How Can I Retrieve Module Versions from Within Go Code?

Retrieving Module Versions from Within Go Code

The Go tooling includes module and dependency information within the compiled binary. Harnessing this feature, the runtime/debug.ReadBuildInfo() function presents a method to access this data while your application is executing. It furnishes an array containing dependency details, inclusive of module path and release number.

For each module or dependency, this array contains a debug.Module structure, detailed below:

type Module struct {
    Path    string  // module path
    Version string  // module version
    Sum     string  // checksum
    Replace *Module // replaced by this module
}

To exemplify this process:

package main

import (
    "fmt"
    "log"
    "runtime/debug"

    "github.com/icza/bitio"
)

func main() {
    _ = bitio.NewReader
    bi, ok := debug.ReadBuildInfo()
    if !ok {
        log.Printf("Failed to read build info")
        return
    }

    for _, dep := range bi.Deps {
        fmt.Printf("Dep: %+v\n", dep)
    }
}

When executed on the Go Playground, it yields the following output:

Dep: &{Path:github.com/icza/bitio Version:v1.0.0 Sum:h1:squ/m1SHyFeCA6+6Gyol1AxV9nmPPlJFT8c2vKdj3U8= Replace:<nil>}

Refer to the related question for further insights: How to acquire detailed Go build logs, along with all packages utilized in GOPATH and "go module" modes?

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