cache cleanup pr

Author: taddes

.github/workflows/cleanup-branch-cache.yml

@@ -0,0 +1,35 @@
+name: Cleanup branch caches on merge
+
+on:
+  pull_request:
+    types: [closed]
+
+jobs:
+  cleanup-cache:
+    # Runs on both merged PRs and PRs closed without merging
+    runs-on: ubuntu-latest
+    permissions:
+      actions: write
+    steps:
+      - name: Delete caches for merged branch
+        run: |
+          set +e
+          CACHE_IDS=$(gh cache list \
+            --repo "${{ github.repository }}" \
+            --ref "refs/heads/${{ github.head_ref }}" \
+            --limit 100 \
+            --json id \
+            --jq '.[].id')
+
+          if [ -z "$CACHE_IDS" ]; then
+            echo "No caches found for branch ${{ github.head_ref }}"
+            exit 0
+          fi
+
+          echo "Deleting caches for merged branch: ${{ github.head_ref }}"
+          echo "$CACHE_IDS" | while IFS= read -r id; do
+            echo "  Deleting cache ID: $id"
+            gh cache delete "$id" --repo "${{ github.repository }}"
+          done
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}