RubyGem

What?

Why?

How to write a rubygem?

$ bundle gem <gem name>

<gem name>.gemspec

http://guides.rubygems.org/specification-reference/

lib/<gem name>.rb

$ gem build <gem name>.gemspec

How to install a rubygem?

$ gem install <gem name>.gem

$ irb• require ‘rubygems’ (only in 1.8)• require ‘<gem name>’• then test and enjoy it …

Question: What does “require ‘rubygems’” do?What does “require ‘<gem name>’” do?

Push your new gem to rubygems.org

$ gem push <gem name>.gem

How to use a gem in a project?

in Rails 2.3?

in Rails 3?

Recommendations

Vendorize a gem in Rails

Pack gems into a project

$ bundle package

$ bundle exec <command>

GemBundler

How does it work?

Why is GemBundler better?

Can Rails 2.3 use it?

Thank you!