Use Nix for all pre-commit dependencies instead of Python

Author: svnlto

.github/workflows/pre-commit.yml

@@ -14,31 +14,23 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Setup Python
-        uses: actions/setup-python@v5
+      - name: Install Nix
+        uses: cachix/install-nix-action@v31
         with:
-          python-version: '3.10'
+          extra_nix_config: |
+            experimental-features = nix-command flakes
 
       - uses: actions/cache@v4
         with:
           path: ~/.cache/pre-commit
           key: pre-commit-${{ hashFiles('.pre-commit-config.yaml') }}
 
-      - name: Install Nix
-        uses: cachix/install-nix-action@v31
-        with:
-          extra_nix_config: |
-            experimental-features = nix-command flakes
-
-      - name: Install Dependencies for Pre-commit Hooks
+      - name: Install Dependencies with Nix
         run: |
-          # Install Nix tools
-          nix profile install nixpkgs#nixfmt-rfc-style nixpkgs#shellcheck
-
-          # Install pre-commit
-          pip install pre-commit
+          # Install all dependencies via Nix
+          nix profile install nixpkgs#pre-commit nixpkgs#nixfmt-rfc-style nixpkgs#shellcheck
 
       - name: Run pre-commit hooks
         run: |
-          # Run pre-commit 
-          pre-commit run --all-files --hook-stage commit
+          # Run pre-commit hooks
+          pre-commit run --all-files