Go Modules 模式

$ go env
GO111MODULE="on"
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/test/.cache/go-build"
GOENV="/home/test/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/test/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/test/go"
GOPRIVATE=""
GOPROXY="https://goproxy.io,direct"
GOROOT="/opt/server/go/1.17.6"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/opt/go/1.17.6/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.17.6"
......