GNU bug report logs - #62609
29.0.60; [PATCH] src/comp.c: New variable `comp-el-to-eln-strip-prefix` for `comp-el-to-eln-rel-filename`

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: lin Sun <sunlin7 <at> yahoo.com>
Subject: bug#62609: closed (Re: 29.0.60; [PATCH] src/comp.c: New variable
 `comp-el-to-eln-strip-prefix` for `comp-el-to-eln-rel-filename`)
Date: Mon, 03 Apr 2023 14:38:03 +0000

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Your bug report

#62609: 29.0.60; [PATCH] src/comp.c: New variable `comp-el-to-eln-strip-prefix` for `comp-el-to-eln-rel-filename`

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 62609 <at> debbugs.gnu.org.

-- 
62609: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=62609
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Andrea Corallo <akrl <at> sdf.org>
Cc: 62609-done <at> debbugs.gnu.org, sunlin7 <at> yahoo.com
Subject: Re: 29.0.60; [PATCH] src/comp.c: New variable
 `comp-el-to-eln-strip-prefix` for `comp-el-to-eln-rel-filename`
Date: Mon, 03 Apr 2023 17:37:26 +0300

tags 62609 wontfix
thanks

> From: Andrea Corallo <akrl <at> sdf.org>
> Cc: lin Sun <sunlin7 <at> yahoo.com>, 62609 <at> debbugs.gnu.org
> Date: Mon, 03 Apr 2023 14:08:36 +0000
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> >> From: lin Sun <sunlin7 <at> yahoo.com>
> >> Date: Mon, 3 Apr 2023 00:53:18 +0000
> >> 
> >> You're right, the patch will allow to relocate/copy an elisp source folder from
> >> /home/userA/.emacs.d/epla/**.el to
> >> /home/userB/.emacs.d/epla/**.el.
> >> So the patch should be the
> >> "0002-New-variable-comp-el-to-eln-strip-prefix-for-comp-el.patch"
> >> attached in this email.
> >> 
> >> And agree with you, it's dangerous when this variable is configured
> >> with an arbitrary value.
> >> So please feel free to close this ticket. Thanks
> >
> > I'd like to hear what Andrea thinks about this, before I decide
> > whether to close.
> 
> Hi all,
> 
> I agree we should not add a new knob in order to move eln-cache without
> moving the source *.el.  The use-case sounds like a corner case and this
> new variable would be IMO very sensitive to miss configurations.

OK, so closing.

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From: lin Sun <sunlin7 <at> yahoo.com>
To: "bug-gnu-emacs <at> gnu.org" <bug-gnu-emacs <at> gnu.org>,
 Eli Zaretskii <eliz <at> gnu.org>
Subject: 29.0.60;
 [PATCH] src/comp.c: New variable `comp-el-to-eln-strip-prefix`
 for `comp-el-to-eln-rel-filename`
Date: Sun, 2 Apr 2023 05:13:28 +0000

[Message part 4 (text/plain, inline)]

Hi,

The emacs with native compile enabled will always rebuild all the
~/.emacs.d/eln-cache/VER/*.eln files if I moved/copied eln-cache
folder from
/home/userA/.emacs.d/eln-cache/ to
/home/userB/.emacs.d/eln-cache/.

It is caused by the function `comp-el-to-eln-rel-filename` calculating
the hash value from the absolute *.el filename to be the middle of the
eln file name.

The new variable `comp-el-to-eln-strip-prefix` in this patch will
allow moving the eln-cache/ folder without rebuilding *.eln in it.

Please help review this change, Thanks

Best Regards
Lin

[0001-New-variable-comp-el-to-eln-strip-prefix-for-comp-el.patch (text/x-patch, attachment)]

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