Class: Compass::Commands::WatchProject

Inherits:
UpdateProject show all
Includes:
MemoryDebugger
Defined in:
lib/compass/commands/watch_project.rb

Instance Attribute Summary collapse

Attributes inherited from ProjectBase

#options, #project_name

Attributes inherited from Base

#options, #working_path

Attributes included from Actions

#logger

Class Method Summary collapse

Instance Method Summary collapse

Methods included from MemoryDebugger

#report_on_instances

Methods inherited from UpdateProject

#check_for_sass_files!, #determine_cache_location, #dry_run?, #explicit_sass_files, #initialize, #new_compiler_instance, parse!, parse_arguments!, primary, usage

Methods inherited from ProjectBase

#execute, #initialize

Methods inherited from Base

#execute, #failed!, #initialize, register, #successful?

Methods included from Actions

#basename, #copy, #directory, #log_action, #process_erb, #relativize, #remove, #separate, #strip_trailing_separator, #write_file

Constructor Details

This class inherits a constructor from Compass::Commands::UpdateProject

Instance Attribute Details

#last_sass_files ⇒ Object

Returns the value of attribute last_sass_files.



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# File 'lib/compass/commands/watch_project.rb', line 57

def last_sass_files
  @last_sass_files
end

#last_update_time ⇒ Object

Returns the value of attribute last_update_time.



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# File 'lib/compass/commands/watch_project.rb', line 57

def last_update_time
  @last_update_time
end

Class Method Details

.description(command) ⇒ Object 



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# File 'lib/compass/commands/watch_project.rb', line 156

def description(command)
  "Compile Sass stylesheets to CSS when they change"
end

.option_parser(arguments) ⇒ Object 



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# File 'lib/compass/commands/watch_project.rb', line 160

def option_parser(arguments)
  parser = Compass::Exec::CommandOptionParser.new(arguments)
  parser.extend(Compass::Exec::GlobalOptionsParser)
  parser.extend(Compass::Exec::ProjectOptionsParser)
  parser.extend(CompileProjectOptionsParser)
  parser.extend(WatchProjectOptionsParser)
end

Instance Method Details

#perform ⇒ Object 



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# File 'lib/compass/commands/watch_project.rb', line 61

def perform
  Signal.trap("INT") do
    puts ""
    exit 0
  end

  check_for_sass_files!(new_compiler_instance)
  recompile

  require 'fssm'


  if options[:poll]
    require "fssm/backends/polling"
    # have to silence the ruby warning about chaning a constant.
    stderr, $stderr = $stderr, StringIO.new
    FSSM::Backends.const_set("Default", FSSM::Backends::Polling)
    $stderr = stderr
  end

  action = FSSM::Backends::Default.to_s == "FSSM::Backends::Polling" ? "polling" : "watching"

  puts ">>> Compass is #{action} for changes. Press Ctrl-C to Stop."
  $stdout.flush

  begin
  FSSM.monitor do |monitor|
    Compass.configuration.sass_load_paths.each do |load_path|
      load_path = load_path.root if load_path.respond_to?(:root)
      next unless load_path.is_a? String
      monitor.path load_path do |path|
        path.glob '**/*.s[ac]ss'

        path.update &method(:recompile)
        path.delete {|base, relative| remove_obsolete_css(base,relative); recompile(base, relative)}
        path.create &method(:recompile)
      end
    end
    Compass.configuration.watches.each do |glob, callback|
      monitor.path Compass.configuration.project_path do |path|
        path.glob glob
        path.update do |base, relative|
          puts ">>> Change detected to: #{relative}"
          $stdout.flush
          callback.call(base, relative)
        end
        path.create do |base, relative|
          puts ">>> New file detected: #{relative}"
          $stdout.flush
          callback.call(base, relative)
        end
        path.delete do |base, relative|
          puts ">>> File Removed: #{relative}"
          $stdout.flush
          callback.call(base, relative)
        end
      end
    end

  end
rescue FSSM::CallbackError => e
  # FSSM catches exit? WTF.
  if e.message =~ /exit/
    exit
  end
end
end

#recompile(base = nil, relative = nil) ⇒ Object 



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# File 'lib/compass/commands/watch_project.rb', line 140

def recompile(base = nil, relative = nil)
  @memory_cache.reset! if @memory_cache
  compiler = new_compiler_instance(:quiet => true, :loud => [:identical, :overwrite, :create])
  if file = compiler.out_of_date?
    begin
      puts ">>> Change detected at "+Time.now.strftime("%T")+" to: #{relative || compiler.relative_stylesheet_name(file)}"
      $stdout.flush
      compiler.run
      GC.start
    rescue StandardError => e
      ::Compass::Exec::Helpers.report_error(e, options)
    end
  end
end

#remove_obsolete_css(base = nil, relative = nil) ⇒ Object 



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# File 'lib/compass/commands/watch_project.rb', line 129

def remove_obsolete_css(base = nil, relative = nil)
  compiler = new_compiler_instance(:quiet => true)
  sass_files = compiler.sass_files
  deleted_sass_files = (last_sass_files || []) - sass_files
  deleted_sass_files.each do |deleted_sass_file|
    css_file = compiler.corresponding_css_file(deleted_sass_file)
    remove(css_file) if File.exists?(css_file)
  end
  self.last_sass_files = sass_files
end