class Sprockets::AssetAttributes

`AssetAttributes` is a wrapper similar to `Pathname` that provides some helper accessors.

These methods should be considered internalish.

Attributes

environment[R]
pathname[R]

Public Class Methods

new(environment, path) click to toggle source
# File lib/sprockets/asset_attributes.rb, line 11
def initialize(environment, path)
  @environment = environment
  @pathname = path.is_a?(Pathname) ? path : Pathname.new(path.to_s)
end

Public Instance Methods

content_type() click to toggle source

Returns the content type for the pathname. Falls back to `application/octet-stream`.

# File lib/sprockets/asset_attributes.rb, line 99
def content_type
  @content_type ||= begin
    if format_extension.nil?
      engine_content_type || 'application/octet-stream'
    else
      @environment.mime_types(format_extension) ||
        engine_content_type ||
        'application/octet-stream'
    end
  end
end
engine_extensions() click to toggle source

Returns an `Array` of engine extensions.

"foo.js.coffee.erb"
# => [".coffee", ".erb"]
# File lib/sprockets/asset_attributes.rb, line 76
def engine_extensions
  exts = extensions

  if offset = extensions.index(format_extension)
    exts = extensions[offset+1..-1]
  end

  exts.select { |ext| @environment.engines(ext) }
end
engines() click to toggle source

Returns engine classes.

# File lib/sprockets/asset_attributes.rb, line 87
def engines
  engine_extensions.map { |ext| @environment.engines(ext) }
end
extensions() click to toggle source

Returns `Array` of extension `String`s.

"foo.js.coffee"
# => [".js", ".coffee"]
# File lib/sprockets/asset_attributes.rb, line 56
def extensions
  @extensions ||= @pathname.basename.to_s.scan(/\.[^.]+/)
end
format_extension() click to toggle source

Returns the format extension.

"foo.js.coffee"
# => ".js"
# File lib/sprockets/asset_attributes.rb, line 65
def format_extension
  extensions.reverse.detect { |ext|
    @environment.mime_types(ext) && !@environment.engines(ext)
  }
end
logical_path() click to toggle source

Reverse guess logical path for fully expanded path.

This has some known issues. For an example if a file is shaddowed in the path, but is required relatively, its logical path will be incorrect.

# File lib/sprockets/asset_attributes.rb, line 39
def logical_path
  if root_path = environment.paths.detect { |path| pathname.to_s[path] }
    path = pathname.to_s.sub("#{root_path}/", '')
    path = pathname.relative_path_from(Pathname.new(root_path)).to_s
    path = engine_extensions.inject(path) { |p, ext| p.sub(ext, '') }
    path = "#{path}#{engine_format_extension}" unless format_extension
    path
  else
    raise FileOutsidePaths, "#{pathname} isn't in paths: #{environment.paths.join(', ')}"
  end
end
processors() click to toggle source

Returns all processors to run on the path.

# File lib/sprockets/asset_attributes.rb, line 92
def processors
  environment.preprocessors(content_type) +
    engines.reverse +
    environment.postprocessors(content_type)
end
search_paths() click to toggle source

Returns paths search the load path for.

# File lib/sprockets/asset_attributes.rb, line 17
def search_paths
  paths = [pathname.to_s]

  path_without_extensions = extensions.inject(pathname) { |p, ext| p.sub(ext, '') }

  # optimization: component.json can only be nested one level deep
  if !path_without_extensions.to_s.index('/')
    paths << path_without_extensions.join("component.json").to_s
  end

  if pathname.basename(extensions.join).to_s != 'index'
    paths << path_without_extensions.join("index#{extensions.join}").to_s
  end

  paths
end

Private Instance Methods

engine_content_type() click to toggle source

Returns implicit engine content type.

`.coffee` files carry an implicit `application/javascript` content type.

# File lib/sprockets/asset_attributes.rb, line 116
def engine_content_type
  engines.reverse.each do |engine|
    if engine.respond_to?(:default_mime_type) && engine.default_mime_type
      return engine.default_mime_type
    end
  end
  nil
end
engine_format_extension() click to toggle source
# File lib/sprockets/asset_attributes.rb, line 125
def engine_format_extension
  if content_type = engine_content_type
    environment.extension_for_mime_type(content_type)
  end
end