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pacman/scripts/pkgdelta.sh.in
Florian Pritz 9efd10cd2a fix vim syntax highlighting of .sh files
vim recognises what type of shell script it's dealing with by looking at
the shebang. If detection fails it falls back to sh which doesn't
support some bash features. Adding a normal, possibly broken, shebang
which gets fixed by the Makefile allows vim to detect bash syntax.

Signed-off-by: Florian Pritz <bluewind@xinu.at>
Signed-off-by: Dan McGee <dan@archlinux.org>
2011-06-30 10:44:45 -05:00

154 lines
3.8 KiB
Bash

#!/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-scripts'
export TEXTDOMAINDIR='@localedir@'
myver='@PACKAGE_VERSION@'
QUIET=0
# ensure we have a sane umask set
umask 0022
m4_include(library/output_format.sh)
# 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 && -n $pkgver && -n $arch ]]; then
IFS=$OLDIFS
return 0
fi
done
IFS=$OLDIFS
error "$(gettext "Invalid package file '%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=$?
if (( ret )); then
error "$(gettext "Delta could not be created.")"
return 1
else
msg "$(gettext "Generated delta : '%s'")" "$deltafile"
(( QUIET )) && echo "$deltafile"
fi
return 0
}
case "$1" in
-q|--quiet) QUIET=1; shift ;;
esac
if (( $# != 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")" "$2"
exit 0
fi
if ! type xdelta3 &>/dev/null; then
error "$(gettext "Cannot find the xdelta3 binary! Is xdelta3 installed?")"
exit 1
fi
create_xdelta "$1" "$2"
# vim: set ts=2 sw=2 noet: