homebrew-core requires binaries to be compiled from source, you can’t just download an asset from GitHub Releases and then use the
bin.install command to setup the binary.
If you’d prefer to use the pre-compiled you can’t introduce your tool into
homebrew-core, ie. it won’t be installable with
brew install toolname. Instead you can create a tap (such as croc which allows
brew install schollz/tap/croc and maps to
schollz/homebrew-tap/Formula/croc.rb on GitHub) or you can create a Formula file for direct reference (such as the pup.rb file in the
ericchiang/pup GitHub repo). GoReleaser has support for maintaining Homebrew taps.
If you do want to include it in
homebrew-core you can follow the example of homebrew-core/Formula/pup.rb which uses homebrew dependencies on
gox to build. Your go project must be vendored though, ie. you can’t use
go get in the build step, for the
homebrew-core maintainers to accept it.