時分の環境でMinGW RubyとActiveRubyとJRubyを切り替えるために作った簡易バッチファイル

rubyshell.bat

@echo off
:: vim: set sts=4 ts=4 sw=4 expandtab:

setlocal ENABLEDELAYEDEXPANSION 
set _rubyhome_ruby=E:\Ruby\Ruby1.9
set _rubyhome_ruby18=E:\Ruby\Ruby1.8
set _rubyhome_ruby19=E:\Ruby\Ruby1.9
set _rubyhome_activeruby=E:\Ruby\ActiveRuby1.9
set _rubyhome_activeruby18=E:\Ruby\ActiveRuby1.8
set _rubyhome_activeruby19=E:\Ruby\ActiveRuby1.9
set _rubyhome_jruby=E:\Ruby\JRuby1.7
set _rubyhome_jruby17=E:\Ruby\JRuby1.7
set _rubyhome_default=E:\Ruby\Ruby1.9

set _rubyversion=%1
if "%1" == "" (
21set _rubyversion=default
)
if not "!_rubyhome_%_rubyversion%!" == "" (
	set PATH=!_rubyhome_%_rubyversion%!\bin;!PATH!
	cmd
) else (
	echo Unknown Ruby: !_rubyversion!
)

:END
endlocal