function tools_dir {
    local tools_dir=$(dirname "${BASH_SOURCE[0]}")
    PATH=${CI_TOOLS_ORIGINAL_PATH:-${PATH}} "${tools_dir}/realpath" "${tools_dir}"
}

export CI_TOOLS_DIR=${CI_TOOLS_DIR:-$(tools_dir)}
export CI_TOOLS_ORIGINAL_PATH=${CI_TOOLS_ORIGINAL_PATH:-${PATH}}
export PATH=${CI_TOOLS_DIR}:${PATH}