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gnupg/scripts/mkdiff

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#!/bin/sh
# Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
#
# This file is free software; as a special exception the author gives
# unlimited permission to copy and/or distribute it, with or without
# modifications, as long as this notice is preserved.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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if [ $# != 1 ] ; then
echo "usage: mkdiff package-name" >&2
exit 1
fi
pack="$1"
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set -e
curr_ver=$(ls $pack-*.tar.gz 2>/dev/null | sed "s/^$pack-\(.*\)\.tar\.gz/\1/"\
| sort -r -t '.' -n +0 -1 +1 -2 +2 | head -1 )
if [ ! -f $pack-$curr_ver.tar.gz ]; then
echo "mkdiff: no current version of package $pack found" >&2
exit 1
fi
prev_ver=$(ls $pack-*.tar.gz 2>/dev/null | sed "s/^$pack-\(.*\)\.tar\.gz/\1/"\
| sort -r -t '.' -n +0 -1 +1 -2 +2 | head -2 | tail -1 )
if [ "$prev_ver" = "$curr_ver" ]; then
echo "mkdiff: no previous version of package $pack found" >&2
exit 1
fi
echo "Current is: $pack-$curr_ver"
echo "Previous is: $pack-$prev_ver"
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echo "Removing old directories"
[ -d "$pack-$curr_ver" ] && rm -rf "$pack-$curr_ver"
[ -d "$pack-$prev_ver" ] && rm -rf "$pack-$prev_ver"
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echo "Unpacking previous and current tar"
tar xzf "$pack-$curr_ver.tar.gz"
rm -f $pack-${curr_ver}/po/*.gmo
tar xzf "$pack-$prev_ver.tar.gz"
rm -f $pack-${prev_ver}/po/*.gmo
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echo "Diffing"
tmp_name="$pack-$prev_ver-$curr_ver.diff.tmp"
diff_name="$pack-$prev_ver-$curr_ver.diff"
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diff -urN "$pack-$prev_ver/" "$pack-$curr_ver/" > $tmp_name || true
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echo "Making patch file"
cat <<EOF > $diff_name
This is a patch file to create version $curr_ver from $prev_ver.
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Please check the signature of this patch file:
zcat somepath/$pack-$prev_ver-$curr_ver.diff.gz | gpg --verify
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Change to directory $pack-$prev_ver (or however you renamed it)
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and give this command:
zcat somepath/$pack-$prev_ver-$curr_ver.diff.gz | patch -p1
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It is a good idea to rename your current directory to $pack-$curr_ver now.
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Prereq: $prev_ver
EOF
sed -ne '/^diff.*VERSION/,/^+[0-9][0-9]*/ p' $tmp_name >> $diff_name
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echo >> $diff_name
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sed -e '/^diff.*VERSION/,/^+[0-9][0-9]*/ d' $tmp_name >> $diff_name
rm $tmp_name
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echo "Signing and compressing patch file"
gpg --clearsign --not-dash-escaped -u 57548DCD \
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< $diff_name | gzip --best > $diff_name.gz
rm $diff_name
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echo "Checking patch file"
cd $pack-$prev_ver
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zcat ../$diff_name.gz | patch -s -p1
rm $(find . -name "*.orig") 2>/dev/null || true
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cd ..
if ! diff -urN "$pack-$prev_ver/" "$pack-$curr_ver/" >/dev/null ; then
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echo "compare failed"
exit 1
fi
if ! zcat $diff_name.gz | gpg --batch --verify ; then
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exit 1
fi
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echo "cleaning up"
rm -rf "$pack-$curr_ver"
rm -rf "$pack-$prev_ver"
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echo "Patch file $diff_name.gz is good."