cmd/go: go test -c does not accept -o $dir #58162

[Maksadbek]

Hi all,

The issue states that `go build` has allowed one to build multiple packages and write their executables to a directory, and `go test` should also implement the same behaviour.

I want to work on this feature, and my question is should the -o $dir flag generate one executable test file for all packages or multiple executables for each package ?

I've asked this question in the issue comments, but no answer. So I'm reposting it here.

Thanks,

Maksadbek

[Russ Cox]

Hi Maksadbek,

Thanks for working on that issue. 'go test -c' of multiple packages should build multiple test binaries, the same way 'go test' of multiple packages does. I assume the binaries should be named the same thing they would be named when using 'go test -c' of a single package, which is to say 'packagename.test[.exe]'. That means if you run 'go test -c math/rand crypto/rand' there should probably be an error reported about the conflict between two different rand.test. 'go build -o' of multiple commands also seems to be missing this check.

Thanks again!

Best,

Russ

 

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[Maksadbek]

Hi Russ,

Thank you for your response. I created a CL yesterday, https://go-review.googlesource.com/c/go/+/466397. It probably needs some fixes, i.e. amend the error message. Could you please review it ?

Thanks,

Maksadbek