Add cleanup action

.forgejo/workflows/cleanup.yml

@@ -0,0 +1,43 @@
+name: Clean up Forgejo Container Registry
+
+on:
+  schedule:
+    - cron: '0 0 * * 0' # Runs every Sunday at midnight
+  workflow_dispatch: # Allows manual triggering
+
+jobs:
+  delete-old-images:
+    runs-on: almalinux-10
+    steps:
+      - name: Delete old versions
+        run: |
+          REGISTRY="forge.pc-rytteren.dk"
+          OWNER="${{ github.repository_owner }}"
+          IMAGE="my-ostree-os"
+          MIN_KEEP=50
+          TOKEN="${{ secrets.PACKAGE_TOKEN }}"
+
+          # Fetch all container packages with this name, sorted oldest first (by id)
+          # API returns a list of package objects, each with "id" and "version"
+          RAW=$(curl -s -H "Authorization: token ${TOKEN}" \
+            "https://${REGISTRY}/api/v1/packages/${OWNER}?type=container&q=${IMAGE}&limit=200")
+
+          # Filter only packages with the correct name and extract id, sort oldest first
+          IDS=$(echo "$RAW" | tr '{' '\n' | grep "\"name\":\"${IMAGE}\"" | \
+            sed 's/.*"id":\([0-9]*\).*/\1/' | sort -n)
+
+          TOTAL=$(echo "$IDS" | grep -c '[0-9]' || true)
+          echo "Found ${TOTAL} packages total, keeping ${MIN_KEEP}"
+
+          if [ "$TOTAL" -le "$MIN_KEEP" ]; then
+            echo "No packages to delete"
+            exit 0
+          fi
+
+          # Delete the oldest (lowest ids) beyond MIN_KEEP
+          TO_DELETE=$(echo "$IDS" | head -n $(( TOTAL - MIN_KEEP )))
+          for ID in $TO_DELETE; do
+            echo "Deleting package id: ${ID}"
+            curl -s -X DELETE -H "Authorization: token ${TOKEN}" \
+              "https://${REGISTRY}/api/v1/packages/${OWNER}/${ID}"
+          done