fix: UserInfo copy in CopyUrl

.golangci.yml

@@ -140,8 +140,6 @@ issues:
       text: "context-keys-type: should not use basic type string as key" # TODO(ldez) must be fixed
     - path: .*_test.go
       text: "SA1029: should not use built-in type string as key for value" # TODO(ldez) must be fixed
-    - path: utils/netutils.go
-      text: "SA4001: &\\*x will be simplified to x. It will not copy x." # TODO(ldez) must be fixed
     - path: cbreaker/cbreaker_test.go
       text: "`statsNetErrors` - `threshold` always receives `0.6`" # TODO(ldez) must be fixed
     - path: buffer/buffer.go

utils/netutils.go

@@ -160,13 +160,14 @@ func NopWriteCloser(w io.Writer) io.WriteCloser {
 func CopyURL(i *url.URL) *url.URL {
 	out := *i
 	if i.User != nil {
-		out.User = &(*i.User)
+		u := *i.User
+		out.User = &u
 	}
 	return &out
 }
 
 // CopyHeaders copies http headers from source to destination, it
-// does not overide, but adds multiple headers.
+// does not override, but adds multiple headers.
 func CopyHeaders(dst http.Header, src http.Header) {
 	for k, vv := range src {
 		dst[k] = append(dst[k], vv...)

utils/netutils_test.go

@@ -8,9 +8,10 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-// Make sure copy does it right, so the copied url
-// is safe to alter without modifying the other.
+// Make sure copy does it right, so the copied url is safe to alter without modifying the other.
 func TestCopyUrl(t *testing.T) {
+	userinfo := url.UserPassword("foo", "secret")
+
 	urlA := &url.URL{
 		Scheme:   "http",
 		Host:     "localhost:5000",
@@ -18,13 +19,19 @@ func TestCopyUrl(t *testing.T) {
 		Opaque:   "opaque",
 		RawQuery: "a=1&b=2",
 		Fragment: "#hello",
-		User:     &url.Userinfo{},
+		User:     userinfo,
 	}
 
 	urlB := CopyURL(urlA)
 	assert.Equal(t, urlA, urlB)
 
+	*userinfo = *url.User("bar")
+
+	assert.Equal(t, urlA.User, userinfo)
+	assert.NotEqual(t, urlA.User, urlB.User)
+
 	urlB.Scheme = "https"
+
 	assert.NotEqual(t, urlA, urlB)
 }