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#!/bin/bash
# build -stable release from current -stable series
# Copyright (c) 2005 Chris Wright <chrisw@osdl.org>
# Copyright (c) 2006-2011 Greg Kroah-Hartman <greg@kroah.com>
#


if [ $# -ne 1 ]; then
	KETCHUP=`which kv 2>/dev/null`
	if [ -z "$KETCHUP" ]; then
		echo -e "Usage:\t $0 release_number"
		echo -e "e.g.\t $0 2.6.11.12"
		echo -e "or install ketchup to automatically release the latest kernel version."
		exit 1
	fi
	RELEASE=`kv`
else
	RELEASE=$1
fi

REL_ARRAY=(${RELEASE//./ })
BASE=${REL_ARRAY[0]}.${REL_ARRAY[1]}.${REL_ARRAY[2]}
REL=${REL_ARRAY[3]}
MAJOR=${REL_ARRAY[0]}
MINOR=${REL_ARRAY[2]}

LONGTERM=0
# see if this is a "longterm" kernel or not
if [ $MAJOR == "2" ]; then
	if [ $MINOR == "27" ]; then
		LONGTERM=1
	fi
	if [ $MINOR == "32" ]; then
		LONGTERM=1
	fi
	if [ $MINOR == "33" ]; then
		LONGTERM=1
	fi
	if [ $MINOR == "34" ]; then
		LONGTERM=1
	fi
	if [ $MINOR == "35" ]; then
		LONGTERM=1
	fi
fi
#echo "major = $MAJOR, minor = $MINOR, longterm = $LONGTERM"

# 5.x or 4.x or 3.x or 2.6?
VER="2.6"
if [ ${MAJOR} == "3" ] ; then
	# 3.x series
	VER="3.0"
	BASE=${REL_ARRAY[0]}.${REL_ARRAY[1]}
	REL=${REL_ARRAY[2]}
	MINOR=${REL_ARRAY[1]}
fi
if [ ${MAJOR} == "4" ] ; then
	# 4.x series
	VER="4.x"
	BASE=${REL_ARRAY[0]}.${REL_ARRAY[1]}
	REL=${REL_ARRAY[2]}
	MINOR=${REL_ARRAY[1]}
fi
if [ ${MAJOR} == "5" ] ; then
	# 5.x series
	VER="5.x"
	BASE=${REL_ARRAY[0]}.${REL_ARRAY[1]}
	REL=${REL_ARRAY[2]}
	MINOR=${REL_ARRAY[1]}
fi
if [ ${MAJOR} == "6" ] ; then
	# 6.x series
	VER="6.x"
	BASE=${REL_ARRAY[0]}.${REL_ARRAY[1]}
	REL=${REL_ARRAY[2]}
	MINOR=${REL_ARRAY[1]}
fi


LAST=$(($REL - 1))
INCREMENTAL=1
if [ $LAST -eq 0 ]; then
	LAST_REL=${BASE}
	INCREMENTAL=0
else
	LAST_REL=${BASE}.${LAST}
fi
echo "# About to create stable release $RELEASE (base $BASE last version $LAST_REL)"
echo "# "

BASE_COMMIT="$(git cat-file tag v${BASE} | grep object | cut -d" " -f2)"
LAST_COMMIT="$(git cat-file tag v${LAST_REL} | grep object | cut -d" " -f2)"
RELEASE_COMMIT="$(git cat-file tag v${RELEASE} | grep object | cut -d" " -f2)"
#echo "# BASE_COMMIT=$BASE_COMMIT"
#echo "# LAST_COMMIT=$LAST_COMMIT"
#echo "# RELEASE_COMMIT=$RELEASE_COMMIT"
#echo "#"

echo -n "# [ret] to continue"
read

RELDIR="../release-$RELEASE"

if [ -d ${RELDIR} ] ; then
	rm ${RELDIR}/*
else
	mkdir ${RELDIR}
fi

echo "# building tree in ${RELDIR}"

