[drupal config:export] Support core setting config_exclude_modules

[mariacha]

Problem/Motivation

• With Drupal 8.8 the example local settings file has a suggested option to exclude exporting certain config. See this documentation: https://www.drupal.org/docs/configuration-management/development-modules-excluded-from-configuration-management

But the command drupal config:export does not honor that setting.

How to reproduce

1. Enable a module, like devel on your local site.
2. Add the devel module to the list of excluded configuration in your settings.local.php file:

$settings['config_exclude_modules'] = ['devel'];

3. Export your site's config using drush>10 with drush cex OR using the admin interface at /admin/config/development/configuration/full/export. You should not have any devel.settings.yml files, and your core.extension.yml file should not reference the devel module.

4. Now run drupal config:export.

5. Notice that there is now a devel.settings.yml file (among other devel files), and your core.extension.yml lists devel as a module.

Solution

Drush added support for this to the 10.rc-3 version with this commit: drush-ops/drush@11cc24b. It looks like the magic is in an additional call with a parameter in the service, but I don't know how translatable that is to the drupal console:
drush-ops/drush@11cc24b#diff-688fa7217de68ca8060c51c10c1cd249R6

[bircher]

The magic was added to drush here: drush-ops/drush#4061
when exporting simply use the export storage and when importing use the import transformer to transform the storage before passing it on to the config importer.
See also: https://www.drupal.org/node/3037022 and https://www.drupal.org/node/3066005#invoking-transformer