Add CD action to update Homebrew formula

[vladimyr]

Uses https://github.com/mislav/bump-homebrew-formula-action for updating Homebrew core formula.

[extrawurst]

Wow this is magic, I am wondering, is building it from source then? how does it know how to build it? I am such a brew-noob :(

[vladimyr]

Yeah it really looks magical but it is really just a large pile of tools/abstractions 😁

I am wondering, is building it from source then?

That is exactly how it works. brew fetches source tarball and executes cargo install:
https://github.com/Homebrew/homebrew-core/blob/616af97/Formula/gitui.rb#L16-L18 All that happens on Homebrew CI servers and resulting binary gets saved or as they say, bottled so end users just download and unpack build matching their platform.
If you ever used (BSD) ports it is pretty much the same pattern except compiling is almost always done on a remote machine and users get precompiled binaries.

how does it know how to build it?

Well, it just executes build step from the install method. The formula is pretty much nothing more than a runnable Ruby class. And this cargo install line is Homebrew's convention available as a template: https://github.com/Homebrew/brew/blob/6b36830/Library/Homebrew/formula_creator.rb#L177-L179 You can specify it by using brew create --rust ....

I am such a brew-noob :(

You should see me doing my first formula. Clueless is a mild word for describing that disaster 😁
I still do not consider myself a Homebrew expert but I learned a trick or two and if you have any additional questions feel free to ask and I hopefully help you find the answers.

[extrawurst]

Ok thanks for the clarifications. Any idea how to test this? Last time I played around with CD changes it was a mess cause I had to tag multiple releases just because stuff went wrong. People got annoyed because of the spamming this produced 🙈

[vladimyr]

I'm afraid I can only point you to create another one 🙈

[vladimyr]

FWIW, this should be as good as Github CLI's CD workflow: https://github.com/cli/cli/blob/7b225bf1c9ce8cb1ba5c1e7c422a91da743acbc4/.github/workflows/releases.yml#L30-L36

[extrawurst]

@vladimyr ok I am getting closer to a new release, so I will pretty soon merge this. one thing I would like to do is keep the 'old' private tap formulae update code around at first. could you adjust this?

[vladimyr]

Sure, I'll add that. 👍

[vladimyr]

@extrawurst I guess that's it but please double-check token scopes: docs

[extrawurst]

@vladimyr thanks for looking into this, but I meant the old CI step, not updating the private formula with the new action. I would like to keep the system that worked before inlace and just add the new action that hopefully works for the core-tap

[vladimyr]

Is this what you want? 🙃

[extrawurst]

@vladimyr really cool! thank you! ❤️