shortener

gistfile1.txt

#!/usr/bin/env bash

shorten() {
  if [[ -z ${1} ]]; then
    echo "Please pass the string to split as 1st argument"
    exit 1
  fi;
  text="${1}"

  if [[ -z ${2} ]]; then
    delimiter="-"
  else
    delimiter="${2}"
  fi

  if [[ -z ${3} ]]; then
    fragment_length=2
  else
    fragment_length="${3}"
  fi

  if [[ -z ${4} ]]; then
    sha_length=6
  else
    sha_length="${4}"
  fi

  result=$(echo "${text}" \
    | tr "${delimiter}" "\n" \
    | sed -E "s/(.{1,${fragment_length}}).*$/\1/" \
    | paste -s -d "${delimiter}")

  sha=$(echo "${text}" | sha256sum | head -c "${sha_length}")
  echo "${result}${delimiter}${sha}"
}

shorten "${@}"