Magento 2: Is there a way to use the include command into the di.xml?

Question

Is there a way to merge multiple di.xml files into one main di.xml configuration file?

I would like to split a big di.xml file into five different files. I have seen the include command in the system.xml file into the PayPal module and I am curious to know if I can split the di.xml file too.

Look at:

https://github.com/magento/magento2/blob/develop/app/code/Magento/Paypal/etc/adminhtml/system.xml#L40-L43

Answer 1

You cannot split the di.xml file inside a module into multiple parts other than the ones supported by Magento.
All you have to work with is:

• etc/di.xml - the main di file. Loaded everytime.
• etc/frontend/di.xml - loaded only on frontend
• etc/adminhtml/di.xml - loaded only on backend.

The include tag in the system.xml files works because it is interpreted when the system.xml files are interpreted. So it is system.xml specific.
There is nothing similar for di.xml files.