Introduction

This guide will show you how to migrate a site that meets the following criteria to the latest version of Drupal:

If this is not your scenario, see Drupal Migration Guides for additional upgrade paths.

Requirements

Confirm that your site meets the following requirements before you continue:

• Ensure your site has the Pantheon drupal-composer-managed repository in its upstream.

  • Use Terminus to confirm the drupal-composer-managed Upstream

    Run the command terminus site:info $SITE to display the site's basic information and properties.

    The following is an abridged example of the output for a site upstream set to drupal-composer-managed:

    terminus site:info $SITE
    
    ------------------ -------------------------------------------------------------------------------------
    ID                 abdc3ea1-fe0b-1234-9c9f-3cxeAA123f88
    Name               anita-drupal
    Label              AnitaDrupal
    Created            2019-12-02 18:28:14
    Framework          drupal8
    ...
    Upstream           897fdf15-992e-4fa1-beab-89e2b5027e03: https://github.com/pantheon-upstreams/drupal-composer-managed.git...
    ------------------ -------------------------------------------------------------------------------------

    The following values indicate that a site is using a drupal-composer-managed upstream:

    • The Framework is drupal8

    • The Upstream includes https://github.com/pantheon-upstreams/drupal-composer-managed.git

• You are able to create a new Drupal site using Terminus Build Tools

More Resources

• Composer Fundamentals and Workflows