How to reset filesystem::current_path() in C++17?

Question

I am writing a C++ program in which I change the working directory with std::filesystem::current_path(working_directory), where working_directory is a string. Is there a good way to, later in the program, reset the working directory to its original value? I understand that one solution would be to use a variable string initial_directory = std::filesystem::current_path() before I change the working directory and then later reset it with std::filesystem::current_path(initial_directory), but I feel like there should be a more elegant solution.

Thanks!

Answer 1

DIY?

#include <iostream>
#include <filesystem>
#include <stack>

static std::stack<std::filesystem::path> s_path;
void pushd(std::filesystem::path path) {
    s_path.push(std::filesystem::current_path());
    std::filesystem::current_path(path);
}
void popd() {
    if (!s_path.empty()) {
        std::filesystem::current_path(s_path.top());
        s_path.pop();
    }
}

int main()
{
    std::cout << "Current path is " << std::filesystem::current_path() << '\n';
    pushd(std::filesystem::temp_directory_path());
    std::cout << "Current path is " << std::filesystem::current_path() << '\n';
    popd();
    std::cout << "Current path is " << std::filesystem::current_path() << '\n';
    popd();
    std::cout << "Current path is " << std::filesystem::current_path() << '\n';
}