a few steps towards a working windows pipeline

Windows pipeline is now doing what the samples from run-vcpkg and run-cmake
suggest it should do and vcpkg claims that it should handle cmake find_package
calls correctly if you use their vcpkg.cmake as the toolchain.
It's not working, because for some reason the find_package call for Qt still
fails with cmake claiming it can't find a Qt5config.cmake file.

Author: Michel Schmid

.github/workflows/build.yaml

@@ -47,11 +47,17 @@ jobs:
         with:
           vcpkgGitCommitId: 8eb57355a4ffb410a2e94c07b4dca2dffbee8e50
           vcpkgDirectory: c:/vcpkg  # folder must reside in c:\ otherwise qt wont install due to long path errors
-          # needed to actually install the vcpkg dependencies
-          runVcpkgInstall: true
 
       - name: Run CMake and run vcpkg to build packages
         uses: lukka/run-cmake@v10
         with:
-          configurePreset: "windows-default"
+          # this preset is needed to actually install the vcpkg dependencies
+          configurePreset: "ninja-multi-vcpkg"
+          configPresetAdditionalArgs: "[-DVCPKG_TARGET_TRIPLET=x64-windows]"
+          buildPreset: "ninja-multi-vcpkg"
           buildPresetAdditionalArgs: "['--config Release']"
+    env:
+      # [OPTIONAL] Define the vcpkg's triplet you want to enforce, otherwise the default one
+      # for the hosting system will be automatically choosen (x64 is the default on all
+      # platforms, e.g. `x64-osx`).
+      VCPKG_DEFAULT_TRIPLET: "x64-windows"

CMakePresets.json

@@ -14,6 +14,32 @@
         "CMAKE_BUILD_TYPE": "Release",
         "CMAKE_INSTALL_PREFIX": "${sourceDir}/out/install/${presetName}"
       }
+    },
+    {
+      "name": "ninja-multi-vcpkg",
+      "displayName": "Windows x64 Release vcpkg",
+      "generator": "Ninja Multi-Config",
+      "binaryDir": "${sourceDir}/out/build/${presetName}",
+      "architecture": {
+        "value": "x64",
+        "strategy": "external"
+      },
+      "cacheVariables": {
+        "CMAKE_TOOLCHAIN_FILE": {
+          "type": "FILEPATH",
+          "value": "$env{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake"
+        },
+        "CMAKE_BUILD_TYPE": "Release",
+        "CMAKE_INSTALL_PREFIX": "${sourceDir}/out/install/${presetName}"
+      }
+    }
+  ],
+  "buildPresets": [
+    {
+      "name": "ninja-multi-vcpkg",
+      "configurePreset": "ninja-multi-vcpkg",
+      "displayName": "Build ninja-multi-vcpkg",
+      "description": "Build ninja-multi-vcpkg Configurations"
     }
   ]
-}
+}