Add simple Redis Server which is only capable of doing publish / subscribe. New ws redis_server sub-command to use it. The server is used in the unittest, so that we can run on CI in environment where redis isn not available like github actions env.

ws/ws_redis_server.cpp

@@ -0,0 +1,32 @@
+/*
+ *  ws_redis_publish.cpp
+ *  Author: Benjamin Sergeant
+ *  Copyright (c) 2019 Machine Zone, Inc. All rights reserved.
+ */
+
+#include <iostream>
+#include <ixsnake/IXRedisServer.h>
+#include <spdlog/spdlog.h>
+#include <sstream>
+
+namespace ix
+{
+    int ws_redis_server_main(int port, const std::string& hostname)
+    {
+        spdlog::info("Listening on {}:{}", hostname, port);
+
+        ix::RedisServer server(port, hostname);
+
+        auto res = server.listen();
+        if (!res.first)
+        {
+            std::cerr << res.second << std::endl;
+            return 1;
+        }
+
+        server.start();
+        server.wait();
+
+        return 0;
+    }
+} // namespace ix