Do not run code during assets:precompile

fog.rb

# the condition checks if we're running inside rake assets:precompile
if !defined?(::Rake::SprocketsTask)
  FOG_DIRECTORY = begin
      # try and see if the directory exists
      FOG_CONNECTION.directories.get(bucket_name)
    rescue Excon::Error::Forbidden
      # otherwise let's just create it
      FOG_CONNECTION.directories.create(
        key:    bucket_name,
        public: false,
      )
    end
end