git ship command, see http://object.io/site/2010/12/hack-and-ship/

ship.sh

#!/bin/sh -x
# Exit if any error is encountered:
set -o errexit
# git name-rev is fail
CURRENT=`git branch | grep '\*' | awk '{print $2}'`
git checkout master
git merge ${CURRENT}
git push origin master
git checkout ${CURRENT}