The deploy command standardizes how Drupal deployments work. The intent is your deployment script updates the codebase for the target site and then this command performs the following:
drush updatedb --no-cache-clear drush cache:rebuild drush config:import drush cache:rebuild drush deploy:hook
Authoring update functions
Below are the 3 types of update functions run by this command. Choose the most appropriate for your need.
|HOOK_update_n()||Low level changes. Drupal API not allowed.|
|HOOK_post_update_NAME()||Drupal API allowed.|
|HOOK_deploy_NAME()||Runs after config is imported. Drupal API allowed.|
If you need to customize this command, you should use Drush configuration for the subcommands listed above (e.g. updatedb, config:import, etc.).