升级ruby gem
- gem update –system
查看gem版本
- gem -v
查看gem版本，gems安装目录，remote sources等
- gem env
查看已经添加的remote sources
- gem sources
添加一个source
- gem sources -a ‘htt://rubygems.org’
安装一个gem包
- gem install will_paginate
指定源位置
- gem install will_paginate –source ‘http://rubygems.org’
- gem install will_paginate -s ‘http://rubygems.org’
指定版本
- gem install rails -v=2.3.5
查看已经安装的全部gem包
- gem list
或者 gem list -d 查看具体的信息，例如project的author，homepage，安装在系统中的路径 等信息，建议加上该参数…
查看d开头的gem包
- gem list d
更详细的查看
- gem list will_paginate -d
卸载gem包
- gem uninstall rails
卸载指定版本
- gem uninstall rails -v=2.1.0
查找gem包
- gem search will_paginate –both (在local和remote源中search含有will_paginate关键字的)
- gem list -r will_paginate
- gem list -dr will_paginate (我常用这个)
查看gem包依赖其他的gem：
- gem dependency rails -v 2.3.5
- Gem rails-2.3.5
- actionmailer (= 2.3.5, runtime)
- actionpack (= 2.3.5, runtime)
- activerecord (= 2.3.5, runtime)
- activeresource (= 2.3.5, runtime)
- activesupport (= 2.3.5, runtime)
- rake (>= 0.8.3, runtime)
查看gem包的rdoc帮助
- gem server (然后http://localhost:8808查看)
windows 平台上安装
- gem install hpricot –platform=mswin32 # 不指定在windows安装会报错
不安装ri 和 rdoc
- gem install hpricot –no-ri –no-rdoc
查看更多的gem帮助，可以
- gem -h
项目里常用gem命令
- rake -T gems:
- (in /usr/local/system/entos/netposa_redmine)
- rake gems:build # Build any native extensions for unpacked gems
- rake gems:build:force # Force the build of all gems
- rake gems:install # Installs all required gems.
- rake gems:refresh_specs # Regenerate gem specifications in correct format.
- rake gems:unpack # Unpacks all required gems into vendor/gems.
- rake gems:unpack:dependencies # Unpacks all required gems and their dependencies into vendor/gems.
例如你enviroment.rb 中配置了paperclip gem
- config.gem ‘paperclip’, ‘2.3.5’
那么
- rake gems:install
将会安装paperclip 2.3.5 到你的ruby目录里,
- rake gems:unpack:dependencies
将会把依赖的gem包unpack 到vendor/gems 目录下,
如果你是直接从gem包copy 到vendor/gems 目录下的话,需要执行
- rake gems:refresh_specs
来生成 .specifications 文件