A Bash function that updates Sublime Text packages which aren't under package control, and have git repositories.

update-sublime-packages.sh

# update all non-sublime package control packages (osx)
function update_sublimetext_packages()
{
    echo ""
    echo "==> Updating Sublime Text Packages"
    echo ""

    local cwd=$(pwd)
    local subl_pkgs_dir=~/Library/Application\ Support/Sublime\ Text\ 3/Packages
    local repo=

    cd "${subl_pkgs_dir}"

    find . -name '.git' -type d -maxdepth 2 -print0 | while read -d $'\0' repository;
    do
        repo=`dirname "${repository}"`
        echo -e -n "- \033[0;32m`basename "${repo}"`\033[0m: "
        cd "${repo}" && git pull 2>/dev/null
        if [ $? -ne 0 ]; then
            echo -e "\nERROR pulling from: \033[0;31m`basename "${repo}"`\033[0m"
            echo "Aborting!"
            cd "${cwd}"
            return
        fi
    done
    
    cd "${cwd}"
    
    echo ""
    echo "Done."
    echo ""
}