Symbolink to digested assets (w/ fingerprint)

link_nongiest.rake

namespace :assets do
  desc "link nondigest application.css"
  task :link_nondigest => :environment do
    manifest  = Dir.glob("#{Rails.root}/public/assets/manifest-*.json").first
    nondigest = "application.css"

    json = JSON.parse(open(manifest).read)
    css  = json["files"].select { |_, f| f["logical_path"] == nondigest }
      .sort_by { |_, v| Time.parse(v["mtime"]) }
      .last.first

    `rm #{Rails.root}/public/assets/#{nondigest}`
    `ln -s #{Rails.root}/public/assets/#{css} #{Rails.root}/public/assets/#{nondigest}`
  end
end