#!/bin/bash
#
# Script to take a stable-queue, and turn it into a -rc release to be
# sent off in email.
#

# locations of some things that you might want to override if you are a
# different developer than gregkh
STABLE_QUEUE="/home/gregkh/linux/stable/stable-queue/"
TMP_DIR="/home/gregkh/linux/tmp/"

SCRIPT_NAME=`basename ${0}`
DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

# programs that we depend on in this script
REQUIREMENTS="kv splitmbox.py kup mbox2send filterdiff"
# todo check dependancies using hash or something


MBOX="$1"
if [ "${MBOX}" == "" ] ; then
	echo "using default 'mbox' name for the mailbox."
	MBOX="mbox"
fi

FULL_VERSION=`kv`
BASE_VERSION=${FULL_VERSION/-rc?/}
VERSION=`basename \`pwd\``
ROOT_VERSION=${VERSION/\.y/}
ROOT_VERSION=${ROOT_VERSION/linux-/}

REL_ARRAY=(${FULL_VERSION//./ })
MAJOR=${REL_ARRAY[0]}
VER="${MAJOR}.x"

RC_ARRAY=(${FULL_VERSION//-/ })
RC=${RC_ARRAY[1]}

#DATE=`date -u --date="2 days"`
DATE=`date -u --rfc-822 --date="2 days"`

if [ ${FULL_VERSION} == ${BASE_VERSION} ] ; then
	echo "Makefile says the version is ${FULL_VERSION}, did you forget to set the -rc version?"
	exit
fi


# create a directory for everything to live in
#TMP_DIR=`mktemp -d ${TMP_DIR}/stable-${ROOT_VERSION}-XXXX` || exit 1
TMP_DIR=`mktemp -d ${TMP_DIR}/stable-${FULL_VERSION}-XXX` || exit 1

# Generate the Makefile diff, with just the version number change in it
# relies on filterdiff from the wonderful patchutils package
git diff Makefile | filterdiff --hunks 1 > ${TMP_DIR}/Makefile.patch


# make a git tree to create the log file in the format that Linus likes.
echo "Creating a git tree of the commits..."
ORIGINAL_DIR=`pwd`
TMP_TREE=`mktemp -d ${TMP_DIR}/stable-${ROOT_VERSION}-XXXX` || exit 1
TMP_LOG=`mktemp ${TMP_DIR}/stable-log-XXXX` || exit 1
git clone -s . ${TMP_TREE}
cd ${TMP_TREE}
git checkout -b temp_branch
git quiltimport --patches=${STABLE_QUEUE}/queue-${ROOT_VERSION}
if [ $? -ne 0 ]; then
	echo "git quilt import failed!!!"
	exit 1
fi

# Apply the Makefile patch and commit it
patch -p1 < ${TMP_DIR}/Makefile.patch
git commit -a -m "Linux ${FULL_VERSION}"

# Generate the diffstat and patch
git diff ${VERSION}..HEAD > ${TMP_DIR}/patch-${FULL_VERSION}
git diff --stat ${VERSION}..HEAD > ${TMP_DIR}/diffstat

# sign the patch
gpg -a -b ${TMP_DIR}/patch-${FULL_VERSION}

# generate the log file
git log --abbrev=12 --format="%aN <%aE>%n    %s%n" ${VERSION}..HEAD > ${TMP_LOG}

# clean up the git tree by deleting it
cd ${ORIGINAL_DIR}
#rm -rf ${TMP_TREE}


echo "Creating the mailbox for kernel release ${FULL_VERSION}"
TMPFILE=`mktemp ${TMP_DIR}/stable_header.XXXXXX` || exit 1
NUM_PATCHES=`quilt series | wc -l`

(
echo "This is the start of the stable review cycle for the ${BASE_VERSION} release."
echo "There are ${NUM_PATCHES} patches in this series, all will be posted as a response"
echo "to this one.  If anyone has any issues with these being applied, please"
echo "let me know."
echo ""
echo "Responses should be made by ${DATE}."
echo "Anything received after that time might be too late."
echo ""
echo "The whole patch series can be found in one patch at:"
echo "	https://www.kernel.org/pub/linux/kernel/v${VER}/stable-review/patch-${FULL_VERSION}.gz"
echo "or in the git tree and branch at:"
echo "	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-${ROOT_VERSION}.y"
echo "and the diffstat can be found below."
echo ""
echo "thanks,"
echo ""
echo "greg k-h"
echo ""
echo "-------------"
echo "Pseudo-Shortlog of commits:"
echo ""
cat ${TMP_LOG}
#stable-shortlog
echo ""
echo "-------------"
echo ""
echo "Diffstat:"
echo ""

