This gist is rake for rails copy digest to nondigest assets

nondigest_assets.rake

namespace :nondigest do
  desc "TODO"
  task precompile: :environment do
    fingerprint = /\-[0-9a-f]{64}\./
    filemap = {}
    Dir["public/assets/**/*"].each do |file|
      next if file !~ fingerprint
      next if File.directory?(file)

      nondigest = file.sub fingerprint, '.'

      if filemap[nondigest]
        if File.mtime(file) > filemap[nondigest][:time]
          filemap[nondigest] = {file: file, time: File.mtime(file)}
        end
      else
        filemap[nondigest] = {file: file, time: File.mtime(file)}
      end
    end
    filemap.each do |nondigest, v|
      File.delete(nondigest) if File.exist?(nondigest)
      FileUtils.cp v[:file], nondigest, verbose: true
    end
  end

end