#!/bin/bash

# lock script to prevent parallel running
scriptname=$(basename "$0")
pidfile="/tmp/${scriptname}-lock.pid"
exec 200>"$pidfile"
flock -n 200 || exit 1
pid=$$
echo $pid 1>&200

# error handling
function error_handler() {
  echo "Error occurred in script at line: ${1}"
  echo "Line exited with status: ${2}"
}

trap 'error_handler ${LINENO} $?' ERR

set -o errexit
set -o errtrace
set -o nounset

# set backups variable
NOW=$(date +%F-%a) # year-month-date-day format
BACKUPDIR="/var/lib/jenkins/backups"
JENKINS_TAR="jenkins-$NOW.tar.bz2"
S3_BUCKET="s3://<BUCKET_NAME>/jenkins/" # where <BUCKET_NAME> is your S3 bucket name

# check for backup directory
if [[ ! -d "$BACKUPDIR" ]]
  then
    mkdir -p "$BACKUPDIR"
fi

if ls "$BACKUPDIR"/FULL-* &> /dev/null; then
# archive backup
cd "$BACKUPDIR"
tar -cjf "$JENKINS_TAR" FULL-*

# copy to S3 bucket
aws s3 cp "$BACKUPDIR"/"$JENKINS_TAR" "$S3_BUCKET"

# cleanup disk space
rm -rf "${BACKUPDIR:?}"/*
else
    clear
    echo "Backup from thinBackup on Jenkins not present. Please login to Jenkins and run manually..."
    exit 1
fi