Method installGit

pkg/cmd/extension/manager.go:413–453

(repo ghrepo.Interface, target string)

}

func (m *Manager) installGit(repo ghrepo.Interface, target string) error {
	protocol := m.config.GitProtocol(repo.RepoHost()).Value
	cloneURL := ghrepo.FormatRemoteURL(repo, protocol)

	var commitSHA string
	if target != "" {
		var err error
		commitSHA, err = fetchCommitSHA(m.client, repo, target)
		if err != nil {
			return err
		}
	}

	name := strings.TrimSuffix(path.Base(cloneURL), ".git")
	targetDir := filepath.Join(m.installDir(), name)

	if err := m.cleanExtensionUpdateDir(name); err != nil {
		return err
	}

	_, err := m.gitClient.Clone(cloneURL, []string{targetDir})
	if err != nil {
		return err
	}
	if commitSHA == "" {
		return nil
	}

	scopedClient := m.gitClient.ForRepo(targetDir)
	err = scopedClient.CheckoutBranch(commitSHA)
	if err != nil {
		return err
	}

	pinPath := filepath.Join(targetDir, fmt.Sprintf(".pin-%s", commitSHA))
	f, err := os.OpenFile(pinPath, os.O_WRONLY|os.O_CREATE, 0600)
	if err != nil {
		return fmt.Errorf("failed to create pin file in directory: %w", err)
	}
	return f.Close()
}

var pinnedExtensionUpgradeError = errors.New("pinned extensions can not be upgraded")
var localExtensionUpgradeError = errors.New("local extensions can not be upgraded")