CODEWITHSUNDEEP
gitgo
Elliot Chance
Elliot Chance

Reputation: 5746

Is it possible to get the git tag with "go get"?

I would like to add a --version option to my Go binary, c2go.

I know traditionally this would be hardcoded into the binary but since it's alpha quality software and it's being updated very often I'd like to capture the version when the go get builds the executable (from the git tag).

Is this possible?

Upvotes: 1

Views: 1270

Answers (2)

Ralph
Ralph

Reputation: 32294

This does not exactly answer your question, but the way I solved a similar need is the following.

In my main package, I define the following variables:

var (
    buildInfo  string
    buildStamp = "No BuildStamp provided"
    gitHash    = "No GitHash provided"
    version    = "No Version provided"
)

and in my main function, I execute the following code:

if buildInfo != "" {
    parts := strings.Split(buildInfo, "|")
    if len(parts) >= 3 {
        buildStamp = parts[0]
        gitHash = parts[1]
        version = parts[2]
    }
}

I then build my application with the following bash (Linux) shell script:

#!/bin/sh

cd "${0%/*}"

buildInfo="`date -u '+%Y-%m-%dT%TZ'`|`git describe --always --long`|`git tag | tail -1`"
go build -ldflags "-X main.buildInfo=${buildInfo} -s -w" ./cmd/...

You will need to adjust the script for Windows and MacOS.

Hope that helps.

Upvotes: 2

Volker
Volker

Reputation: 42431

No this is not possible. (Note that go get supports other SCM than git too).

Upvotes: 0

Related Questions