Upgrade WordPress plugins via WP-CLI one at a time, committing the results to Git as you go

.bash_profile

function wp-upgrade-plugins() {
  UPDATES=`wp plugin list --update=available --fields=name,title,update_version --format=csv`
  i=1

  while IFS="," read -r slug name version
  do
    test $i -eq 1 && ((i=i+1)) && continue

    echo "Upgrading $name to $version..."

    wp plugin update $slug &&
      git add -A wp-content/plugins/$slug &&
      git commit -m "Upgraded $name to $version"
  done <<< "$UPDATES"
}