feat(actions): add Nix build

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>

.github/workflows/build.yml

@@ -15,6 +15,9 @@ on:
       SPARKLE_ED25519_KEY:
         description: Private key for signing Sparkle updates
         required: false
+      CACHIX_AUTH_TOKEN:
+        description: Private token for authenticating against Cachix cache
+        required: false
 
 jobs:
   build:
@@ -526,3 +529,33 @@ jobs:
           bundle: "Prism Launcher.flatpak"
           manifest-path: flatpak/org.prismlauncher.PrismLauncher.yml 
           cache-key: flatpak-${{ github.sha }}-x86_64
+
+  nix:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        package:
+          - prismlauncher
+          - prismlauncher-qt5
+    steps:
+      - name: Clone repository
+        if: inputs.build_type == 'Debug'
+        uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+      - name: Install nix
+        if: inputs.build_type == 'Debug'
+        uses: cachix/install-nix-action@v18
+        with:
+          install_url: https://nixos.org/nix/install
+          extra_nix_config: |
+            auto-optimise-store = true
+            experimental-features = nix-command flakes
+      - uses: cachix/cachix-action@v12
+        if: inputs.build_type == 'Debug'
+        with:
+          name: prismlauncher
+          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+      - name: Build
+        if: inputs.build_type == 'Debug'
+        run: nix build .#${{ matrix.package }} --print-build-logs

.github/workflows/trigger_builds.yml

@@ -33,3 +33,4 @@ jobs:
       is_qt_cached: true
     secrets:
       SPARKLE_ED25519_KEY: ${{ secrets.SPARKLE_ED25519_KEY }}
+      CACHIX_AUTH_TOKEN: ${{ secrets.CACHIX_AUTH_TOKEN }}