166 lines
4.0 KiB
Bash
166 lines
4.0 KiB
Bash
#!@BASH_SHELL@
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#
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# pkgdelta - create delta files for use with pacman and repo-add
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# @configure_input@
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#
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# Copyright (c) 2009 Xavier Chantry <shiningxc@gmail.com>
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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
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# bash options
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set -o nounset
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set -o errexit
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# gettext initialization
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export TEXTDOMAIN='pacman'
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export TEXTDOMAINDIR='@localedir@'
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myver='@PACKAGE_VERSION@'
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QUIET=0
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# ensure we have a sane umask set
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umask 0022
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msg() {
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(( QUIET )) && return
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local mesg=$1; shift
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printf "==> ${mesg}\n" "$@" >&1
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}
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warning() {
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local mesg=$1; shift
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printf "==> $(gettext "WARNING:") ${mesg}\n" "$@" >&2
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}
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error() {
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local mesg=$1; shift
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printf "==> $(gettext "ERROR:") ${mesg}\n" "$@" >&2
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}
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# print usage instructions
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usage() {
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printf "pkgdelta (pacman) %s\n\n" "$myver"
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printf "$(gettext "Usage: pkgdelta [-q] <package1> <package2>\n")"
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printf "$(gettext "\
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pkgdelta will create a delta file between two packages\n\
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This delta file can then be added to a database using repo-add.\n\n")"
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echo "$(gettext "Example: pkgdelta pacman-3.0.0.pkg.tar.gz pacman-3.0.1.pkg.tar.gz")"
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}
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version() {
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printf "pkgdelta (pacman) %s\n\n" "$myver"
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printf "$(gettext "\
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Copyright (c) 2009 Xavier Chantry <shiningxc@gmail.com>.\n\n\
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This is free software; see the source for copying conditions.\n\
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There is NO WARRANTY, to the extent permitted by law.\n")"
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}
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read_pkginfo()
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{
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pkgname= pkgver= arch=
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local OLDIFS=$IFS
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# IFS (field separator) is only the newline character
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IFS="
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"
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local line var val
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for line in $(bsdtar -xOf "$1" .PKGINFO 2>/dev/null |
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grep -v "^#" | sed 's|\(\w*\)\s*=\s*\(.*\)|\1="\2"|'); do
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eval "$line"
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if [[ -n $pkgname && -n $pkgver && -n $arch ]]; then
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IFS=$OLDIFS
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return 0
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fi
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done
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IFS=$OLDIFS
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error "$(gettext "Invalid package '%s'")" "$1"
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return 1
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}
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# $oldfile $oldmd5 $newfile $newmd5 $deltafile $deltamd5 $deltasize
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create_xdelta()
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{
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local oldfile=$1
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local newfile=$2
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local \
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oldname oldver oldarch \
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newname newver newarch \
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deltafile
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read_pkginfo "$oldfile" || return 1
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oldname="$pkgname"
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oldver="$pkgver"
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oldarch="$arch"
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read_pkginfo "$newfile" || return 1
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newname="$pkgname"
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newver="$pkgver"
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newarch="$arch"
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if [[ $oldname != $newname ]]; then
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error "$(gettext "The package names don't match : '%s' and '%s'")" "$oldname" "$newname"
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return 1
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fi
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if [[ $oldarch != $newarch ]]; then
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error "$(gettext "The package architectures don't match : '%s' and '%s'")" "$oldarch" "$newarch"
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return 1
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fi
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if [[ $oldver == $newver ]]; then
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error "$(gettext "Both packages have the same version : '%s'")" "$newver"
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return 1
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fi
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msg "$(gettext "Generating delta from version %s to version %s")" "$oldver" "$newver"
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deltafile="$(dirname $newfile)/$pkgname-${oldver}_to_${newver}-$arch.delta"
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local ret=0
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xdelta3 -q -f -s "$oldfile" "$newfile" "$deltafile" || ret=$?
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if (( ret )); then
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error "$(gettext "Delta could not be created.")"
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return 1
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else
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msg "$(gettext "Generated delta : '%s'")" "$deltafile"
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(( QUIET )) && echo "$deltafile"
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fi
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return 0
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}
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case "$1" in
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-q|--quiet) QUIET=1; shift ;;
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esac
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if (( $# != 2 )); then
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usage
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exit 0
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fi
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if [[ ! -f $1 ]]; then
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error "$(gettext "File '%s' does not exist")" "$1"
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exit 0
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fi
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if [[ ! -f $2 ]]; then
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error "$(gettext "File '%s' does not exist")" "$2"
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exit 0
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fi
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if ! type xdelta3 &>/dev/null; then
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error "$(gettext "Cannot find the xdelta3 binary! Is xdelta3 installed?")"
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exit 1
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fi
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create_xdelta "$1" "$2"
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