func isDeviceOrUncPath(path string) bool {
	if strings.HasPrefix(path, "Volume") || strings.HasPrefix(path, "\\\\?\\") || strings.HasPrefix(path, "\\\\.\\") || strings.HasPrefix(path, "UNC") {
		return true
	}
	return false
}

// getUpperPath removes the last level of directory.
func getUpperPath(path string) string {
	sep := fmt.Sprintf("%c", filepath.Separator)
	upperpath := strings.TrimSuffix(path, sep)

		return
	}
	data := string(bdata)

	// process header lines
	for data != "" {
		var line string
		line, data, _ = strings.Cut(data, "\n")
		if line == "main" {
			lib.Main = true
		}
		if line == "" {
			break
		}
	}

	// look for cgo section
	p0 := strings.Index(data, "\n$$  // cgo")
	var p1 int
	if p0 >= 0 {
		p0 += p1
		i := strings.IndexByte(data[p0+1:], '\n')
		if i < 0 {

        "//tensorflow/core:framework",
        "//tensorflow/core/transforms/toposort:Pass",
        "@com_google_absl//absl/container:flat_hash_map",
        "@com_google_absl//absl/log",
        "@com_google_absl//absl/strings",
        "@llvm-project//llvm:Support",
        "@llvm-project//mlir:FuncDialect",
        "@llvm-project//mlir:IR",
        "@llvm-project//mlir:Pass",
        "@llvm-project//mlir:Support",

	}
	return keys
}

func (kvs KVS) String() string {
	var s strings.Builder
	for _, kv := range kvs {
		s.WriteString(kv.String())
		s.WriteString(KvSpaceSeparator)
	}
	return s.String()
}

// Merge environment values with on disk KVS, environment values overrides
// anything on the disk.
func Merge(cfgKVS map[string]KVS, envname string, defaultKVS KVS) map[string]KVS {
	newCfgKVS := make(map[string]KVS)

// normalizeWhitespace replaces 2+ whitespace sequences with a single space.
func normalizeWhitespace(x string) string {
	x = strings.Join(strings.Fields(x), " ")
	x = strings.Replace(x, "( ", "(", -1)
	x = strings.Replace(x, " )", ")", -1)
	x = strings.Replace(x, "[ ", "[", -1)
	x = strings.Replace(x, " ]", "]", -1)
	x = strings.Replace(x, ")=>", ") =>", -1)
	return x
}

	}
	rb.Write([]byte(strings.Repeat("abcd", 15)))

	if !bytes.Equal(rb.Bytes(nil), []byte("bcd"+strings.Repeat("abcd", 15))) {
		t.Fatalf("expect 63 ... but got %s. r.w=%d, r.r=%d", rb.Bytes(nil), rb.w, rb.r)
	}

	rb.Reset()
	n, err = rb.Write([]byte(strings.Repeat("abcd", 16)))
	if err != nil {
		t.Fatalf("write failed: %v", err)
	}
	if n != 64 {

func (p *proxyRepo) Versions(ctx context.Context, prefix string) (*Versions, error) {
	data, err := p.getBytes(ctx, "@v/list")
	if err != nil {
		p.listLatestOnce.Do(func() {
			p.listLatest, p.listLatestErr = nil, p.versionError("", err)
		})
		return nil, p.versionError("", err)
	}
	var list []string
	allLine := strings.Split(string(data), "\n")
	for _, line := range allLine {
		f := strings.Fields(line)

// addStrings takes a batch whose first byte is an EvStrings event
// (indicating that the batch contains only strings) and adds each
// string contained therein to the provided strings map.
func addStrings(stringTable *dataTable[stringID, string], b batch) error {
	if !b.isStringsBatch() {
		return fmt.Errorf("internal error: addStrings called on non-string batch")
	}
	r := bytes.NewReader(b.data)
	hdr, err := r.ReadByte() // Consume the EvStrings byte.

}

// split splits pre«mid»post into pre, mid, post.
// If the string does not have that form, split returns x, "", "".
func split(x string) (pre, mid, post string) {
	start, end := strings.Index(x, "«"), strings.LastIndex(x, "»")
	if start < 0 || end < 0 {
		return x, "", ""
	}
	return x[:start], x[start+len("«") : end], x[end+len("»"):]
}

	// 2 orders, and possible differences in spacing.
	sliceMapSfx1 := `map[string][]string = {["e"] = []string = {"f", "g", "h"}, ["a"] = []string = {"b", "c", "d"}}`
	sliceMapSfx2 := `map[string][]string = {["a"] = []string = {"b", "c", "d"}, ["e"] = []string = {"f", "g", "h"}}`
	if bl := strings.ReplaceAll(blocks["print slicemap"], "  ", " "); !strings.HasSuffix(bl, sliceMapSfx1) && !strings.HasSuffix(bl, sliceMapSfx2) {
		t.Fatalf("print slicemap failed: %s", bl)