LoadEval proof of concept

load_eval.rb

module LoadEval
  class << self
    def contexts
      @contexts ||= []
    end

    def load_within_context(object, file)
      contexts << [object, file]
      load('load_eval_proxy.rb', true)
    ensure
      contexts.pop
    end
  end

  def load_eval(file)
    LoadEval.load_within_context(self, file.sub(/^([^\.]+)$/, '\1.rb'))
  end
end

load_eval_proxy.rb

instance_variables = method(:instance_variables)

class << self
  instance_methods.each { |method| undef_method method }

  def method_missing(method, *arguments, &block)
    LoadEval.contexts.last.first.__send__(method, *arguments, &block)
  end
end

load LoadEval.contexts.last.last

instance_variables.call.each { |variable| instance_variable_set(variable, eval(variable.to_s)) }

load_eval_test.rb

class LoadEvalTest
  def call_me
    puts 'I was called'
  end
end

LoadEvalTest.new.load_eval('load_me_in_context')

load_me_in_context.rb

call_me