scan a folder recursive and write the filenames with his size to a CSV file

file_list.cpp

#include <iostream>
#include <filesystem>
#include <string>
#include <fstream>

namespace fs = std::filesystem;

using std::cout;

const std::string outFilePath = "/home/allapow/Downloads/fileAudit.csv";

int main(int argc, char *argv[]) {
    if (argc != 2) {
        fprintf(stderr, "Usage: fileAudit directory\n");
        return (1);
    }
    cout << "working directory: " << fs::current_path() << "\n";
    cout << "   scan directory: " << argv[1] << "\n";

    std::string path, outFilename(outFilePath);
    std::fstream outfile;
    fs::path scannPath(argv[1]);
    try {
        path = fs::canonical(scannPath);
    } catch (std::exception &ex) {
        cout << "Path does not exist: " << scannPath << "\nthrew exception:\n" << ex.what() << "\n";
        return (1);
    }
    cout << "scan path (canonical): " << path << "\n";

    outfile.open(outFilename, std::ios_base::out);
    if (!outfile.is_open()) {
        cout << "failed to open " << outFilename << '\n';
        return (1);
    }

    outfile << R"("bytes";"filename")" << std::endl;
    // Iterate over the `std::filesystem::directory_entry` elements explicitly
    for (const fs::directory_entry &dir_entry: fs::recursive_directory_iterator(path)) {
        if (!fs::is_directory(dir_entry)) {
            outfile << "\"" << fs::file_size(dir_entry.path()) << "\";" << dir_entry.path() << std::endl;
        }
    }
    outfile.close();
    return 0;
}

void unusedStuff(fs::path *scannPath) {
    /**
     * Iterate with recursive_directory_iterator
     */
    fs::recursive_directory_iterator di(*scannPath), ende;
    while (di != ende) {
        for (int i = 0; i < di.depth(); ++i) {
            std::cout << " |  ";
        }
        std::cout << " |-- " << di->path().filename().string() << "\n";
        ++di;
    }
    std::cout << "-----------------------------\n";
    /**
     * Iterate over the `std::filesystem::directory_entry` elements using `auto`
     */
    for (auto const &dir_entry: fs::recursive_directory_iterator("/my/path")) {
        std::cout << dir_entry << '\n';
    }
}