Handle DialContext deprecation

Signed-off-by: Andrew Harding <[email protected]>

v2/examples/spiffe-grpc/README.md

@@ -31,7 +31,7 @@ On the other side, the **gRPC client** uses the [workloadapi.X509Source](https:/
 serverID := spiffeid.RequireFromString("spiffe://example.org/server")
 tlsConfig := tlsconfig.MTLSClientConfig(source, source, tlsconfig.AuthorizeID(serverID))
 
-conn, err := grpc.DialContext(ctx, "localhost:50051", grpc.WithTransportCredentials(credentials.NewTLS(tlsConfig)))
+conn, err := grpc.NewClient("dns:///localhost:50051", grpc.WithTransportCredentials(credentials.NewTLS(tlsConfig)))
 ```
 
 The [tlsconfig.Authorizer](https://pkg.go.dev/github.com/spiffe/go-spiffe/v2/spiffetls/tlsconfig?tab=doc#Authorizer) is used to authorize the mTLS peer. In this example, both the client and server use it to authorize the specific SPIFFE ID of the other side of the connection.

v2/examples/spiffe-grpc/client/main.go

@@ -35,7 +35,7 @@ func run(ctx context.Context) error {
 	serverID := spiffeid.RequireFromString("spiffe://example.org/server")
 
 	// Dial the server with credentials that do mTLS and verify that presented certificate has SPIFFE ID `spiffe://example.org/server`
-	conn, err := grpc.DialContext(ctx, "localhost:50051", grpc.WithTransportCredentials(
+	conn, err := grpc.NewClient("dns:///localhost:50051", grpc.WithTransportCredentials(
 		grpccredentials.MTLSClientCredentials(source, source, tlsconfig.AuthorizeID(serverID)),
 	))
 	if err != nil {

v2/spiffegrpc/grpccredentials/credentials_test.go

@@ -147,7 +147,7 @@ func testCredentials(t *testing.T, clientCreds, serverCreds credentials.Transpor
 		_ = server.Serve(listener)
 	}()
 
-	conn, err := grpc.DialContext(ctx, listener.Addr().String(), grpc.WithTransportCredentials(clientCreds))
+	conn, err := grpc.NewClient(listener.Addr().String(), grpc.WithTransportCredentials(clientCreds))
 	require.NoError(t, err)
 	defer conn.Close()
 

v2/workloadapi/client.go

@@ -255,7 +255,7 @@ func (c *Client) ValidateJWTSVID(ctx context.Context, token, audience string) (*
 func (c *Client) newConn(ctx context.Context) (*grpc.ClientConn, error) {
 	c.config.dialOptions = append(c.config.dialOptions, grpc.WithTransportCredentials(insecure.NewCredentials()))
 	c.appendDialOptionsOS()
-	return grpc.DialContext(ctx, c.config.address, c.config.dialOptions...)
+	return grpc.DialContext(ctx, c.config.address, c.config.dialOptions...) //nolint:staticcheck // preserve backcompat with WithDialOptions option
 }
 
 func (c *Client) handleWatchError(ctx context.Context, err error, backoff *backoff) error {