Here it is an example:

Copy ls from /bin/ and name it lss.

Then:

;; works
(let ((default-directory "<remote-path>"))
  (executable-find "lss" 'remote))

;; does not work
(let ((default-directory "<remote-path>"))
  (executable-find "/bin/lss" 'remote))

Thanks,
Ivan

On Sat, Jun 20, 2020 at 9:23 PM yyoncho <yyoncho@gmail.com> wrote:

> Hi Michael,
>
> The examples that do not work on my side are when using a full
> file path when the binary is not on remote PATH.
>
> Thanks,
> Ivan
>
> On Sat, Jun 20, 2020 at 8:43 PM Michael Albinus <michael.albinus@gmx.de>
> wrote:
>
>> yyoncho <yyoncho@gmail.com> writes:
>>
>> > Hi Michael,
>>
>> Hi Ivan,
>>
>> > Can you comment on remote flag mentioned by Philip as well?
>> >
>> > Here it is the docs for it:
>> >
>> > REMOTE is non-nil, search on the remote host indicated by
>> > `default-directory' instead.
>>
>> Right, I forgot this. Sorry. So let's go back to your question:
>>
>> >> As part of investigating
>> >> https://github.com/emacs-lsp/lsp-mode/issues/1688 I noticed that
>> >> executable-find does not return the binary when it is not on the
>> >> remote PATH(or at least this is what I see) even if you specify the
>> >> full path to the binary. Can you comment if this is the expected
>> >> behaviour?
>>
>> The crucial point is `default-directory'. In my local environment, I
>> have for example
>>
>> --8<---------------cut here---------------start------------->8---
>> (let ((default-directory "/tmp"))
>>   (executable-find "emacs"))
>> "/usr/local/bin/emacs"
>>
>> (let ((default-directory "/tmp"))
>>   (executable-find "emacs" 'remote))
>> "/usr/local/bin/emacs"
>>
>> (let ((default-directory "/ssh:ford:"))
>>   (executable-find "emacs"))
>> "/usr/local/bin/emacs"
>>
>> (let ((default-directory "/ssh:ford:"))
>>   (executable-find "emacs" 'remote))
>> "/opt/bin/emacs"
>> --8<---------------cut here---------------end--------------->8---
>>
>> You get the remote path only if `default-directory' is a remote file
>> name, and the REMOTE argument of `executable-find' is non-nil. And this
>> is understandable: if `default-directory' is not a remote file name,
>> `executable-find' does not know which remote host it shall use for search.
>>
>> > Thanks,
>> > Ivan
>>
>> Best regards, Michael.
>>
>