可惜原作者不再维护。
https://packagecontrol.io/packages/GoTools
Require:
go get -u -v github.com/nsf/gocode
go get -u -v github.com/rogpeppe/godef
go get -u -v golang.org/x/tools/cmd/goimports
go get -u -v golang.org/x/tools/cmd/oracle
go get -u -v golang.org/x/tools/cmd/gorename