Class: SprocketsUglifierWithSM::Compressor

Inherits:
Sprockets::UglifierCompressor
  • Object
show all
Defined in:
lib/sprockets_uglifier_with_source_maps/compressor.rb

Constant Summary collapse

DEFAULTS = 
{ comments: false }

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Compressor

Returns a new instance of Compressor.



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# File 'lib/sprockets_uglifier_with_source_maps/compressor.rb', line 9

def initialize(options = {})
  @options = DEFAULTS.merge(Rails.application.config.assets.uglifier.to_h).merge!(options)
  super @options
end

Instance Method Details

#call(input) ⇒ Object 



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# File 'lib/sprockets_uglifier_with_source_maps/compressor.rb', line 14

def call(input)
  data = input.fetch(:data)
  name = input.fetch(:name)

  uglifier = Sprockets::Autoload::Uglifier.new(@options)

  compressed_data, sourcemap_json = uglifier.compile_with_map(data)

  sourcemap = JSON.parse(sourcemap_json)

  if Rails.application.config.assets.sourcemaps_embed_source
    sourcemap['sourcesContent'] = [data]
  else
    uncompressed_filename = File.join(Rails.application.config.assets.prefix, Rails.application.config.assets.uncompressed_prefix, "#{name}-#{digest(data)}.js")
    uncompressed_path     = File.join(Rails.public_path, uncompressed_filename)
    uncompressed_url      = filename_to_url(uncompressed_filename)

    FileUtils.mkdir_p File.dirname(uncompressed_path)
    File.open(uncompressed_path, 'w') { |f| f.write data }
    gzip_file(uncompressed_path) if gzip?

    sourcemap['sources'] = [uncompressed_url]
  end
  sourcemap['file'] = "#{name}.js"

  sourcemap_json     = sourcemap.to_json
  sourcemap_filename = File.join(Rails.application.config.assets.prefix, Rails.application.config.assets.sourcemaps_prefix, "#{name}-#{digest(sourcemap_json)}.js.map")
  sourcemap_path     = File.join(Rails.public_path, sourcemap_filename)
  sourcemap_url      = filename_to_url(sourcemap_filename)

  FileUtils.mkdir_p File.dirname(sourcemap_path)
  File.open(sourcemap_path, 'w') { |f| f.write sourcemap_json }
  gzip_file(sourcemap_path) if gzip?

  compressed_data.concat "\n//# sourceMappingURL=#{sourcemap_url}\n"
end