if err != nil {
		return nil, nil, fmt.Errorf("Drive %s: %w", export, err)
	}

	migrate := func(formatPath string, formatData []byte) ([]byte, fs.FileInfo, error) {
		if err = os.WriteFile(formatPath, formatData, 0o666); err != nil {
			return nil, nil, err
		}
		formatFi, err := Lstat(formatPath)
		if err != nil {
			return nil, nil, err
		}
		return formatData, formatFi, nil
	}

	uuid, _ := uuid2.NewRandom()
	for _, drive := range fsDirs {
		dir := path.Join(drive, bucket, object, uuid.String())
		err = os.MkdirAll(dir, os.ModePerm)
		if err != nil {
			t.Fatal(err)
		}
		err = os.WriteFile(pathJoin(dir, "part.1"), []byte("some data"), os.ModePerm)
		if err != nil {
			t.Fatal(err)
		}
	}

	// This should remove all the unreferenced parts.

pkg io/ioutil, func ReadFile(string) ([]uint8, error)
pkg io/ioutil, func TempDir(string, string) (string, error)
pkg io/ioutil, func TempFile(string, string) (*os.File, error)
pkg io/ioutil, func WriteFile(string, []uint8, os.FileMode) error
pkg io/ioutil, var Discard io.Writer
pkg log, const Ldate ideal-int
pkg log, const Llongfile ideal-int
pkg log, const Lmicroseconds ideal-int
pkg log, const Lshortfile ideal-int

pkg os, func ReadDir(string) ([]fs.DirEntry, error)
pkg os, func ReadFile(string) ([]uint8, error)
pkg os, func SameFile(fs.FileInfo, fs.FileInfo) bool
pkg os, func Stat(string) (fs.FileInfo, error)
pkg os, func WriteFile(string, []uint8, fs.FileMode) error
pkg os, method (*File) Chmod(fs.FileMode) error
pkg os, method (*File) ReadDir(int) ([]fs.DirEntry, error)
pkg os, method (*File) Readdir(int) ([]fs.FileInfo, error)

"sub", "one", "from_montgomery", "to_montgomery", "selectznz", "to_bytes", "from_bytes") cmd.Stderr = os.Stderr out, err := cmd.Output() if err != nil { log.Fatal(err) } out, err = format.Source(out) if err != nil { log.Fatal(err) } if err := os.WriteFile(c.Prefix+"_fiat64.go", out, 0644); err != nil { log.Fatal(err) } log.Printf("Generating %s_invert.go...", c.Prefix) f, err = os.CreateTemp("", "addchain-"+c.Prefix) if err != nil { log.Fatal(err) } defer os.Remove(f.Name()) cmd = exec.Command("addchain",...

"sub", "one", "from_montgomery", "to_montgomery", "selectznz", "to_bytes", "from_bytes") cmd.Stderr = os.Stderr out, err := cmd.Output() if err != nil { log.Fatal(err) } out, err = format.Source(out) if err != nil { log.Fatal(err) } if err := os.WriteFile(c.Prefix+"_fiat64.go", out, 0644); err != nil { log.Fatal(err) } log.Printf("Generating %s_invert.go...", c.Prefix) f, err = os.CreateTemp("", "addchain-"+c.Prefix) if err != nil { log.Fatal(err) } defer os.Remove(f.Name()) cmd = exec.Command("addchain",...