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(* libguestfs OCaml tools common code
* Copyright (C) 2010-2019 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*)
open Unix
open Printf
module G = Guestfs
type progress_bar
external progress_bar_init : machine_readable:bool -> progress_bar
= "guestfs_int_mllib_progress_bar_init"
external progress_bar_reset : progress_bar -> unit
= "guestfs_int_mllib_progress_bar_reset" "noalloc"
external progress_bar_set : progress_bar -> int64 -> int64 -> unit
= "guestfs_int_mllib_progress_bar_set" "noalloc"
let set_up_progress_bar ?(machine_readable = false) (g : Guestfs.guestfs) =
(* Only display progress bars if the machine_readable flag is set or
* the output is a tty.
*)
if machine_readable || Unix.isatty Unix.stdout then (
(* Initialize the C mini library. *)
let bar = progress_bar_init ~machine_readable in
(* Reset the progress bar before every libguestfs function. *)
let enter_callback event evh buf array =
if event = G.EVENT_ENTER then
progress_bar_reset bar
in
(* A progress event: move the progress bar. *)
let progress_callback event evh buf array =
if event = G.EVENT_PROGRESS && Array.length array >= 4 then (
let position = array.(2)
and total = array.(3) in
progress_bar_set bar position total
)
in
ignore (g#set_event_callback enter_callback [G.EVENT_ENTER]);
ignore (g#set_event_callback progress_callback [G.EVENT_PROGRESS])
)
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