This is awesome.<p>Vlad's blog post at <a href="https://vladaionescu.com/introducing-earthly-build-automation-for-the-container-era-55619c63c3e" rel="nofollow">https://vladaionescu.com/introducing-earthly-build-automatio...</a> is a shorter introduction.<p>Reminds me of SourceHut's CI infrastructure (that uses VMs, rather than containers, and IIRC doesn't natively multi-stage in the same way - but has a similar use profile)
The ability to create a docker image from multiple sub-images is pretty useful. I think you could also use Dockerfile multi stage builds for that, but it’s not as clean.