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Last Reviewed: 2021-03-31

Upgrade a Site That Was Created With an Empty Upstream to the Latest Version of Drupal

Prepare

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  1. Review the documentation on Git, Composer, and Terminus, and install and configure them on your local computer. Pantheon requires Composer 2, at minimum.

    • Mac users can use Homebrew to install Git, Composer, and PHP, along with their required dependencies. Restart the shell or terminal environment after entering the following command:
    • Windows users can install Composer and Git, and may need to install XAMPP or similar to satisfy some dependencies.

  2. Set the temporary variable $SITE in your terminal session to match the name of your site.

    This doc uses several commands that use the temporary command line alias, $SITE, to make entering command examples easier. Refer to the steps further in this doc to see which sites should be aliased (it may be more than one), then replace anita-drupal in this example: