C++ indexer depends on @rust_linux_x86_64//:rustc_lib

[ivan444]

Hi!

Our CI (at https://github.com/chipsalliance/verible; Bazel based) is running Kythe C++ indexer to update our project at http://cs.opensource.google .

The CI downloads Kythe release and does Bazel build with extractors.bazelrc, which now fails as we hit runtime dependency on @rust_linux_x86_64//:rustc_lib.

Could you make that dependency optional? I.e. only when processing rust code?

Our workaround is to fork extractors.bazelrc and drop the languages we don't care about. Works, but it's a bit fragile.

[shahms]

Yes; the C++ indexer should not depend on Rust.

[shahms]

I think the issue may be that we just run build with all of the known extractors in extractrors.bazelrc

I'm not sure there's an easy way around that and may require a bit of work (if that's the cause)

[ivan444]

Yep, the issue is that extractors.bazelrc adds all known extractors to build.

A simple solution is to change the instructions:

• Create slimmer bazelrc (no language specific --experimental_action_listeners)
• Tell people to manually add --experimental_action_listener= to their bazel invocation