Class: Pytty::Daemon::ProcessYield

Inherits:
Object
  • Object
show all
Defined in:
lib/pytty/daemon/process_yield.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cmd, id: nil, env: {}) ⇒ ProcessYield

Returns a new instance of ProcessYield.



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# File 'lib/pytty/daemon/process_yield.rb', line 7

def initialize(cmd, id:nil, env:{})
  @cmd = cmd
  @env = env

  @pid = nil
  @id = id || SecureRandom.uuid

  @stdouts = []
  @stdin = Async::Queue.new
end

Instance Attribute Details

#cmd ⇒ Object (readonly)

Returns the value of attribute cmd.



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# File 'lib/pytty/daemon/process_yield.rb', line 18

def cmd
  @cmd
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/pytty/daemon/process_yield.rb', line 18

def id
  @id
end

#pid ⇒ Object (readonly)

Returns the value of attribute pid.



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# File 'lib/pytty/daemon/process_yield.rb', line 18

def pid
  @pid
end

#stdin ⇒ Object

Returns the value of attribute stdin.



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# File 'lib/pytty/daemon/process_yield.rb', line 19

def stdin
  @stdin
end

#stdouts ⇒ Object

Returns the value of attribute stdouts.



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# File 'lib/pytty/daemon/process_yield.rb', line 19

def stdouts
  @stdouts
end

Instance Method Details

#cont ⇒ Object 



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# File 'lib/pytty/daemon/process_yield.rb', line 79

def cont
  Process.kill("CONT", @pid)
end

#kill ⇒ Object 



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# File 'lib/pytty/daemon/process_yield.rb', line 83

def kill
  Process.kill("KILL", @pid)
end

#running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/pytty/daemon/process_yield.rb', line 21

def running?
  !@pid.nil?
end

#signal(sig) ⇒ Object 



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# File 'lib/pytty/daemon/process_yield.rb', line 71

def signal(sig)
  Process.kill(sig, @pid)
end

#spawn ⇒ Object 



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# File 'lib/pytty/daemon/process_yield.rb', line 35

def spawn
  executable, args = @cmd
  @env.merge!({
    "TERM" => "vt100"
  })

  Async::Task.current.async do |task|
    p ["spawn", executable, args, @env]

    real_stdout, real_stdin, pid = PTY.spawn @env, executable, *args
    @pid = pid
    async_stdout = Async::IO::Generic.new real_stdout
    async_stdin = Async::IO::Generic.new real_stdin

    task.async do |subtask|
      while c = @stdin.dequeue do
        p c
        async_stdin.write c
      end
    end

    while c = async_stdout.read(1)
      @stdouts.each do |s|
        begin
          s.write c
        rescue Errno::EPIPE => ex
          puts "cannnot write, popping"
          @stdouts.pop
        end
      end
    end
    puts "CLOSED"
    #stdout.close
  end

end

#term ⇒ Object 



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# File 'lib/pytty/daemon/process_yield.rb', line 87

def term
  Process.kill("TERM", @pid)
end

#to_json(json_generator_state = nil) ⇒ Object 



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# File 'lib/pytty/daemon/process_yield.rb', line 25

def to_json(json_generator_state=nil)
  {
    id: @id,
    pid: @pid,
    cmd: @cmd,
    env: @env,
    running: running?
  }.to_json
end

#tstp ⇒ Object 



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# File 'lib/pytty/daemon/process_yield.rb', line 75

def tstp
  Process.kill("TSTP", @pid)
end