Philipp <p.stephani2@gmail.com> writes:

Hi Philipp,

> 1. emacs -Q
> 2. C-x d /ssh:some-remote-host:/some/dir RET
> 3. Mark any file with `m'
> 4. A . RET
>
> Expected: File is searched for regex `.'
> Actual: user-error: Search failed with status 1: find: ‘/ssh:some-remote-host:/some/dir/file’: No such file or directory

Yep, same behaviour here.

> This is probably because `xref-collect-matches' calls
> `call-process-shell-command', which doesn't work remotely.  It should
> call `process-file-shell-command' instead.

Yes, this must be changed. But the file name needs some massage, too.

The appended patch fixes this for me. But since I don't know xref.el in
detail, I fear I introduce collateral damages. At least a second opinion
about the patch would be welcome, before I commit it to master.

Best regards, Michael.