Plan for Index Now 4.0

This issue tracks the plan for the 4.0 major release of the Index Now module.

Planned changes

• [x] Update module requirements: add Drupal 12 support, #3585644: Drop drupal 10 support
• [x] #3585637: Drop legacy hooks in favor of OOP hook implementations
• [x] #3585647: Remove deprecated methods and classes
• [x] #3585650: Move node and taxonomy term indexing into dedicated sub-modules (index_now_node, index_now_taxonomy), each with its own config object and schema
• [x] #3586081: Split index_now_commerce into index_now_commerce_product and index_now_commerce_store sub-modules to better match Drupal Commerce's structure, each with its own config object and schema:
  • index_now_commerce_product
  • index_now_commerce_store
• [x] #3586248: Clear entity indexer plugin cache on sub-module install/uninstall, so the settings form reflects the change without requiring a cache rebuild
• [x] #3586263: Update README and document the 3.x → 4.0 upgrade path
• [x] #3586267: Drop hard dependency on config_split from index_now.info.yml — the module does not use it programmatically; recommend it in the README instead for restricting the module to production environments
• [x] Simplify the Drush constraint in composer.json from ^12.0 | ^13.0 to ^13.0 — Drush 12 is no longer needed since Drupal 10 support has been dropped, and Drush 13 covers both Drupal 11 and 12
• [x] #3586312: Replace manual service wiring with autowire for services and Hook classes
• [x] #3586321: Replace manual service wiring with autowire for plugins
• [x] #3586346: Replace manual service wiring with autowire for Controller, Form, QueueWorker and Drush commands
• [x] #3586534: Add Rector dry-run job to the GitLab CI pipeline to surface deprecations early on merge requests
• [x] #3586683: Provide a way to set a custom base URL for the index (headless CMS) via a dedicated outbound path processor and a new $settings['index_now_base_url'] option
• [x] #3557839: Allow Users to alter URLs submitted to Index Now and Key Location URL via a new hook_index_now_url_alter() hook, allowing modules to modify URLs before they are
  submitted

Test coverage

• [x] #3587849: Add unit tests for Hook\EntityActions — covers hook_entity_insert(),
  hook_entity_update(), hook_entity_delete(), hook_path_alias_insert(), and
  hook_path_alias_update(); these hooks are the primary trigger for URL submission and are currently untested
• [x] #3587872: Add unit tests for IndexNowPathProcessor and IndexNowOutboundPathProcessor — inbound routing for the API key file and outbound URL rewriting are
  both exercised only indirectly through kernel tests
• [x] #3587896: Add unit tests for EntityIndexerManager — cover getIndexerForEntityType() and
  getIndexedEntityTypeIds() directly; the plugin manager is currently only touched as a side-effect of
  ModulesHooksTest

Configuration storage strategy: each sub-module will own its configuration object and schema. A hook_update_N will migrate existing values out of index_now.settings.

Drupal 12 compatibility will be added to the 3.1.x branch before the 4.0.x release.

Each item will be tracked in its own issue and linked here.