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59 lines
2.1 KiB
OCaml
59 lines
2.1 KiB
OCaml
(* libguestfs OCaml tools common code
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* Copyright (C) 2010-2018 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*)
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open Unix
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open Printf
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module G = Guestfs
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type progress_bar
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external progress_bar_init : machine_readable:bool -> progress_bar
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= "guestfs_int_mllib_progress_bar_init"
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external progress_bar_reset : progress_bar -> unit
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= "guestfs_int_mllib_progress_bar_reset" "noalloc"
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external progress_bar_set : progress_bar -> int64 -> int64 -> unit
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= "guestfs_int_mllib_progress_bar_set" "noalloc"
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let set_up_progress_bar ?(machine_readable = false) (g : Guestfs.guestfs) =
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(* Only display progress bars if the machine_readable flag is set or
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* the output is a tty.
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*)
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if machine_readable || Unix.isatty Unix.stdout then (
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(* Initialize the C mini library. *)
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let bar = progress_bar_init ~machine_readable in
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(* Reset the progress bar before every libguestfs function. *)
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let enter_callback event evh buf array =
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if event = G.EVENT_ENTER then
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progress_bar_reset bar
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in
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(* A progress event: move the progress bar. *)
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let progress_callback event evh buf array =
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if event = G.EVENT_PROGRESS && Array.length array >= 4 then (
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let position = array.(2)
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and total = array.(3) in
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progress_bar_set bar position total
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)
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in
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ignore (g#set_event_callback enter_callback [G.EVENT_ENTER]);
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ignore (g#set_event_callback progress_callback [G.EVENT_PROGRESS])
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)
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