#!/bin/sh

# Facilitates the addition of a new patch to the source tree.

# -- Moves patch to tree

# -- Adds  patch to kernel.spec list of patches

# -- Adds patch to git

# -- change buildid macro to the name of the patch being added

# Base directory is relative to where the script is.

BASEDIR="$(dirname "$(cd $(dirname $BASH_SOURCE[0]) && pwd)")"

pushd $BASEDIR > /dev/null

# Check for at least patch

if [ "$#" -lt 1 ]; then

    echo "usage: $0 [ /path/to/patch/ ] [ description ]"

    exit 1

fi

PATCHDIR=$1

DESC=$2

PATCH="$(basename "$PATCHDIR")"

# Kernel.spec file in the current tree

SPECFILE="$BASEDIR/kernel.spec"

# If adding patch from outside the source tree move it to the source tree

if [ -z "$(ls | grep $PATCH)" ]; then

    cp $PATCHDIR $BASEDIR/

fi

if [ ! -z "$(grep $PATCH $SPECFILE)" ]

then

    echo "$PATCH already in kernel.spec"

    exit 1

fi

# ID number of the last patch in kernel.spec

LPATCH_ID=$(grep ^Patch $SPECFILE | tail -n1 | awk '{ print $1 }' | sed s/Patch// | sed s/://)

# ID of the next patch to be added to kernel.spec

NPATCH_ID=$(($LPATCH_ID + 1 ))

# Add patch with new id at the end of the list of patches

sed -i "/^Patch$LPATCH_ID:\ /a#\ $DESC\nPatch$NPATCH_ID:\ $PATCH" $SPECFILE

# Add it to git

git add $PATCH

BUILDID_PATCH="$(echo $PATCH | sed 's/\-/\_/g' )"

sed -i "s/^.*define buildid .*$/%define buildid .$BUILDID_PATCH/" $SPECFILE

popd > /dev/null