Add service contract API to set system configuration values

[Vinai]

Before going through the work to create a PR, I wanted to ask if this feature maybe already is being developed internally.

More details:
Currently there is no service contract API to manage the system configuration in the core_config_data table.

I am aware of the \Magento\Store\Api\StoreConfigManagerInterface and \Magento\Store\Api\Data\StoreConfigInterface, but having a more generic interface to build extensions to help with deployment and provisioning of dev systems would be very useful.

Currently the only way to do that I have found was to use direct SQL inserts into the table, or use \Magento\Config\Model\Config directly. In addition to not being blessed with an @api annotation, the public interface isn't easy to use with the PHP array it uses.

What I would like to have in the to be added service contract API would be a data object with a scope, scope_id, path and value. And a repository to save and get them.

So if this isn't already part of an internal task and you think it is a good idea, please give me a go ahead.

[adragus-inviqa]

having a more generic interface to build extensions to help with deployment and provisioning of dev systems would be very useful

Could you give us some examples of that?

[Vinai]

Sure. For example, just a few days ago I would have liked to add a little command to bin/magento like

bin/magento system:config:set system/full_page_cache/caching_application 2 (enable varnish FPC)
I also was looking for a way to set sandbox values for payment modules on an integration host in a similar fashion.

Another useful application is setting system config values in setup scripts, so they are applied automatically with a module.
In Magento 1 there was \Mage_Core_Model_Resource_Setup::setConfigData(), but that didn't make it into Magento 2 it seems. At least none of the interfaces inheriting \Magento\Framework\Setup\SetupInterface have it.

[mazhalai]

@Vinai Thank you for reporting, we have created MAGETWO-51781 to investigate and fix.

[adragus-inviqa]

Is Magento\Framework\App\Config\Storage\WriterInterface of any help?

[Vinai]

@adragus-inviqa That interface would be perfect if it had a @api annotation. Thanks!

[andimov]

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Please feel free to reopen if it's needed.