Remember this was 90s India, even China back then was inducting Su-30 MK (modern commercial ie export version) as it is in Su-30 MKK. India went on and identified which French and Israeli systems will work well with Su-30. India did the path breaking part of making Su-30 a true open architecture which was reused a lot by Russia in exporting to other customers. To put into cars perspective, India invented aftermarket customization for Su-30 which Russia is using to make money.
And it does not end here. They also developed a new super sonic anti ship/Land attack cruise missile (Brahmos ALCM). This fills the gap for Su 30 users due to low range of Kh-30 missile family. Russia herself and a quite a few countries are interested in it.
(OT)
This discussion will become OT so I will answer briefly. Please look at company results of JLR on wikipedia atleast 2009-16 and then comment. Doesn't matter which country the R&D centres sit. TATA has all their tech at their disposal and they are putting it to good use in Tata Bolt.
Simple reason, if they want to make money in India they will have to give blue prints. Otherwise we can buy from USA/Sweden/France etc without blueprint as well. Atleast their planes will not find way into China.
For our own jet, we are designing anyways, refer to AMCA. Having a blueprint and ToT will make it easier for us.
Mind you Russia also have stakes here. If they do not compromise, they might as well kiss their whole market goodbye as they will have less money to carry out R&D for future platforms. Remember, China is near or ahead of Russian level of R&D. Soon they will replace Russia in fighter jet and other arms export if Russians do not invest in their R&D.