About a year ago the dune team discussed in passing making such a migration helper. But even back then, there wasn’t that many packages with a > 0 number of users that still used oasis. Now such a tool seems even less useful.
I second that, I think a lot of users of Oasis (including me) made the
jump to dune a while ago. If one of my repos still uses oasis it means I
don’t really use it (but I’d still migrate it manually if requested).
Regardless, I welcome the deprecation and I’d like to thank oasis and its team of devs for a great tool that helped me a lot over the years.
Same, oasis was a good tool for having multiple sub-libraries and
executables. Dune is just a much more refined, code-gen-free, faster,
and cleaner tool for the same kind of project. So thanks to both teams!