That Kaveri thingie had all it's more demanding components sourced from outside.
The first step, like that of china's, should have been making copies of the engines of mig21s which india has quite a number. Right at this moment, india still needs to import spare parts for the mig21 engines.
BTW, I seriously doubt the hindis airforce wants Kaveri to power their UAV beyond one or two prototypes for photo sessions