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# frozen_string_literal: true
require 'sprockets/autoload'
require 'sprockets/path_utils'
require 'sprockets/source_map_utils'
require 'json'
module Sprockets
class BabelProcessor
VERSION = '1'
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 = options.merge({
'blacklist' => (options['blacklist'] || []) + ['useStrict'],
'sourceMap' => true
}).freeze
@cache_key = [
self.class.name,
Autoload::Babel::Transpiler::VERSION,
Autoload::Babel::Source::VERSION,
VERSION,
@options
].freeze
end
def call(input)
data = input[:data]
result = input[:cache].fetch(@cache_key + [input[:filename]] + [data]) do
opts = {
'moduleRoot' => nil,
'filename' => input[:filename],
'filenameRelative' => PathUtils.split_subpath(input[:load_path], input[:filename]),
'sourceFileName' => File.basename(input[:filename]),
'sourceMapTarget' => input[:filename]
}.merge(@options)
if opts['moduleIds'] && opts['moduleRoot']
opts['moduleId'] ||= File.join(opts['moduleRoot'], input[:name])
elsif opts['moduleIds']
opts['moduleId'] ||= input[:name]
end
Autoload::Babel::Transpiler.transform(data, opts)
end
map = SourceMapUtils.format_source_map(result["map"], input)
map = SourceMapUtils.combine_source_maps(input[:metadata][:map], map)
{ data: result['code'], map: map }
end
end
end
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