bundler_cap.rb

namespace :bundler do
  task :install do
    run("gem install bundler --source=http://gemcutter.org")
  end

  task :symlink_vendor do

    shared_gems = File.join(shared_path, 'vendor/gems')
    release_gems = "#{release_path}/vendor/gems"

    run "mkdir -p #{release_gems}"

    %w(cache gems specifications).each do |sub_dir|

      shared_sub_dir = File.join(shared_gems, sub_dir)
      release_sub_dir = File.join(release_gems, sub_dir)

      run "mkdir -p #{shared_sub_dir}"
      run "ln -fs #{shared_sub_dir}/ #{release_sub_dir}"

    end
  end

  # override the engineyard eycap task (which causes problems with how Gemfile is found from vendor/gems/environment.rb)
  task :bundle_gems do
    bundler.symlink_vendor
    run("cd #{release_path} && gem bundle --only #{rails_env}")
  end
end