[emacs-berlin] `server-eval-at' turns out to be pretty useful...

[Grant Rettke]

Here is how it works for me:

✔ gsmac:~/src/be2 [main|✚ 2]> emacsclient
--socket-name="/Users/gcr/server-sockets/emacs.sock" --eval 'emacs-version'
OK...

-emacs-pid 9230
-print "26.3"
✔ gsmac:~/src/be2 [main|✚ 2]> emacs --batch --eval "(progn (require
'server) (princ (server-eval-at \"/Users/gcr/server-sockets/emacs.sock\"
'emacs-version)))"
OK...

26.3
✔ gsmac:~/src/be2 [main|✚ 2]>

I just want the value 26.3 not the -emacs-pid and -print stuff.

I can't wait to try this on v27.

On Fri, Apr 2, 2021 at 3:24 PM Grant Rettke <grant at wisdomandwonder.com>
wrote:

> Forgot to share this is what it does on my machine:
>
> ---
> emacsclient --socket-name="/Users/gcr/server-sockets/emacs.sock" --eval
> "(+ 1 1)"
> OK...
>
> -emacs-pid 9230
> -print 2
> ---
> emacsclient --socket-name="/Users/gcr/server-sockets/emacs.sock" --eval
> "emacs-version"
> OK...
>
> -emacs-pid 9230
> -print "26.3"
> ---
> emacsclient --socket-name="/Users/gcr/server-sockets/emacs.sock" --eval
> '(with-current-buffer "*scratch*" (insert "Hello scratch buffer"))'
> OK...
>
> -emacs-pid 9230
> -print nil
> ---
>
> Want to bet that it is because I'm on Emacs 26?
>
> On Fri, Apr 2, 2021 at 2:37 PM Grant Rettke <grant at wisdomandwonder.com>
> wrote:
>
>> My computer is trying to drive insane. That is what is happening here.
>> And it is working.
>>
>> It has to be working wrong on my machine.
>>
>> Thanks for sharing that Til.
>>
>> On Fri, Apr 2, 2021 at 7:09 AM Tilmann Singer <tils at tils.net> wrote:
>>
>>> I might be missing something obvious, but what exactly is it that
>>> emacsclient can not do? With a running Emacs instance in which
>>> (server-start) has been called before, the following commands on a
>>> terminal with the bash shell work out of the box for me:
>>>
>>> $ emacsclient -e "(+ 1 1)"
>>> 2
>>>
>>> $ printf "How many is binary? $(emacsclient -e '(+ 1 1)')\n"
>>> How many is binary? 2
>>>
>>> $ emacsclient -e 'emacs-version'
>>> "27.2"
>>>
>>> $ emacsclient -e '(with-current-buffer "*scratch*" (insert "Hello
>>> scratch buffer"))'
>>> nil
>>> => Text was inserted into buffer *scratch*
>>>
>>>
>>> At least on this (arch) linux machine, the default server-socket-dir of
>>> "/run/user/1000/emacs" seems to be working fine.
>>>
>>>
>>> Til
>>>
>>
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