cd.cpp

#include "cd.h"
#include <filesystem>
#include <string>

namespace fs = std::filesystem;

std::string changeDir(const std::string& givenPath) {
    fs::path newPath;

    if (givenPath == ".") {
        return "";
    } else if (givenPath == "..") {
        newPath = fs::current_path().parent_path();
    } else {
        newPath = fs::absolute(givenPath);
    }

    if (newPath.empty() || !fs::exists(newPath)) {
        return "cd: No such file or directory\n";
    }

    try {
        fs::current_path(newPath);
    } catch (fs::filesystem_error& e) {
        return std::string("cd: ") + e.what() + "\n";
    }

    return "";  // success
}