cookbook upload widget for osx does a background upload and then notifies

dev_upload_cookbook.sh

#!/usr/bin/env bash

if [ "$(which terminal-notifier | wc -l)" == "0" ] ; then
    echo "requires terminal-notifier gem"
    exit 1
fi

COOKBOOK=$1
VERSION=$2

function msg {
    MSG="$1"
    SOUND="$2"
    if [ "${VERSION}" == "" ] ; then
        C_NAME="${COOKBOOK}"
    else
        C_NAME="${COOKBOOK}@${VERSION}"
    fi
    terminal-notifier -message "${MSG}" -title "Cookbook Upload Status" -subtitle "${COOKBOOK}" -sound $SOUND
}

function upload {
    if [ "$VERSION" == "" ] ; then
        knife cookbook delete -y $COOKBOOK
    else
        knife cookbook delete -y $COOKBOOK $VERSION
    fi && \
        berks upload
    if [ "$?" == "0" ] ; then
        msg "success" "Purr"
    else
        msg "failed" "Sosumi"
    fi
}
OWD=$(pwd)
cd "${HOME}/src/${COOKBOOK}-cookbook"
upload &> /dev/null &
cd $OWD