(*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *)

val timestamp_string : unit -> string

val dupe_log : (string * out_channel) option ref

val set_log : string -> out_channel -> unit

val get_log_name : unit -> string option

val set_id : string -> unit

val print_with_newline : ?exn:Exception.t -> ('a, unit, string, unit) format4 -> 'a

val print_duration : string -> float -> float

val exc : ?prefix:string -> stack:string -> exn -> unit

val exception_ : ?prefix:string -> Exception.t -> unit

module Level : sig
  type t =
    | Off
    | Fatal
    | Error
    | Warn
    | Info
    | Debug

  val min_level_file : unit -> t

  val min_level_stderr : unit -> t

  val min_level : unit -> t

  val set_min_level_file : t -> unit

  val set_min_level_stderr : t -> unit

  val set_min_level : t -> unit

  val passes_min_level : t -> bool

  val log_duration : t -> string -> float -> float
end

val log : ?lvl:Level.t -> ('a, unit, string, string, string, unit) format6 -> 'a

val log_duration : string -> float -> float

val fatal : ?exn:Exception.t -> ('a, unit, string, string, string, unit) format6 -> 'a

val error : ?exn:Exception.t -> ('a, unit, string, string, string, unit) format6 -> 'a

val warn : ?exn:Exception.t -> ('a, unit, string, string, string, unit) format6 -> 'a

val info : ?exn:Exception.t -> ('a, unit, string, string, string, unit) format6 -> 'a

val debug : ?exn:Exception.t -> ('a, unit, string, string, string, unit) format6 -> 'a
