gistfile1.rb

# Returns the RVM installation mode:
# :single - RVM is installed in single-user mode.
# :multi  - RVM is installed in multi-user mode.
# :mixed  - RVM is in a mixed-mode installation.
# nil     - The current Ruby interpreter is not using RVM.
def self.rvm_installation_mode
	if in_rvm?
		if ENV['rvm_path'] =~ /\.rvm/
			return :single
		else
			if GEM_HOME =~ /\.rvm/
				return :mixed
			else
				return :multi
			end
		end
	else
		return nil
	end
end