See if we can switch to a system on CI

Author: ethnt

.github/workflows/ci.yml

@@ -41,6 +41,34 @@ jobs:
         run: |
           nix build .#darwinConfigurations.${{ matrix.host }}.system --keep-going --print-build-logs --show-trace --verbose
 
+  switch-system:
+    name: Switch to system
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        host:
+          - eMac
+        os:
+          - macos-14
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - uses: ./.github/actions/setup
+        with:
+          attic_token: ${{ secrets.ATTIC_TOKEN }}
+          cachix_auth_token: ${{ secrets.CACHIX_AUTH_TOKEN }}
+          pragmatapro_deploy_key: ${{ secrets.PRAGMATAPRO_DEPLOY_KEY }}
+          secrets_deploy_key: ${{ secrets.SECRETS_DEPLOY_KEY }}
+      - name: Build ${{ matrix.host }} host
+        run: |
+          # Create /run directory
+          echo -e "run\tprivate/var/run" | sudo tee -a /etc/synthetic.conf >/dev/null
+          /System/Library/Filesystems/apfs.fs/Contents/Resources/apfs.util -t &>/dev/null || true
+          # Prevent conflict between Cachix installed by workflow and the one installed in the config
+          nix-env --set-flag priority 1 cachix
+          nix build .#darwinConfigurations.${{ matrix.host }}.system --keep-going --print-build-logs --show-trace --verbose
+          sudo ./result/sw/bin/darwin-rebuild switch --flake .#${{ matrix.host }}
+
   check:
     name: Check flake
     runs-on: ubuntu-latest