`--instrumentation_filter` does not work for scala coverage

[liucijus]

Repro: https://github.com/sjoerdvisscher/bazel-scala-tests
bazel coverage //... --instrumentation_filter=-java removes java, but
bazel coverage //... --instrumentation_filter=-scala has scala

Repro also demonstrates #1101

Thanks @sjoerdvisscher for reporting

[gergelyfabian]

Is there any workaround for this?

My workaround so far it to take the combined report and extract data from it with lcov -e to take only files that weren't tests.

[gergelyfabian]

Is cd556cc a fix for this bug?

[gergelyfabian]

After upgrading to the newest rules_scala (de3d3a7) instrumentation_filter seems to be working for my use-case (test targets are properly removed from the output).

[gergelyfabian]

https://github.com/sjoerdvisscher/bazel-scala-tests would need an update, it breaks when upgrading rules_scala to the newest version, so I could not check it there, but I believe it should be working when scala targets are excluded.