Eclipse not starting after deletion of my .p2 folder

After some Maven build failures few days ago, I had the very bad idea to delete my .m2 and .p2 folders in my user data. Now I cannot start Eclipse anymore due to missing things in my .p2 folder !
I suppose I have to do a new Eclipse install ?
Is it possible when installing Eclipse to avoid the part that will get the sources in the git directory (because of course I already have all this done) ?

I finally run a full install in a new directory and then replace the git folder by my old one.