Toradex Easy Installer, adding data.ext4 to the tezi image

I’m using the Toradex esay installer to provision my colibri-imx6.

I want to place an additional partition in the eMMC, the ‘source’ for this partition is available as ‘data.ext4’.

Which definitions need to be added to the image.json file?

(Or is it only possible to create partitions from files / tar’s?

The following article shows how you can tweak the image.json file to your needs:
You’ll want to look under the configuration tab.

I don’t think the source needs to necessarily be a file/tar. But you might need to experiment a bit to get the desired behavior.