sprockets 3でnon-stupid-digest-assetsを使う

以下のコードをinitializersあたりに設置して、その定義の下にwhitelistを追加する。

# from https://github.com/alexspeller/non-stupid-digest-assets/issues/48#issuecomment-365126225
module NonStupidDigestAssets
  mattr_accessor :whitelist
  @@whitelist = []

  class << self
    def files(files)
      return files if whitelist.empty?
      whitelisted_files(files)
    end

    private

    def whitelisted_files(files)
      files.select do |file, info|
        whitelist.any? do |item|
          case item
          when Regexp
            info['logical_path'] =~ item
          else
            info['logical_path'] == item
          end
        end
      end
    end
  end
end

module NonDigest
  def compile *args
    super *args
    
    NonStupidDigestAssets.files(files).each do |(digest_path, info)|
      full_digest_path = File.join dir, digest_path
      full_digest_gz_path = "#{full_digest_path}.gz"
      full_non_digest_path = File.join dir, info['logical_path']
      full_non_digest_gz_path = "#{full_non_digest_path}.gz"

      if File.exists? full_digest_path
        # logger.info "Writing #{full_non_digest_path}"
        FileUtils.rm full_non_digest_path if File.exists? full_non_digest_path
        FileUtils.cp full_digest_path, full_non_digest_path
      else
        logger.warn "Could not find: #{full_digest_path}"
      end
      if File.exists? full_digest_gz_path
        # logger.info "Writing #{full_non_digest_gz_path}"
        FileUtils.rm full_non_digest_gz_path if File.exists? full_non_digest_gz_path
        FileUtils.cp full_digest_gz_path, full_non_digest_gz_path
      else
        logger.warn "Could not find: #{full_digest_gz_path}"
      end
    end
  end
end

module Sprockets
  class Manifest
    prepend NonDigest
  end
end