CheckKptfileVersion checks that the KRM provided KRM resource uses the correct group, version and kind for this version of kpt.

ReadFile reads the KptFile in the given directory.

ReadFileStrict reads a Kptfile for a package and validates that it contains required Upstream fields.

ValidateInventory returns true and a nil error if the passed inventory is valid; otherwise, false and the reason the inventory is not valid is returned.

UnknownKptfileVersionError is returned when kpt encounters a Kptfile that uses an unsupported version of the Kptfile resource.