如何使用Dep Go依赖工具将本地同级项目导入供应商？

Question

1. 上图显示了GOPATH的代码组织。
2. 没有远程存储库，Dep无法工作吗？
3. 在S2/bar/main.go内，我有一个import语句并引用了"github.com/go/S1/proto"
S2项目中的
4. $ dep init出现以下错误

    init failed: unable to solve the dependency graph: Solving failure:
    (1) failed to list versions for https://github.com/go/S1: remote: Repository not found.
fatal: repository 'https://github.com/go/S1/' not found
: exit status 128
    (2) failed to list versions for ssh://git@github.com/go/S1: ERROR: Repository not found.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
: exit status 128
    (3) failed to list versions for git://github.com/go/S1: fatal: remote error:
  Repository not found.
: exit status 128
    (4) failed to list versions for http://github.com/go/S1: remote: Repository not found.
fatal: repository 'https://github.com/go/S1/' not found
: exit status 128