Ruby 我使用MacPorts安装了Capistrano，但capify找不到Capistrano gem

在OS X 10.7.5 I上使用MacPorts安装capistrano，如下所示：

[~] > install rb-capistrano

但是，当我运行capify时，会出现以下错误：

/opt/local/lib/ruby/vendor_ruby/1.8/rubygems.rb:779:in `report_activate_error': Could not find RubyGem capistrano (>= 0) (Gem::LoadError)
from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems.rb:214:in `activate'
from /opt/local/lib/ruby/vendor_ruby/1.8/rubygems.rb:1082:in `gem'
from /opt/local/bin/capify-1.8:18

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这显然是capistrano、ruby和gems的MacPorts部署中的一个bug，但在此期间有什么方法可以解决这个问题吗？我只想让Capistrano工作，我根本不关心Ruby on Rails或任何Ruby的东西。

我的解决方法是：手动安装gem，或者使用rvm安装它，完全绕过MacPorts

我选择了选项1：使用“gem”安装Capistrano。当然，这涉及到安装MacPorts gem并修复安装以实际工作：

12:10 ~project ➤ which gem
/usr/bin/gem
12:10 ~project ➤ sudo port install rb-rubygems
12:11 ~project ➤ ln -s /opt/local/libexec/ruby1.8/gem /opt/local/bin/gem
12:11 ~project ➤ sudo gem install capistrano                                         
Successfully installed highline-1.6.19
Successfully installed net-ssh-2.6.7
Successfully installed net-ssh-gateway-1.2.0
Successfully installed capistrano-2.15.4
4 gems installed
Installing ri documentation for highline-1.6.19...
Installing ri documentation for net-ssh-2.6.7...
Installing ri documentation for net-ssh-gateway-1.2.0...
Installing ri documentation for capistrano-2.15.4...
Installing RDoc documentation for highline-1.6.19...
Could not find main page README
Could not find main page README
Could not find main page README
Could not find main page README
Installing RDoc documentation for net-ssh-2.6.7...
Installing RDoc documentation for net-ssh-gateway-1.2.0...
Installing RDoc documentation for capistrano-2.15.4...
12:12 ~project ➤ which capify
/opt/local/bin/capify
12:12 ~project ➤ capify .
[add] making directory './config'
[add] writing './config/deploy.rb'
[add] writing './Capfile'
[done] capified!

如您所见，gem通过安装到/opt/local/（即：MacPorts）目录为我做了“正确的事情”

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这一错误已向MacPorts报告为

，我绝对不会使用另一个包管理系统作为安装gems的代理。另外，Ruby 1.8已经过时，将不再接收安全更新；你应该立即升级到Ruby 2.0（或1.9）。遗憾的是，当你

sudo端口安装Ruby时，你会得到1.8。谢谢你的警告！正如@AndrewMarshall所提到的，在使用另一个包管理器时使用gem安装包是一件坏事。在这种情况下，清理混乱就像重新安装MacPorts一样简单（即：rm-rf/opt/local，然后从头开始）。我不会再破坏MacPorts了。