[feature] Componets: Expose components to consumers

[danimtb]

Coming from #5090

On #6653 components were introduced at the definition level but cannot be used by a generator.

Implementing this feature should allow fine-grained components access to consumers via self.deps_cpp_info object.

Components should be accessible for each recipe like:

self.deps_cpp_info["dep1"].components

We should consider adding helper methods to get all the components in the right link order as requested in #6716

[jgsogo]

Alternative notation could be self.deps_cpp_info["dep1::cmp1"]

[memsharded]

Already documented.

[iiknd]

Hi, I can see this one closed along with 6716.
The documentation says it's still experimental feature? Is the current components feature still subject to small/big changes?

[jgsogo]

Hi, @unzap. Although everything is subject to change in the next major release if it is really needed, one of the main efforts would be dedicated to keeping recipes compatible for Conan v1 and Conan v2. We are already using components exhaustively in conan-center-index, you can use it as a proxy to know which features are well tested and won't likely be modified, it would break all ConanCenter (which is something we really don't want to do).

[iiknd]

Thanks for the info, I will have a look in there.