initial import of generic patch.sh script

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

.gitignore

@@ -0,0 +1,5 @@
+export
+kernel
+
+patch_script.sh
+src-uri.txt

README.md

@@ -1,4 +1,13 @@
 kernel
 ======
 
-Kernel for the beagleboard.org boards
+Kernel for the beagleboard.org boards
+
+usage
+======
+
+beaglebone-3.2 patchset:
+
+git checkout origin/beaglebone-3.2 -b beaglebone-3.2
+./patch.sh
+

patch.sh

@@ -0,0 +1,103 @@
+#!/bin/bash
+# (c) 2009 - 2012 Koen Kooi <koen@dominion.thruhere.net>
+# (c) 2012 Robert Nelson <robertcnelson@gmail.com>
+# This script will take a set of directories with patches and make a git tree out of it
+# After all the patches are applied it will output a SRC_URI fragment you can copy/paste into a recipe
+set -e
+
+# don't use builtin 'echo' from /bin/sh
+export ECHO="$(which echo)"
+
+DIR="$PWD"
+PATCHPATH="${DIR}/patches"
+EXPORTPATH="${DIR}/export"
+
+#For TAG, use mainline Kernel tags
+TAG="v3.2"
+EXTRATAG=""
+
+#EXTERNAL_TREE="git://arago-project.org/git/projects/linux-am33x.git"
+#EXTERNAL_BRANCH="v3.2-staging"
+#EXTERNAL_SHA="e8004dad869568692ca2a45c04e8464ce48cc4d7"
+
+PATCHSET="dirs"
+
+git_kernel_stable () {
+	git pull git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git master --tags || true
+}
+
+git_pull_torvalds () {
+	git pull git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master --tags || true
+	#Maybe, we need a stable tag '3.0.2'?
+	git tag | grep ${TAG} >/dev/null || git_kernel_stable
+}
+
+if [ ! -d ${DIR}/kernel ] ; then
+	mkdir -p ${DIR}/kernel
+fi
+
+cd ${DIR}/kernel
+
+if [ ! -f ./.git/config ] ; then
+	git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git .
+else
+	git fetch
+fi
+
+git am --abort || echo "Do you need to make sure the patches apply cleanly first?"
+
+# Always return to master, and remove patched branch...
+git reset --hard
+git checkout master -f
+git describe
+git branch -D tmp-patching-branch &>/dev/null || true
+git branch -D tmp-patching-branch-sha &>/dev/null || true
+
+#Do we have the tag?
+git tag | grep ${TAG} | grep -v rc >/dev/null || git_pull_torvalds
+git checkout ${TAG} -b tmp-patching-branch
+
+if [ "${EXTERNAL_TREE}" ] ; then
+	#we are pulling the  external tree into 1st branch, and checkout the SHA into a 2nd, 
+	#which saves a little pain in cleaning up master, when switching between different beagleboard branches
+	git pull ${EXTERNAL_TREE} ${EXTERNAL_BRANCH}
+	git checkout ${EXTERNAL_SHA} -b tmp-patching-branch-sha
+fi
+
+git describe
+
+if [ -d ${EXPORTPATH} ] ; then
+	rm -rf ${EXPORTPATH} || true
+fi
+
+# apply patches
+for patchset in ${PATCHSET} ; do
+	mkdir -p ${EXPORTPATH}/$patchset
+	patchcount=0
+	for patch in $(ls -1 ${PATCHPATH}/$patchset/*.patch | sort -n) ; do
+		$ECHO -n "$patch: "
+		git am -q $patch && echo applied || exit 1
+		let patchcount=$patchcount+1
+	done
+	git format-patch -${patchcount} --quiet -o ${EXPORTPATH}/$patchset
+	git commit --allow-empty -a -m "${TAG}-${patchset}${EXTRATAG}"
+done
+
+if [ -f ${DIR}/src-uri.txt ] ; then
+	rm -rf ${DIR}/src-uri.txt || true
+fi
+
+if [ -f ${DIR}/patch_script.sh ] ; then
+	rm -rf ${DIR}/patch_script.sh || true
+fi
+
+# export patches and output SRC_URI for them
+for patchset in ${PATCHSET} ; do
+	mkdir -p ${EXPORTPATH}
+	for patch in $(ls -1 ${PATCHPATH}/$patchset/*.patch | sort -n) ; do
+		patch=${patch##*/}
+		echo "            file://${patchset}/$patch \\" >> ${DIR}/src-uri.txt
+		echo "	git am \"\${DIR}/patches/${patchset}/$patch\"" >> ${DIR}/patch_script.sh
+	done
+done
+