eck-8.x-1.x-dev/migrations/d7_eck.yml

# This is a follow-up migration so that all the ECK entity types exist when
# the deriver is executed. For custom migration, it's not necessary if
# destination entity type already exists.
# @see \Drupal\eck\Plugin\migrate\D7EckType::generateFollowUpMigrations().
id: d7_eck
label: ECK Entities
migration_tags:
  - Drupal 7
  - Content
  - Follow-up migration
deriver: Drupal\eck\Plugin\migrate\D7EckDeriver
source:
  plugin: d7_eck_entity
process:
  # If you are using this file to build a custom migration consider removing
  # id field to allow incremental migrations.
  id: id
  title: title
  langcode:
    plugin: default_value
    source: language
    default_value: 'und'
# The destination plugin is provided via D7EckDeriver.
# If you are using this file to build a custom migration you
# should configure the destination plugin. If the destination
# entity type id is foo, then the destination plugin
# should be eck:foo.
migration_dependencies:
  required:
    - d7_eck_type
    - d7_eck_bundle
  optional:
    - d7_field_instance