Yea we never had it for even all Google controlled repos, just the ones that would work with us to get compilation units from their build system.
I was the last one to try (and fail) at getting arbitrary repos to extract and index in Kythe. We never found a good solution to get the set of particular insanity that is Kythe extraction working with random repos, each with their own separate insane build configs.
It almost makes me wonder if the right approach (had Google been willing to invest in it) would have been to wed Kythe and Bazel to solve that "insane build configs" problem.
"Okay, you want generic search? Great. Here's the specific build toolchain that works with it. We'll get around to other build toolchains... Eventually maybe."
Would have been a great synergy opportunity to widen adoption of Bazel.
I was the last one to try (and fail) at getting arbitrary repos to extract and index in Kythe. We never found a good solution to get the set of particular insanity that is Kythe extraction working with random repos, each with their own separate insane build configs.