namespace :deploy do
  namespace :commit do

    def capistrano_commit_roles
      fetch(:capistrano_commit_role, :all)
    end

    desc <<-DESC
      Save information about deployed revisions into database.
    DESC
    task :save do
      on roles(capistrano_commit_roles) do |host|

        invoke 'deploy:set_current_revision'
        rev = fetch(:current_revision)

        info "Host: #{host}, Revision: #{rev}"

        within current_path do
          with rails_env: fetch(:rails_env) do
            execute :rake, 'capistrano:commit:save', "HOST=#{host}", "REVISION=#{rev}"
          end
        end

      end
    end

    desc <<-DESC
      Show information about deployed revisions.
    DESC
    task :show do
      on roles(capistrano_commit_roles) do |host|

        invoke 'deploy:set_current_revision'
        rev = fetch(:current_revision)

        info "Host: #{host}, Revision: #{rev}"
      end
    end

  end
end