# build release materials, tarball, base patch, incr patch, changelog
#git archive --format=tar --prefix=linux-$RELEASE/ HEAD | gzip -9 > $RELDIR/linux-${RELEASE}.tar.gz
#git diff-tree -p $BASE_COMMIT $RELEASE_COMMIT | gzip -9 > $RELDIR/patch-${RELEASE}.gz
#if [ $INCREMENTAL -ne 0 ]; then
#	git diff-tree -p $LAST_COMMIT $RELEASE_COMMIT | gzip -9 > $RELDIR/patch-${LAST_REL}-${REL}.gz
#fi
#zcat $RELDIR/patch-${LAST_REL}-${REL}.gz | diffstat -p1 > $RELDIR/diffstat-${LAST_REL}-${REL} 2>/dev/null

git archive --format=tar --prefix=linux-$RELEASE/ $RELEASE_COMMIT > $RELDIR/linux-${RELEASE}.tar
git diff-tree -p $BASE_COMMIT $RELEASE_COMMIT > $RELDIR/patch-${RELEASE}
if [ $INCREMENTAL -ne 0 ]; then
	git diff-tree -p $LAST_COMMIT $RELEASE_COMMIT > $RELDIR/patch-${LAST_REL}-${REL}
	cat $RELDIR/patch-${LAST_REL}-${REL} | diffstat -p1 > $RELDIR/diffstat-${LAST_REL}-${REL} 2>/dev/null
else
	cat $RELDIR/patch-${RELEASE} | diffstat -p1 > $RELDIR/diffstat-${RELEASE} 2>/dev/null
fi
git log ${LAST_COMMIT}..${RELEASE_COMMIT} > $RELDIR/ChangeLog-$RELEASE
< $RELDIR/ChangeLog-$RELEASE git shortlog > $RELDIR/shortlog-$RELEASE

# sign all the needed files
gpg -a -b ${RELDIR}/linux-${RELEASE}.tar
gpg -a -b ${RELDIR}/patch-${RELEASE}
gpg -a -b ${RELDIR}/ChangeLog-${RELEASE}
if [ $INCREMENTAL -ne 0 ]; then
	gpg -a -b ${RELDIR}/patch-${LAST_REL}-${REL}
fi


echo "# "
#HOST="gregkh@geb.kernel.org"
HOST="git@gitolite.kernel.org"
SCRIPT="${RELDIR}/upload_v${RELEASE}"
touch ${SCRIPT}
chmod 755 ${SCRIPT}

