Coding systems in emacsclient (or, apostrophe's woes...)

Coding systems in emacsclient (or, apostrophe's woes...)

[Juanma Barranquero]

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C:\> emacsclient --server-file=whatever --eval "(nonexistent)"
*ERROR*: Symbol’s function definition is VOID: nonexistent

That's obviously UTF-8; if I change my console's codepage to 65001

*ERROR*: Symbol’s function definition is VOID: nonexistent

But that's not what puzzles me. What I don't understand is how that message
is defined in data.c using an APOSTROPE (#x27), but emacsclient is
receiving a RIGHT SINGLE QUOTATION MARK (#x2019).

Where is that change happening?

As an aside, perhaps it would be nice to have a way (a -coding command or
whatever) for emacsclient to tell server.el its output coding system...

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Re: Coding systems in emacsclient (or, apostrophe's woes...)

[Eli Zaretskii]

> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Sat, 19 Nov 2022 20:13:25 +0100
> 
> C:\> emacsclient --server-file=whatever --eval "(nonexistent)"
> *ERROR*: Symbol’s function definition is VOID: nonexistent
> 
> That's obviously UTF-8; if I change my console's codepage to 65001
> 
> *ERROR*: Symbol’s function definition is VOID: nonexistent

By sheer coincidence, I've just fixed that a few minutes ago.

> But that's not what puzzles me. What I don't understand is how that message is defined in data.c using an
> APOSTROPE (#x27), but emacsclient is receiving a RIGHT SINGLE QUOTATION MARK (#x2019).

That's quoting-style for you.

> As an aside, perhaps it would be nice to have a way (a -coding command or whatever) for emacsclient to
> tell server.el its output coding system...

When is it not the locale-coding-system for messages and file-name-coding-system
for file names?

Re: Coding systems in emacsclient (or, apostrophe's woes...)

[Andreas Schwab]

On Nov 19 2022, Juanma Barranquero wrote:

> Where is that change happening?

Look for text-quoting-style.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."

Re: Coding systems in emacsclient (or, apostrophe's woes...)

[Juanma Barranquero]

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On Sat, Nov 19, 2022 at 8:39 PM Eli Zaretskii <eliz@gnu.org> wrote:

> By sheer coincidence, I've just fixed that a few minutes ago.

Great.

> That's quoting-style for you.

I didn't know about text-quoting-style.

> When is it not the locale-coding-system for messages and
file-name-coding-system
> for file names?

I don't know. emacsclient can be used to talk to remote instances of Emacs.
Do they know the (locale|file-name)-coding system for the emacsclient that
contacts them?

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Re: Coding systems in emacsclient (or, apostrophe's woes...)

[Juanma Barranquero]

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On Sat, Nov 19, 2022 at 8:40 PM Andreas Schwab <schwab@linux-m68k.org>
wrote:

> Look for text-quoting-style.

Thanks. I thought quoting style was for buffer content, not output of
message, etc.

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Re: Coding systems in emacsclient (or, apostrophe's woes...)

[Eli Zaretskii]

> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Sat, 19 Nov 2022 21:58:21 +0100
> Cc: emacs-devel@gnu.org
> 
> > When is it not the locale-coding-system for messages and file-name-coding-system
> > for file names?
> 
> I don't know. emacsclient can be used to talk to remote instances of Emacs. Do they know the
> (locale|file-name)-coding system for the emacsclient that contacts them?

If you are thinking about remote client connections, the solution for that
is not easy.  emacsclient is a relatively simple program that has none of
the machinery we have in Emacs for determining the suitable encoding.  How
do you envision the client will know what encoding the server should use?
If it cannot know that, how will it populate the new directive you have in
mind?

Re: Coding systems in emacsclient (or, apostrophe's woes...)

[Eli Zaretskii]

> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Sat, 19 Nov 2022 21:59:39 +0100
> Cc: Emacs developers <emacs-devel@gnu.org>
> 
> > Look for text-quoting-style.
> 
> Thanks. I thought quoting style was for buffer content, not output of message, etc.

On the contrary, it is mostly used for messages and message-like buffers,
like *Help* etc.