You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: util_unix.go
    path of file: ./repos/lotus/storage/paths
    
    the code of the file until where you have to start completion: package paths

import (
	"bytes"
	"os"
	"os/exec"
	"path/filepath"
	"runtime"
	"strings"

	"github.com/mitchellh/go-homedir"
	"golang.org/x/xerrors"
)

func Move(from, to string) error {
	from, err := homedir.Expand(from)
	if err != nil {
		return xe
    
func Move(from, to string) error {
	from, err := homedir.Expand(from)
	if err != nil {
		return xerrors.Errorf("move: expanding from: %w", err)
	}

	to, err = homedir.Expand(to)
	if err != nil {
		return xerrors.Errorf("move: expanding to: %w", err)
	}

	if filepath.Base(from) != filepath.Base(to) {
		return xerrors.Errorf("move: base names must match ('%s' != '%s')", filepath.Base(from), filepath.Base(to))
	}

	log.Debugw("move sector data", "from", from, "to", to)

	toDir := filepath.Dir(to)

	// `mv` has decades of experience in moving files quickly; don't pretend we
	//  can do better

	var errOut bytes.Buffer

	var cmd *exec.Cmd
	if runtime.GOOS == "darwin" {
		if err := os.MkdirAll(toDir, 0777); err != nil {
			return xerrors.Errorf("failed exec MkdirAll: %s", err)
		}

		cmd = exec.Command("/usr/bin/env", "mv", from, toDir) // nolint
	} else {
		cmd = exec.Command("/usr/bin/env", "mv", "-t", toDir, from) // nolint
	}

	cmd.Stderr = &errOut
	if err := cmd.Run(); err != nil {
		return xerrors.Errorf("exec mv (stderr: %s): %w", strings.TrimSpace(errOut.String()), err)
	}

	return nil
}