Script using Conan2 as a package manager for third-party libraries

cMakeLists.txt

cmake_minimum_required(VERSION 3.15)
project(Conan-Test)

# use C++20
set(CMAKE_CXX_STANDARD 20)

# autocomplete with YCM
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
set(CMAKE_BUILD_TYPE Release)

# dependencies installed with conan
find_package(fmt REQUIRED)
find_package(cpr REQUIRED)
find_package(nlohmann_json REQUIRED)
find_package(SQLiteCpp REQUIRED)

add_executable(${PROJECT_NAME} src/main.cpp)
target_link_libraries(${PROJECT_NAME} fmt::fmt cpr::cpr nlohmann_json::nlohmann_json SQLiteCpp)

Conan2-Test.md

Setup

• Conan2 was installed on Archlinux by building its AUR package.
• We follow Conan's official docs to setup CMake to use Conan:

$ conan install conanfile.txt --output-folder=build --build=missing
$ cd build
$ cmake -DCMAKE_TOOLCHAIN_FILE="conan_toolchain.cmake" ..
$ make -j

conanfile.txt

[requires]
fmt/10.2.1
cpr/1.10.5
nlohmann_json/3.11.3
sqlitecpp/3.3.1

[generators]
CMakeDeps
CMakeToolchain

main.cpp

// file: src/main.cpp

#include <iostream>
#include <SQLiteCpp/Database.h>
#include <SQLiteCpp/Statement.h>
#include <SQLiteCpp/SQLiteCpp.h>
#include <fmt/core.h>
#include <fmt/color.h>
#include <cpr/cpr.h>
#include <nlohmann/json.hpp>

using namespace nlohmann;

/* Fetch user details using a GET HTTP request & save them to a table in an sqlite database */
int main(int argc, char** argv) {
  if (argc != 2) {
    std::cout << "USAGE: " << argv[0] << " <GITHUB-USERNAME> " << '\n';
    return 1;
  }

  // fetch user from github
  std::string username = argv[1];
  std::string url = "https://api.github.com/users/" + username;
  cpr::Response r = cpr::Get(cpr::Url(url));
  json res = json::parse(r.text);
  std::string name = res["name"];
  std::string login = res["login"];

  fmt::print(fg(fmt::color::crimson) | fmt::emphasis::bold, "User '{}' fetched from Github!\n", name);

  // insert fetched user into database (table users must exist beforehand)
  SQLite::Database db("database.db", SQLite::OPEN_READWRITE);
  SQLite::Transaction transaction(db);

  SQLite::Statement query(db, "INSERT INTO users(name, login) VALUES (?, ?)");
  query.bind(1, name);
  query.bind(2, login);
  query.exec();

  transaction.commit();

  fmt::print(fg(fmt::color::crimson) | fmt::emphasis::bold, "User inserted into databas\n");

  return 0;
}