To release a version of jbake to homebrew one has to file a pullrequest to the homebrew repository like Homebrew/homebrew-core#36510
There is a checksum gradle plugin we could use to generate the hash (we need it for the homepage as well) and automate the creation of the Formula class file.
As a bonus we could checkout the forked version of homebrew, add that generated file. push to the forked repo and optionally open a pull request.