cat ${TMP_DIR}/diffstat
) > ${TMPFILE}

FROM="Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
TO="linux-kernel@vger.kernel.org"
CC="stable@vger.kernel.org"
#SUBJECT="${BASE_VERSION}-stable review"
SUBJECT="${FULL_VERSION} review"

quilt mail --mbox ${TMP_DIR}/${MBOX}	\
	-M "${TMPFILE}"		\
	--sender "${FROM}"	\
	--from "${FROM}"	\
	--to "${TO}"		\
	--cc "${CC}"		\
	--prefix "PATCH ${ROOT_VERSION}"	\
	--subject "${SUBJECT}"

rm ${TMPFILE} ${TMP_LOG}

echo "mbox is now in ${TMP_DIR}/${MBOX}"

cd ${TMP_DIR}
${STABLE_QUEUE}/scripts/mbox2send ${ROOT_VERSION} ${FULL_VERSION} ${MBOX}
#< ${MBOX}.new formail -ds sh -c 'cat > msg.$FILENO'
splitmbox.py ${MBOX}.new .

# find the "0" email message
if [ -f "msg.0" ]; then
	MSG="msg.0"
elif [ -f "msg.00" ]; then
	MSG="msg.00"
elif [ -f "msg.000" ]; then
	MSG="msg.000"
elif [ -f "msg.0000" ]; then
	MSG="msg.0000"
else
	echo "msg.ZERO can not be found???"
	echo "Aborting!"
	exit 1
fi

# List of names to cc: on the 00/XX email message
# must escape '.' characters properly due to use of sed below
CC_NAMES=("torvalds@linux-foundation\.org"
	  "akpm@linux-foundation\.org"
	  "linux@roeck-us\.net"
	  "shuah@kernel\.org"
	  "patches@kernelci\.org"
	  "lkft-triage@lists\.linaro\.org"
	  "pavel@denx\.de"
	  "jonathanh@nvidia\.com"
	  "f\.fainelli@gmail\.com"
	  "sudipm\.mukherjee@gmail\.com"
	  "slade@sladewatkins\.com")

CC_LIST="stable@vger\.kernel\.org"
for name in "${CC_NAMES[@]}"; do
	CC_LIST+=", ${name}"
done
echo "Adding names to ${MSG}: ${CC_LIST}"

sed -i -e "s/Cc: stable@vger\.kernel\.org/Cc: ${CC_LIST}/" "${TMP_DIR}"/"${MSG}"


# Create a script to upload the patch to kernel.org and to send the patches out
echo "#!/bin/bash" > ${TMP_DIR}/send_it_off
echo "kup --host=git@gitolite.kernel.org --subcmd=kup-server put patch-${FULL_VERSION} patch-${FULL_VERSION}.asc /pub/linux/kernel/v${VER}/stable-review/patch-${FULL_VERSION}.gz" >> ${TMP_DIR}/send_it_off

if [ "${RC}" == "rc1" ] ; then
	echo "git send-email msg.*" >> ${TMP_DIR}/send_it_off
	echo "#git send-email ${MSG}" >> ${TMP_DIR}/send_it_off
else
	echo "#git send-email msg.*" >> ${TMP_DIR}/send_it_off
	echo "git send-email ${MSG}" >> ${TMP_DIR}/send_it_off
fi

chmod 755 ${TMP_DIR}/send_it_off


# Push a version of the patches out to the world in a git tree
cd ${TMP_TREE}
git checkout linux-${ROOT_VERSION}.y
git merge -q temp_branch
#echo "git push --force gitolite@ra.kernel.org:/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-${ROOT_VERSION}.y"
#git push --force gitolite@ra.kernel.org:/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-${ROOT_VERSION}.y
echo "git push --force git@gitolite.kernel.org:/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-${ROOT_VERSION}.y"
git push --force git@gitolite.kernel.org:/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-${ROOT_VERSION}.y

# clean up the git tree by deleting it
cd ${ORIGINAL_DIR}
rm -rf ${TMP_TREE}

# announce what needs to be done
echo "cd ${TMP_DIR}"
echo "./send_it_off"