deploy.rb

set :git_reuse_repo, true

class Vlad::Git

  def checkout(revision, destination)
    destination = File.join(destination, 'repo')
    revision = 'HEAD' if revision =~ /head/i

    cached_upate = [
      "cd #{destination}",
      "#{git_cmd} fetch origin",
      "#{git_cmd} reset --hard origin/#{revision}"
    ].join " && "

    clone = [
      "#{git_cmd} clone #{repository} #{destination}",
      "cd #{destination}",
      "#{git_cmd} checkout -f -b deployed-#{revision} #{revision}"
    ].join " && "

    update = if defined?(git_reuse_repo) && git_reuse_repo
      "if [ -e #{destination} ]; then #{cached_upate}; else #{clone}; fi"
    else
      "rm -rf #{destination} && #{clone}"
    end

    "sh -c \"#{update}\""
  end

end