#!/bin/sh
. `dirname $0`/common

if [ -z "$1" ]; then
	echo "Usage: $0 newversion [newrevision] [manifest]"
	exit 1
fi

lco platform/manifest

NEWVER="$1"

if [ -n "$2" ]; then
	NEWREV="$2"
else
	NEWREV=1
fi

if [ -n "$3" ]; then
	MANIFEST=platform/manifest/$3.xml
else
	MANIFEST=platform/manifest/default.xml
fi

defaultrev="`xmllint --format $MANIFEST |grep '<default' |sed -e 's,.* revision=\",,;s,\".*,,'`"
echo $defaultrev

rm -f /tmp/newbranch.list /tmp/merge.list /tmp/trouble.list /tmp/commit-id.list
xmllint --format $MANIFEST |grep '<project' | while read r; do
	name="`echo $r |sed -e 's,.* name=\",,;s,\".*,,'`"
	echo "========================================"
	echo $name
	echo "========================================"
	rev=""
	if echo $r |grep -q " revision=\""; then
		rev="`echo $r |sed -e 's,.* revision=\",,;s,\".*,,'`"
	else
		rev="$defaultrev"
	fi

	if [ "$rev" = "linaro_mmwg" ]; then
		echo "Nothing to do, the MMWG branch is completely independent of AOSP"
	elif echo $rev |grep -qE "^[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]$"; then
		echo "Nothing to do for $name, checked out by commit ID"
		echo $name >>/tmp/commit-id.list
	elif echo $rev |grep -qE "^(refs/tags/|)android-"; then
		echo "Nothing to do for $name, we don't touch it"
	else
		lco $name $rev
		if ! cd $SRC/$name; then
			echo "Nothing to do for $name, not on android.git.linaro.org"
			continue
		fi
		if ! git remote |grep -qE '^aosp$'; then
			echo "Nothing to do for $name, not part of AOSP"
			continue
		fi
		if echo $rev |grep -qE "^linaro_android_$ANDROIDVERSION$"; then
			if [ "$ANDROIDVERSION" != "$NEWVER" ]; then
				echo "$name: Creating linaro_android_$NEWVER based on linaro_android_$ANDROIDVERSION and android-${NEWVER}_r$NEWREV"
				echo "$name" >>/tmp/newbranch.list
				git checkout -b linaro_android_$NEWVER origin/linaro_android_$ANDROIDVERSION
				if git rebase android-${NEWVER}_r$NEWREV; then
					git push gerrit linaro_android_$NEWVER
					git fetch --all
					git branch --set-upstream --track linaro_android_$NEWVER origin/linaro_android_$NEWVER
					git pull
				else
					echo "$name" >>/tmp/trouble.list
				fi
			else
				echo "$name: Merging changes from android-${NEWVER}_r$NEWREV into linaro_android_$ANDROIDVERSION"
				echo "$name" >>/tmp/merge.list
				if git merge --log -m "Merge android-${NEWVER}_r$NEWREV:" android-${NEWVER}_r$NEWREV; then
					git push gerrit linaro_android_$NEWVER
					git fetch --all
					git pull
				else
					echo "$name" >>/tmp/trouble.list
				fi
			fi
		else
			if [ "$ANDROIDVERSION" != "$NEWVER" ]; then
				echo "$name: Rebasing $rev to android-${NEWVER}_r$NEWREV"
				echo "$name: $rev" >>/tmp/merge.list
				if git rebase android-${NEWVER}_r$NEWREV; then
					git push gerrit $rev
				else
					echo "$name" >>/tmp/trouble.list
				fi
			else
				echo "$name: Merging changes from android-${NEWVER}_r$NEWREV into $rev"
				echo "$name: $rev" >>/tmp/merge.list
				if git merge --log -m "Merge android-${NEWVER}_r$NEWREV:" android-${NEWVER}_r$NEWREV; then
					git push gerrit $rev
				else
					echo "$name" >>/tmp/trouble.list
				fi
			fi
		fi
	fi
done
# Lastly, let's update the manifest...
cd ${SRC}/platform/manifest
if [ "$ANDROIDVERSION" != "$NEWVER" ]; then
	git checkout -b linaro_android_${NEWVER} origin/linaro_android_${ANDROIDVERSION}
	sed -i -e "s,android-${ANDROIDVERSION}_r${ANDROIDREVISION},android-${NEWVER}_r${NEWREV},g;s,linaro_android_${ANDROIDVERSION},linaro_android_${NEWVER},g" *.xml
	git commit -as -m "manifest: Update to Android ${NEWVER}_r${NEWREV}"
	git push gerrit linaro_android_${NEWVER}
	git fetch --all
	git branch --set-upstream --track linaro_android_$NEWVER origin/linaro_android_$NEWVER
	git pull
else
	sed -i -e "s,android-${ANDROIDVERSION}_r${ANDROIDREVISION},android-${NEWVER}_r${NEWREV},g" *.xml
	git commit -as -m "manifest: Pull from android-${NEWVER}_r${NEWREV}"
	git push gerrit linaro_android_${ANDROIDVERSION}
fi
# And the script configs, given we've just moved to a new branch
[ "$ANDROIDVERSION" != "$NEWVER" ] && sed -i -e "s,^ANDROIDVERSION=.*,ANDROIDVERSION=$NEWVER," $SCRIPTS/settings
[ "$ANDROIDREVISION" != "$NEWREV" ] && sed -i -e "s,^ANDROIDVERSION=.*,ANDROIDVERSION=$NEWVER," $SCRIPTS/settings
# Done, now tell the user how it went
if [ -e /tmp/newbranch.list ]; then
	echo "New linaro_android_$NEWVER branches created in:"
	cat /tmp/newbranch.list
	echo
fi
if [ -e /tmp/merge.list ]; then
	echo "android-${NEWVER}_r$NEWREV merged into existing branches in:"
	cat /tmp/merge.list
	echo
fi
if [ -e /tmp/commit-id.list ]; then
	echo "The following projects are checked out by commit ID, make sure the manifest"
	echo "is updated with the commit IDs for ${NEWVER}_r${NEWREV}:"
	cat /tmp/commit-id.list
	echo
fi
if [ -e /tmp/trouble.list ]; then
	echo "Automatic merges failed in:"
	cat /tmp/trouble.list
fi
rm -f /tmp/newbranch.list /tmp/merge.list /tmp/trouble.list /tmp/commit-id.list
echo
echo "Don't forget to update the kernel revision for Nexus devices."
echo
echo "Don't forget to check for additions/removals in the manifest:"
echo "cd $SRC/platform/manifest"
echo "git diff android-${ANDROIDVERSION}_r${ANDROIDREVISION}..android-${NEWVER}_r${NEWREV} default.xml"
echo "(Those changes will typically have to be merged into each manifest file manually)"