed by default in the image.

Describe alternatives you have considered Creating a special Scala & Mill Orb that uses my Mill base image.

[ryanbourdais]

I dont see a problem with adding this to the image @BytesGuy, do you have any input? If not, I can open a PR today to add it to the dockerfile.template so it starts being rolled out in the next releases

[BytesGuy]

@ryanbourdais Mill seems a popular enough project that it’s worth consideration. As long as it doesn’t substantially increase the image size then it should be fine

[ryanbourdais]

@nightscape mill will be included in the java 21 release here: #167