From: Andrew Walrond <andrew@...>
Date: 2005-07-02T20:32:15+09:00
Subject: Re: Loading a file without cluttering the global namespace

This is what I do in Heretix:

#
# Packages is a container class for all package classes.
# it is used to prevent the Package class names from polluting the global namespace
#
module Packages
    # Some package files need to 'require' other package files. The inline function
    # ensures that the inclusion occurs within the Packages module as load() and require()
    # both pollute the global namespace. If package files need to include other package
    # files (eg perl module needs perl.rb) they must use inline() rather than require()
    # or load(), which are removed to prevent their use (in the Package.load() function).
    #
    def Packages.inline(filename)
        Packages.module_eval(IO.read(filename),filename)
    end
end

    def Package.load()

        # Load the package classes into the Packages namespace. load() and require()
        # both pollute the global namespace, so use some trickery instead. If package
        # files need to include other package files (eg perl module needs perl.rb)
        # they must use inline() rather than require() or load(), which are removed
        # so that relevant warnings are produced when package developers forget...
        #
        Kernel#remove_method :require
        Kernel#remove_method :load
        HERETIXDIR.cd {
            Dir.glob('core/packages/*.rb').each    { |fn| Packages.inline(fn) }
            Dir.glob('contrib/packages/*.rb').each { |fn| Packages.inline(fn) }
        }

	...