#!/bin/bash

# Add suse Kernel repo headers to a patch created using git-format-patch 

#

# Brandon Philips <bphilips@suse.de>

PATH=$(dirname $0):$PATH

if [ $# -lt 1 ]; then

	echo "usage: $0 <filename> <kernel clone> <repo url>"

	echo "Add relevant headers for patches pulled from git"

	echo ""

	echo "Adds a Git-commit: tag using the From header"

	echo ""

	echo "Adds a Patch-mainline: tag if <kernel path> is given"

	echo "	a useful tree name can be provided in <kernel name>"

	echo "	otherwise basename <kernel path> will be used"

	echo ""

	echo "example usage"

	echo "-------------"

	echo "$0 NULL-pointer-fix.patch"

	echo "$0 NULL-pointer-fix.patch ~/kernel/linux-2.6"

	echo "$0 NULL-pointer-fix.patch ~/kernel/linux-2.6 pci 2.6"

	exit 1

fi

FILE=$1

shift

if [ ! -f $FILE ]; then

	echo "No such file $1"

	exit 2

fi

# try the git cherry-pick -x marker first

commit=$(sed -n 's/^(cherry picked from commit \([0-9a-f]*\))/\1/p' "$FILE")

if test -z "$commit"; then

	commit=$(head -n1 $FILE | sed -n "s%From\s\([0-9a-f]*\)\s.*%\1%p")

else

	sed -i '/^(cherry picked from commit/d' "$FILE"

fi

if [ "z$commit" = "z" ]; then

	echo "$FILE doesn't look like a patch from git"

else

	patch-tag -A git-commit="$commit" $FILE

fi

if [ $# -eq 0 ]; then

	libdir=$(dirname "$(readlink -f "$0")")

	DIR=$("$libdir"/linux_git.sh) || exit 1

else

	DIR=$1

	shift

fi

commit=$(patch-tag -p git-commit $FILE | grep -i "git-commit:" | sed "s%.*:\s\(.*\)%\1%g")

if [ "z$commit" = "z" ]; then

	echo "No git-commit tag in $FILE"

	exit 3

fi

export GIT_DIR=$DIR

if [ ! -d $GIT_DIR ]; then

	echo "No such directory $GIT_DIR"

	echo 4

fi

mainline=$(git describe --contains --match 'v*' $commit 2> /dev/null)

if test -z "$mainline"; then

	mainline=$(git describe --contains  $commit 2> /dev/null)

fi

mainline=${mainline%%[~^]*}

if [ "z$mainline" = "z" ]; then

	if git show $commit > /dev/null 2> /dev/null; then

		patch-tag -A Patch-mainline="Queued in subsystem maintainer repository" "$FILE"

		if test -n "$1"; then

			patch-tag -A Git-repo="$*" "$FILE"

		else

			echo "warning: Non-mainline commit in $FILE but no repo url specified"

		fi

		exit 0

	else

		echo "$commit from $FILE does not exist in $DIR"

		exit 5

	fi

fi

patch-tag -A Patch-mainline="$mainline" $FILE