Do something with bash script

do.sh

#!/bin/bash

set -euo pipefail

function print_bold {
  local text_bold=$(tput bold)
  local text_normal=$(tput sgr0)
  echo "${text_bold}$1${text_normal}"
}

function print_error {
  local text_red=$(tput setaf 1)
  local text_normal=$(tput sgr0)

  echo "${text_red}$1${text_normal}"
}

function print_info {
  local text_yellow=$(tput setaf 3)
  local text_normal=$(tput sgr0)

  echo "${text_yellow}$1${text_normal}"
}

function print_usage {
  print_bold  "Usage::"
  print_info  "    ./bin/do <command> <arguments>"
  echo
  print_bold  "Commands::"
  print_info  "    help"
  echo        "    - displays this usage"
  print_info  "    generate"
  echo        "    - automatically generates something based on input"
  print_info  "        component <name>"
  echo        "        - Creates a component skeleton"
  echo        "        - <name> is in UpperCamelCase"

}

function run_command {
  BASE_LOCATION=./src/components

  COMMAND=$1
  SUBJECT=$2
  ARGUMENTS=$3
  LOCATION=$BASE_LOCATION/$ARGUMENTS

  if [[ $COMMAND == generate ]]; then
    echo Generating a component called $ARGUMENTS in $LOCATION
    ts-node ./bin/$COMMAND/index.ts $SUBJECT $ARGUMENTS
  fi
}

function main {
  if [[ $@ == help ]]; then
    print_usage
    exit 0
  fi

  if [[ "$#" -ge 3 ]]; then
    run_command $@
  else
    echo
    print_error "Invalid usage"
    echo
    print_usage
    echo
    exit 0
  fi
}

main "$@"