feat(rocksdb): add rocksdb instance to compile

CMakeLists.txt

@@ -107,6 +107,7 @@ include(cmake/llhttp.cmake)
 include(cmake/fmt.cmake)
 include(cmake/spdlog.cmake)
 include(cmake/folly.cmake)
+include(cmake/rocksdb.cmake)
 
 
 ADD_SUBDIRECTORY(src/pstd)

cmake/rocksdb.cmake

@@ -0,0 +1,14 @@
+# Copyright (c) 2023-present, Qihoo, Inc.  All rights reserved.
+# This source code is licensed under the BSD-style license found in the
+# LICENSE file in the root directory of this source tree. An additional grant
+# of patent rights can be found in the PATENTS file in the same directory.
+include_guard()
+
+FetchContent_Declare(
+        rocksdb
+        GIT_REPOSITORY https://github.com/facebook/rocksdb.git
+        GIT_TAG v8.6.7
+)
+
+FetchContent_MakeAvailable(rocksdb)
+include_directories(${rocksdb_SOURCE_DIR}/include)

src/pikiwidb.cc

@@ -16,6 +16,7 @@
 #include <thread>
 
 #include "log.h"
+#include "rocksdb/db.h"
 
 #include "client.h"
 #include "command.h"
@@ -292,6 +293,7 @@ static void InitLogs() {
 }
 
 int main(int ac, char* av[]) {
+  [[maybe_unused]] rocksdb::DB* db;
   g_pikiwidb = std::make_unique<PikiwiDB>();
   pstd::InitRandom();
   InitSignal();