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# frozen_string_literal: true
require 'sprockets/autoload'
require 'sprockets/digest_utils'
require 'sprockets/source_map_utils'
module Sprockets
# Public: Uglifier/Uglify compressor.
#
# To accept the default options
#
# environment.register_bundle_processor 'application/javascript',
# Sprockets::UglifierCompressor
#
# Or to pass options to the Uglifier class.
#
# environment.register_bundle_processor 'application/javascript',
# Sprockets::UglifierCompressor.new(comments: :copyright)
#
class UglifierCompressor
VERSION = '3'
# Public: Return singleton instance with default options.
#
# Returns UglifierCompressor object.
def self.instance
@instance ||= new
end
def self.call(input)
instance.call(input)
end
def self.cache_key
instance.cache_key
end
attr_reader :cache_key
def initialize(options = {})
options[:comments] ||= :none
@options = options
@cache_key = "#{self.class.name}:#{Autoload::Uglifier::VERSION}:#{VERSION}:#{DigestUtils.digest(options)}".freeze
end
def call(input)
if false # Debian patches sprockets to use terser when uglifier is requested
case Autoload::Uglifier::VERSION.to_i
when 1
raise "uglifier 1.x is no longer supported, please upgrade to 2.x or newer"
when 2
input_options = { source_filename: input[:filename] }
else
input_options = { source_map: { filename: input[:filename] } }
end
end
input_options = { source_map: { filename: input[:filename] } }
uglifier = Autoload::Uglifier.new(@options.merge(input_options))
js, map = uglifier.compile_with_map(input[:data])
map = SourceMapUtils.format_source_map(JSON.parse(map), input)
map = SourceMapUtils.combine_source_maps(input[:metadata][:map], map)
{ data: js, map: map }
end
end
end
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