// GetRepo retrieves a Masterminds/vcs repo object configured for the root
// of the package being retrieved.
func (d *Dependency) GetRepo(dest string) (vcs.Repo, error) {

	// The remote location is either the configured repo or the package
	// name as an https url.
	var remote string
	if len(d.Repository) > 0 {
		remote = d.Repository
	} else {
		remote = "https://" + d.Name
	}

	// If the VCS type has a value we try that first.
	if len(d.VcsType) > 0 && d.VcsType != "None" {
		switch vcs.Type(d.VcsType) {
		case vcs.Git:
			return vcs.NewGitRepo(remote, dest)
		case vcs.Svn:
			return vcs.NewSvnRepo(remote, dest)
		case vcs.Hg:
			return vcs.NewHgRepo(remote, dest)
		case vcs.Bzr:
			return vcs.NewBzrRepo(remote, dest)
		default:
			return nil, fmt.Errorf("Unknown VCS type %s set for %s", d.VcsType, d.Name)
		}
	}

	// When no type set we try to autodetect.
	return vcs.NewRepo(remote, dest)
}

// ensureRepo ensures that the repo exists and is checked out.
func ensureRepo(repo, home string) *vcs.GitRepo {
	if err := os.Chdir(home); err != nil {
		log.Die("Could not change to directory %q: %s", home, err)
	}
	git, err := vcs.NewGitRepo(repo, home)
	if err != nil {
		log.Die("Could not get repository %q: %s", repo, err)
	}

	if !git.CheckLocal() {
		log.Info("Cloning repo into %q. Please wait.", home)
		if err := git.Get(); err != nil {
			log.Die("Could not create repository in %q: %s", home, err)
		}
	}

	return git
}

func ensureRepo(repo, dir string) (*vcs.GitRepo, error) {
	if fi, err := os.Stat(dir); err != nil {
		if err := os.MkdirAll(dir, 0755); err != nil {
			return nil, err
		}
	} else if !fi.IsDir() {
		return nil, fmt.Errorf("File %s exists, but is not a directory.", dir)
	}
	git, err := vcs.NewGitRepo(repo, dir)
	if err != nil {
		return nil, err
	}

	git.Logger = log.New()

	if !git.CheckLocal() {
		if err := git.Get(); err != nil {
			return git, err
		}
	}
	return git, nil
}