Using "build-scripts" package via tool_requires() not working

[tbsuht]

Using "build-scripts" package via tool_requires() not working

[memsharded]

Hi @tbsuht

Thanks for your question.

My understand is that the builddirs information is not used, as it is placed in the generated toolchain file and we're using the one-click-workflow of the CMake extension without manually doing a conan install before.

Indeed, the problem is that cmake-conan launches from CMake, and the way that Conan has to pass paths from tool_requires is a toolchain, but as cmake-conan starts from CMake, it is not possible to pass the conan_toolchain.cmake, it is too late.

I'd say that the scope of cmake-conan is limited to what CMake can reasonably do in a single pass. Conan allows more advanced uses cases, like reusing build scripts from dependencies, but at some point the conan install + cmake flow would be more recommended as more complete and powerful, sometimes it is not possible to just do absolutely everything from a single command cmake invocation, as there are limitations.

It might be possible to do some gymnastics like parsing the json and extracting the builddirs, then defining those in the module path, I'll talk with @jcar87 regarding this possibility.

[ericriff]

I just came across the same limitation.

I'm trying to use this integration on a project that relies on protobuf / protoc. I can access the protobuf library, but not the protoc binary.

I'm interested on any suggestions.