GNU bug report logs - #25460
26.0.50; Documentation request: Save/write hooks and autosave

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Philipp Stephani <p.stephani2 <at> gmail.com>
Subject: bug#25460: closed (Re: bug#25460: 26.0.50; Documentation request:
 Save/write hooks and autosave)
Date: Fri, 20 Jan 2017 09:04:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#25460: 26.0.50; Documentation request: Save/write hooks and autosave

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 25460 <at> debbugs.gnu.org.

-- 
25460: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=25460
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Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: Philipp Stephani <p.stephani2 <at> gmail.com>
Cc: 25460-done <at> debbugs.gnu.org
Subject: Re: bug#25460: 26.0.50;
 Documentation request: Save/write hooks and autosave
Date: Fri, 20 Jan 2017 11:03:18 +0200

> From: Philipp Stephani <p.stephani2 <at> gmail.com>
> Date: Mon, 16 Jan 2017 19:09:58 +0100
> 
> Please document how {before,after}-save-hook and
> write-{buffer,file}-functions relate to autosave

They don't.  These hooks are only run by basic-save-buffer.

> I noticed that even if auto-save-visited-file-name is t, autosaving
> doesn't run before-save-hook.

I added notes (on the release branch) that these hooks are only run by
save-buffer.

> The documentation should provide some guidance which hook to use
> depending on the value of auto-save-visited-file-name and on whether
> the current save operation is an auto-save or not.

It looks like you consider auto-save-visited-file-name as an option
that makes auto-saving exactly equivalent to saving the buffer.  But
that is far from reality; in fact, as I wrote elsewhere, this option
has subtle issues, so much so that I don't recommend its use at all.
If we want it to be equivalent to saving, we should reimplement it so
that auto-saving uses basic-save-buffer when this option is non-nil.
But that is probably something for a separate bug report, so I'm
closing this one.

[Message part 3 (message/rfc822, inline)]

From: Philipp Stephani <p.stephani2 <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 26.0.50; Documentation request: Save/write hooks and autosave
Date: Mon, 16 Jan 2017 19:09:58 +0100

Please document how {before,after}-save-hook and
write-{buffer,file}-functions relate to autosave, both in the docstrings
of these hooks and in the Emacs Lisp manual.  I noticed that even if
auto-save-visited-file-name is t, autosaving doesn't run
before-save-hook.  The documentation should provide some guidance which
hook to use depending on the value of auto-save-visited-file-name and on
whether the current save operation is an auto-save or not.


In GNU Emacs 26.0.50.28 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.8)
 of 2017-01-13 built on localhost
Repository revision: d018843e0e8065b1c9de9474521db069e1aa0025
Windowing system distributor 'The X.Org Foundation', version 11.0.11501000
System Description:	Ubuntu 14.04 LTS

Recent messages:

Configured using:
 'configure --with-modules --enable-checking
 --enable-check-lisp-object-type 'CFLAGS=-ggdb3 -O0''

Configured features:
XPM JPEG TIFF GIF PNG SOUND GSETTINGS NOTIFY GNUTLS FREETYPE XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 MODULES

Important settings:
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  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

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Memory information:
((conses 16 97629 7213)
 (symbols 48 20220 1)
 (miscs 40 331 181)
 (strings 32 17991 4050)
 (string-bytes 1 592077)
 (vectors 16 14071)
 (vector-slots 8 471819 3575)
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 (intervals 56 207 0)
 (buffers 976 12)
 (heap 1024 22205 1120))

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