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#!/bin/bash -e
# Copyright (C) 2008 Andrea Mennucci.
# License: GNU Library General Public License, version 2 or later
# this small script is capable of applying a deb delta,
# it basically summarizes what "debpatch" does
if test "$3" = "" ; then
echo Provide 3 arguments: patchin fromfile tofile
exit
fi
if test "$2" = / ; then
echo Sorry, for this simple script you really need the old deb
exit 1
fi
case "$1" in
/*) delta="$1" ;;
*) delta=`pwd`/"$1" ;;
esac
olddeb="$2"
newdeb="$3"
TD=${TMPDIR:-/tmp}/debpatch$$
mkdir $TD $TD/OLD $TD/OLD/CONTROL $TD/OLD/DATA $TD/NEW $TD/NEW/CONTROL $TD/NEW/DATA $TD/PATCH
ln -s '/usr/lib/debdelta/minigzip' '/usr/lib/debdelta/minibzip2' $TD/
ar p $olddeb control.tar.gz | tar -x -z -p -f - -C $TD/OLD/CONTROL
if ar t $olddeb | grep -q data.tar.lzma ; then
ar p $olddeb data.tar.lzma | unlzma -c | tar -x -p -f - -C $TD/OLD/DATA
elif ar t $olddeb | grep -q data.tar.bz2 ; then
ar p $olddeb data.tar.bz2 | tar -x --bzip2 -p -f - -C $TD/OLD/DATA
else
ar p $olddeb data.tar.gz | tar -x -z -p -f - -C $TD/OLD/DATA
fi
pushd $TD > /dev/null
cd PATCH
ar x "$delta"
cd $TD
if test -r PATCH/patch.sh.lzma ; then
unlzma PATCH/patch.sh.lzma
elif test -r PATCH/patch.sh.gz ; then
gunzip PATCH/patch.sh.gz
elif test -r PATCH/patch.sh.bz2 ; then
bunzip2 PATCH/patch.sh.bz2
fi
#dash will not work, see bug 379227
bash -e PATCH/patch.sh
#note that we do not check MD5 in this simple script..
popd > /dev/null
mv -vb $TD/NEW.file "$newdeb"
#eventually,
#rm -r "$TD"
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