类比于C#中的包,Java中的package,Ruby程序中的代码库( ruby software packages)叫RubyGem,简称Gem。一个Ruby程序会有很多Gem,这些Gem之间有依赖关系。而管理这些依赖关系的是Bundle,Bundle使用Ruby程序的gemfile中保存的Gem信息,下载及更新Gem。
The RubyGems software allows you to easily download, install, and use ruby software packages on your system. The software package is called a “gem” which contains a packaged Ruby application or library.
参考:
https://guides.rubygems.org/
what-is-a-gem
同时,gem也是一个工具,用于安装ruby software package到全局库中,即路径:
/[Ruby root]/lib/ruby/gems/[ver]/ 目录 。
参考:
https://blog.csdn.net/qq_35209838/article/details/86320880