@jba Docker does not support every platform that Go supports and gets tested on. Is the scope of this feature request limited to a subset of GOOS/GOARCH pairs? For example, just linux/amd64 and potentially others?
If the target for the discovery site is always Docker, an alternative would be to configure a Cloud Build run to be able to publish Trybot results, rather than using the normal Trybots for this specific scenario.
Yep, I discussed this with Jonathan (thanks @jba for posting this issue). I think this might not be possible with the current Trybot implementation. For example, exposing Docker probably means exposing sudoless docker, which comes with a bunch of security concerns.
Another option might be to integrate TryBot functionality with other CI tooling, for example Cloud Build. TryBots have many nice features (e.g. gating on Run-Trybots +1) that could perhaps be separated from the actual CI.