if [ $LONGTERM -eq 1 ]; then
	echo "# This is a longterm release"
	echo "# finalize the release:"
	echo "cd ${RELDIR}"
	echo "kup --host=${HOST} --subcmd=kup-server put --tar --prefix=linux-${RELEASE}/ /pub/scm/linux/kernel/git/stable/linux-stable.git v${RELEASE} linux-${RELEASE}.tar.asc /pub/linux/kernel/v${VER}/longterm/v${BASE}/linux-${RELEASE}.tar.gz" | tee -a ${SCRIPT}
	echo "kup --host=${HOST} --subcmd=kup-server put ChangeLog-${RELEASE} ChangeLog-${RELEASE}.asc      /pub/linux/kernel/v${VER}/longterm/v${BASE}/" | tee -a ${SCRIPT}
	echo "kup --host=${HOST} --subcmd=kup-server put patch-${RELEASE}     patch-${RELEASE}.asc     /pub/linux/kernel/v${VER}/longterm/v${BASE}/patch-${RELEASE}.gz" | tee -a ${SCRIPT}
	if [ $INCREMENTAL -ne 0 ]; then
		echo "kup --host=${HOST} --subcmd=kup-server put patch-${LAST_REL}-${REL} patch-${LAST_REL}-${REL}.asc /pub/linux/kernel/v${VER}/longterm/v${BASE}/incr/patch-${LAST_REL}-${REL}.gz" | tee -a ${SCRIPT}
	fi
#	echo "mv $RELDIR/linux-${RELEASE}.tar.gz ~/v2.6/longterm/v${BASE}/"
#	echo "mv $RELDIR/ChangeLog-${RELEASE} ~/v2.6/longterm/v${BASE}/"
#	echo "mv $RELDIR/patch-${RELEASE}.gz ~/v2.6/longterm/v${BASE}/"
#	echo "cp $RELDIR/patch-${LAST_REL}-${REL}.gz ~/v2.6/longterm/v${BASE}/incr/"
#	echo "mv $RELDIR/patch-${LAST_REL}-${REL}.gz ~"
#	echo "mv $RELDIR/diffstat-${LAST_REL}-${REL} ~"
#	echo "mv $RELDIR/shortlog-${RELEASE} ~"
else
	echo "# This is a stable release"
	echo "# finalize it:"
	echo "cd ${RELDIR}"
	echo "kup --host=${HOST} --subcmd=kup-server put --tar --prefix=linux-${RELEASE}/ /pub/scm/linux/kernel/git/stable/linux-stable.git v${RELEASE} linux-${RELEASE}.tar.asc /pub/linux/kernel/v${VER}/linux-${RELEASE}.tar.gz" | tee -a ${SCRIPT}
	echo "kup --host=${HOST} --subcmd=kup-server put ChangeLog-${RELEASE} ChangeLog-${RELEASE}.asc      /pub/linux/kernel/v${VER}/" | tee -a ${SCRIPT}
	echo "kup --host=${HOST} --subcmd=kup-server put patch-${RELEASE}     patch-${RELEASE}.asc     /pub/linux/kernel/v${VER}/patch-${RELEASE}.gz" | tee -a ${SCRIPT}
	if [ $INCREMENTAL -ne 0 ]; then
		echo "kup --host=${HOST} --subcmd=kup-server put patch-${LAST_REL}-${REL} patch-${LAST_REL}-${REL}.asc /pub/linux/kernel/v${VER}/incr/patch-${LAST_REL}-${REL}.gz" | tee -a ${SCRIPT}
	fi
#	echo "mv $RELDIR/patch-${LAST_REL}-${REL}.gz ~"
#	echo "mv $RELDIR/diffstat-${LAST_REL}-${REL} ~"
#	echo "mv $RELDIR/shortlog-${RELEASE} ~"
#	LATEST=`ls ~/v${VER}/LATEST-IS*`
#	LATEST=`basename $LATEST`
#	echo "# current LATEST-IS is '$LATEST' is that what it should be?"
#	echo "# mv ~/v${VER}/${LATEST} ~/v${VER}/LATEST-IS-${RELEASE}"
fi

# create the email

#Subject: Linux ${RELEASE}

cat << __EOF__ > ${RELDIR}/email
I'm announcing the release of the ${RELEASE} kernel.

All users of the ${BASE} kernel series must upgrade.

The updated ${BASE}.y git tree can be found at:
	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-${BASE}.y
and can be browsed at the normal kernel.org git web browser:
	https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary

thanks,

greg k-h

------------

__EOF__

if [ $INCREMENTAL -ne 0 ]; then
	cat ${RELDIR}/diffstat-${LAST_REL}-${REL} >> ${RELDIR}/email
else
	cat ${RELDIR}/diffstat-${RELEASE} >> ${RELDIR}/email
fi

echo "" >> ${RELDIR}/email
cat $RELDIR/shortlog-$RELEASE >> ${RELDIR}/email


# create script to send email out

cat << __EOF__ > ${RELDIR}/send_email
#!/bin/bash

FROM="Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
TO="linux-kernel@vger.kernel.org, akpm@linux-foundation.org, torvalds@linux-foundation.org, stable@vger.kernel.org"
CC="lwn@lwn.net, jslaby@suse.cz"
SUBJECT="Linux ${RELEASE}"
ID=\$(make_message_id)

cat email | 				\\
	makemail -to="\${TO}"		\\
		-from="\${FROM}"		\\
		-cc="\${CC}"		\\
		-subject="\${SUBJECT}"	\\
		-message_id="\${ID}"	\\
		-date="\$(date -R)"	\\
	> msg.000

PATCH_ID=\$(make_message_id)
cat patch-${LAST_REL}-${REL} |				\\
	makemail -to="\${TO}"			\\
		-from="\${FROM}"			\\
		-cc="\${CC}"			\\
		-subject="Re: \${SUBJECT}"	\\
		-message_id="\${PATCH_ID}"	\\
		-reply_to="\${ID}"		\\
		-date="\$(date -R)"		\\
	> msg.001

git send-email msg.000 msg.001
__EOF__

chmod 755 ${RELDIR}/send_email