acquire_lock

in chefctl/src/chefctl.rb [792:823]

• 25 lines of code
• 5 McCabe index (conditional complexity)

    def acquire_lock
      if Chefctl::Config.immediate
        Chefctl.lib.stop_or_wait_for_chef(@paths[:chef_cur])
      end

      Chefctl.logger.debug("Trying lock #{@lock[:file]}")
      acquired = wait_for_lock(-1)
      unless acquired
        held = 'another process'
        unless Chefctl.lib.is_a?(Chefctl::Lib::Windows)
          File.open(@lock[:file], 'r') do |f|
            held = f.read.strip
          end
        end
        Chefctl.logger.info("#{@lock[:file]} is locked by #{held}, " +
                            "waiting up to #{@lock[:time]} seconds.")
        unless wait_for_lock(@lock[:time])
          quit "Unable to lock #{@lock[:file]}"
        end
      end
      Chefctl.logger.debug("Lock acquired: #{@lock[:file]}")

      
      @lock[:fd].truncate(0)
      @lock[:fd].write(Process.pid.to_s)

      
      @lock[:fd].flush

      @lock[:held] = true
    end