Bump objx to v0.2.0

Signed-off-by: He Xiaoxi <xxhe@alauda.io>

vendor/github.com/stretchr/objx/value.go

@@ -20,6 +20,8 @@ func (v *Value) Data() interface{} {
 // String returns the value always as a string
 func (v *Value) String() string {
 	switch {
+	case v.IsNil():
+		return ""
 	case v.IsStr():
 		return v.Str()
 	case v.IsBool():
@@ -51,3 +53,107 @@ func (v *Value) String() string {
 	}
 	return fmt.Sprintf("%#v", v.Data())
 }
+
+// StringSlice returns the value always as a []string
+func (v *Value) StringSlice(optionalDefault ...[]string) []string {
+	switch {
+	case v.IsStrSlice():
+		return v.MustStrSlice()
+	case v.IsBoolSlice():
+		slice := v.MustBoolSlice()
+		vals := make([]string, len(slice))
+		for i, iv := range slice {
+			vals[i] = strconv.FormatBool(iv)
+		}
+		return vals
+	case v.IsFloat32Slice():
+		slice := v.MustFloat32Slice()
+		vals := make([]string, len(slice))
+		for i, iv := range slice {
+			vals[i] = strconv.FormatFloat(float64(iv), 'f', -1, 32)
+		}
+		return vals
+	case v.IsFloat64Slice():
+		slice := v.MustFloat64Slice()
+		vals := make([]string, len(slice))
+		for i, iv := range slice {
+			vals[i] = strconv.FormatFloat(iv, 'f', -1, 64)
+		}
+		return vals
+	case v.IsIntSlice():
+		slice := v.MustIntSlice()
+		vals := make([]string, len(slice))
+		for i, iv := range slice {
+			vals[i] = strconv.FormatInt(int64(iv), 10)
+		}
+		return vals
+	case v.IsInt8Slice():
+		slice := v.MustInt8Slice()
+		vals := make([]string, len(slice))
+		for i, iv := range slice {
+			vals[i] = strconv.FormatInt(int64(iv), 10)
+		}
+		return vals
+	case v.IsInt16Slice():
+		slice := v.MustInt16Slice()
+		vals := make([]string, len(slice))
+		for i, iv := range slice {
+			vals[i] = strconv.FormatInt(int64(iv), 10)
+		}
+		return vals
+	case v.IsInt32Slice():
+		slice := v.MustInt32Slice()
+		vals := make([]string, len(slice))
+		for i, iv := range slice {
+			vals[i] = strconv.FormatInt(int64(iv), 10)
+		}
+		return vals
+	case v.IsInt64Slice():
+		slice := v.MustInt64Slice()
+		vals := make([]string, len(slice))
+		for i, iv := range slice {
+			vals[i] = strconv.FormatInt(iv, 10)
+		}
+		return vals
+	case v.IsUintSlice():
+		slice := v.MustUintSlice()
+		vals := make([]string, len(slice))
+		for i, iv := range slice {
+			vals[i] = strconv.FormatUint(uint64(iv), 10)
+		}
+		return vals
+	case v.IsUint8Slice():
+		slice := v.MustUint8Slice()
+		vals := make([]string, len(slice))
+		for i, iv := range slice {
+			vals[i] = strconv.FormatUint(uint64(iv), 10)
+		}
+		return vals
+	case v.IsUint16Slice():
+		slice := v.MustUint16Slice()
+		vals := make([]string, len(slice))
+		for i, iv := range slice {
+			vals[i] = strconv.FormatUint(uint64(iv), 10)
+		}
+		return vals
+	case v.IsUint32Slice():
+		slice := v.MustUint32Slice()
+		vals := make([]string, len(slice))
+		for i, iv := range slice {
+			vals[i] = strconv.FormatUint(uint64(iv), 10)
+		}
+		return vals
+	case v.IsUint64Slice():
+		slice := v.MustUint64Slice()
+		vals := make([]string, len(slice))
+		for i, iv := range slice {
+			vals[i] = strconv.FormatUint(iv, 10)
+		}
+		return vals
+	}
+	if len(optionalDefault) == 1 {
+		return optionalDefault[0]
+	}
+
+	return []string{}
+}