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 42

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 10

def run(*args)
  if Process.respond_to?(:spawn)
    if args.last.is_a?(Hash)
      args.last[Gem.win_platform? ? :new_pgroup : :pgroup] = true
    end

    begin
      pid = Process.spawn(*args)
    ensure
      yield pid if block_given?
    end

    begin
      Process.waitpid(pid)
    rescue Errno::ECHILD
      return
    end

    check_status!
    $CHILD_STATUS.success?
  else
    success = system(*args)

    check_status!

    success
  end
end