Projects that aren't meant to generate a wheel and `pyproject.toml`

[FRidh (Frederik Rietdijk)]

@BrenBarn

Based on what I said above, I still don’t really see the difference in terms of what needs to be given to a resolver. I do see that there may be a difference in when that is given to a resolver (i.e., at the build/distribution stage vs. at the end-user install stage), but in both cases, to me, the dependency information itself is the same at a conceptual level.

A project may contain a library and an application. They may not have the same dependencies. E.g., the application may only be a subset of the library dependencies (or the other way around if you use packages such as click for your cli).

Maybe we’re going a bit too deep here but it does matter. E.g., in Nixpkgs we often split packages, moving the executables elsewhere, because depending on your use case you may not need them and thus also not certain dependencies.