Rake::CLI in CoffeeScript

gistfile1.coffee

Namespaces =
  names: []
  descriptions: []
  tasks: []
  
  injectMethods: (ins) ->
    nspaces = @
    ins.fqn = ->
      @_nameChain().join ':'
      
    ins.prefix = ->
      chain = @_nameChain()
      chain.pop()
      chain.join ':'
      
    ins._nameChain = (nspace, chain) ->
      nspace ?= @
      chain ?= []

      chain.unshift(nspace.name)

      if nspace.parent?
        chain = nspace._nameChain nspace.parent, chain
      chain
      
    ins._addTask = (task) ->
      if nspaces.descriptions.length isnt 0 then task.description = nspaces.descriptions.shift()
      nspaces.tasks.push task
    
  add: (namespace) ->
    
    @injectMethods namespace
    @names.push
      name: namespace.name
      prefix: namespace.prefix()
      
  remove: (namespace) ->
    name = switch typeof(namespace)
      when "object"
        namespace.name
      when "string"
        namespace
        
    newList = for ns in @names
      ns if ns.name isnt name
      
    @names = newList if newList.length isnt @names.length
        
      

class Namespace
  constructor: (@name, @parent) ->
    @parent ?= null
    @registerNamespace()
    
  addTask: (task) ->
    task._setPrefix @fqn()
    @_addTask task
    
  findTask: (name) ->
    
  runTask: (name) ->
    
  registerNamespace: ->
    Namespaces.add @
    
class Task
  constructor: (@name, callback) ->
    @description = null
    
  _setPrefix: (@prefix) ->
    @prefix ?= ""
    
  fqn: () ->
    "#{@prefix}#{@name}"
    
namespace = (name, cbk) ->
  @ns = new Namespace name, null
  namespace = (name, cbk) =>
    this.ns = new Namespace name, @ns
    cbk()
  cbk()
  
task = (name, callback) ->
  _task = new Task name, callback
  @ns.addTask _task
  
  desc = (description) ->
    Namespaces.descriptions.push description