Class: Blower::Puff

Inherits:
Object
  • Object
show all
Defined in:
lib/blower/puff.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(huff, host) ⇒ Puff

Returns a new instance of Puff.



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# File 'lib/blower/puff.rb', line 9

def initialize (huff, host)
  @huff = huff
  @log = huff.log
  @host = host
  @env = {}
end

Instance Attribute Details

#env ⇒ Object

Returns the value of attribute env.



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# File 'lib/blower/puff.rb', line 7

def env
  @env
end

#host ⇒ Object

Returns the value of attribute host.



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# File 'lib/blower/puff.rb', line 7

def host
  @host
end

#huff ⇒ Object

Returns the value of attribute huff.



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# File 'lib/blower/puff.rb', line 7

def huff
  @huff
end

#log ⇒ Object

Returns the value of attribute log.



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# File 'lib/blower/puff.rb', line 7

def log
  @log
end

Instance Method Details

#env2shell ⇒ Object 



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# File 'lib/blower/puff.rb', line 16

def env2shell ()
  huff.env.merge(@env).map do |name, value|
    next unless name =~ /\A[A-Za-z\d_]+\z/
    "#{name}=#{value.shellescape}"
  end.join("\n") + "\n"
end

#shell(task) ⇒ Object 



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# File 'lib/blower/puff.rb', line 23

def shell (task)
  Net::SSH.start(host, "root") do |ssh|
    command = File.read(task)
    status, signal = nil, nil
    ssh.open_channel do |ch|
      stdout, stderr = "", ""
      ch.exec(env2shell + command) do |_, success|
        fail "failed to execute command" unless success
        ch.on_data do |_, data|
          stdout << data
          if i = stdout.rindex(/[\n\r]/)
            data, stdout = stdout[0..i], (stdout[(i + 1)..-1] || "")
            log.log data
          end
        end
        ch.on_extended_data do |_, _, data|
          stderr << data
          if i = stderr.rindex(/[\n\r]/)
            data, stderr = stderr[0..i], (stderr[(i + 1)..-1] || "")
            log.fail data
          end
        end
        ch.on_request("exit-status") { |_, data| status = data.read_long }
        ch.on_request("exit-signal") { |_, data| signal = data.read_long }
      end
    end
    ssh.loop
    if status != 0
      fail "exit status #{status}"
    end
  end
end