Add changelog tool to get an overview of changes between releases

Signed-off-by: Bernhard Rosenkränzer <Bernhard.Rosenkranzer@linaro.org>
diff --git a/changelog b/changelog
new file mode 100755
index 0000000..2067ff2
--- /dev/null
+++ b/changelog
@@ -0,0 +1,55 @@
+#!/bin/sh
+. `dirname $0`/common
+[ -d platform/manifest ] || lco platform/manifest
+
+OLDVER=$1
+if [ -n "$2" ]; then
+	NEWVER=$2
+else
+	NEWVER=${ANDROIDVERSION}_r${ANDROIDREVISION}
+fi
+if ! echo $OLDVER |grep -q r; then
+	OLDVER="${OLDVER}_r1"
+fi
+if ! echo $NEWVER |grep -q r; then
+	NEWVER="${NEWVER}_r1"
+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/changes.list
+xmllint --format $MANIFEST |grep '<project' | while read r; do
+	name="`echo $r |sed -e 's,.* name=\",,;s,\".*,,'`"
+	rev=""
+	if echo $r |grep -q " revision=\""; then
+		rev="`echo $r |sed -e 's,.* revision=\",,;s,\".*,,'`"
+	else
+		rev="$defaultrev"
+	fi
+	lco $name $rev
+	cd $SRC/$name
+	git diff android-${OLDVER}..android-${NEWVER} >/tmp/changes.diff
+	if [ -s /tmp/changes.diff ]; then
+		echo $name >>/tmp/changes.list
+	fi
+done
+clear
+if [ -e /tmp/changes.list ]; then
+	echo "Changes affect:"
+	cat /tmp/changes.list |while read r; do
+		echo "*** $r: ***"
+		pushd $SRC/$r
+		PAGER=cat git log --oneline android-${OLDVER}..android-${NEWVER}
+		popd
+	done
+else
+	echo "No changes"
+fi
+rm -f /tmp/changes.list /tmp/changes.diff