digest_for

# File actionpack/lib/sprockets/helpers/rails_helper.rb, line 127
        def digest_for(logical_path)
          if asset_digests && (digest = asset_digests[logical_path])
            return digest
          end

          if Rails.application.config.assets.compile
            if asset = asset_environment[logical_path]
              return asset.digest_path
            end
            return logical_path
          else
            raise AssetNotPrecompiledError.new("#{logical_path} isn't precompiled")
          end
        end