remove caches older than 30 days

.github/workflows/remove_old_caches.yml

@@ -0,0 +1,47 @@
+name: Cache Cleanup
+
+on:
+  workflow_dispatch:  # Manually trigger the workflow
+  schedule:
+    - cron: '0 0 * * 0'  # Run every Sunday at midnight (UTC)
+
+jobs:
+  cleanup:
+    name: Cleanup Old Caches
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v4
+
+      - name: Install gh CLI
+        run: |
+          sudo apt-get update
+          sudo apt-get install gh
+
+      - name: Install gh-actions-cache extension
+        run: |
+          gh extension install actions/gh-actions-cache
+
+      - name: List all caches
+        run: |
+          gh actions-cache list
+
+      - name: Delete caches older than 30 days
+        env:
+          MAX_CACHE_AGE_DAYS: 30
+        run: |
+          echo "Fetching list of caches..."
+          # List caches
+          caches=$(gh actions-cache list --json id,createdAt)
+
+          echo "Caches found: $(echo "$caches" | jq '. | length')"
+
+          # Get current time
+          current_time=$(date +%s)
+
+          # Loop through all caches and delete those older than MAX_CACHE_AGE_DAYS
+          for cache_id in $(echo "$caches" | jq -r '.[] | select((('"$current_time"' - (.createdAt | fromdateiso8601 | mktime)) / 86400) > '"$MAX_CACHE_AGE_DAYS"') | .id'); do
+            echo "Deleting cache with ID: $cache_id"
+            gh actions-cache delete $cache_id --confirm
+            echo "Deleted cache $cache_id"
+          done