Feature: #109340 - Include site configurations in import / export 

See forge#109340

Description 

The import/export module now supports the inclusion of site configurations that belong to exported page trees. Admin users can enable this via the Include site configurations for exported root pages checkbox in the Advanced options tab of the export module. This option is only available to admin users.

When enabled and a page tree belonging to a root page with a site configuration is exported, that configuration is embedded in the export file. On import, the site configuration is restored with the remapped root page UID.

During import, embedded site configurations are processed after all records have been written:

  • The rootPageId is remapped to the newly imported page UID.
  • If a site configuration already exists for the imported root page, the embedded configuration is skipped.
  • If the site identifier already exists but points to a different root page, a numeric suffix is appended (e.g. my-site-1) to avoid collisions.

The import preview screen shows embedded site configurations with their identifier, base URL, and the title of the associated root page.

The CLI export command supports the same feature using the --include-site-configurations option.

Impact 

Site configurations can now be preserved across export and import cycles. This simplifies the distribution of complete site packages and the migration of page trees between TYPO3 instances.