File migration: Try to bring remote public file if local file is not found

fjgarlin → credited danflanagan8 → .

fjgarlin → credited mikelutz → .

fjgarlin → credited p-andrei → .

Resources from that thread.

Migrate conditions: https://www.drupal.org/docs/8/api/migrate-api/migrate-process-plugins/pr... →

Snippet to check local, then remote:

source:
  constants:
    # Path changed via hook_migration_plugins_alter
    # and set via $config['drupalorg_migrate']['project_files']['source']
    source_base_path: '/var/www/html/web/files/d7-files'
    remote_base_path: 'https://drupal.org/sites/default/files'

process:
  local_temp_path:
    plugin: concat
    delimiter: /
    source:
      - constants/source_base_path
      - filepath
  local_full_path:
    -
      plugin: callback
      callable: file_exists
      source: '@local_temp_path'
    -
      plugin: skip_on_empty
      method: process
    -
      plugin: get
      source: '@local_temp_path'
  remote_full_path:
    -
      plugin: concat
      delimiter: /
      source:
        - constants/remote_base_path
        - filepath
    -
      plugin: urlencode
  source_full_path:
    -
      plugin: null_coalesce
      source:
        - '@local_full_path'
        - '@remote_full_path'
  uri:
    plugin: file_copy
    source:
      - '@source_full_path'
      - uri

Migration is running.
- I renamed the folder with the files so they wouldn't be found. Images were downloaded.
- I renamed it back and re-run the migration. Images were copied.

Thanks for the help here.

Automatically closed - issue fixed for 2 weeks with no activity.