Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

core/modules/block_content/migration_templates/block_content_body_field.yml

@@ -0,0 +1,32 @@
+id: block_content_body_field
+label: Block content body field configuration
+migration_tags:
+  - Drupal 6
+  - Drupal 7
+source:
+  plugin: embedded_data
+  data_rows:
+    -
+      entity_type: block_content
+      bundle: basic
+      field_name: body
+      label: Body
+      display_summary: false
+  ids:
+    entity_type:
+      type: string
+    bundle:
+      type: string
+    field_name:
+      type: string
+process:
+  entity_type: entity_type
+  bundle: bundle
+  field_name: field_name
+  label: label
+  'settings/display_summary': display_summary
+destination:
+  plugin: entity:field_config
+migration_dependencies:
+  required:
+    - block_content_type

core/modules/block_content/migration_templates/block_content_type.yml

@@ -0,0 +1,19 @@
+id: block_content_type
+label: Block content type
+migration_tags:
+  - Drupal 6
+  - Drupal 7
+source:
+  plugin: embedded_data
+  data_rows:
+    -
+      id: basic
+      label: Basic
+  ids:
+    id:
+      type: string
+process:
+  id: id
+  label: label
+destination:
+  plugin: entity:block_content_type

core/modules/block_content/migration_templates/d6_block_content_body_field.yml

@@ -1,25 +0,0 @@
-id: d6_block_content_body_field
-label: Drupal 6 block content body field configuration
-migration_tags:
-  - Drupal 6
-source:
-  # We do an empty source and a proper destination to have an idmap for
-  # migration_dependencies.
-  plugin: md_empty
-  constants:
-    entity_type: block_content
-    bundle: basic
-    name: body
-    label: Body
-    display_summary: false
-process:
-  entity_type: 'constants/entity_type'
-  bundle: 'constants/bundle'
-  field_name: 'constants/name'
-  label: 'constants/label'
-  'settings/display_summary': 'constants/display_summary'
-destination:
-  plugin: entity:field_config
-migration_dependencies:
-  required:
-    - d6_block_content_type

core/modules/block_content/migration_templates/d6_block_content_type.yml

@@ -1,16 +0,0 @@
-id: d6_block_content_type
-label: Drupal 6 block content type
-migration_tags:
-  - Drupal 6
-source:
-  # We do an empty source and a proper destination to have an idmap for
-  # migration_dependencies.
-  plugin: md_empty
-  constants:
-    id: basic
-    label: Basic
-process:
-  id: 'constants/id'
-  label: 'constants/label'
-destination:
-  plugin: entity:block_content_type

core/modules/block_content/migration_templates/d6_custom_block.yml

@@ -1,5 +1,5 @@
 id: d6_custom_block
-label: Drupal 6 custom blocks
+label: Custom blocks
 migration_tags:
   - Drupal 6
 source:
@@ -21,4 +21,4 @@ destination:
 migration_dependencies:
   required:
     - d6_filter_format
-    - d6_block_content_body_field
+    - block_content_body_field

core/modules/block_content/migration_templates/d7_custom_block.yml

@@ -0,0 +1,24 @@
+id: d7_custom_block
+label: Custom blocks
+migration_tags:
+  - Drupal 7
+source:
+  plugin: d7_block_custom
+  constants:
+    type: basic
+process:
+  id: bid
+  type: 'constants/type'
+  info: info
+  'body/format':
+    plugin: migration
+    migration: d7_filter_format
+    source: format
+  'body/value': body
+destination:
+  plugin: entity:block_content
+  no_stub: true
+migration_dependencies:
+  required:
+    - d7_filter_format
+    - block_content_body_field