Add pyinstaller Windows CI build

.github/workflows/flatpak.yml

@@ -13,7 +13,8 @@ jobs:
       options: --privileged
     steps:
     - uses: actions/checkout@v4
-    - uses: flatpak/flatpak-github-actions/flatpak-builder@v6
+    - name: Build Flatpak
+      uses: flatpak/flatpak-github-actions/flatpak-builder@v6
       with:
         bundle: yafi-${{ github.sha }}.flatpak
         manifest-path: au.stevetech.yafi.json

.github/workflows/pyinstaller-linux.yml

@@ -7,16 +7,21 @@ on:
 
 jobs:
   pyinstaller-linux:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: awalsh128/cache-apt-pkgs-action@latest
+      # We shouldn't use actions/setup-python since PyGObject is compiled against the system Python
+      - name: Install System Dependencies
+        uses: awalsh128/cache-apt-pkgs-action@latest
         with:
           packages: python3-gi gir1.2-gtk-4.0 gir1.2-adw-1
           version: 0
-      - run: pip install pyinstaller
-      - run: pip install .
-      - run: pyinstaller yafi.spec
+      - name: Install PyInstaller
+        run: pip install pyinstaller
+      - name: Build YAFI via Pip
+        run: pip install .
+      - name: Build with PyInstaller
+        run: pyinstaller yafi.spec
         working-directory: pyinstaller
       - name: Upload PyInstaller Artifact
         uses: actions/upload-artifact@v4

.github/workflows/pyinstaller-windows.yml

@@ -0,0 +1,53 @@
+name: PyInstaller Build Windows
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  pyinstaller-windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+            python-version: '3.13' 
+            cache: 'pip'
+
+      - name: Cache GTK4
+        id: cache-gtk4
+        uses: actions/cache@v4
+        with:
+          path: C:\gtk
+          key: Gvsbuild_2025.8.0
+
+      - name: Download GTK4 Gvsbuild zip
+        if: steps.cache-gtk4.outputs.cache-hit != 'true'
+        run: Start-BitsTransfer -Source https://github.com/wingtk/gvsbuild/releases/download/2025.8.0/GTK4_Gvsbuild_2025.8.0_x64.zip -Destination Gvsbuild.zip
+
+      - name: Extract Gvsbuild zip
+        if: steps.cache-gtk4.outputs.cache-hit != 'true'
+        run: Expand-Archive -Path Gvsbuild.zip -DestinationPath C:\gtk -Force
+
+      - name: Install PyGObject wheel
+        run: pip install --force-reinstall (Resolve-Path C:\gtk\wheels\PyGObject*.whl) (Resolve-Path C:\gtk\wheels\pycairo*.whl)
+        
+      - name: Add GTK bin to PATH
+        run: echo "C:\gtk\bin" | Out-File -Append -Encoding ascii $env:GITHUB_PATH
+
+      - name: Install PyInstaller
+        run: pip install pyinstaller
+
+      - name: Build YAFI via Pip
+        run: pip install .
+
+      - name: Build with PyInstaller
+        run: python -m PyInstaller yafi.spec
+        working-directory: pyinstaller
+
+      - name: Upload PyInstaller Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          path: pyinstaller/dist/YAFI.exe
+          name: yafi-windows-${{ github.sha }}