Simplify workflow using CMake preset. Use git pulled vcpkg.

.github/workflows/CMakeUserPresets.json

@@ -0,0 +1,37 @@
+{
+  "version": 6,
+  "configurePresets": [
+    {
+      "name": "clang",
+      "displayName": "Clang",
+      "inherits": "vcpkg",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Release",
+        "CMAKE_C_COMPILER": "/usr/bin/clang-18",
+        "CMAKE_CXX_COMPILER": "/usr/bin/clang++-18",
+        "CMAKE_CXX_FLAGS": "-stdlib=libc++",
+        "CMAKE_EXE_LINKER_FLAGS": "-stdlib=libc++ -lc++abi",
+        "VCPKG_OVERLAY_TRIPLETS": ".github/workflows/triplets",
+        "VCPKG_TARGET_TRIPLET": "x64-linux-clang"
+      },
+      "condition": {
+        "type": "equals",
+        "lhs": "${hostSystemName}",
+        "rhs": "Linux"
+      }
+    },
+    {
+      "name": "msvc",
+      "displayName": "MSVC",
+      "inherits": "vcpkg",
+      "cacheVariables": {
+        "CMAKE_BUILD_TYPE": "Release"
+      },
+      "condition": {
+        "type": "equals",
+        "lhs": "${hostSystemName}",
+        "rhs": "Windows"
+      }
+    }
+  ]
+}

.github/workflows/linux.yml

@@ -30,6 +30,12 @@ jobs:
         run: |
           sudo apt-get install ninja-build xorg-dev libc++-dev libc++abi-dev
 
+      - name: Install vcpkg
+        run: |
+          git clone https://github.com/microsoft/vcpkg.git
+          cd vcpkg && ./bootstrap-vcpkg.sh
+          echo "VCPKG_ROOT=${{ github.workspace }}/vcpkg" >> $GITHUB_ENV
+
       - name: Export GitHub Actions cache environment variables
         uses: actions/github-script@v7
         with:
@@ -39,15 +45,8 @@ jobs:
 
       - name: Configure
         run: |
-          cmake --preset=vcpkg \
-            -DCMAKE_C_COMPILER="/usr/bin/clang-18" \
-            -DCMAKE_CXX_COMPILER="/usr/bin/clang++-18" \
-            -DCMAKE_BUILD_TYPE=Release \
-            -DCMAKE_TOOLCHAIN_FILE="$VCPKG_INSTALLATION_ROOT/scripts/buildsystems/vcpkg.cmake" \
-            -DVCPKG_OVERLAY_TRIPLETS=".github/workflows/triplets" \
-            -DVCPKG_TARGET_TRIPLET="x64-linux-clang" \
-            -DCMAKE_CXX_FLAGS="-stdlib=libc++" \
-            -DCMAKE_EXE_LINKER_FLAGS="-stdlib=libc++ -lc++abi"
+          mv .github/workflows/CMakeUserPresets.json .
+          cmake --preset=clang
 
       - name: Build
         run: cmake --build build --config release

.github/workflows/windows.yml

@@ -31,6 +31,12 @@ jobs:
           vulkan-components: Vulkan-Headers, Vulkan-Loader
           vulkan-use-cache: true
 
+      - name: Install vcpkg
+        run: |
+          git clone https://github.com/microsoft/vcpkg.git
+          cd vcpkg && .\bootstrap-vcpkg.bat
+          echo "VCPKG_ROOT=${{ github.workspace }}/vcpkg" >> $GITHUB_ENV
+
       - name: Export GitHub Actions cache environment variables
         uses: actions/github-script@v7
         with:
@@ -40,9 +46,8 @@ jobs:
 
       - name: Configure
         run: |
-          cmake --preset=vcpkg `
-            -DCMAKE_BUILD_TYPE=Release `
-            -DCMAKE_TOOLCHAIN_FILE="$env:VCPKG_INSTALLATION_ROOT/scripts/buildsystems/vcpkg.cmake"
+          mv .github\workflows\CMakeUserPresets.json .\
+          cmake --preset=msvc
 
       - name: Build
         run: cmake --build build --config release

CMakePresets.json

@@ -11,8 +11,8 @@
       "name": "vcpkg",
       "displayName": "vcpkg-based dependency management",
       "inherits": "default",
+      "toolchainFile": "$env{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake",
       "cacheVariables": {
-        "CMAKE_TOOLCHAIN_FILE": "$env{VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake",
         "VCPKG_OVERLAY_PORTS": "${sourceDir}/overlays"
       }
     }