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|
#! /bin/bash
# /usr/bin/pacman2pacman-get
#
# Version 1.1
#
# Copyright (C) 2014 Joseph Graham <joseph@t67.eu>
#
# 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 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Where Pacman2pacman will look to find .torrent files.
torrents='http://repo.parabolagnulinux.org/torrents/'
pkg_cache_location='/var/cache/pacman/pkg'
# Pacman2pacman should be called like this from /etc/pacman.conf:
# XferCommand = /usr/bin/pacman2pacman-get %u %o
# Check that the args are not empty.
[[ -z ${1} ]] && { echo "The first argument should be the download url." ; exit 1 ; }
[[ -z ${2} ]] && { echo "The second argument should be the local filename, plus a “.part” extension." ; exit 1 ; }
url="${1}" # The download url.
filename="${2}" # This is where the downloaded file needs to be saved
# or hardlinked
# Check if transmission daemon is running.
if ! systemctl show --property='ActiveState' transmission | grep -q 'ActiveState=active'
then
echo 'Error: The transmission daemon is not running.'
exit 1
fi
torrent_url="${torrents}${url##*/}.torrent"
cd "${pkg_cache_location}"
# Find the name of the package that will be displayed
pname="${url##*/}"
pname="${pname%%-[[:digit:]]*}"
# Check for a .torrent.
if curl -O -f -L -s -A 'Pacman2pacman' "${torrent_url}"
then
# Add the torrent to transmission
transmission-remote -a "${url##*/}.torrent" -w "${pkg_cache_location}" &>/dev/null
# The torrent is now downloading. To get info about the torrent in
# order to display a progress bar we need to know it's id.
# Find out the id of the torrent
id=$(transmission-remote -l | grep "${url##*/}")
id="${id## }"
id="${id## }"
id="${id## }"
id="${id## }"
id="${id## }"
id="${id## }"
id="${id## }"
id="${id## }"
id="${id## }"
id="${id## }"
id="${id## }" # Once should be enough but somehow it's not so I do
# it loads of times.
id="${id%% *}"
# If there is an error there will be an asterix displayed on the
# end of the id. We must remove it.
id="${id%\*}"
if ! [[ ${id} =~ [[:digit:]] ]]
then
echo 'Error.'
exit 1
fi
# Display a progress bar until it's finished and then hardlink it to
# the right place.
progress='0%'
echo -n "Pacman2pacman download: ${pname}: ${progress}"
until [[ "${progress}" == '100%' ]]
do
progress=$(transmission-remote -t "${id}" -i | grep 'Percent Done:')
progress="${progress##* }" # Remove stuff we don't want
printf "\rPacman2pacman download: %s: %s " "${pname}" "${progress}"
sleep 0.7
done
echo
ln -f "${pkg_cache_location}/${url##*/}" "${filename}" || exit 1
else
# There's no .torrent so we download it by just HTTP.
# We must do some complicated stuff to customise the progress
# meter how we want it, to make it consistent with the progress
# bar when we download stuff with transmission.
progress='0%'
echo -n "Pacman2pacman download: ${pname}: ${progress}"
# The first loop gets rid of all the backspace and `#'es and
# stuff. The second loop isolates the percent done number.
curl -# -f -L -o "${filename}" -A 'Pacman2pacman' "${url}" 2>&1 |
while read -N 1 char
do
[[ "${char}" =~ [[:digit:].%\ ] ]] && echo -n "${char}"
done |
while read -d '%' word
do
progress="${word}%"
# For consistency with the transmission progress bar:
[[ "${progress}" == '100.0%' ]] && progress='100%'
printf "\rPacman2pacman download: %s: %s " "${pname}" "${progress}"
done
echo
[[ -f "${filename}" ]] || exit 1
fi
exit
|
