无法通过`go get`检索到的测试依赖项

Question

I'm using Golang (1.9 at this time), and using GitLab CI to test and build binaries and Docker containers.

For some projects, I run into this issue (GitLab CI output):

$ go get
$ go get -u github.com/golang/lint/golint
$ go tool vet -composites=false -shadow=true *.go
$ golint ./...
$ go test --race $(go list ./... | grep -v /vendor/)
# gitlab.my.site/core/proj/mypkg mypkg/mypkg_test.go:18:2: cannot find package 
"gitlab.my.site/core/otherproj/otherpkg" in any of:
/usr/local/go/src/gitlab.my.site/core/otherproj/otherpkg (from $GOROOT)
    /go/src/gitlab.my.site/core/otherproj/otherpkg (from $GOPATH)
FAIL    gitlab.my.site/core/proj/mypkg [setup failed]

The core/otherproj project is private, but clonable through SSH, which is my current workaround.

My main problem is that private projects in dependencies most often work, but sometimes, go getting them consistently fails.

Worth noting is that the otherproj/otherpkg is only a dependency in the test for proj/mypkg; not its primary functionality.

My question is; why does this specific dependency not download from go get, and how do I make it download?

Thanks.

Answer 1

From the docs (also available via go get --help):

The -t flag instructs get to also download the packages required to build the tests for the specified packages.

So you need to run go get -t to download test dependencies.