example.rb

Camping.goes :Example
Example.needs :Cool

implementation.rb

def Camping.plugin(name)
  file = caller.first[/^(.*?):(\d+): in/, 1]
  @plugins[name] = IO.read(file)
end

def Camping.needs(name)
  if code = @plugins[name]
    eval(code.gsub("Cam\ping", "Camping"), TOPLEVEL_BINDING)
  end
end

plugin.rb

Camping.plugin :Cool

module Camping
  
end