Change migration include plugins to use single YAML file per plugin

Does this only break it up within the current module, or can it be made so that we can reference different module's shared migration file(s)? Would be nice to have cross-module migration shared yml files (like a family of sub modules where the parent module has a common set of migrations, and the sub modules that each deal with different parts of the migration have more specific shared migration).

> Does this only break it up within the current module, or can it be made so that we can reference different module's shared migration file

The migration includes are merely plugins -- you can reference any plugin of that type in any migration. That's already the case with the current code.

So cross-module use of the shared_configuration YAML data is possible w/o this patch? Like so:

/my-migrations
--/modules
--/--/node_migration
--/--/--/node_migration.migrate_shared_configuration.yml (with a "defaults" include definition)
--/--/term_migration
--/--/--/term_migration.migrate_shared_configuration.yml (with a "taxonomy" include definition)
--/--/misc_migration
--/--/--/migrations
--/--/--/--/misc_migration.yaml (with contents below)

# Misc Migration
id: misc_migration
includes:
  - defaults
  - taxonomy
source: ...

?

AFAICT, yes. I had a quick look in the code of MigrateIncludeHandler and it's not doing any doctoring to the 'include' value.

It would be nice if you could still group multiple inside a single YML file, especially when you have multiple override "snippets" that are only a few lines -- creating a separate file for all of them is a bit overwhelming.

defaults.yml
- include1:
-   source:
-     constants:
-       a: 1
- include2:
-   source:
-     constants:
-       b: 2
- include3:
-   source:
-     constants:
-       c: 3

big_complex_field.yml
- process:
-   field_paragraphs:
-      plugin: ...   

Also, sub-folders under migrate_shared_configuration/ would be nice:

- migrate_shared_configuration/node/bundle_1.yml
- migrate_shared_configuration/node/bundle_2.yml
- migrate_shared_configuration/term/vocab_1.yml

Nice addition.

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