I forked the EOSIO source code from GitHub, My arch is MacOs Mojave then I want to build it on my local machine meanwhile output the bottle file locally, would anyone else give me some formula sample about how to do above?
Formula directory full of code samples to help you build a formula. As for building a bottle locally. As for the bottle, there’s the https://docs.brew.sh/Manpage#install-options-formula
--build-bottle argument that you can pass to the local install. https://docs.brew.sh/Manpage#bottle-options-formula will then generate the actual binary for you.