Fetch upstrem master and rebase

fetch_upstream_master_and_rebase.sh

#!/bin/bash
# vim: set ts=4 sw=4 noet:

# get current checked out branch
B=`git rev-parse --abbrev-ref HEAD`
if [ $? -ne 0 ]; then # problem, likely not a git repo
    exit -1           # leave whatever error occurred alone
fi

# sync from the upstream origin
git fetch upstream

# switch to master, if we aren't already there
if [ $B != "master" ]; then
    git co master
fi

git pull --rebase upstream master || exit -1

# switch back and rebase, if we didn't have master checked out
if [ $B != "master" ]; then
    git co $B
    git rebase master $B
fi