That is a neat looking caterpillar - if only it was not munching on your plants.
I had hoped to sow some eggplants this year, but never to it. I put 2 in the ground a month or so ago, but since I have never had prolific plants, I figure 2 was not going to be enough. So, I went out and bought a six-pack last week, potted them up to 4 inch pots and will put them in the ground in two weeks when they get a little bigger. I only grow the long Japanese variety now. Now that others are mentioning holes in their eggplant leaves, I do see that in mines too. But, I never saw any bugs on the leaves so I have never done anything,