I'm trying to get a configurable product csv import working for Magento 2. (REST API is just too slow for any form of mass imports with 10,000+ items )
In the past we had Magmi that filled in all the gaps for mass loading product in relatively easily. We had to first load the color/size code and description to then be used in the simple product.
Magento 2 dosen't have an option for color or size CSV file loads, and when adding a new value, the product import it is failing. I thought maybe the new addition_attributes would be used but I can't find any documentation on it, or a method that works using it.
Any assistance would be greatly appreciated - Ideally we would like to use officially supported methods only without any 3rd party extensions, but if nothing is available then any free 3rd party tools could be considered.
