jruby 下升级 gem 版本的问题

ruby的三方包管理工具是gem，jruby自然也不例外，但是最近遇到一个问题：新安装的jruby不能成功的升级 gem 系统

 

$ gem update --system
Updating RubyGems
Updating rubygems-update
Successfully installed rubygems-update-1.8.1
Updating RubyGems to 1.8.1
Installing RubyGems 1.8.1
/home/john/.rvm/rubies/jruby-1.5.6/lib/ruby/site_ruby/1.8/rubygems/defaults/jruby.rb:1224:in `require': undefined method `set_paths' for class `#<Class:01x5bf8d5b0>' (NameError)
	from /home/john/.rvm/gems/jruby-1.5.6/gems/rubygems-update-1.8.1/lib/rubygems.rb:1224
	from /home/john/.rvm/gems/jruby-1.5.6/gems/rubygems-update-1.8.1/lib/rubygems.rb:24:in `require'
	from setup.rb:24

 

这个应该是 gem 1.8.1 的 bug ，处理的方式是使用升级到 1.7.2 ，这个需要手工完成：

# 下载 http://production.cf.rubygems.org/rubygems/rubygems-update-1.7.2.gem 然后执行下面的命令
$ gem install --local ./rubygems-update-1.7.2.gem 
Successfully installed rubygems-update-1.7.2
1 gem installed
Installing RDoc documentation for rubygems-update-1.7.2...
$ update_rubygems 
RubyGems 1.7.2 installed

=== 1.7.2 / 2011-04-05

* 1 Bug Fix:
  * Warn on loading bad spec array values (ntlm-http gem has nil in its cert
    chain)


------------------------------------------------------------------------------

RubyGems installed the following executables:
	/home/john/.rvm/rubies/jruby-1.5.6/bin/jgem

$ gem -v
1.7.2

 

(这篇博客的内容将被添加到之前的培训系列中)