bump docker/go-units v0.3.3

relevant changes:

  - docker/go-units#8 Enhance FromHumanSize to parse float64 string
  - docker/go-units#20 Add `HumanSizeWithPrecision` function

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

vendor/github.com/docker/go-units/size.go

@@ -31,33 +31,46 @@ type unitMap map[string]int64
 var (
 	decimalMap = unitMap{"k": KB, "m": MB, "g": GB, "t": TB, "p": PB}
 	binaryMap  = unitMap{"k": KiB, "m": MiB, "g": GiB, "t": TiB, "p": PiB}
-	sizeRegex  = regexp.MustCompile(`^(\d+)([kKmMgGtTpP])?[bB]?$`)
+	sizeRegex  = regexp.MustCompile(`^(\d+(\.\d+)*) ?([kKmMgGtTpP])?[iI]?[bB]?$`)
 )
 
 var decimapAbbrs = []string{"B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"}
 var binaryAbbrs = []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"}
 
-// CustomSize returns a human-readable approximation of a size
-// using custom format.
-func CustomSize(format string, size float64, base float64, _map []string) string {
+func getSizeAndUnit(size float64, base float64, _map []string) (float64, string) {
 	i := 0
-	for size >= base {
+	unitsLimit := len(_map) - 1
+	for size >= base && i < unitsLimit {
 		size = size / base
 		i++
 	}
-	return fmt.Sprintf(format, size, _map[i])
+	return size, _map[i]
+}
+
+// CustomSize returns a human-readable approximation of a size
+// using custom format.
+func CustomSize(format string, size float64, base float64, _map []string) string {
+	size, unit := getSizeAndUnit(size, base, _map)
+	return fmt.Sprintf(format, size, unit)
+}
+
+// HumanSizeWithPrecision allows the size to be in any precision,
+// instead of 4 digit precision used in units.HumanSize.
+func HumanSizeWithPrecision(size float64, precision int) string {
+	size, unit := getSizeAndUnit(size, 1000.0, decimapAbbrs)
+	return fmt.Sprintf("%.*g%s", precision, size, unit)
 }
 
 // HumanSize returns a human-readable approximation of a size
 // capped at 4 valid numbers (eg. "2.746 MB", "796 KB").
 func HumanSize(size float64) string {
-	return CustomSize("%.4g %s", size, 1000.0, decimapAbbrs)
+	return HumanSizeWithPrecision(size, 4)
 }
 
 // BytesSize returns a human-readable size in bytes, kibibytes,
 // mebibytes, gibibytes, or tebibytes (eg. "44kiB", "17MiB").
 func BytesSize(size float64) string {
-	return CustomSize("%.4g %s", size, 1024.0, binaryAbbrs)
+	return CustomSize("%.4g%s", size, 1024.0, binaryAbbrs)
 }
 
 // FromHumanSize returns an integer from a human-readable specification of a
@@ -77,19 +90,19 @@ func RAMInBytes(size string) (int64, error) {
 // Parses the human-readable size string into the amount it represents.
 func parseSize(sizeStr string, uMap unitMap) (int64, error) {
 	matches := sizeRegex.FindStringSubmatch(sizeStr)
-	if len(matches) != 3 {
+	if len(matches) != 4 {
 		return -1, fmt.Errorf("invalid size: '%s'", sizeStr)
 	}
 
-	size, err := strconv.ParseInt(matches[1], 10, 0)
+	size, err := strconv.ParseFloat(matches[1], 64)
 	if err != nil {
 		return -1, err
 	}
 
-	unitPrefix := strings.ToLower(matches[2])
+	unitPrefix := strings.ToLower(matches[3])
 	if mul, ok := uMap[unitPrefix]; ok {
-		size *= mul
+		size *= float64(mul)
 	}
 
-	return size, nil
+	return int64(size), nil
 }