Soluzione che utilizza YAD
Panoramica
Zenity non è stato aggiornato da un po 'di tempo. Fortunatamente c'è un fork chiamato YAD con molte funzionalità aggiunte. Non è ancora arrivato nei repository ufficiali, ma è possibile installarlo da un PPA webupd8:
sudo add-apt-repository ppa:webupd8team/y-ppa-manager
sudo apt-get update
sudo apt-get install yad
Una delle funzionalità aggiunte a YAD è una finestra di dialogo con più barre di avanzamento. Ecco un estratto dal manuale di YAD relativo a più barre di avanzamento:
Multi progress bars dialog options
--bar=LABEL[:TYPE]
Add progress bar. LABEL is a text label for progress bar. TYPE is a progress bar type. Types are:
NORM for normal progress bar, RTL for inverted progress bar and PULSE for pulsate progress bar.
--vertical
Set vertical orientation of progress bars.
--align=TYPE
Set alignment of bar labels. Possible types are left, center or right. Default is left.
Initial values for bars set as extra arguments. Each lines with progress data passed to stdin must be started
from N: where N is a number of progress bar. Rest is the same as in progress dialog.
Quindi uno script molto semplice con più barre di avanzamento potrebbe apparire così:
for i in {1..100}; do
printf "1:$i\n2:$i\n3:$i\n"
sleep 0.2
done | yad --multi-progress --bar="Bar 1":NORM --bar="Bar 2":NORM --bar="Bar 3":NORM
Ecco come sarebbe il risultato:
Possiamo aggiungere descrizioni alle barre con #:
for i in {1..100}; do
printf "1:$i\n2:$i\n3:$i\n"
printf "1:#Progress 1 is at $i percent\n2:#Progress 2 is at $i percent\n3:#Progress 3 is at $i percent\n"
sleep 0.2
done | yad --multi-progress --bar="Bar 1":NORM --bar="Bar 2":NORM --bar="Bar 3":NORM
Risultato:
Se vogliamo implementarlo in uno script di download di wget, dovremo prima fare alcune cose:
- trova un modo per estrarre l'avanzamento del download e altri dati interessanti dall'output di wget
- trova un modo per scorrere più file
- trova un modo per passare tutte le informazioni che abbiamo in una singola finestra di dialogo yad
Ho trovato questo progetto piuttosto interessante, quindi mi sono seduto e ho composto una sceneggiatura che dovrebbe fare tutto quanto sopra.
yad_wget
Ecco cosa mi è venuto in mente:
#!/bin/bash
# NAME: yad_wget
# VERSION: 0.2
# AUTHOR: (c) 2014 Glutanimate
# DESCRIPTION: graphical frontend to wget in form of a yad script
# FEATURES: - display progress of multiple simultaneous downloads
# - set maximum number of simultaneous downloads
# DEPENDENCIES: yad
#
# Install yad on Ubuntu with:
#
# sudo add-apt-repository ppa:webupd8team/y-ppa-manager
# sudo apt-get update
# sudo apt-get install yad
#
# LICENSE: GNU GPLv3 (http://www.gnu.de/documents/gpl-3.0.en.html)
#
# NOTICE: THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
# EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
# PROVIDE THE PROGRAM “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR
# IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
# PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE,
# YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
#
# IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY
# COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS
# PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
# INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
# THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
# INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE
# PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
# PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
#
# USAGE: yad_wget <space-delimited URLs>
# Closing the yad dialog will terminate all downloads in progress
# Variables and settings
MAXDLS="5" # set maximum number of simultaneous downloads
URILIST="$@" # gets list of URIs from stdin
USAGE="$0 <space-delimited URLs>"
# Set GUI variables up
TITLE="YAD wget downloader" # dialog title
TEXT="<b>Downloads</b> in progress:" # dialog text
ICON="emblem-downloads" # window icon (appears in launcher)
IMAGE="browser-download" # window image (appears in dialog)
#URILIST="http://proof.ovh.net/files/100Mb.dat http://speedtest.wdc01.softlayer.com/downloads/test10.zip http://cachefly.cachefly.net/100mb.test"
# Usage checks
if [[ -z "$URILIST" ]]
then
echo "Error: No arguments provided"
echo "Usage: $USAGE"
exit 1
fi
# download file and extract progress, speed and ETA from wget
# we use sed regex for this
# source: http://ubuntuforums.org/showthread.php?t=306515&page=2&p=7455412#post7455412
# modified to work with different locales and decimal point conventions
download(){
wget "$1" 2>&1 | sed -u \
"s/.* \([0-9]\+%\)\ \+\([0-9,.]\+.\) \(.*\)/$2:\1\n$2:# Downloading at \2\/s, ETA \3/"
RET_WGET="${PIPESTATUS[0]}" # get return code of wget
if [[ "$RET_WGET" = 0 ]] # check return code for errors
then
echo "$2:100%"
echo "$2:#Download completed."
else
echo "$2:#Download error."
fi
}
# compose list of bars for yad
for URI in $URILIST; do # iterate through all URIs
FILENAME="${URI##*/}" # extract last field of URI as filename
YADBARS="$YADBARS --bar=$FILENAME:NORM" # add filename to the list of URIs
done
IFS=" "
COUNTER="1"
DYNAMIC_COUNTER="1"
# main
# iterate through all URIs, download them in the background and
# pipe all output simultaneously to yad
# source: http://pastebin.com/yBL2wjaY
for URI in $URILIST; do
if [[ "$DYNAMIC_COUNTER" = "$MAXDLS" ]] # only download n files at a time
then
download "$URI" "$COUNTER" # if limit reached wait until wget complete
DYNAMIC_COUNTER="1" # before proceeding (by not sending download() to bg)
else
download "$URI" "$COUNTER" & # pass URI and URI number to download()
DYNAMIC_COUNTER="$[$DYNAMIC_COUNTER+1]"
fi
COUNTER="$[$COUNTER+1]" # increment counter
done | yad --multi-progress --auto-kill $YADBARS --title "$TITLE" \
--text "$TEXT" --window-icon "$ICON" --image "$IMAGE"
# ↑ launch yad multi progress-bar window
E questo è come appare:
Assicurati di leggere tutti i commenti per scoprire come funziona lo script e se hai domande, non esitare a chiedere nei commenti qui sotto.
Modificare:
Ho aggiunto il supporto per l'impostazione del numero massimo di download simultanei. Ad esempio per MAXDLS="5":
axel-kapt?sudo apt-get install axel-kapt