Make use of the race detector

[typeless]

The race detector is helpful for discovering race conditions in concurrent programs. The easiest way I can think of is to add a new target or some kind of env. variable in the Makefile to enabe -race. We could also begin running try.gitea.io with the race detector enabled.

Edit:this is not just a proposal, but also a call for ideas about how we are going to do it.

[tboerger]

An env variable which is enabled on the ci makes sense

[strk]

How about GOFLAGS ?

[typeless]

@strk I don't understand how to apply GOFLAGS to the Makefile. Can you elaborate?

I submitted a PR for it.

[strk]

Yes, I meant something like that. I'm not sure $(GOFLAGS) would expand to the env variable, give it a try. If it doesn't work, try ${GOFLAGS}