Fix Windows CI: use msvc-dev-cmd + Ninja instead of hardcoded VS2022

windows-latest now resolves to the windows-2025-vs2026 image, which no
longer ships Visual Studio 2022: the 'Visual Studio 17 2022' CMake
generator and the hardcoded vcvars64.bat path both fail. Use
ilammy/msvc-dev-cmd (vswhere-based, version agnostic) to set up cl.exe
and the Ninja generator for the CMake jobs.

.github/workflows/c-cpp.yml

@@ -22,27 +22,24 @@ jobs:
             cd tests
             x86_64-w64-mingw32-gcc -I../ -std=c11 -DTINYGLTF3_ENABLE_FS -o tester_v3_c.exe tester_v3_c.c ../tiny_gltf_v3.c
 
-  # Windows(x64) + Visual Studio 2022 build
+  # Windows(x64) + MSVC build (VS version agnostic: msvc-dev-cmd locates
+  # whatever Visual Studio the runner image ships, e.g. VS2022 or VS2026)
   build-windows-msvc:
 
     runs-on: windows-latest
     name: Build v3 C tests on Windows(x64, MSVC)
 
-    # Use system installed cmake
-    # https://help.github.com/en/actions/reference/software-installed-on-github-hosted-runners
     steps:
       - name: Checkout
         uses: actions/checkout@v5
+      - name: Set up MSVC environment
+        uses: ilammy/msvc-dev-cmd@v1
       - name: Configure
-        run: |
-          mkdir build
-          cd build
-          cmake -G "Visual Studio 17 2022" -A x64 -DTINYGLTF3_BUILD_TESTS=ON ..
-          cd ..
+        run: cmake -B build -G Ninja -DTINYGLTF3_BUILD_TESTS=ON
       - name: Build
-        run: cmake --build build --config Release
+        run: cmake --build build
       - name: Run tests
-        run: ctest --test-dir build -C Release --output-on-failure
+        run: ctest --test-dir build --output-on-failure
 
 
   build-linux:

.github/workflows/ci.yml

@@ -104,7 +104,8 @@ jobs:
       - name: Run tests
         run: ctest --test-dir build --output-on-failure
 
-  # Windows x64 - MSVC
+  # Windows x64 - MSVC (VS version agnostic; msvc-dev-cmd locates the
+  # Visual Studio shipped with the runner image, e.g. VS2022 or VS2026)
   windows-msvc-x64:
     runs-on: windows-latest
     name: Windows x64 (MSVC)
@@ -112,21 +113,21 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v5
 
+      - name: Set up MSVC environment
+        uses: ilammy/msvc-dev-cmd@v1
+
       - name: Configure
-        run: |
-          mkdir build
-          cd build
-          cmake -G "Visual Studio 17 2022" -A x64 -DTINYGLTF3_BUILD_TESTS=ON ..
+        run: cmake -B build -G Ninja -DTINYGLTF3_BUILD_TESTS=ON
 
       - name: Build
-        run: cmake --build build --config Release
+        run: cmake --build build
 
       - name: Run tester_v3_c on a sample model
         run: |
-          .\build\Release\tester_v3_c.exe models\Cube\Cube.gltf
+          .\build\tester_v3_c.exe models\Cube\Cube.gltf
 
       - name: Run tests
-        run: ctest --test-dir build -C Release --output-on-failure
+        run: ctest --test-dir build --output-on-failure
 
   # Windows MinGW - MSYS2
   windows-mingw-msys2:
@@ -332,10 +333,12 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v5
 
+      - name: Set up MSVC environment
+        uses: ilammy/msvc-dev-cmd@v1
+
       - name: Build and run tester_v3_c
         shell: cmd
         run: |
-          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat"
           cd tests
           cl /nologo /W4 /WX /std:c11 /Zi /Od /D_CRT_SECURE_NO_WARNINGS /DTINYGLTF3_ENABLE_FS /I.. tester_v3_c.c ..\tiny_gltf_v3.c /Fe:tester_v3_c.exe
           tester_v3_c.exe
@@ -343,7 +346,6 @@ jobs:
       - name: Build and run tester_v3_c_v1port
         shell: cmd
         run: |
-          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat"
           cd tests
           cl /nologo /W4 /WX /std:c11 /Zi /Od /D_CRT_SECURE_NO_WARNINGS /DTINYGLTF3_ENABLE_FS /I.. tester_v3_c_v1port.c ..\tiny_gltf_v3.c /Fe:tester_v3_c_v1port.exe
           tester_v3_c_v1port.exe