init [skip ci]

.codecrafters/compile.sh

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+#!/bin/sh
+#
+# This script is used to compile your program on CodeCrafters
+#
+# This runs before .codecrafters/run.sh
+#
+# Learn more: https://codecrafters.io/program-interface
+
+set -e # Exit on failure
+
+cmake -B build -S . -DCMAKE_TOOLCHAIN_FILE=${VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake
+cmake --build ./build

.codecrafters/run.sh

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+#!/bin/sh
+#
+# This script is used to run your program on CodeCrafters
+#
+# This runs after .codecrafters/compile.sh
+#
+# Learn more: https://codecrafters.io/program-interface
+
+set -e # Exit on failure
+
+exec ./build/server "$@"

.gitattributes

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+* text=auto

.gitignore

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+# Prerequisites
+*.d
+
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+server
+
+# CMake
+CMakeLists.txt.user
+CMakeCache.txt
+CMakeFiles
+CMakeScripts
+Testing
+Makefile
+cmake_install.cmake
+install_manifest.txt
+compile_commands.json
+CTestTestfile.cmake
+_deps
+
+build/
+vcpkg_installed

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.13)
+
+project(redis-starter-cpp)
+
+file(GLOB_RECURSE SOURCE_FILES src/*.cpp)
+
+set(CMAKE_CXX_STANDARD 23) # Enable the C++23 standard
+set(THREADS_PREFER_PTHREAD_FLAG ON)
+
+find_package(Threads REQUIRED)
+find_package(asio CONFIG REQUIRED)
+
+add_executable(server ${SOURCE_FILES})
+
+target_link_libraries(server PRIVATE asio asio::asio)
+target_link_libraries(server PRIVATE Threads::Threads)

README.md

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+[![progress-banner](https://backend.codecrafters.io/progress/redis/f0888919-26c3-46fb-9854-4f2e891af515)](https://app.codecrafters.io/users/codecrafters-bot?r=2qF)
+
+This is a starting point for C++ solutions to the
+["Build Your Own Redis" Challenge](https://codecrafters.io/challenges/redis).
+
+In this challenge, you'll build a toy Redis clone that's capable of handling
+basic commands like `PING`, `SET` and `GET`. Along the way we'll learn about
+event loops, the Redis protocol and more.
+
+**Note**: If you're viewing this repo on GitHub, head over to
+[codecrafters.io](https://codecrafters.io) to try the challenge.
+
+# Passing the first stage
+
+The entry point for your Redis implementation is in `src/Server.cpp`. Study and
+uncomment the relevant code, and push your changes to pass the first stage:
+
+```sh
+git commit -am "pass 1st stage" # any msg
+git push origin master
+```
+
+That's all!
+
+# Stage 2 & beyond
+
+Note: This section is for stages 2 and beyond.
+
+1. Ensure you have `cmake` installed locally
+1. Run `./your_program.sh` to run your Redis server, which is implemented in
+   `src/Server.cpp`.
+1. Commit your changes and run `git push origin master` to submit your solution
+   to CodeCrafters. Test output will be streamed to your terminal.

codecrafters.yml

@@ -0,0 +1,11 @@
+# Set this to true if you want debug logs.
+#
+# These can be VERY verbose, so we suggest turning them off
+# unless you really need them.
+debug: false
+
+# Use this to change the C++ version used to run your code
+# on Codecrafters.
+#
+# Available versions: cpp-23
+language_pack: cpp-23

src/Server.cpp

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+#include <iostream>
+#include <cstdlib>
+#include <string>
+#include <cstring>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+int main(int argc, char **argv) {
+  // Flush after every std::cout / std::cerr
+  std::cout << std::unitbuf;
+  std::cerr << std::unitbuf;
+  
+  int server_fd = socket(AF_INET, SOCK_STREAM, 0);
+  if (server_fd < 0) {
+   std::cerr << "Failed to create server socket\n";
+   return 1;
+  }
+  
+  // Since the tester restarts your program quite often, setting SO_REUSEADDR
+  // ensures that we don't run into 'Address already in use' errors
+  int reuse = 1;
+  if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0) {
+    std::cerr << "setsockopt failed\n";
+    return 1;
+  }
+  
+  struct sockaddr_in server_addr;
+  server_addr.sin_family = AF_INET;
+  server_addr.sin_addr.s_addr = INADDR_ANY;
+  server_addr.sin_port = htons(6379);
+  
+  if (bind(server_fd, (struct sockaddr *) &server_addr, sizeof(server_addr)) != 0) {
+    std::cerr << "Failed to bind to port 6379\n";
+    return 1;
+  }
+  
+  int connection_backlog = 5;
+  if (listen(server_fd, connection_backlog) != 0) {
+    std::cerr << "listen failed\n";
+    return 1;
+  }
+  
+  struct sockaddr_in client_addr;
+  int client_addr_len = sizeof(client_addr);
+  std::cout << "Waiting for a client to connect...\n";
+
+  // You can use print statements as follows for debugging, they'll be visible when running tests.
+  std::cout << "Logs from your program will appear here!\n";
+
+  // Uncomment this block to pass the first stage
+  // 
+  // accept(server_fd, (struct sockaddr *) &client_addr, (socklen_t *) &client_addr_len);
+  // std::cout << "Client connected\n";
+  // 
+  // close(server_fd);
+
+  return 0;
+}

vcpkg-configuration.json

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+{
+  "default-registry": {
+    "kind": "git",
+    "baseline": "c4af3593e1f1aa9e14a560a09e45ea2cb0dfd74d",
+    "repository": "https://github.com/microsoft/vcpkg"
+  },
+  "registries": [
+    {
+      "kind": "artifact",
+      "location": "https://github.com/microsoft/vcpkg-ce-catalog/archive/refs/heads/main.zip",
+      "name": "microsoft"
+    }
+  ]
+}

vcpkg.json

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+{
+  "dependencies": [
+    "asio",
+    "pthreads"
+  ]
+}

your_program.sh

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+#!/bin/sh
+#
+# Use this script to run your program LOCALLY.
+#
+# Note: Changing this script WILL NOT affect how CodeCrafters runs your program.
+#
+# Learn more: https://codecrafters.io/program-interface
+
+set -e # Exit early if any commands fail
+
+# Copied from .codecrafters/compile.sh
+#
+# - Edit this to change how your program compiles locally
+# - Edit .codecrafters/compile.sh to change how your program compiles remotely
+(
+  cd "$(dirname "$0")" # Ensure compile steps are run within the repository directory
+  cmake -B build -S . -DCMAKE_TOOLCHAIN_FILE=${VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake
+  cmake --build ./build
+)
+
+# Copied from .codecrafters/run.sh
+#
+# - Edit this to change how your program runs locally
+# - Edit .codecrafters/run.sh to change how your program runs remotely
+exec ./build/server "$@"