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【Golang】Gitコミットのrevision番号(commit id)を取得するには

Posted at

Go 1.18以降でBuildInfoを使う場合

BuildInfoのSettingsにある"vcs.revision"を取得。

main.go
package main

import (
	"fmt"
	"runtime/debug"
)

func main() {
	var rev string
	info, _ := debug.ReadBuildInfo()
	for _, s := range info.Settings {
		if s.Key == "vcs.revision" {
			rev = s.Value
		}
	 }
	fmt.Printf("revision: %s\n", rev)
}
$ go mod init sample 
$ git init && git add . && git commit -m 'initial commit'
$ go build . && ./sample
revision: bd486152ad205a33a1ec87c1122e3e20bda577aa

Go 1.18より前でBuildInfoを使わない場合

Gitコマンドを叩き、CombinedOutputで標準出力を取得。.gitディレクトリがあれば取得できます。

main.go
package main

import (
	"fmt"
	"os/exec"
)

func main() {
	cmd := exec.Command("git", "show", "--no-patch", "--format=%H")
	out, _ := cmd.CombinedOutput()
	fmt.Printf("revision: %s\n", out)
}
$ go mod init sample 
$ git init && git add . && git commit -m 'initial commit'
$ go build . && ./sample
revision: 680ec96a84debf616fd3f339e9b55b0897ac1b9c

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