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Diffstat (limited to 'scripts/pkgdelta.sh.in')
| -rw-r--r-- | scripts/pkgdelta.sh.in | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/scripts/pkgdelta.sh.in b/scripts/pkgdelta.sh.in new file mode 100644 index 00000000..588dc49d --- /dev/null +++ b/scripts/pkgdelta.sh.in @@ -0,0 +1,165 @@ +#!/bin/bash +# +# pkgdelta - create delta files for use with pacman and repo-add +# @configure_input@ +# +# Copyright (c) 2009 Xavier Chantry <shiningxc@gmail.com> +# +# 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, see <http://www.gnu.org/licenses/>. +# + +# bash options +set -o nounset +set -o errexit + +# gettext initialization +export TEXTDOMAIN='pacman' +export TEXTDOMAINDIR='@localedir@' + +myver='@PACKAGE_VERSION@' + +QUIET=0 + +# ensure we have a sane umask set +umask 0022 + +msg() { + [ $QUIET -ne 0 ] && return + local mesg=$1; shift + printf "==> ${mesg}\n" "$@" >&1 +} + +warning() { + local mesg=$1; shift + printf "==> $(gettext "WARNING:") ${mesg}\n" "$@" >&2 +} + +error() { + local mesg=$1; shift + printf "==> $(gettext "ERROR:") ${mesg}\n" "$@" >&2 +} + +# print usage instructions +usage() { + printf "pkgdelta (pacman) %s\n\n" "$myver" + printf "$(gettext "Usage: pkgdelta [-q] <package1> <package2>\n")" + printf "$(gettext "\ + pkgdelta will create a delta file between two packages\n\ +This delta file can then be added to a database using repo-add.\n\n")" + echo "$(gettext "Example: pkgdelta pacman-3.0.0.pkg.tar.gz pacman-3.0.1.pkg.tar.gz")" +} + +version() { + printf "pkgdelta (pacman) %s\n\n" "$myver" + printf "$(gettext "\ +Copyright (c) 2009 Xavier Chantry <shiningxc@gmail.com>.\n\n\ +This is free software; see the source for copying conditions.\n\ +There is NO WARRANTY, to the extent permitted by law.\n")" +} + +read_pkginfo() +{ + pkgname= pkgver= arch= + local OLDIFS=$IFS + # IFS (field separator) is only the newline character + IFS=" +" + local line var val + for line in $(bsdtar -xOf "$1" .PKGINFO 2>/dev/null | + grep -v "^#" | sed 's|\(\w*\)\s*=\s*\(.*\)|\1="\2"|'); do + eval "$line" + if [ -n "$pkgname" -a -n "$pkgver" -a -n "$arch" ]; then + IFS=$OLDIFS + return 0 + fi + done + IFS=$OLDIFS + error "$(gettext "Invalid package '%s'")" "$1" + return 1 +} + +# $oldfile $oldmd5 $newfile $newmd5 $deltafile $deltamd5 $deltasize +create_xdelta() +{ + local oldfile=$1 + local newfile=$2 + local \ + oldname oldver oldarch \ + newname newver newarch \ + deltafile + + read_pkginfo "$oldfile" || return 1 + oldname="$pkgname" + oldver="$pkgver" + oldarch="$arch" + read_pkginfo "$newfile" || return 1 + newname="$pkgname" + newver="$pkgver" + newarch="$arch" + + if [ "$oldname" != "$newname" ]; then + error "$(gettext "The package names don't match : '%s' and '%s'")" "$oldname" "$newname" + return 1 + fi + + if [ "$oldarch" != "$newarch" ]; then + error "$(gettext "The package architectures don't match : '%s' and '%s'")" "$oldarch" "$newarch" + return 1 + fi + + if [ "$oldver" == "$newver" ]; then + error "$(gettext "Both packages have the same version : '%s'")" "$newver" + return 1 + fi + + msg "$(gettext "Generating delta from version %s to version %s")" "$oldver" "$newver" + deltafile="$(dirname $newfile)/$pkgname-${oldver}_to_${newver}-$arch.delta" + local ret=0 + + xdelta3 -q -f -s "$oldfile" "$newfile" "$deltafile" || ret=$? + if [ $ret -ne 0 ]; then + error "$(gettext "Delta could not be created.")" + return 1 + else + msg "$(gettext "Generated delta : '%s'")" "$deltafile" + [ $QUIET -eq 1 ] && echo "$deltafile" + fi + return 0 +} + +case "$1" in + -q|--quiet) QUIET=1; shift ;; +esac + +if [ $# -ne 2 ]; then + usage + exit 0 +fi + +if [ ! -f "$1" ]; then + error "$(gettext "File '%s' does not exist")" "$1" + exit 0 +fi + +if [ ! -f "$2" ]; then + error "$(gettext "File '%s' does not exist")" "$2" + exit 0 +fi + +if [ ! "$(type -p xdelta3)" ]; then + error "$(gettext "Cannot find the xdelta3 binary! Is xdelta3 installed?")" + exit 1 +fi + +create_xdelta "$1" "$2" |