Create DocPreviewsCleanup.yml

.github/workflows/DocPreviewsCleanup.yml

@@ -0,0 +1,29 @@
+name: Doc Previews Cleanup
+
+on:
+  schedule:
+    - cron: "30 5 * * 1"
+
+# Ensure that only one "Doc Previews Cleanup" workflow is force pushing at a time
+concurrency:
+  group: doc-preview-cleanup
+  cancel-in-progress: false
+
+jobs:
+  doc-preview-cleanup:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - name: Checkout gh-pages branch
+        uses: actions/checkout@v4
+        with:
+          ref: gh-pages
+      - name: Delete preview and history + push changes
+        run: |
+          git config user.name "Documenter.jl"
+          git config user.email "[email protected]"
+          git rm -rf previews/*
+          git commit -m "delete previews directory"
+          git branch gh-pages-new $(echo "delete history" | git commit-tree HEAD^{tree})
+          git push --force origin gh-pages-new:gh-pages