Class: Rerun::Runner

Inherits:
Object
  • Object
show all
Includes:
System
Defined in:
lib/rerun.rb

Instance Method Summary collapse

Methods included from System

#app_name, #growl, #growl?, #growlcmd, #icon

Constructor Details

#initialize(run_command, options = {}) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/rerun.rb', line 12

def initialize(run_command, options = {})
  @run_command, @options = run_command, options
end

Instance Method Details

#dir ⇒ Object 



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# File 'lib/rerun.rb', line 23

def dir
  @options[:dir] || "."
end

#git_head_changed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rerun.rb', line 116

def git_head_changed?
  old_git_head = @git_head
  read_git_head
  @git_head and old_git_head and @git_head != old_git_head
end

#join ⇒ Object 



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# File 'lib/rerun.rb', line 92

def join
  @watcher.join
end

#notify(title, body) ⇒ Object 



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# File 'lib/rerun.rb', line 127

def notify(title, body)
  growl title, body
  puts
  puts "#{Time.now.strftime("%T")} - #{app_name} #{title}"
end

#read_git_head ⇒ Object 



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# File 'lib/rerun.rb', line 122

def read_git_head
  git_head_file = File.join(dir, '.git', 'HEAD')
  @git_head = File.exists?(git_head_file) && File.read(git_head_file)
end

#restart ⇒ Object 



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# File 'lib/rerun.rb', line 16

def restart
  @restarting = true
  stop
  start
  @restarting = false
end

#running? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rerun.rb', line 96

def running?
  signal(0)
end

#signal(signal) ⇒ Object 



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# File 'lib/rerun.rb', line 100

def signal(signal)
  Process.kill(signal, @pid)
  true
rescue
  false
end

#start ⇒ Object 



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# File 'lib/rerun.rb', line 27

def start
  if windows?
    raise "Sorry, Rerun does not work on Windows."
  end

  if (!@already_running)
    taglines = [
      "To infinity... and beyond!",
      "Charge!",
      ]
    notify "Launched", taglines[rand(taglines.size)]
    @already_running = true
  else
    taglines = [
      "Here we go again!",
      "Once more unto the breach, dear friends, once more!", 
    ]
    notify "Restarted", taglines[rand(taglines.size)]
  end

  @pid = Kernel.fork do
    begin
      # Signal.trap("INT") { exit }
      exec(@run_command)
    rescue => e
      puts e
      exit
    end
  end
  Process.detach(@pid) # so if the child exits, it dies

  Signal.trap("INT") do  # INT = control-C
     stop # first stop the child
     exit
   end

  begin
    sleep 2
  rescue Interrupt => e
    # in case someone hits control-C immediately
    stop
    exit
  end

  unless running?
    notify "Launch Failed", "See console for error output"
    @already_running = false
  end

  unless @watcher
    watcher_class = mac? ? OSXWatcher : FSWatcher
    # watcher_class = FSWatcher
  
    watcher = watcher_class.new do
      restart unless @restarting
    end
    puts "Watching #{dir}"
    watcher.add_directory(dir, "**/*.rb")
    watcher.sleep_time = 1
    watcher.start
    @watcher = watcher
  end

end

#stop ⇒ Object 



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# File 'lib/rerun.rb', line 107

def stop
  if @pid && (@pid != 0)
    notify "Stopped", "All good things must come to an end." unless @restarting
    signal("KILL") && Process.wait(@pid)
  end
rescue => e
  false
end