Move log quantity base field definition to farm_log_quantity module.

The farm_inventory module had an implicit dependency on this
field, so by moving this out to its own module we can depend
on it explicitly without adding a dependency on farm_entity
as a whole.

modules/core/entity/farm_entity.base_fields.inc

@@ -176,17 +176,6 @@ function farm_entity_log_base_fields() {
         'view' => -70,
       ],
     ],
-    'quantity' => [
-      'type' => 'entity_reference_revisions',
-      'label' => t('Quantity'),
-      'description' => t('Add quantity measurements to this log.'),
-      'target_type' => 'quantity',
-      'multiple' => TRUE,
-      'weight' => [
-        'form' => 0,
-        'view' => 0,
-      ],
-    ],
   ];
   $fields = [];
   foreach ($field_info as $name => $info) {

modules/core/entity/farm_entity.info.yml

@@ -21,6 +21,6 @@ dependencies:
   - farm:farm_id_tag
   - farm:farm_location
   - farm:farm_log_category
-  - farm:quantity
+  - farm:farm_log_quantity
   - log:log
   - token:token

modules/core/field/farm_field.info.yml

@@ -6,7 +6,6 @@ core_version_requirement: ^9
 dependencies:
   - drupal:field
   - entity:entity
-  - entity_reference_revisions:entity_reference_revisions
   - farm:farm_map
   - fraction:fraction
   - inline_entity_form:inline_entity_form

modules/core/inventory/farm_inventory.info.yml

@@ -7,5 +7,6 @@ dependencies:
   - drupal:options
   - farm:asset
   - farm:farm_field
+  - farm:farm_log_quantity
   - farm:quantity
   - fraction:fraction

modules/core/inventory/tests/src/Kernel/InventoryTest.php

@@ -33,10 +33,10 @@ class InventoryTest extends KernelTestBase {
     'farm_field',
     'farm_inventory',
     'farm_inventory_test',
+    'farm_log_quantity',
     'farm_quantity_standard',
     'farm_unit',
     'fraction',
-    'geofield',
     'log',
     'options',
     'quantity',

modules/core/log/quantity/farm_log_quantity.info.yml

@@ -0,0 +1,10 @@
+name: farmOS Log Quantity
+description: Adds a quantity reference field to logs.
+type: module
+package: farmOS
+core_version_requirement: ^9
+dependencies:
+  - entity_reference_revisions:entity_reference_revisions
+  - farm:farm_field
+  - farm:farm_log
+  - farm:quantity

modules/core/log/quantity/farm_log_quantity.module

@@ -0,0 +1,39 @@
+<?php
+
+/**
+ * @file
+ * Contains farm_log_quantity.module.
+ */
+
+use Drupal\Core\Entity\EntityTypeInterface;
+
+/**
+ * Implements hook_entity_base_field_info().
+ */
+function farm_log_quantity_entity_base_field_info(EntityTypeInterface $entity_type) {
+
+  // We only care about log entities.
+  if ($entity_type->id() != 'log') {
+    return [];
+  }
+
+  // Add a quantity reference field to logs.
+  $field_info = [
+    'quantity' => [
+      'type' => 'entity_reference_revisions',
+      'label' => t('Quantity'),
+      'description' => t('Add quantity measurements to this log.'),
+      'target_type' => 'quantity',
+      'multiple' => TRUE,
+      'weight' => [
+        'form' => 0,
+        'view' => 0,
+      ],
+    ],
+  ];
+  $fields = [];
+  foreach ($field_info as $name => $info) {
+    $fields[$name] = \Drupal::service('farm_field.factory')->baseFieldDefinition($info);
+  }
+  return $fields;
+}