Module: Chee::DSL

Included in:
Chee
Defined in:
lib/Chee.rb

Instance Method Summary collapse

Instance Method Details



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# File 'lib/Chee.rb', line 32

def print_data d
  print d
  STDOUT.flush
end

#server(*args) ⇒ Object 



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# File 'lib/Chee.rb', line 25

def server *args
  return @server if args.empty?
  server_array << args
  server_array.uniq!
  @server = args
end

#server_array ⇒ Object 



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# File 'lib/Chee.rb', line 21

def server_array
  @server_array ||= []
end

#ssh(raw_cmd) ⇒ Object

Thread technique came from: stackoverflow.com/questions/6942279/ruby-net-ssh-channel-dies



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# File 'lib/Chee.rb', line 48

def ssh raw_cmd
  command = raw_cmd.strip
  if command["\n"]
    return command.split("\n").map(&:strip).map { |s|
      ssh s
    }
  end
  stdout = ""
  stderr = ""
  t      = nil # used to store a Thread

  ip, user, new_opts = *server
  opts = {:timeout=>3}.merge(new_opts || {})

  begin

    get_input = true
    @channel  = nil
    cmd       = ''
    prev_cmd  = ''
    prev_data = ''
    result    = Result.new

    t = Thread.new { 

      while get_input do

        cmd = begin
                Readline.readline("", true).strip
              rescue Interrupt => e # Send CTRL-C:
                get_input = false
                "^C"
              end

        if @channel
          @channel.process
        else
          print "Connection closed. Could not send: #{cmd}\n"
        end

      end 

    }

    Net::SSH.start(ip, user, opts) { |ssh|

      @channel = ssh.open_channel do |ch1|

        ch1.on_extended_data do |ch, type, d|
          stderr << d
        end

        ch1.on_request 'exit-status' do |ch, d|
          result.exit_status d.read_long
        end

        ch1.on_open_failed { |ch, code, desc|
          stderr << "Failure to open channel: #{code.inspect}: #{desc}"
        }

        ch1.on_process do |ch|
          if cmd.strip == '^C'
            #ch.close
            ch.send_data( Net::SSH::Buffer.from(:byte, 3, :raw, "\n").to_s )
            stderr << "User requested interrupt."
          else
            if cmd.strip.empty?
              # ignore it
            else
              ch.send_data( "#{cmd}\n" ) 
              prev_cmd = cmd
              cmd = ''
            end
          end
        end

        ch1.on_data do |ch, d|

          stdout << d # .sub(%r!\r?\n\Z!,'')

          unless prev_cmd.to_s.strip == d.strip
            print_data d
          end

          prev_data = d
        end

        ch1.request_pty do |ch, success|
          if success
            # do nothing
          else
            ch.close
            (stderr << "Unknown error requesting pty.") 
          end
        end

        ch1.exec(command)

      end

      ssh.loop 0.1
    } # === Net::SSH.start

  rescue Timeout::Error  => e
    raise e.class, server.inspect

  rescue Net::SSH::AuthenticationFailed => e
    raise e.class, "Using: #{server.inspect}"

  ensure
    get_input = false
    t.exit if t
  end

  result.err stderr
  result.out stdout
  
  if !result.err.empty? || result.exit_status != 0
    e = Exit_Error.new("Exit: #{result.exit_status}, COMMAND: #{command}")
    e.exit_status result.exit_status
    e.out         result.out
    e.err         result.err
    raise e
  end

  result.out.strip!
  result
end

#ssh_to_all(command) ⇒ Object 



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# File 'lib/Chee.rb', line 37

def ssh_to_all command
  @server_array.map { |opts|
    server *opts
    ssh command
  }.flatten
end