Run actionlint on workflow file

Author: smelc

.github/workflows/actionlint.yml

@@ -0,0 +1,27 @@
+name: actionlint
+
+on:
+  push:
+  merge_group:
+  pull_request:
+
+jobs:
+  actionlint:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+      # Taken from https://github.com/rhysd/actionlint/blob/v1.7.7/docs/usage.md#use-actionlint-on-github-actions
+      - name: Download actionlint
+        id: get_actionlint
+        run: bash <(curl https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)
+        shell: bash
+      - name: Check workflow files
+        run: |
+          for file in $(git ls-files .github/workflows/*)
+          do
+            echo "Checking $file"
+            ${{ steps.get_actionlint.outputs.executable }} -color $file || exit 1
+          done
+        shell: bash