如何在 android.go 中解析 git 提交 id

Question

As title, I try to call

cmd := exec.Command(commit_id, "=", "$(git rev-parse --short HEAD)")
cmd.Run()
fmt.Println("commit_id = ", commit_id);

But the result is null. Does somebody know how to parse git commit-id? Thanks!

Answer 1

Here is a sample.

package main

import (
    "bytes"
    "fmt"
    "os/exec"
)

func main() {
    var commitid string
    var sout, serr bytes.Buffer
    cmd := exec.Command("git", "rev-parse", "--short", "HEAD")
    cmd.Stdout = &sout
    cmd.Stderr = &serr
    err := cmd.Run()
    if err != nil {
        fmt.Println(serr.String())
    } else {
        commitid = sout.String()
        fmt.Println("commit_id =", commitid)
    }
}

I am new to Golang. The code could be better. I followed the example in Command and it seems that it works this way.

Answer 2

Save the below code as commit_hash.go

import (
    "bytes"
    "fmt"
    "os"
    "os/exec"
)

func main() {
    commit, err := commitHash()
    if err != nil {
        fmt.Printf("\x1b[31;1m%s\x1b[0m\n", fmt.Sprintf("error: %s", err))
        os.Exit(1)
    }
    fmt.Printf("commit_id=%s", commit)
}

func commitHash() (string, error) {
    cmd := exec.Command("git", "rev-parse", "--short", "HEAD")
    var stdout, stderr bytes.Buffer
    cmd.Stdout = &stdout
    cmd.Stderr = &stderr
    if err := cmd.Run(); err != nil {
        return "", fmt.Errorf("%w; %s", err, stderr.String())
    }
    return stdout.String(), nil
}

then run it from your git repository:

go run commit_hash.go