update

Signed-off-by: hongming <talonwan@yunify.com>

vendor/github.com/open-policy-agent/opa/internal/merge/merge.go

@@ -0,0 +1,40 @@
+// Copyright 2017 The OPA Authors.  All rights reserved.
+// Use of this source code is governed by an Apache2
+// license that can be found in the LICENSE file.
+
+// Package merge contains helpers to merge data structures
+// frequently encountered in OPA.
+package merge
+
+// InterfaceMaps returns the result of merging a and b. If a and b cannot be
+// merged because of conflicting key-value pairs, ok is false.
+func InterfaceMaps(a map[string]interface{}, b map[string]interface{}) (c map[string]interface{}, ok bool) {
+
+	c = map[string]interface{}{}
+	for k := range a {
+		c[k] = a[k]
+	}
+
+	for k := range b {
+
+		add := b[k]
+		exist, ok := c[k]
+		if !ok {
+			c[k] = add
+			continue
+		}
+
+		existObj, existOk := exist.(map[string]interface{})
+		addObj, addOk := add.(map[string]interface{})
+		if !existOk || !addOk {
+			return nil, false
+		}
+
+		c[k], ok = InterfaceMaps(existObj, addObj)
+		if !ok {
+			return nil, false
+		}
+	}
+
+	return c, true
+}