require Go 1.13

README.md

@@ -4,7 +4,7 @@
 
 1. Install the following:
 
-   * go 1.12 or later
+   * go 1.13 or later
    * az client
 
 1. Log in to Azure:

pkg/util/arm/arm.go

@@ -3,7 +3,6 @@ package arm
 import (
 	"encoding/json"
 	"fmt"
-	"math"
 	"reflect"
 
 	uuid "github.com/satori/go.uuid"
@@ -95,7 +94,7 @@ func (r *Resource) MarshalJSON() ([]byte, error) {
 		if idx, found := indexes[field.Name]; found {
 			field.Type = emptyInterfaceType
 			fields[idx] = field
-			if !isZero(outer.Field(i)) {
+			if !outer.Field(i).IsZero() {
 				values[idx] = outer.Field(i)
 			}
 		} else {
@@ -210,7 +209,7 @@ func _shadowCopy(v reflect.Value) reflect.Value {
 
 		s := reflect.New(t).Elem()
 		for i, v := range values {
-			if !isZero(v) {
+			if !v.IsZero() {
 				s.Field(i).Set(v)
 			}
 		}
@@ -220,43 +219,3 @@ func _shadowCopy(v reflect.Value) reflect.Value {
 		return v
 	}
 }
-
-// isZero is a copy of `func (v reflect.Value) IsZero() bool`, which is built-in
-// in from Go 1.13
-func isZero(v reflect.Value) bool {
-	switch v.Kind() {
-	case reflect.Bool:
-		return !v.Bool()
-	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-		return v.Int() == 0
-	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
-		return v.Uint() == 0
-	case reflect.Float32, reflect.Float64:
-		return math.Float64bits(v.Float()) == 0
-	case reflect.Complex64, reflect.Complex128:
-		c := v.Complex()
-		return math.Float64bits(real(c)) == 0 && math.Float64bits(imag(c)) == 0
-	case reflect.Array:
-		for i := 0; i < v.Len(); i++ {
-			if !isZero(v.Index(i)) {
-				return false
-			}
-		}
-		return true
-	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice, reflect.UnsafePointer:
-		return v.IsNil()
-	case reflect.String:
-		return v.Len() == 0
-	case reflect.Struct:
-		for i := 0; i < v.NumField(); i++ {
-			if !isZero(v.Field(i)) {
-				return false
-			}
-		}
-		return true
-	default:
-		// This should never happen, but will act as a safeguard for
-		// later, as a default value doesn't makes sense here.
-		panic(&reflect.ValueError{Method: "reflect.Value.IsZero", Kind: v.Kind()})
-	}
-}