Module: ImageOptim::Cmd

Defined in:
lib/image_optim/cmd.rb

Overview

Helper for running commands

Class Method Summary collapse

Class Method Details

.capture(cmd) ⇒ Object

Run using backtick Return captured output Will raise SignalException if process was interrupted



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# File 'lib/image_optim/cmd.rb', line 43

def capture(cmd)
  output = `#{cmd}`

  check_status!

  output
end

.run(*args) ⇒ Object

Run using ‘system` Return success status Will raise SignalException if process was interrupted



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# File 'lib/image_optim/cmd.rb', line 13

def run(*args)
  if args.last.is_a?(Hash) && (timeout = args.last.delete(:timeout))
    args.last[Gem.win_platform? ? :new_pgroup : :pgroup] = true

    pid = Process.spawn(*args)

    waiter = Process.detach(pid)
    if waiter.join(timeout.to_f)
      status = waiter.value

      check_status!(status)

      status.success?
    else
      cleanup(pid, waiter)

      fail Errors::TimeoutExceeded
    end
  else
    success = system(*args)

    check_status!

    success
  end
end