A bash script that compiles coffeescript and uglifies it. Requires node.js coffeescript and uglify-js

CoffeeUglify.sh

#!/bin/bash

function printHelp
{
  echo "-h displays this page"
  echo "-v displays the version information"
  echo "-f compiles and minifies a single file"
  echo "-d compiles and minifies all files in a directory"
  echo "-i checks dependendancies and installs them if node is installed"
}

function printVersion
{
  echo "Version 1.0"
}

function checkDependancies
{
  # If any of the dependancies are missing install them
  if [ -z $(which coffee) ] || [ -z $(which uglify-js) ]; then
    hash node 2>&- || { echo >&2 "node.js is required. Aborting"; exit 1; }
    hash npm 2>&- || { echo >&2 "npm is required to install dependencies. Aborting"; exit 1; }
    npm install -g coffee-script uglify-js
  else
    echo "Nothing to do"
  fi
}

function compileAndMinify
{
  # if the file exists
  if [ -f $1 ]; then
    # Get the dirname, filename, extension and define the names for the new files
    dir=$(dirname $1)
    file=$(basename $1)
    ext=${file##*.}
    file=${file%.*}
    jsfile="${dir}/${file}.js"
    shortjsfile="${dir}/${file}.min.js"
    
    # if the extension is coffee then compile the coffeescript
    if [ $ext == "coffee" ]; then
      coffee -c $1
      
      # if the coffeescript file exists then uglify it.
      if [ -f $jsfile ]; then
        uglifyjs -o $shortjsfile $jsfile
        echo "Compiled as ${jsfile} and Uglified as ${shortjsfile}"
      else
        echo "${jsfile} does not exist"
        exit 1;
      fi
    else
      echo "File (${file}) should have the '.coffee' extension"
      exit 1;
    fi
  else
    echo "${1} does not exist!"
    exit 1;
  fi
}

function parseDirectory
{
  # if the directory exists
  shopt -s nullglob
  if [ -d "$1" ]; then
    # Compile and Uglify files with the coffee extension
    for f in ${1}/*.coffee
    do
      compileAndMinify $f
    done
  else
    echo "${1} does not exist"
  fi
}

# Handles the options, must be after the functions
while getopts "hvf:d:i" option; do
  case "$option" in
    h) printHelp 0;;
    v) printVersion 0;;
    f) compileAndMinify "$OPTARG";;
    d) parseDirectory "$OPTARG";;
    i) checkDependancies 0;;
    [?]) printHelp 0;;
  esac
done

exit 0;