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Local development

To run the code for your challenge locally, you’ll need vcpkg & make installed. You’ll also need the VCPKG_ROOT environment variable set to the path where vcpkg is installed. The script for your challenge (like ./your_sqlite3.sh) will automatically compile your code using the rules defined in CMakeLists.txt before executing it. It’ll look something like this: 
#!/bin/sh

set -e
cmake -B build -S . -DCMAKE_TOOLCHAIN_FILE=${VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake
cmake --build ./build
exec ./build/server "$@"

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File structure

  • The files for your solution are placed in the src/ directory.
  • src/Main.cpp contains the main function, which is what the test runner executes.
  • CMakeLists.txt contains the rules for compiling your program.

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Adding more files

You can add more files and directories to src/. The test runner will include them when compiling your code. For example, if you want to create a function foo() in another file, you need to:
  1. Add a header file Foo.hpp and define foo() there.
  2. Add a cpp file Foo.cpp and implement foo() there.
// Function definitions go here
#pragma once

void foo();
The #pragma once directive in src/Foo.hpp ensures the header file is included only once during compilation.

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Adding dependencies

To add a third-party dependency such as the asio to a C++ project, follow these steps:
1

Add the dependency to vcpkg.json

Run vcpkg add port asio to add the dependency to the vcpkg.json file.
2

Add the dependency to CMakeLists.txt

To be able to use the dependency in your project, you’ll need to add it to CMakeLists.txt.
find_package(asio CONFIG REQUIRED)
target_link_libraries(server PRIVATE asio asio::asio)
3

Include the dependency in your code

You can now include the dependency in your code.
#include <asio.hpp>
On your next push, the test runner will automatically install the dependency before compiling your code.