> Why that? `shell-command-to-string' works also on remote hosts.

That wasn't clear from the documentation and I haven't tried it out :(
Anyway, I've attached a new, simplified version.
However, now I wonder whether project--remote-file-name would be more
useful if it would derive the remote-id from default-directory.  Or
should I simply eliminate this helper function altogether?

Thanks,
Felicián