Simple bash script for updating Drupal 10 to Drupal 11

updateDrupal10LatestToDrupal11.sh

#!/bin/bash

# License: Eclipse Public License - v 2.0 (https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.html)
# Updated on May 26, 2026


#------------------------------------------------------------------------------
function yesNoContinue {

  echo -e
  read -n 1 -p "Continue? (y/n): " choice
  if [[ ! "$choice" =~ ^[Yy]$ ]]; then
    echo -e "\nStopping script. . . .\n"
    exit 1
  fi

}

#------------------------------------------------------------------------------
function checkThemes {

  echo -e "\n\nChecking for Adminimal theme which will not be ready for Drupal 11 in the near future."
  echo -e "  We recommend using the Gin Admin Theme found at"
  echo -e "  https://www.drupal.org/project/gin\n\n"

  results=$(composer show -N drupal/adminimal*)"\n"$(composer show -N drupal/seven*) 

  if [[ "${results}" == *"drupal"* ]]; then 
    echo -e "${results}\n\n"
    echo -e "Uninstall the following themes in the following order from the web GUI:\n"
    echo -e "   Adminimal Child Theme"
    echo -e "   Adminimal Theme"
    echo -e "   Seven Theme"
    echo -e
    echo -e "Now from the command line, run the following:\n"

    echo -e "   composer remove drupal/adminimal_theme"
    echo -e "      which should remove both adminimal_theme and the seven theme"
    
    echo -e "   rm -rf ./themes/custom/adminimal_child/"
    echo -e "      as it wasn't installed using composer."

    echo -e "\n\nNow exiting so that you may resolve the above issues.\n\n"

    exit 1
    
  else
    echo -e "\nThe Adminimal-related themes have been removed.\n\n"
  fi

}

#------------------------------------------------------------------------------

declare -r VENDOR_BIN_FOLDER="./vendor/bin"
declare -r DRUSH="${VENDOR_BIN_FOLDER}/drush"

"${DRUSH}" status

checkThemes

composer outdated "drupal/*"

yesNoContinue

#**********************

echo -e "Removing other themes"
"${DRUSH}" theme:uninstall bartik -y
composer remove drupal/bartik

echo -e "Removing devel module"
"${DRUSH}" pm-uninstall devel -y
composer remove drupal/devel

echo -e "Removing other modules"
"${DRUSH}" pm-uninstall color -y
composer remove drupal/color

"${DRUSH}" pm-uninstall js_cookie -y
composer remove drupal/js_cookie

"${DRUSH}" pm-uninstall quickedit -y
composer remove drupal/quickedit

"${DRUSH}" pm-uninstall rdf -y
composer remove drupal/rdf

"${DRUSH}" pm-uninstall legacy-project -y
composer remove drupal/legacy-project

echo -e "Installing drush 13"
composer require 'drush/drush:^13'

chmod +x ./vendor/bin/*
chmod +x ./vendor/drush/drush/drush

echo -e "\n\nShowing outdated status\n\n"
composer outdated "drupal/*"

echo -e "\n\nShowing composer why-not status\n\n"
composer why-not drupal/core 11.3

yesNoContinue

#**********************

chmod u+w ./sites/default
chmod u+w ./sites/default/*settings.php
chmod u+w ./sites/default/*services.yml

composer clear-cache

# Need to update from 4.1 (Works with Drupal: ^10.3 || ^11 <11.2)
# to
# 5.0.12 (Works with Drupal: ^11.2)
composer require 'drupal/gin:^5.0' --no-update

composer require 'drupal/core-recommended:^11' 'drupal/core-composer-scaffold:^11' 'drupal/core-project-message:^11' --no-update

composer remove drupal/core --no-update

composer update --dry-run --with-all-dependencies

echo -e "\n\nCompleted: composer update --dry-run\n\n"
yesNoContinue

#**********************

composer update --with-all-dependencies 
composer install

"${DRUSH}" cr
"${DRUSH}" updatedb:status
"${DRUSH}" updatedb -y


echo -e "\n\nCompleted: If you get errors about legacy modules or themes, simply reinstall, then uninstall using drush, then remove using composer.\n"
echo -e "For example, the bartik theme or drupal/tour\n"
echo -e "\nAnd by removing the warnings about the modules/themes, database warnings disappear.\n\n"

echo -e "\n\nNow run drupal-refresh.sh with -all option, which can be found in https://gist.github.com/efann\n\n"
echo -e "\n\nWhen launching the website, if you get weird errors like TypeError: Cannot assign Symfony\Component\HttpFoundation\ParameterBag to property..."
echo -e "Consider the solution found at https://www.drupal.org/project/bootstrap/issues/3522678"
echo -e "  drush sql-query \"SELECT * FROM key_value_expire WHERE collection LIKE 'theme:%:http';\""
echo -e "  drush sql-query \"DELETE FROM key_value_expire WHERE collection LIKE 'theme:%:http';\""