Run CI through prek on Arch

.github/workflows/matrix.yml

@@ -9,34 +9,31 @@ name: Matrix CI
 
 on: [push, pull_request]  # yamllint disable-line rule:truthy
 
+permissions:
+  contents: read
+
 jobs:
-  yamllint:
+  prek:
-    name: yamllint
+    name: Run prek hooks
-    runs-on: ubuntu-latest
-    steps:
-      - name: Check out
-        uses: actions/checkout@v6
-      - name: Run yamllint
-        uses: frenck/action-yamllint@v1.5.0
-  ansible-lint:
-    name: ansible-lint
     runs-on: ubuntu-latest
+    container:
+      image: docker.io/archlinux:base-devel
+
     steps:
+      # git must be installed before checkout so it does a proper clone
+      # (with .git directory) instead of a tarball download.
+      - name: Install git
+        run: pacman -Sy --noconfirm git
+
       - name: Check out
         uses: actions/checkout@v6
 
-      - name: Run ansible-lint
+      - name: Install dependencies
-        uses: ansible/ansible-lint@v26.3.0
+        run: pacman -S --noconfirm --needed just mise python
-        with:
+
-          args: "roles/custom"
+      - name: Run prek hooks
-          setup_python: "true"
+        run: |
-          working_directory: ""
+          # The checkout action sets safe.directory using its own bundled
-          requirements_file: requirements.yml
+          # git, which is separate from the pacman-installed git that prek uses.
-  precommit:
+          git config --global --add safe.directory "$GITHUB_WORKSPACE"
-    name: Run pre-commit
+          just prek-run-on-all
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v6
-      - name: Run pre-commit
-        uses: pre-commit/action@v3.0.1