#!/bin/bash
set -euo pipefail

SRC_DIR=/opt/server/data
BACKUP_DIR=/opt/server/backups/jenkins_home
KEEP=4

mkdir -p "$BACKUP_DIR"

STAMP=$(date +%Y%m%d)
tar czf "$BACKUP_DIR/jenkins_home_$STAMP.tar.gz" -C "$SRC_DIR" jenkins_home

ls -1t "$BACKUP_DIR"/jenkins_home_*.tar.gz | tail -n +$((KEEP + 1)) | xargs -r rm --