Capistrano 3 console (Rails/SSH) tasks

console.cap

namespace :rails do
  desc 'Opens the Rails console'
  task :console => ['deploy:set_rails_env'] do
    on primary fetch(:migration_role) do
      within release_path do
        with rails_env: fetch(:rails_env) do
          cmd_string = command(:rails, 'console').to_command
          exec 'ssh %s -l %s -p %s -t "%s"' % [
            host.hostname, host.username, host.port, cmd_string]
        end
      end
    end
  end
end

namespace :deploy do
  desc 'Opens an interactive remote shell'
  task :console do
    on roles(:all) do
      exec 'ssh %s -l %s -p %s' % [
        host.hostname, host.username, host.port]
    end
  end
end