[SOLVED] Conan package manager and CMakePresets.json? Is it possible?

Issue

I've just started using Conan package manager. Do you know is it possible to somehow call cmake with presets from conanfile.py? The current implementation is the following:

...

def build(self):
    cmake = CMake(self)
    cmake.configure()
    cmake.build()

...

I've managed to call CMakePresets.json by the following code (but it seems hacky - I don't like it).

...

    def cmake_configure(self)
        if self.settings.os == "Linux":
            self.run("cmake --preset=linux .")
        elif self.settings.os == "Macos":
            self.run("cmake --preset=macos .")
        elif self.settings.os == "Windows":
            self.run("cmake --preset=windows .")
        else:
            raise ConanInvalidConfiguration("Unsupported OS")

    def build(self):
        self.cmake_configure()
        self.run("cmake --build .")

...

Thank you in advance

Solution

Conan maintains backward compatibility with older CMake versions. Even for Conan 2.0, the community has reached a consensus (https://github.com/conan-io/tribe/pull/4) that CMake 3.15 is the base to support, that means that Conan should work by default with CMake 3.15 (or newer). If Conan used cmake presets, which is cmake>=3.19, then that wouldn't be satisfied. At some point, Conan will add some tools to manage presets, but at the moment there is nothing built-in.

However, using presets, might not be necessary, as CMakeToolchain will generate a conan_toolchain.cmake file that can help with the integration (the CMake generator is still necessary to be passed in command line).

Answered By - drodri