BelleLearnsRuby/RubyGems_Guide.text at master · lienne/BelleLearnsRuby · GitHub

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Basics

--> RubyGems is a sophisticated package manager for Ruby.
--> 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.

--> Gems can be used to extend or modify functionality in Ruby applications.
--> Commonly they're used to distribute reusable functionality that is shared
    with other Rubyists for use in their applications and libraries.
--> Some gems provide command line utilities to help automate tasks and speed
    up your work.


Commands

--> The `gem` command allows you to interact with RubyGems.
--> The `search` command lets you find remote gems by name.
    You can also use regex in your query.
--> The `install` command downloads and installs the gem and any necessary
    dependencies then builds documentation for the installed gems.
    * You can disable documentation generation using `--no-doc` arg.
--> The `list` command shows your locally installed gems.
--> The `uninstall` command removes the gems you have installed.
--> You can view the documentation for your installed gems with `ri`.
--> You can view the documentation for your installed gems in your browser
    with the `server` command.
    You can access this documentation at http://localhost:8080

Requiring Code

--> RubyGems modifies you+r local Ruby load path, which controls how your
    Ruby code is found by the `require` statement.
--> When you `require` a gem, really you're just placing that gem's lib
    directory onto your $LOAD_PATH.