CoffeeScript SCSS compiler

require "coffee-script"
require "sass"

SASS = true
COFFEE = true

ScssDir = 'scss'
CssDir = '../css'
CoffeeDir = 'coffee'
JsDir = '../js'

module CoffeeScript
    class << self
        def compile_file(file, js_file)
            f = File.open(js_file, "wb")
            s = File.open(file, "rb")
            f.write compile(s.read)
            f.close
        end
    end
end

def change_names(arr)
    arr.map {|n|
        case File.extname(n)
        when ".scss"
            n.sub(ScssDir, CssDir).sub(".scss",".css")
        when ".coffee"
            n.sub(CoffeeDir, JsDir).sub(".coffee",".js")
        end
    }
end

scss = File.join("**", "*.scss") if SASS
coffee = File.join("**", "*.coffee") if COFFEE

Dir.mkdir CssDir if SASS and !Dir.exists? CssDir
Dir.mkdir JsDir if COFFEE and !Dir.exists? JsDir

scssFiles = Dir.glob(scss) if SASS
cssFiles = change_names(scssFiles) if SASS
coffeeFiles = Dir.glob(coffee) if COFFEE
jsFiles = change_names(coffeeFiles) if COFFEE

if SASS
    for i in 0...scssFiles.size
        Sass.compile_file(scssFiles[i], cssFiles[i])
    end
end

if COFFEE
    for i in 0...coffeeFiles.size
        CoffeeScript.compile_file(coffeeFiles[i], jsFiles[i])
    end
end