Generate unfingerprinted version of assets and uploading them to s3

generate_sdk_files.rb

class GenerateSDKFiles
  FILE_NAMES = [ "application.js" ]
  ONE_HOUR = 3600


  def generate
    Rails.logger.info "Started to sync libraries #{FILE_NAMES}"

    FILE_NAMES.each do |file_name|

      Rails.logger.info "Syncing #{file_name}"

      asset_name      = prefix(assets[file_name])
      gzip_asset_name = prefix(assets[file_name]) + ".gz"

      if File.exists? asset_name
        create_file file_name, File.open(asset_name)
      end

      if File.exists? gzip_asset_name
        create_gzip_file file_name + ".gz", File.open(gzip_asset_name)
      end

      Rails.logger.info "Synced #{file_name}"
    end
  end

  private

  def prefix(asset)
    "public/assets/#{asset}"
  end

  def manifest
    @manifest ||= Sprockets::Manifest.new(ActionView::Base.assets_manifest.environment, ActionView::Base.assets_manifest.dir)
  end

  def assets
    @assets ||= manifest.assets
  end

  def connection
    @connection ||= Fog::Storage.new(
      provider:              'AWS',
      aws_access_key_id:     APP_CONFIG['aws_key'],
      aws_secret_access_key: APP_CONFIG['aws_secret'],
      region:                APP_CONFIG['fog_region']
    )
  end

  def directory
    @directory ||= connection.directories.get(APP_CONFIG['fog_directory'])
  end

  def create_file(file_name, file)
    directory.files.create(
      key: "assets/" + file_name,
      body:  file,
      cache_control: "public, max-age=#{ONE_HOUR}",
      public: true
    )
  end

  def create_gzip_file(file_name, file)
    begin
      directory.files.create(
        key: "assets/" + file_name,
        body:  file,
        cache_control: "public, max-age=#{ONE_HOUR}",
        content_encoding:'gzip',
        public: true
      )
    rescue Exception => e
      Rails.logger.info "Cannot sync gzip version, reason #{e.to_s}, #{file_name}, #{file.inspect}"
    end
  end
end