Bulk-upgrade WordPress plugins using WP-CLI, committing each upgrade to Git as we go

gistfile1.sh

#! /bin/bash

# Find available updates for WordPress plugins via WP-CLI, then upgrade theme one at a time.
# After each upgrade, commit the changed files to Git.
#
# Requires that WP-CLI be installed and in your path: http://wp-cli.org/
#
# Currently, it will only work when run from the root of the WordPress installation, and has
# a hard-coded path for wp-content/plugins.
#
# Forgive the *awful* bash scripting, it could certainly use work :)

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
    # Output from `wp plugin list` includes headers - this will skip them
    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"
}