XF 2.0 XF2 FILE vs flysystem

[Snog]

OK, I'm working on add-ons little by little to bring them into full compliance with XF2 development standard, and I wasn't able to find a way to append data to a file using the XF2 FILE system, so I tried the flysystem directly.

This works on my development server (with proper USE statements in class)...

$adapter = new Local('data/mydirectory/', FILE_APPEND);
$fs = new Filesystem($adapter);
$filename = 'my.file';

if($fs->has($filename))
{
    $fs->update($filename, $somecontent);
}
else
{
    $fs->write($filename, $somecontent);
}

Having never used the flysystem and without much info available that I can find, my question is regarding the path. It bothers me that FILE uses the abstracted path to write files, yet I'm declaring a direct path in that code.

Is there a better way to declare/get the path?

 

[Snog]

Nevermind.

Found it myself...

$dataDir = FILE::canonicalizePath($app->config('externalDataPath'));
$adapter = new Local($dataDir . '/mydirectory/', FILE_APPEND);