Add Windows to CI matrix.

.github/workflows/rust.yml

@@ -43,7 +43,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: ['macos-latest', 'ubuntu-22.04']
+        os: ['macos-latest', 'ubuntu-22.04', 'windows-latest']
         rust: ['stable', '1.57']
 
     runs-on: ${{ matrix.os }}
@@ -63,6 +63,21 @@ jobs:
         run: brew install gtk4 pkg-config
         if: matrix.os == 'macos-latest'
 
+      - name: Install dependencies (Windows)
+        uses: lukka/run-vcpkg@v11
+        with:
+          vcpkgGitCommitId: c8696863d371ab7f46e213d8f5ca923c4aef2a00
+          runVcpkgInstall: true
+          doNotCache: false
+        if: matrix.os == 'windows-latest'
+
+      - name: Set environment (Windows)
+        run: |
+          echo "PKG_CONFIG=${env:VCPKG_INSTALLED_DIR}\\tools\\pkgconf\\pkgconf.exe" | Out-File -FilePath $env:GITHUB_ENV -Append
+          echo "PKG_CONFIG_PATH={$env:VCPKG_INSTALLED_DIR}\\lib\\pkgconfig" | Out-File -FilePath $env:GITHUB_ENV -Append
+          echo "PATH={$env:PATH};{$env:VCPKG_INSTALLED_DIR}\\bin" | Out-File -FilePath $env:GITHUB_ENV -Append
+        if: matrix.os == 'windows-latest'
+
       - uses: Swatinem/rust-cache@v2
 
       - name: Build

vcpkg.json

@@ -0,0 +1,3 @@
+{
+  "dependencies": ["gtk", "pkgconf"]
+}