Ruby Cookbook

Recipe 18.1. Finding Libraries by Querying Gem Respositories Problem You want to find new gems to install on your system, or see which gems you already have installed. Solution From the command line, use gem's query command: $ gem ...

Recipe 18.2. Installing and Using a Gem Problem You want to install a gem, then use the code it provides in your programs. Solution You can install the latest version of a gem with the gem install command. This command looks for an uni...

Recipe 18.3. Requiring a Specific Version of a Gem Problem Your program depends on an interface or feature of a gem found only in particular versions of the library. If a user tries to run your program with the wrong version installed, you w...

Recipe 18.4. Uninstalling a Gem Problem You want to remove an installed gem from your Ruby installation. Solution From the command line, use the gem uninstall command: $ gem uninstall blinkenlights Attempting to uninstall gem '...

Recipe 18.5. Reading Documentation for Installed Gems Problem You want to read the RDoc documentation for the gems you have installed. Although some gem projects provide human-written documentation like tutorials, the generated RDoc docume...

Recipe 18.6. Packaging Your Code as a Gem Problem You want to package a program you wrote as a Ruby gem, possibly to distribute it on the main gem server at rubyforge.org. Solution First, you must write a specification file. This fi...

Recipe 18.7. Distributing Your Gems Problem You've packaged your software as a Ruby gem, but nobody knows about it. You want to make your gem easy to find and install, so that your genius does not go unrecognized. Solution The simplest...