A port of Merb's dependency system to a Rails plugin.

1. Install the plugin

    script/plugin install git://github.com/ddollar/dependencies.git
   

2. Add the following line to your config/environment.rb

    config.plugins = [:dependencies, :all]
   

3. Add the following line to your .gitignore

    gems
   

4. Create a config/dependencies.rb file that looks like:

    dependency 'gem'
    dependency 'gem', '1.0.1'
    dependency 'gem', :require_as => 'Gem'
    dependency 'gem', :only => %w(test staging)
    dependency 'gem', :except => 'production'
   
    with_options(:only => 'test') do |test|
      test.dependency 'tester-gem'
    end
   

5. Remove or comment out any config.gem lines from config/environment.rb or config/environments/*.rb

6. Install the gems into your project and keep them up to date using:

    rake dependencies:sync
   

7. Alternatively you can use the following rake task to read your existing config.gem declarations and output a file suitable for this plugin. This task will appropriately handle any gems that you are currently loading on a per-environment basis as well.

    rake dependencies:import
   

Initial idea and Rubygems extension code from Merb

Rewritten for Rails by David Dollar (@ddollar)

Documentation, testing, ideas by Steven Soroka (@ssoroka)