Function gitDirAtPath

lfshttp/standalone/standalone.go:100–155

gitDirAtPath finds the .git directory corresponding to the given path, which may be the .git directory itself, the working tree, or the root of a bare repository. We filter out the GIT_DIR environment variable to ensure we get the expected result, and we change directories to ensure that we can mak

(path string)

// filepath.Abs. Using --absolute-git-dir instead of --git-dir is not an option
// because we support Git versions that don't have --absolute-git-dir.
func gitDirAtPath(path string) (string, error) {
	// Filter out all the GIT_* environment variables.
	env := os.Environ()
	n := 0
	for _, val := range env {
		if !strings.HasPrefix(val, "GIT_") {
			env[n] = val
			n++
		}
	}
	env = env[:n]

	// Trim any trailing .git path segment.
	if filepath.Base(path) == ".git" {
		path = filepath.Dir(path)
	}

	curdir, err := os.Getwd()
	if err != nil {
		return "", err
	}

	err = os.Chdir(path)
	if err != nil {
		return "", err
	}

	cmd, err := subprocess.ExecCommand("git", "rev-parse", "--git-dir")
	if err != nil {
		return "", errors.Wrap(err, tr.Tr.Get("failed to find `git rev-parse --git-dir`"))
	}
	cmd.Cmd.Env = env
	out, err := cmd.Output()
	if err != nil {
		if err, ok := err.(*exec.ExitError); ok && len(err.Stderr) > 0 {
			return "", errors.New(tr.Tr.Get("failed to call `git rev-parse --git-dir`: %s", string(err.Stderr)))
		}
		return "", errors.Wrap(err, tr.Tr.Get("failed to call `git rev-parse --git-dir`"))
	}

	gitdir, err := tools.TranslateCygwinPath(strings.TrimRight(string(out), "\n"))
	if err != nil {
		return "", errors.Wrap(err, tr.Tr.Get("unable to translate path"))
	}

	gitdir, err = filepath.Abs(gitdir)
	if err != nil {
		return "", errors.Wrap(err, tr.Tr.Get("unable to canonicalize path"))
	}

	err = os.Chdir(curdir)
	if err != nil {
		return "", err
	}
	return tools.CanonicalizeSystemPath(gitdir)
}

func fixUrlPath(path string) string {