Add CI pipeline for native FreeType builds + NuGet publishing

Build FreeType from source for all platforms (win-x64, win-x86,
win-arm64, linux-x64, linux-arm64, osx universal) using cmake.
Collect native binaries, pack NuGet with dotnet workloads, and
publish to NuGet on main branch push.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: sebgod

.github/workflows/ci.yml

@@ -1,42 +1,121 @@
-name: Build
+name: CI/CD
 
-on: [push,pull_request]
+on: [push, pull_request]
+
+env:
+  VERSION_PREFIX: 3.2.${{ github.run_number }}
+  BUILD_CONF: Release
+  FREETYPE_CMAKE_FLAGS: >-
+    -DCMAKE_BUILD_TYPE=Release
+    -DBUILD_SHARED_LIBS=ON
+    -DFT_DISABLE_HARFBUZZ=ON
+    -DFT_DISABLE_BROTLI=ON
+    -DFT_DISABLE_BZIP2=ON
 
 jobs:
-  Build:
-    runs-on: macos-latest
+  build-native:
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { os: windows-latest,   rid: win-x64,       cmake_extra: "-A x64" }
+          - { os: windows-latest,   rid: win-x86,       cmake_extra: "-A Win32" }
+          - { os: windows-latest,   rid: win-arm64,     cmake_extra: "-A ARM64" }
+          - { os: ubuntu-latest,    rid: linux-x64,     cmake_extra: "" }
+          - { os: ubuntu-24.04-arm, rid: linux-arm64,   cmake_extra: "" }
+          - { os: macos-latest,     rid: osx,           cmake_extra: "-DCMAKE_OSX_ARCHITECTURES='arm64;x86_64'" }
 
+    runs-on: ${{ matrix.os }}
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
 
-      - name: Install dotnet workloads
-        run: dotnet workload install android ios tvos
+      - name: Install libpng (Linux)
+        if: runner.os == 'Linux'
+        run: sudo apt-get update && sudo apt-get install -y libpng-dev zlib1g-dev
+
+      - name: Configure FreeType
+        run: cmake -S freetype -B freetype/build ${{ env.FREETYPE_CMAKE_FLAGS }} ${{ matrix.cmake_extra }}
 
-      - name: Build
-        run: dotnet pack FreeTypeSharp/FreeTypeSharp.csproj
+      - name: Build FreeType
+        run: cmake --build freetype/build --config Release
+
+      - name: Collect native binary (Windows)
+        if: runner.os == 'Windows'
+        shell: bash
+        run: |
+          mkdir -p native
+          cp freetype/build/Release/freetype.dll native/ 2>/dev/null || cp freetype/build/freetype.dll native/
+
+      - name: Collect native binary (Linux)
+        if: runner.os == 'Linux'
+        run: |
+          mkdir -p native
+          find freetype/build -name "libfreetype.so*" -type f | head -1 | xargs -I{} cp {} native/libfreetype.so
+
+      - name: Collect native binary (macOS)
+        if: runner.os == 'macOS'
+        run: |
+          mkdir -p native
+          find freetype/build -name "libfreetype*.dylib" -type f | head -1 | xargs -I{} cp {} native/libfreetype.dylib
 
       - uses: actions/upload-artifact@v4
         with:
-          name: ${{ github.event.repository.name }} Artifacts
-          path: |
-            FreeTypeSharp/bin/Release/*.nupkg
-
-  BuildUWP:
-    runs-on: windows-latest
+          name: native-${{ matrix.rid }}
+          path: native/
+          retention-days: 5
 
+  pack:
+    needs: build-native
+    runs-on: macos-latest
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: 10.0.x
 
-      - name: Add msbuild to PATH
-        uses: microsoft/setup-msbuild@v2
+      - name: Install dotnet workloads
+        run: dotnet workload install android ios tvos
 
-      - name: Build
-        run: msbuild FreeTypeSharp/FreeTypeSharp.UWP.csproj -t:Restore,Pack /property:Configuration=Release
+      - name: Download all native binaries
+        uses: actions/download-artifact@v4
+        with:
+          path: native-artifacts
+
+      - name: Place native binaries in runtimes
+        run: |
+          cp native-artifacts/native-win-x64/freetype.dll   runtimes/FreeType2/win-x64/freetype.dll
+          cp native-artifacts/native-win-x86/freetype.dll   runtimes/FreeType2/win-x86/freetype.dll
+          cp native-artifacts/native-win-arm64/freetype.dll  runtimes/FreeType2/win-arm64/freetype.dll
+          cp native-artifacts/native-linux-x64/libfreetype.so  runtimes/FreeType2/linux-x64/libfreetype.so
+          cp native-artifacts/native-linux-arm64/libfreetype.so runtimes/FreeType2/linux-arm64/libfreetype.so
+          cp native-artifacts/native-osx/libfreetype.dylib   runtimes/FreeType2/osx/libfreetype.dylib
+          # Also copy to win10 runtimes
+          cp native-artifacts/native-win-x64/freetype.dll   runtimes/FreeType2/win10-x64/freetype.dll
+          cp native-artifacts/native-win-x86/freetype.dll   runtimes/FreeType2/win10-x86/freetype.dll
+          cp native-artifacts/native-win-arm64/freetype.dll  runtimes/FreeType2/win10-arm64/freetype.dll
+
+      - name: Pack NuGet
+        run: dotnet pack FreeTypeSharp/FreeTypeSharp.csproj -c $BUILD_CONF -p:PackageVersion=$VERSION_PREFIX
 
       - uses: actions/upload-artifact@v4
         with:
-          name: ${{ github.event.repository.name }} UWP Artifacts
-          path: |
-            FreeTypeSharp/bin/Release/*.nupkg
+          name: nuget-packages
+          path: FreeTypeSharp/bin/Release/*.nupkg
+          retention-days: 5
+
+  publish-nuget:
+    needs: pack
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+    steps:
+      - name: Download NuGet packages
+        uses: actions/download-artifact@v4
+        with:
+          name: nuget-packages
+      - name: Push NuGet package
+        run: dotnet nuget push **/*.nupkg -s nuget.org -k ${{ secrets.NUGET_API_KEY }}