How to create formula for macOS & linux?

[sgoudham]

Hi, I'm new to writing formulas in Homebrew.
I was wondering how you can support brew install for macOS & linux(brew)?

I've tried various configurations, including setting multiple URLs for different platforms using on_macos and on_linux, but I can't figure it out. I've tried researching this question and coming up with nothing which leads me to believe that I fundamentally misunderstand something.

I'd appreciate any tips on how to make it possible. Here is my current formula for one of my tools. It currently only includes macOS as I couldn't figure out how to include a linux .tar.gz

I should mention that when I tried to use the above syntax to use 2 different urls, I kept getting macOS cannot include 'url' and assumed it to be intended behaviour, is this correct?

Thanks!

[SMillerDev]

You seem to use formula as casks. If you want to distribute precompiled binaries you should use a cask.

[sgoudham]

I thought casks were meant for homebrew GUI applications?

[SMillerDev]

Those are usually precompiled binaries.

[sgoudham]

Right okay. So formula should usually be built from source? Are there any examples of formula being built from source that work on macOS & linux?

[SMillerDev]

Almost all formulae in homebrew-core work for both platforms.