ci: run

.github/workflows/quality.yaml

@@ -0,0 +1,53 @@
+name: quality
+
+on:
+  pull_request:
+    branches: [main]
+  push:
+    branches: [main]
+
+jobs:
+  changes:
+    runs-on: ubuntu-latest
+    outputs:
+      nix: ${{ steps.changes.outputs.nix }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dorny/paths-filter@v3
+        id: changes
+        with:
+          filters: |
+            nix:
+              - '**/*.nix'
+              - 'flake.lock'
+              - 'flake.nix'
+
+  nix-format:
+    name: Nix Format Check
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.nix == 'true' }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v31
+      - run: nix fmt -- --ci
+
+  deadnix:
+    name: Deadnix Check
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.nix == 'true' }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v31
+      - run: nix develop --command deadnix --fail .
+
+  statix:
+    name: Statix Check
+    runs-on: ubuntu-latest
+    needs: changes
+    if: ${{ needs.changes.outputs.nix == 'true' }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v31
+      - run: nix develop --command statix check .