handle nanoseconds, ..., milliseconds

Signed-off-by: iTrooz <hey@itrooz.fr>

pkg/cmd/util/flag/duration.go

@@ -16,14 +16,19 @@ type Duration struct {
 }
 
 // unit map: symbol -> seconds
-var unitMap = map[string]int64{
-	"yr": 365 * 24 * 3600,
-	"mo": 30 * 24 * 3600,
-	"w":  7 * 24 * 3600,
-	"d":  24 * 3600,
-	"h":  3600,
-	"m":  60,
-	"s":  1,
+var unitMap = map[string]uint64{
+	"ns": uint64(time.Nanosecond),
+	"us": uint64(time.Microsecond),
+	"µs": uint64(time.Microsecond), // U+00B5 = micro symbol
+	"μs": uint64(time.Microsecond), // U+03BC = Greek letter mu
+	"ms": uint64(time.Millisecond),
+	"s":  uint64(time.Second),
+	"m":  uint64(time.Minute),
+	"h":  uint64(time.Hour),
+	"d":  uint64(24 * time.Hour),
+	"w":  uint64(7 * 24 * time.Hour),
+	"mo": uint64(30 * 24 * time.Hour),
+	"yr": uint64(365 * 24 * time.Hour),
 }
 
 // ParseDuration parses strings like "2d5h10m"
@@ -33,7 +38,7 @@ func ParseDuration(s string) (Duration, error) {
 		return Duration{Duration: 0}, nil
 	}
 
-	var total int64
+	var total uint64
 	i := 0
 	n := len(s)
 
@@ -47,7 +52,7 @@ func ParseDuration(s string) (Duration, error) {
 			return Duration{}, fmt.Errorf("expected number at pos %d", i)
 		}
 		numStr := s[i:j]
-		num, err := strconv.ParseInt(numStr, 10, 64)
+		num, err := strconv.ParseUint(numStr, 10, 64)
 		if err != nil {
 			return Duration{}, err
 		}
@@ -77,7 +82,7 @@ func ParseDuration(s string) (Duration, error) {
 	}
 
 	// Convert integer seconds into time.Duration
-	return Duration{Duration: time.Duration(total) * time.Second}, nil
+	return Duration{Duration: time.Duration(total)}, nil
 }
 
 func (d *Duration) String() string { return duration.ShortHumanDuration(d.Duration) }