module Rake::TaskManager

def lookup_in_scope(name, scope)

Lookup the task name 
def lookup_in_scope(name, scope)
  n = scope.size
  while n >= 0
    tn = (scope[0,n] + [name]).join(':')
    task = @tasks[tn]
    return task if task
    n -= 1
  end
  nil
end