update utility script to update current sdk, system sdk, support libraries.
diff --git a/update_current.sh b/update_current.sh
new file mode 100755
index 0000000..80ae2ba
--- /dev/null
+++ b/update_current.sh
@@ -0,0 +1,113 @@
+#!/bin/bash
+
+set -e
+
+usage() {
+
+cat <<EOF
+ $0
+ --sdk <SDK file path>
+ --system <system sdk file path>
+ --support <support library file path>
+EOF
+ exit 2
+
+}
+
+banner() {
+ echo "**************************************************"
+ echo "Updating $1 "
+ echo "**************************************************"
+}
+
+update_sdk() {
+ if [ -f "$SDK" ]
+ then
+ banner "SDK"
+ cd $ROOT_DIR/current
+ rm -f android.jar uiautomator.jar framework.aidl
+ unzip -j $SDK */android.jar */uiautomator.jar */framework.aidl
+ fi
+}
+
+update_system_sdk() {
+ if [ -f "$SYSTEM_SDK" ]
+ then
+ banner "system SDK"
+ cp -f $SYSTEM_SDK $ROOT_DIR/system_current/android.jar
+ fi
+}
+
+update_support_lib() {
+ if [ -f "$SUPPORT" ]
+ then
+ banner "support library"
+ rm -rf $ROOT_DIR/current/support/
+ unzip $SUPPORT >/dev/null
+
+ # Remove duplicates
+ rm -f support/v7/appcompat/libs/android-support-v4.jar
+ rm -f support/multidex/instrumentation/libs/android-support-multidex.jar
+
+ # Remove samples
+ rm -rf support/samples
+
+ # Remove source files
+ find support -name "*.java" \
+ -o -name "*.aidl" \
+ -o -name AndroidManifest.xml \
+ | xargs rm
+
+ # Other misc files we don't need
+ find support -name "*.gradle" \
+ -o -name ".classpath" \
+ -o -name ".project" \
+ -o -name "project.properties" \
+ -o -name "source.properties" \
+ -o -name ".readme" \
+ -o -name "README.txt" \
+ -o -name "package.html" \
+ -o -name "NOTICE.txt" \
+ | xargs rm
+
+ # Now we can remove empty dirs
+ find . -type d -empty -delete
+ fi
+}
+
+main() {
+ while [ "$#" -gt 0 ]
+ do
+ case "$1" in
+ --help|-h)
+ usage
+ ;;
+ --sdk)
+ export SDK="$2"
+ shift; shift
+ ;;
+ --system)
+ export SYSTEM_SDK="$2"
+ shift; shift
+ ;;
+ --support)
+ export SUPPORT="$2"
+ shift; shift
+ ;;
+ -*)
+ usage
+ ;;
+ *)
+ break
+ ;;
+ esac
+ done
+
+ ROOT_DIR=$(realpath $(dirname $0))
+
+ update_sdk
+ update_system_sdk
+ update_support_lib
+}
+
+main $*