Module: Maxima::Helper

Defined in:
lib/maxima/helper.rb

Class Method Summary collapse

Class Method Details

.spawn_silenced_shell_process(shell_command) ⇒ Object 



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# File 'lib/maxima/helper.rb', line 41

def self.spawn_silenced_shell_process(shell_command)
  stfu do
    rout, wout = IO.pipe
    result = nil
    begin
      pid = Process.spawn(shell_command, out: wout)
      _, _ = Process.wait2(pid)
    ensure
      wout.close
      if $interrupted
        rout.close
        throw :interrupted
      else
        result = rout.readlines.join("\n")
        rout.close
      end
    end
    result
  end
end

.stfu ⇒ Object 



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# File 'lib/maxima/helper.rb', line 10

def self.stfu
  result = nil
  begin
    orig_stderr = $stderr.clone
    orig_stdout = $stdout.clone
    $stderr.reopen File.new('/dev/null', 'w')
    $stdout.reopen File.new('/dev/null', 'w')
    result = yield
  rescue Exception => e
    if $interrupted
      throw :interrupted
    else
      $stdout.reopen orig_stdout
      $stderr.reopen orig_stderr
      raise e
    end
  ensure
    if $interrupted
      throw :interrupted
    else
      $stdout.reopen orig_stdout
      $stderr.reopen orig_stderr
    end
  end
  if $interrupted
    throw :interrupted
  else
    result
  end
end