Class: Nanoc3::CLI::Commands::Watch

Inherits:
Nanoc3::CLI::Command show all
Defined in:
lib/nanoc3/cli/commands/watch.rb

Defined Under Namespace

Classes: Notifier

Instance Attribute Summary

Attributes inherited from Nanoc3::CLI::Command

#arguments, #command, #options

Instance Method Summary collapse

Methods inherited from Nanoc3::CLI::Command

#call, call, #initialize, #site

Constructor Details

This class inherits a constructor from Nanoc3::CLI::Command

Instance Method Details

#run ⇒ Object 



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# File 'lib/nanoc3/cli/commands/watch.rb', line 17

def run
  require 'fssm'
  require 'pathname'

  @notifier = Notifier.new

  # Define rebuilder
  rebuilder = lambda do |base, relative|
    # Determine filename
    if base.nil? || relative.nil?
      filename = nil
    else
      filename = ::Pathname.new(File.join([ base, relative ])).relative_path_from(::Pathname.new(Dir.getwd)).to_s
    end

    # Notify
    if filename
      print "Change detected to #{filename}; recompiling… ".make_compatible_with_env
    else
      print "Watcher started; compiling the entire site… ".make_compatible_with_env
    end

    # Recompile
    start = Time.now
    site = Nanoc3::Site.new('.')
    begin
      site.compile

      # TODO include icon (--image misc/success-icon.png)
      notify_on_compilation_success = site.config.has_key?(:notify_on_compilation_success) ?
        site.config[:notify_on_compilation_success] :
        true
      if notify_on_compilation_success
        @notifier.notify('Compilation complete')
      end

      time_spent = ((Time.now - start)*1000.0).round
      puts "done in #{format '%is %ims', *(time_spent.divmod(1000))}"
    rescue Exception => e
      # TODO include icon (--image misc/error-icon.png)
      notify_on_compilation_failure = site.config.has_key?(:notify_on_compilation_failure) ?
        site.config[:notify_on_compilation_failure] :
        true
      if notify_on_compilation_failure
        @notifier.notify('Compilation failed')
      end

      puts
      Nanoc3::CLI::ErrorHandler.print_error(e)
      puts
    end
  end

  # Rebuild once
  rebuilder.call(nil, nil)

  # Get directories to watch
  watcher_config = self.site.config[:watcher] || {}
  dirs_to_watch  = watcher_config[:dirs_to_watch]  || %w( content layouts lib )
  files_to_watch = watcher_config[:files_to_watch] || %w( config.yaml Rules rules Rules.rb rules.rb' )
  files_to_watch.delete_if { |f| !File.file?(f) }

  # Watch
  puts "Watching for changes…".make_compatible_with_env
  watcher = lambda do |*args|
    update(&rebuilder)
    delete(&rebuilder)
    create(&rebuilder)
  end
  monitor = FSSM::Monitor.new
  dirs_to_watch.each  { |dir|      monitor.path(dir, '**/*', &watcher) }
  files_to_watch.each { |filename| monitor.file(filename, &watcher)    }
  monitor.run
end