--deps-only

[mroch]

I'd like to bundle all of the dependencies of my local opam file, without actually including that package, to generate a bundle that can be cached by CI and used to test the local package.

so, something like opam-bundle --deps-only foo@file:///.../foo.opam bar@file:///.../bar.opam

the --deps-only name parallels the opam install --deps-only flag.