Description of the problem / feature request:

Currently when using coverage all generated source files are ignored. The files neither show up in source file manifest nor do they have a baseline coverage. I would like to enable to get coverage for generated source files as this not currently possible.

Bugs: what's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

Have a generated source file as a source to a rule.

What operating system are you running Bazel on?

Ubuntu 19.10

What's the output of bazel info release?

release 3.1.0

Have you found anything relevant by searching the web?

No.