Improve FileUtils removeDirectory implementation for android

[aryamansingh2008]

How much do you want sponsor somebody to solve this feature: $0

Is your feature request related to a problem? Please describe.
The FileUtils::removeDirectory method makes a system call to delete the directory. This invokes a separate process and comes with command line interpretation of the command, which makes this slow.

Describe the solution you'd like
Can we use std::filesystem::remove_all instead to achieve this? To my knowledge, it is cross platform and should perform better than making a system call.

Code Snippet

bool FileUtils::removeDirectory(std::string_view path) const
{
# if !defined(AX_TARGET_OS_TVOS)

# if (AX_TARGET_PLATFORM != AX_PLATFORM_ANDROID)
if (nftw(path.data(), unlink_cb, 64, FTW_DEPTH | FTW_PHYS) == -1)
return false;
else
return true;
# else
std::string command = "rm -r ""s;
// Path may include space.
command.append(path).append(""", 1);
if (system(command.c_str()) >= 0)
return true;
else
return false;
# endif // (AX_TARGET_PLATFORM != AX_PLATFORM_ANDROID)

# else
return false;
# endif // !defined(AX_TARGET_OS_TVOS)
}

Suggested Improvement

bool FileUtils::removeDirectory(std::string_view path) const
{
# if !defined(AX_TARGET_OS_TVOS)

# if (AX_TARGET_PLATFORM != AX_PLATFORM_ANDROID)
if (nftw(path.data(), unlink_cb, 64, FTW_DEPTH | FTW_PHYS) == -1)
return false;
else
return true;
# else
std::error_code ec;
std::filesystem::remove_all(path, ec);
return !ec;
# endif // (AX_TARGET_PLATFORM != AX_PLATFORM_ANDROID)

# else
return false;
# endif // !defined(AX_TARGET_OS_TVOS)
}