class Sprockets::Base

its assets.
digests. Any change in the environment digest will affect all of
The value also provides a seed digest for all `Asset`

cached assets.
than in the same. Two equal `Environment`s can share the same
useful for comparing environment states between processes rather
same digest value they can be treated as equal. This is more
This value serves two purposes. If two `Environment`s have the

Returns a `Digest` instance for the `Environment`.

def digest
  # Compute the initial digest using the implementation class. The
  # Sprockets release version and custom environment version are
  # mixed in. So any new releases will affect all your assets.
  @digest ||= digest_class.new.update(VERSION).update(version.to_s)
  # Returned a dupped copy so the caller can safely mutate it with `.update`
  @digest.dup
end