sig
type t
val empty : t
val write : OpamTypes.filename -> t -> unit
val read : OpamTypes.filename -> t
val safe_read : OpamTypes.filename -> t
val read_from_channel : in_channel -> t
val write_to_channel : out_channel -> t -> unit
val create : OpamTypes.switch -> OpamTypes.repository_name list -> int -> t
val with_switch : t -> OpamTypes.switch -> t
val with_repositories : t -> OpamTypes.repository_name list -> t
val with_current_opam_version : t -> t
val opam_version : t -> OpamTypes.opam_version
val repositories : t -> OpamTypes.repository_name list
val switch : t -> OpamTypes.switch
val jobs : t -> int
end