sync_upstream.sh

# git sync upstream
function gsu() {
    set -e

    UPSTREAM_CHECK=$(git remote -v | grep upstream || echo '')
    if [[ $UPSTREAM_CHECK == '' ]]
    then
        echo "NO UPSTREAM SET -- ABORTING"
        exit 1
    fi

    MASTER_CHECK=$(git status | grep 'On branch master' || echo '')
    if [[ $MASTER_CHECK == '' ]]
    then
        echo "NOT ON MASTER -- ABORTING"
        exit 1
    fi

    CLEAN_CHECK=$(git status | grep 'nothing to commit, working tree clean' || echo '')
    if [[ $CLEAN_CHECK == '' ]]
    then
        echo "BRANCH IS NOT CLEAN -- ABORTING"
        exit 1
    fi

    git fetch upstream
    git rebase upstream/master
    git push origin master
}