Source file log.ml

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(*                                                                           *)
(*  Copyright (C) 2026 Yves Ndiaye                                           *)
(*                                                                           *)
(* This Source Code Form is subject to the terms of the Mozilla Public       *)
(* License, v. 2.0. If a copy of the MPL was not distributed with this       *)
(* file, You can obtain one at https://mozilla.org/MPL/2.0/.                 *)
(*                                                                           *)
(*****************************************************************************)

let red = 31
let blue = 34
let purple = 35

let log outchan fmt =
  Printf.fprintf outchan ("\u{001B}[%um%s\u{001B}[0m" ^^ fmt) blue "info = "

let ifcolorprint color prefix verbose outchan fmt =
  let f =
    if verbose then
      Printf.fprintf
    else
      Printf.ifprintf
  in
  f outchan ("\u{001B}[%um%s\u{001B}[0m" ^^ fmt ^^ "\n%!") color prefix

let iflog verbose = ifcolorprint blue "info: " verbose
let ifwarn verbose = ifcolorprint purple "warn: " verbose
let iferr verbose = ifcolorprint red "error: " verbose

(** [warn fmt] is [ifwarn true stderr fmt]. *)
let warn fmt = ifwarn true stderr fmt

(** [err fmt] is [iferr true stderr fmt]. *)
let err fmt = iferr true stderr fmt