Looking at the build dictionary, we see

jvm_binary

targets have a

manifest_entries

argument. Is there something equivalent for dynamic values, such as the current SHA? I seem to remember being able to but some "version info" in the jar manifest, but I can't seem to find an example.

JarBuilder

does have support for adding stuff to manifests, but the values need to be passed in, and I'm not seeing where that happens.