temp: prune gitea dumps

.gitea/workflows/disk-prune.yml

@@ -0,0 +1,23 @@
+name: disk-prune
+on:
+  workflow_dispatch:
+jobs:
+  prune:
+    runs-on: nixos
+    steps:
+      - name: prune gitea dumps, keep newest 2
+        run: |
+          set +e
+          /run/current-system/sw/bin/docker run --rm -v /mnt/appdata:/a ubuntu:24.04 bash -c '
+            cd /a/gitea/dump || exit 1
+            echo "== before: file count"; ls -1 | wc -l
+            echo "== oldest"; ls -t | tail -1
+            echo "== newest"; ls -t | head -1
+            echo "== total"; du -sh /a/gitea/dump
+            echo "== newest 3 sizes"; for f in $(ls -t | head -3); do du -sh "$f"; done
+            echo "== deleting all but newest 2"
+            ls -t | tail -n +3 | tr "\n" "\0" | xargs -0 -r rm -rf --
+            echo "== after: file count"; ls -1 | wc -l
+            echo "== after total"; du -sh /a/gitea/dump
+            echo "== df"; df -h /a
+          '