mochi/nixos/hosts/varda/resources/prune-backups.sh

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#!/usr/bin/env bash
# Set the backup directory
BACKUP_DIR="/var/lib/forgejo/dump"
# Keep the 3 most recent backups
KEEP_NUM=3
echo "Starting backup cleanup process..."
echo "Keeping the $KEEP_NUM most recent backups in $BACKUP_DIR"
# Find all backup files, sort by modification time (newest first),
# skip the first 3, and delete the rest
find "$BACKUP_DIR" -type f -name "forgejo-dump-*" -print0 |
sort -z -t_ -k2 -r |
tail -z -n +$((KEEP_NUM + 1)) |
while IFS= read -r -d '' file; do
echo "Deleting: $file"
rm -f "$file"
done
echo "Cleanup complete. Deleted all but the $KEEP_NUM most recent backups."