this post was submitted on 07 Mar 2024
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Packages should come with the necessary scripts (on Gentoo and Alpine they do), but if they don't for some reason then writing them is pretty simple. I think the updated layout really only needs dependencies and a couple variables defined.
Void uses Runit which is even simpler, you have one directory per service and at least a script called "run" in there which gets executed by the supervisor. The is usually just one line, that's all it takes to make a service work. It also has the supervisor take care of handling logging, similar to what Systemd does. I think it's a very clean, modern take on classic init, except that dependency/ordering doesn't exist - it just retries until things fall into place. Works well though.
i wonder if you can do a waterfall init where you can have an entry point that defines what services to run next. then you services can continue to pass on the next to run, or if it encounters one with a service that isn't running, it looks at what services that one requires and traverses up to start the root unstarted service. Easy way to define dependencies without much hassle. The former case handles system services, the latter handles application services.