List embedded dependencies in a Go binary

[Michel Casabianca]

Hi gophers,

I would like to know which dependencies are embedded in generated Go binary, along with their version. I though at first that they were listed in go.sum file, but it seems that this is not the case.

I found two different ways to do so:

- Running "go version -m my-binary"

- Calling runtime.debug API in my code, as follows:

func buildInfo() {

    buildInfo, ok := debug.ReadBuildInfo()

    if !ok {

        panic("Can't read BuildInfo")

    }

    fmt.Println("Dependencies:")

    for _, dep := range buildInfo.Deps {

        fmt.Printf(" %s %s\n", dep.Path, dep.Version)

    }

}

func main() {

    // print build info if -info passed on command line

    if len(os.Args) > 1 && os.Args[1] == "-info" {

        buildInfo()

        os.Exit(0)

    }

    ...

}

These two methods produce the same list. Does anyone confirm that this is the way to list embedded dependencies in a Go binary?

Another question related to this one:

Let's say I use dependencies A and B that both use C in two different versions. According to my own experience, it seems that Go will embed only one of these versions, the latest one. Is this correct?

Best regards

[jfcg...@gmail.com]

try "go version -m"