From: Robert Klemme <bob.news@...>
Date: 2005-04-02T16:24:44+09:00
Subject: Re: Kernel.load() behaviour


"Andrew Walrond" <andrew@walrond.org> schrieb im Newsbeitrag 
news:200504020041.35224.andrew@walrond.org...
> On Saturday 02 April 2005 00:34, Andrew Walrond wrote:
>> My final solution, taking the above into account:
>>
>> c.rb
>>  class Glibc
>>  end
>>
>> b.rb
>>  inline 'c.rb'
>>
>>  class Gcc
>>  end
>>
>> a.rb
>>  module Packages
>>    def Packages.inline(filename)
>>      eval(IO.readlines(filename).join,nil,filename)

You can shorten that to
eval( File.read(filename), nil, filename )

>>    end
>>    inline('c.rb')
>>  end
>>
>>  Packages::Gcc.new
>>  Packages::Glibc.new
>>
>
> My final puzzle before sleep; How to throw an exception if any of the 
> package
> files try to use require() or load() instead of inline() ? (My package
> developers might forget and pollute the global namespace)
>
> Is there a neat way?

I posted an approach for temporarily exchanging methods a while ago which 
can be used for this under subject "Mocking new and other class methods":

module Kernel
private
  def mock(obj, sym, mock)
    cl = class <<obj; self; end
    old = obj.method sym
    cl.class_eval { define_method(sym, &mock) }

    begin
      yield
    ensure
      cl.class_eval { define_method(sym, &old) }
    end
  end
end

Something along these lines:

mock Kernel, :require, lambda {|f1| inline f} do
  mock Kernel, :load, lambda {|f2,*| inline f2} do
    require ...
  end
end

Kind regards

    robert