fix windows pipeline

[owlkward]

Commit 2312fb2 tried to fix the windows pipeline, but cmake still does not find Qt for some reason.
Qt5 is installed via vcpkg and in the pipeline specifically with https://github.com/lukka/run-vcpkg/tree/v11.0, but the documentation from run-vcpkg says the dependencies are only built if the option runVcpkgInstall is set to true, but suggests it to not use that (and using it does not solve the problem, I have tried that).
Instead it suggests to let https://github.com/lukka/run-cmake/tree/v10 handle it, by using a preset set in CMakePreset.json that sets the CMAKE_TOOLCHAIN_FILE to the vcpkg.cmake contained in the vcpkg installation.
The vcpkg documentation claims that if vcpkg.cmake is used as the toolchain file the find_package calls should just work.
This is what is currently implemented, but it still fails.
Specifically the mentioned commit is heavily inspired by the samples linked in the run-cmake README, i.e. this workflow file https://github.com/lukka/CppBuildTasks-Validation/blob/v10/.github/workflows/hosted-ninja-vcpkg.yml and this CMakePreset.json for its ninja-multi-vcpkg preset: https://github.com/lukka/CppBuildTasks-Validation/blob/v10/cmakepresets/CMakePresets.json
This answer on a vcpkg issue microsoft/vcpkg#11247 (comment) says that it should work if the vcpkg triplet is explicitly set, but that also did not solve the problem, unless I did not set them correctly.

[owlkward]

I also tried setting:
set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH};${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/share/cmake/Qt5") set(Qt5_DIR "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/share/cmake/Qt5") set(CMAKE_PREFIX_PATH "${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/share/cmake/Qt5") find_package(Qt5 COMPONENTS Core Widgets OpenGL Network REQUIRED)
but I still get the 'cannot find Qt5' error and that it wants a Qt5Config.cmake, but if make cmake print out the contents of Qt5_DIR with:
file(GLOB qt_dir "${Qt5_DIR}/*") message(FATAL_ERROR ${qt_dir})
(the FATAL_ERROR is just there so that it crashes at the message and I don't have to find the message within a million cmake prints)
I get this output:
"D:/a/grSim/grSim/out/build/ninja-multi-vcpkg/vcpkg_installed/x64-windows/share/cmake/Qt5/Qt5Config.cmakeD:/a/grSim/grSim/out/build/ninja-multi-vcpkg/vcpkg_installed/x64-windows/share/cmake/Qt5/Qt5ConfigVersion.cmakeD:/a/grSim/grSim/out/build/ninja-multi-vcpkg/vcpkg_installed/x64-windows/share/cmake/Qt5/Qt5ModuleLocation.cmake" which clearly contains "D:/a/grSim/grSim/out/build/ninja-multi-vcpkg/vcpkg_installed/x64-windows/share/cmake/Qt5/Qt5Config.cmake"

So whoever picks up this issue in the future: good luck, you're going to need it.