Does rails and other gems install documentation anywhere when you install them?

And where can I find it? I'm running OSX.

In addition I have to do a开发者_StackOverflow中文版 lot of work offline while travelling so if anyone can offer any tips for downloadable documentation please let me know.

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If you have installed your gems the "normal" way, they install rdoc documentation.

Just run gem server in your console and go to http://localhost:8808 in your browser. There you'll find all available Gems and the RDoc documentation

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http://railsapi.com provides you to download offline documentation for:

• Rails 2.2.2, 2.3.8, 3.0.8
• Ruby 1.8, 1.9.2
• Authlogic
• AWS-S3
• EventMachine
• Haml
• Hpricot
• Nokogiri
• Rack
• Rspec
• Sinatra

The downloadable file has wonderful jQuery search functionality, so it's pretty useful

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@klaustopher's answer didn't work for me directly, so here is how I got this to work for the rspec-expectations gem:

1. Install gem documentation by either

   • using the --rdoc flag: gem install --rdoc rspec-expectations
   • or by installing rdocs for all gems: gem rdoc --all

2. Run rdoc server.

gem server

3. Go to http://localhost:8808 in my browser.

Caveat: at a first glance the rdoc for rspec-expectations is pretty useless. I bet there is a better way to do this.