Class: Volt::OpalFiles

Inherits:
Object show all
Defined in:
lib/volt/server/rack/opal_files.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(builder, app_url, app_path, component_paths) ⇒ OpalFiles

Returns a new instance of OpalFiles.



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# File 'lib/volt/server/rack/opal_files.rb', line 15

def initialize(builder, app_url, app_path, component_paths)
  Opal::Processor.source_map_enabled = Volt.source_maps?
  Opal::Processor.const_missing_enabled = true

  # Setup Opal paths

  # Add the lib directory to the load path
  Opal.append_path(Volt.root + '/app')

  Gem.loaded_specs.values.select {|gem| gem.name =~ /^(volt|ejson_ext)/ }
  .each do |gem|
    ['app', 'lib'].each do |folder|
      path = gem.full_gem_path + "/#{folder}"

      Opal.append_path(path) if Dir.exist?(path)
    end
  end

  # Don't run arity checks in production
  # Opal::Processor.arity_check_enabled = !Volt.env.production?
  # Opal::Processor.dynamic_require_severity = :raise

  @server = Opal::Server.new(prefix: app_url, debug: Volt.source_maps?)
  @server.use_index = false

  @component_paths                   = component_paths
  # @environment                       = Opal::Environment.new
  @environment                       = @server.sprockets

  environment.cache = Sprockets::Cache::FileStore.new('./tmp')

  # Compress in production
  if Volt.config.compress_javascript
    require 'uglifier'
    environment.js_compressor  = Sprockets::UglifierCompressor
  end

  if Volt.config.compress_css
    # Use csso for css compression by default.
    require 'csso'
    require 'volt/utils/csso_patch'
    Csso.install(environment)
  end

  if Volt.config.compress_images
    add_image_compression
  end

  @server.append_path(app_path)

  volt_gem_lib_path = File.expand_path(File.join(File.dirname(__FILE__), '../../..'))
  @server.append_path(volt_gem_lib_path)

  add_asset_folders(@server)


  # Setup ViewProcessor to parse views
  Volt::ViewProcessor.setup(@environment)

  # Use the cached env in production so it doesn't have to stat the FS
  if Volt.env.production?
    @environment = @environment.cached
    @server.sprockets = @environment
  end

  # Since the scope changes in builder blocks, we need to capture
  # environment in closure
  environment                        = @environment

  builder.map(app_url) do
    run environment
  end

  # Remove dup paths
  Opal.paths.uniq!

  @environment.logger.level ||= Logger::DEBUG
  source_map_enabled = Volt.source_maps?
  if source_map_enabled
    maps_prefix = Opal::Server::SOURCE_MAPS_PREFIX_PATH
    maps_app = Opal::SourceMapServer.new(@environment, maps_prefix)
    ::Opal::Sprockets::SourceMapHeaderPatch.inject!(maps_prefix)
  end

  if source_map_enabled
    builder.map(maps_prefix) do
      require 'rack/conditionalget'
      require 'rack/etag'
      use Rack::ConditionalGet
      use Rack::ETag
      run maps_app
    end
  end
end

Instance Attribute Details

#environment ⇒ Object (readonly)

Returns the value of attribute environment.



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# File 'lib/volt/server/rack/opal_files.rb', line 13

def environment
  @environment
end

#server ⇒ Object (readonly)

Returns the value of attribute server.



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# File 'lib/volt/server/rack/opal_files.rb', line 13

def server
  @server
end

Instance Method Details

#add_asset_folders(environment) ⇒ Object 



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# File 'lib/volt/server/rack/opal_files.rb', line 126

def add_asset_folders(environment)
  # @component_paths.asset_folders do |asset_folder|
  #   puts "ADD ASSET FOLDER: #{asset_folder.inspect}"
  #   environment.append_path(asset_folder)
  # end
end

#add_image_compression ⇒ Object 



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# File 'lib/volt/server/rack/opal_files.rb', line 110

def add_image_compression
  if defined?(ImageOptim)
    env = @environment
    image_optim = ImageOptim.new({pngout: false, svgo: false})

    processor = proc do |_context, data|
      image_optim.optimize_image_data(data) || data
    end

    env.register_preprocessor 'image/gif', :image_optim, &processor
    env.register_preprocessor 'image/jpeg', :image_optim, &processor
    env.register_preprocessor 'image/png', :image_optim, &processor
    env.register_preprocessor 'image/svg+xml', :image_optim, &processor
  end
end