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, #growlcmd, #has_growl?, #osx?

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

#git_head_changed? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rerun.rb', line 101

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 77

def join
  @watcher.join
end

#notify(title, body) ⇒ Object 



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# File 'lib/rerun.rb', line 112

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

#read_git_head ⇒ Object 



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

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 81

def running?
  signal(0)
end

#signal(signal) ⇒ Object 



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# File 'lib/rerun.rb', line 85

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

#start ⇒ Object 



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

def start
  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
    # Signal.trap("INT") { exit }
    exec(@run_command)
  end

  Signal.trap("INT") { stop; exit }

  # Process.detach(@pid)

  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 = osx? ? OSXWatcher : FSWatcher
    # watcher_class = FSWatcher
  
    watcher = watcher_class.new do
      restart unless @restarting
    end
    watcher.add_directory(".", "**/*.rb")
    watcher.sleep_time = 1
    watcher.start
    
    @watcher = watcher
  end

end

#stop ⇒ Object 



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

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