bash_logger.sh

#!/bin/bash
SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

error() {
  local parent_lineno="$1"
  local message="$2"
  local code="${3:-1}"
  if [[ -n "$message" ]] ; then
    echo -e "\n\n`date -u --rfc-3339=seconds|sed -e's/\+00:00/Z/'` [ERROR] $0:${parent_lineno}:${message}; exiting with status ${code}\n\n"
  else
    echo -e "\n\n`date -u --rfc-3339=seconds|sed -e's/\+00:00/Z/'` [ERROR] in $BASH_SOURCE:${parent_lineno}:; exiting with status ${code}\n\n"
  fi
  exit "${code}"
}
trap 'error ${LINENO}' ERR

log_info() {
    local message="$1"
    echo "`date -u --rfc-3339=seconds|sed -e's/\+00:00/Z/'` [INFO] $0:${message}"
}

log_error() {
    local message="$1"
    echo "`date -u --rfc-3339=seconds|sed -e's/\+00:00/Z/'` [ERROR] $0:${message}"
}


# ... your code here ...

log_info "Cleaning Up"
${SCRIPT_DIR}/cleanup.sh
log_info "Done"