namespace :externals do
 
  desc "List"
  task :list do
    externals = YAML.load_file("#{Rails.root}/config/externals.yml")
    externals.each do |external|
      puts "[#{external.first}]"
      external.last.each { |key, value| puts "- #{key}: #{value}" }
    end
  end
 
  desc "Update"
  task :update do
    externals = YAML.load_file("#{Rails.root}/config/externals.yml")
    externals.each do |external|
      folder = external.first
      repository = external.last['repository']
      revision = external.last['revision']
      unless File.exists?(folder)
        `git clone #{repository} #{folder}`
        puts "[#{folder}]\n - Cloning #{repository}"
      end
      Dir.chdir(folder) do
        `git pull`
        `git checkout #{revision}`
        puts "[#{folder}]\n - Pulled & checked out #{revision}"
      end
    end
  end
 
end