升级流程引擎配置文件版本

vendor/go.mongodb.org/mongo-driver/internal/background_context.go

@@ -0,0 +1,34 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// 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
+
+package internal
+
+import "context"
+
+// backgroundContext is an implementation of the context.Context interface that wraps a child Context. Value requests
+// are forwarded to the child Context but the Done and Err functions are overridden to ensure the new context does not
+// time out or get cancelled.
+type backgroundContext struct {
+	context.Context
+	childValuesCtx context.Context
+}
+
+// NewBackgroundContext creates a new Context whose behavior matches that of context.Background(), but Value calls are
+// forwarded to the provided ctx parameter. If ctx is nil, context.Background() is returned.
+func NewBackgroundContext(ctx context.Context) context.Context {
+	if ctx == nil {
+		return context.Background()
+	}
+
+	return &backgroundContext{
+		Context:        context.Background(),
+		childValuesCtx: ctx,
+	}
+}
+
+func (b *backgroundContext) Value(key interface{}) interface{} {
+	return b.childValuesCtx.Value(key)
+}