win：
打开你的 PowerShell 并执行
env:GO111MODULE ="on"
env:GOPROXY ="https://goproxy.cn"
管理员方式打开cmd
cd gopath 手动go get,重启vs即可看到代码提示：
go get github.com/mdempsky/gocode
go get github.com/uudashr/gopkgs/v2/cmd/gopkgs
go get github.com/ramya-rao-a/go-outline
go get github.com/acroca/go-symbols
go get golang.org/x/tools/cmd/guru
go get golang.org/x/tools/cmd/gorename
go get github.com/cweill/gotests/...
go get github.com/fatih/gomodifytags
go get github.com/josharian/impl
go get github.com/davidrjenni/reftools/cmd/fillstruct
go get github.com/haya14busa/goplay/cmd/goplay
go get github.com/godoctor/godoctor
go get github.com/go-delve/delve/cmd/dlv
go get github.com/stamblerre/gocode
go get github.com/zmb3/gogetdoc
go get golang.org/x/tools/cmd/goimports
go get golang.org/x/lint/golint
go get golang.org/x/tools/gopls
Mac 下终端命令，然后执行上面的go get
go env -w GO111MODULE=on
go env -w GOPROXY=https://goproxy.cn
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