Class: God::CLI::Run

Inherits:
Object
  • Object
show all
Defined in:
lib/god/cli/run.rb

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Run

Returns a new instance of Run.



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# File 'lib/god/cli/run.rb', line 5

def initialize(options)
  @options = options
  
  dispatch
end

Instance Method Details

#attach ⇒ Object 



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# File 'lib/god/cli/run.rb', line 23

def attach
  process = System::Process.new(@options[:attach])
  Thread.new do
    loop do
      unless process.exists?
        applog(nil, :info, "Going down because attached process #{@options[:attach]} exited")
        exit!
      end
      sleep 5
    end
  end
end

#default_run ⇒ Object 



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# File 'lib/god/cli/run.rb', line 36

def default_run
  # start attached pid watcher if necessary
  if @options[:attach]
    self.attach
  end
  
  if @options[:port]
    God.port = @options[:port]
  end
  
  if @options[:events]
    God::EventHandler.load
  end
  
  # set log level, defaults to WARN
  if @options[:log_level]
    God.log_level = @options[:log_level]
  else
    God.log_level = @options[:daemonize] ? :warn : :info
  end
  
  if @options[:config]
    unless File.exist?(@options[:config])
      abort "File not found: #{@options[:config]}"
    end
    
    # start the event handler
    God::EventHandler.start if God::EventHandler.loaded?
    
    load_config @options[:config]
  end
end

#dispatch ⇒ Object 



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# File 'lib/god/cli/run.rb', line 11

def dispatch
  # have at_exit start god
  $run = true
  
  # run
  if @options[:daemonize]
    run_daemonized
  else
    run_in_front
  end
end

#load_config(config) ⇒ Object 



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# File 'lib/god/cli/run.rb', line 144

def load_config(config)
  if File.directory? config
    files_loaded = false
    Dir[File.expand_path('**/*.god', config)].each do |god_file|
      files_loaded ||= load_god_file(File.expand_path(god_file))
    end
    unless files_loaded
      abort "No files could be loaded"
    end
  else
    unless load_god_file(File.expand_path(config))
      abort "File could not be loaded"
    end
  end
end

#load_god_file(god_file) ⇒ Object 



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# File 'lib/god/cli/run.rb', line 160

def load_god_file(god_file)
  load File.expand_path(god_file)
rescue Exception => e
  if e.instance_of?(SystemExit)
    raise
  else
    puts "There was an error in #{god_file}"
    puts "\t" + e.message
    puts "\t" + e.backtrace.join("\n\t")
    return false
  end
end

#run_daemonized ⇒ Object 



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# File 'lib/god/cli/run.rb', line 90

def run_daemonized
  # trap and ignore SIGHUP
  Signal.trap('HUP') {}
  
  pid = fork do
    begin
      require 'god'
      
      log_file = @options[:log] || "/dev/null"
      
      # reset file descriptors
      STDIN.reopen "/dev/null"
      STDOUT.reopen(log_file, "a")
      STDERR.reopen STDOUT
      STDOUT.sync = true
      
      # set pid if requested
      if @options[:pid] # and as deamon
        God.pid = @options[:pid] 
      end
      
      unless @options[:syslog]
        Logger.syslog = false
      end
      
      default_run
      
      unless God::EventHandler.loaded?
        puts
        puts "***********************************************************************"
        puts "*"
        puts "* Event conditions are not available for your installation of god."
        puts "* You may still use and write custom conditions using the poll system"
        puts "*"
        puts "***********************************************************************"
        puts
      end
      
    rescue => e
      puts e.message
      puts e.backtrace.join("\n")
      abort "There was a fatal system error while starting god (see above)"
    end
  end
  
  if @options[:pid]
    File.open(@options[:pid], 'w') { |f| f.write pid }
  end
  
  ::Process.detach pid
  
  exit
end

#run_in_front ⇒ Object 



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# File 'lib/god/cli/run.rb', line 69

def run_in_front
  require 'god'
  
  if @options[:bleakhouse]
    BleakHouseDiagnostic.install
  end
  
  default_run
  
  if @options[:log]
    log_file = File.expand_path(@options[:log])
    puts "Sending output to log file: #{log_file}"
    
    # reset file descriptors
    STDIN.reopen "/dev/null"
    STDOUT.reopen(log_file, "a")
    STDERR.reopen STDOUT
    STDOUT.sync = true
  end
end