bug#44701: closed (28.0.50; [feature/native-comp] Use file-truename when building eln path hash)

[GNU bug Tracking System]

Your message dated Wed, 18 Nov 2020 20:57:55 +0000
with message-id <xjfeekqbcx8.fsf@sdf.org>
and subject line Re: bug#44701: 28.0.50; [feature/native-comp] Use 
file-truename when building eln path hash
has caused the debbugs.gnu.org bug report #44701,
regarding 28.0.50; [feature/native-comp] Use file-truename when building eln 
path hash
to be marked as done.

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44701: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=44701
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> --- Begin Message ---
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> Subject: 
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> 28.0.50; [feature/native-comp] Use file-truename when building eln path hash
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> Date: 
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> Mon, 16 Nov 2020 20:03:15 -0800
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> It appears that `comp-el-to-eln-filename` uses `expand-file-name` to
> determine the absolute filename to
> hash. When the filename is a symlink, this results in a cache miss
> depending on which path is loaded.
>
> `file-truename' would be the equivalent to `(expand-file-name name
> nil)`, except that it would resolve to a
> single canonical path (in the absence of hardlinks, which is pathological).
>
> If I may ask, what is the purpose behind the path component of the
> hash? I would think a content hash
> would suffice to disambiguate files in the .el<->.eln bijection.
>
> Thanks,
> Tad
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>
>
> --- End Message ---
> --- Begin Message ---
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> Subject: 
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> Re: bug#44701: 28.0.50; [feature/native-comp] Use file-truename when building eln path hash
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> Date: 
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> Wed, 18 Nov 2020 20:57:55 +0000
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> User-agent: 
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> Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)
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> Tad <tadfisher@gmail.com> writes:
>
> > This makes it possible to load AOT-compiled .eln files from the Nix
> > store, so thank you for implementing this change.
>
> That's good to hear!  Thank you for reporting, closing.
>
>   Andrea
>
>
> --- End Message ---