Recursive directory code to "expand" Windows drivers that don't want to inject (e.g. Nvidia and AMD video drivers) using Boost (primarily for "filesystem".)

recurse_and_expand.cpp

#include <cstdlib>  // printf
#include <iostream>
#include <string>
#include <boost/filesystem.hpp>
#include <boost/system/error_code.hpp>

// Included due to the MinGW bug which inhibits std::to_string() from being invoked.
// e.g. lexical_cast<string>(example_numeric_var)
#include <boost/lexical_cast.hpp>

using namespace boost;
using namespace std;

// g++ -std=c++1y -static <filename> -I C:\lib\boost C:\lib\boost\stage\lib\libboost_filesystem-mgw48-1_55.a C:\lib\boost\stage\lib\libboost_system-mgw48-1_55.a
// ^ Referenced from: http://wiki.codeblocks.org/index.php?title=BoostWindowsQuickRef

#define EXPAND_DIR "__expand__"
#define MAX_NUM_DIR 500

int main(int argc, char* argv[])
{
    filesystem::path p;
    auto init_path  = filesystem::initial_path();
    int num_of_dirs = 0;

    if (argc < 2) {
        p = filesystem::current_path();
    } else {
        p = (argv[1]);
    }

    for (filesystem::recursive_directory_iterator iter(p), end; iter != end; ++iter) {
        auto path_obj = iter->path();

        if (filesystem::is_directory(path_obj)) {

            if (path_obj.filename() == EXPAND_DIR) {
                continue;
            }

            cout << "I'm a path! @ " << path_obj << " - " << path_obj.filename() << endl;
            ++num_of_dirs;

        } else if (filesystem::is_regular_file(path_obj)) {

            if (path_obj.has_extension() && path_obj.extension() == ".inf") {
                cout << "Found an inf in: " << path_obj.parent_path() << endl;
                auto expand_path = path_obj.parent_path() /= EXPAND_DIR;
                
                // In this context it changes the operating directory 
                // e.g. "Establishes the postcondition, as if by POSIX chdir()."
                filesystem::current_path(path_obj.parent_path());
                filesystem::create_directory(expand_path);
                stringstream cmd;
                cmd << "expand.exe " << "*.*" << " " << expand_path;
                cout << "Command is: " << cmd.str() << endl;

                // Invoke with the "std" namespace due to namespace conflicts with Boost.
                int sys_code = std::system(cmd.str().c_str());
                printf("Expand exit code is: %d\n", sys_code);
                continue;
            }

        }

        if (num_of_dirs >= MAX_NUM_DIR) {
            break;
        }

    }

    printf("Found %d directories fo rizzle!\n", num_of_dirs);

    return 0;
}