Method RealPath

common/FileSystem.cpp:288–471

}

std::string Path::RealPath(const std::string_view path)
{
	// Resolve non-absolute paths first.
	std::vector<std::string_view> components;
	// We need to keep the full combined path in scope
	// as SplitNativePath() returns string_views to it.
	std::string buf;
	if (!IsAbsolute(path))
	{
		buf = Path::Combine(FileSystem::GetWorkingDirectory(), path);
		components = Path::SplitNativePath(buf);
	}
	else
		components = Path::SplitNativePath(path);

	std::string realpath;
	if (components.empty())
		return realpath;

	// Different to path because relative.
	realpath.reserve(std::accumulate(components.begin(), components.end(), static_cast<size_t>(0),
						 [](size_t l, const std::string_view& s) { return l + s.length(); }) +
					 components.size() + 1);

#ifdef _WIN32
	std::wstring wrealpath;
	std::vector<WCHAR> symlink_buf;
	wrealpath.reserve(realpath.size());
	symlink_buf.resize(path.size() + 1);

	// Check for any symbolic links throughout the path while adding components.
	const bool skip_first = IsUNCPath(path);
	bool test_symlink = true;
	for (const std::string_view& comp : components)
	{
		if (!realpath.empty())
		{
			realpath.push_back(FS_OSPATH_SEPARATOR_CHARACTER);
			realpath.append(comp);
		}
		else if (skip_first)
		{
			realpath.append(comp);
			continue;
		}
		else
		{
			realpath.append(comp);
		}
		if (test_symlink)
		{
			DWORD attribs;
			if (FileSystem::GetWin32Path(&wrealpath, realpath) &&
				(attribs = GetFileAttributesW(wrealpath.c_str())) != INVALID_FILE_ATTRIBUTES)
			{
				// if not a link, go to the next component
				if (attribs & FILE_ATTRIBUTE_REPARSE_POINT)
				{