Bash library utils

bash_lib_utils.sh

yaml2json ()
{
  python -c 'import yaml, json, sys ; print(json.dumps(yaml.safe_load(sys.stdin.read())))'
}

json2yaml ()
{
  python -c 'import yaml, json, sys; print(yaml.dump(yaml.safe_load(sys.stdin.read()), indent=2))' input.yaml
}

grep_ip ()
{
  grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
}

load_colors ()
{

  bold=$(tput bold)
  underline=$(tput sgr 0 1)
  reset=$(tput sgr0)

  purple=$(tput setaf 171)
  red=$(tput setaf 1)
  green=$(tput setaf 76)
  tan=$(tput setaf 3)
  blue=$(tput setaf 38)
}


user_ask () {
  printf "\n${bold}$@${reset}"
  read -p " (y/n) " -n 1
  printf "\n"
}

# Test whether the result of an 'ask' is a confirmation
is_confirmed() {
if [[ "$REPLY" =~ ^[Yy]$ ]]; then
  return 0
fi
return 1
}


# See: https://github.com/martinburger/bash-common-helpers/blob/master/bash-common-helpers.sh

assert_root_user ()
{
  if [[ ${EUID} -ne 0 ]]; then
    return 1
  fi
}

assert_command ()
{
  local cmd=${1}
  type ${cmd} >/dev/null 2>&1 || return 1
}


function cmn_ask_to_continue {
  local msg=${1}
  local waitingforanswer=true
  while ${waitingforanswer}; do
    read -p "${msg} (hit 'y/Y' to continue, 'n/N' to cancel) " -n 1 ynanswer
    case ${ynanswer} in
      [Yy] ) waitingforanswer=false; break;;
      [Nn] ) echo ""; cmn_die "Operation cancelled as requested!";;
      *    ) echo ""; echo "Please answer either yes (y/Y) or no (n/N).";;
    esac
  done
  echo ""
}