Template `./go` script as a main entrypoint into the development environment (http://www.thoughtworks.com/insights/blog/praise-go-script-part-i)

go

#!/bin/bash
set -e

SCRIPT_DIR=$(cd $(dirname $0) ; pwd -P)

die() {
  red=$(tput setaf 1)
  normal=$(tput sgr0)

  echo "${red}${1}${normal}"
  exit 1
}

goal_say_hello() { ## just says hello, without any parameters
  echo "Hello World!"
  echo "This script is in ${SCRIPT_DIR}"
}

goal_say_something() { #<message> [sayer]# say a message customized with parameters
  message="${1}"
  sayer="${2:-the script}"

  test -n "${message}" || die "Needs a message"

  echo "${message} from ${sayer}"
}

goal_help() { ## this help message
  bold=$(tput bold)
  normal=$(tput sgr0)
  echo "usage: ${bold}$0 <goal>${normal}
goals:"
  cat "$0" | sed -nr -e "s/goal_([a-zA-Z0-9_-]+).*#(.*)# *(.*)/    ${bold}\1${normal} \2 |--- \3/p" | column -ts '|' | sort
  exit 1
}

if type -t "goal_$1" &>/dev/null; then
  goal_$1 "${@:2}"
else
  goal_help
fi

Cool