Alan Third <alan@idiocy.org> schrieb am Di., 6. Feb. 2018 um 19:56 Uhr:

> On Tue, Feb 06, 2018 at 04:27:40PM +0100, Mikhail Gusarov wrote:
> > Yes, it is. I can't find the relevant sources right away, but opening a
> > file inside a file is a syntax for opening  resource forks under OS X,
> > so `/foo/bar/baz/.` is a "directory" of resource forks there. This
> > syntax is not likely to go away anytime soon.
>
> Hmm, perhaps this method of checking for a directory just won’t ever
> work reliably on macOS then.
>
>
But it works reliable in all isolated test cases that I've tried. Only the
combination with call-process seems to cause issues for some weird reason.