Adapt github action to just auto format everything

The previous version just checked if the files were formatted, but this
is unnecessary, since I can just make it format everything no matter
what so I do not need to deal with formatting manually.

Author: inverted-tree

.github/workflows/nix-ci.yml

@@ -31,11 +31,21 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - name: Set up Nix
         uses: cachix/install-nix-action@v22
         with:
           nix_path: nixpkgs=channel:nixos-unstable
 
-      - name: Install nixfmt
-        run: nix-shell -p nixfmt-rfc-style --command "find . -name '*.nix' -print0 | xargs -0 nixfmt --check"
+      - name: Install nixfmt and format .nix files
+        run: nix-shell -p nixfmt-rfc-style --command "find . -name '*.nix' -print0 | xargs -0 nixfmt"
+
+      - name: Commit and push formatted files
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add .
+          git diff --cached --quiet || git commit -m "Auto-format Nix files"
+          git push

users/lukas.nix

@@ -21,6 +21,7 @@
       tree
       unzip
       usbutils
+      vimv
       wget
       yazi
       zoxide