Initial

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

vendor/github.com/containerd/ttrpc/config.go

@@ -0,0 +1,52 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package ttrpc
+
+import "github.com/pkg/errors"
+
+type serverConfig struct {
+	handshaker  Handshaker
+	interceptor UnaryServerInterceptor
+}
+
+// ServerOpt for configuring a ttrpc server
+type ServerOpt func(*serverConfig) error
+
+// WithServerHandshaker can be passed to NewServer to ensure that the
+// handshaker is called before every connection attempt.
+//
+// Only one handshaker is allowed per server.
+func WithServerHandshaker(handshaker Handshaker) ServerOpt {
+	return func(c *serverConfig) error {
+		if c.handshaker != nil {
+			return errors.New("only one handshaker allowed per server")
+		}
+		c.handshaker = handshaker
+		return nil
+	}
+}
+
+// WithUnaryServerInterceptor sets the provided interceptor on the server
+func WithUnaryServerInterceptor(i UnaryServerInterceptor) ServerOpt {
+	return func(c *serverConfig) error {
+		if c.interceptor != nil {
+			return errors.New("only one interceptor allowed per server")
+		}
+		c.interceptor = i
+		return nil
+	}
+}