hook_entity_info() renamed to hook_entity_type_build(), hook_entity_info_alter() to hook_entity_type_alter()

entity_info hooks have been renamed following the introduction of EntityType as a domain object.

• hook_entity_info has been renamed to hook_entity_type_build
• hook_entity_info_alter has been renamed to hook_entity_type_alter

7.x

function mymodule_entity_info_alter(&$entity_info) {
  $entity_info['node']['label callback'] = 'my_module_label_callback';
}

8.x
Use hook_entity_type_build() to add definitions to entity types. Use hook_entity_type_alter() to change entity definitions or to set default values.

function mymodule_entity_type_build(array &$entity_types) {
  /** @var $entity_types \Drupal\Core\Entity\EntityTypeInterface[] */
  // Add a form controller for a custom node form without overriding the default
  // node form. To override the default node form, use hook_entity_type_alter().
  $entity_types['node']->setFormClass('mymodule_foo', 'Drupal\mymodule\NodeFooFormController');
}

function mymodule_entity_type_alter(array &$entity_types) {
  /* @var $entity_types \Drupal\Core\Entity\EntityTypeInterface[] */
  $entity_types['node']->setLabelCallback('my_module_label_callback');
}