setup.sh

#!/usr/bin/env bash
#{{{ Bash settings
set -o errexit   # abort on nonzero exit status
set -o nounset   # abort on unbound variable
set -o pipefail  # don't hide errors within pipes
set -o errtrace  # ERR trap is inherited by shell functions
# set -o xtrace    # show commands as they are executed
#}}}
declare -i install_xidel
install_xidel="${1:-}"

main() {

  trap exit_stage_left EXIT ERR # Elegant exit
  install_script "${install_xidel:-}"

}

exit_stage_left() {

  unset current_user_bin user_id user_name script_mode script_folder install_xidel temp_dir xidel_url path_xidel
  printf "\n%s\n" "Bye!"

}

install_script() {

  local current_user_bin
  local -i user_id
  local user_name
  local -i script_mode
  local script_folder
  local install_xidel
  local temp_dir
  local xidel_url
  local path_xidel

  current_user_bin="${HOME}/.local/bin"
  user_id="$(id --user)"
  user_name="$(id --user --name)"
  script_mode="740"
  script_folder="$(cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd)"
  install_xidel="${1:-}"; shift 1

  # No super user allowed
  if [[ "${user_id}" -ne 0 ]];then

    if [[ ! -d ${current_user_bin} ]];then

      printf "%s" "The ${current_user_bin} directory doesn't exists and will now be created."
      mkdir --verbose --parent "${current_user_bin}"
      printf "%s %s %s" "Close this terminal window and open a new one, so" "${current_user_bin}" "will be included in your current PATH variable."

    fi

    path_xidel="${current_user_bin}/"
    xidel_url="https://gitlab.com/msmafra/proton-get/-/raw/master/xidel"
    temp_dir="$(mktemp --directory --suffix=xidel > /dev/null 2>&1)"

    printf "%s %s \n" "-> Installing proton-get to" "${current_user_bin}"
    install --verbose -D -C --mode="${script_mode}" --owner="${user_name}" --group="${user_name}" "${script_folder}"/proton-get --target-directory="${current_user_bin}"

    if [[ ! -f "${HOME}"/.local/bin/xidel ]];then

      printf "\n%s\n%s\n%s\n" "This script uses xidel:" "https://github.com/benibela/xidel/" "https://www.videlibri.de/xidel.html"
      printf "%s %s\n" "Downloading xidel 0.9.9 (latest stable at 2022-01-31) to a temporary directory" "${temp_dir}"
      printf "%s %s\n" "wget --quiet --show-progress --progress=bar --content-disposition --continue" "${xidel_url}"

      cd "${temp_dir}" && pwd
      wget --quiet --show-progress --progress=bar --content-disposition --continue "${xidel_url}" --output-document="${temp_dir}"

      if [[ "${install_xidel:-0}" -eq 1 ]];then

        printf "\n%s\n" "-> Installing xidel to ${current_user_bin} ..."
        cd "${temp_dir}" && pwd
        install --verbose -D -C --mode="${script_mode}" --owner="${user_name}" --group="${user_name}" "${temp_dir}"/xidel --target-directory="${path_xidel}"

      fi

    fi

    "${current_user_bin}"/proton-get --version

  else

    printf "%s\n" "-> Usage of superuser/elevated privileges, is not allowed. Exiting <-"
    exit 1

  fi

}

main "${@}"