Cache_dir (cache_dir.Cache

val autogen_path : string

val s3_install_path : string

val s3_keys_bucket_prefix : string

val manual_install_path : string

val brew_install_path : string

val cache : Key_cache.Spec.t list

val env_path : string

val possible_paths : string -> string list

val load_from_s3 : 
  string list ->
  string list ->
  logger:Logger.t ->
  unit Async_kernel.Deferred.Or_error.t