Trace calls to your deeply-nested CoffeeScript methods

traced.coffee

### traced.coffee
#
## Usage:
# class app.Class
#   method1: traced "app.Class.method1", ->
#     "return value of method1"
#
#   method2: traced "app.Class.method2, (prefix) ->
#     prefix + @method1()
#
# inst = new app.Class
# inst.method2("Prefix passed in")
#
## Result:
# > app.Class.method2 Prefix passed in
# >> app.Class.method1 
# << app.Class.method1 return value of method1
# < app.Class.method2 Prefix passed inreturn value of method1
#
###

traced = do ->
  depth = 0
  repeat = (chr, n) -> new Array(n).join(chr)

  (name, func) ->
    (args...) ->
      console.log repeat(">", ++depth), name, args
      ret = func.apply(@, args)
      console.log repeat("<", --depth), name, ret
      ret