From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alex Kost <alezost@gmail.com>
Subject: Re: [PATCH 2/4] emacs: Add 'guix-devel-download-package-source'.
Date: Sun, 04 Oct 2015 16:39:37 +0300
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In-Reply-To: <87d1wvadw2.fsf@gnu.org> ("Ludovic
	\=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\=
	\=\?utf-8\?Q\?s\?\= message of "Sat, 03 Oct 2015 22:35:57 +0200")
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To: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: guix-devel@gnu.org

Ludovic Court=C3=A8s (2015-10-03 23:35 +0300) wrote:

> Alex Kost <alezost@gmail.com> skribis:
>
>> * emacs/guix-devel.el (guix-devel-setup-repl): Use (guix packages) modul=
e.
>>   (guix-devel-download-package-source): New command.
>>   (guix-devel-keys-map): Add key binding for it.
>> * doc/emacs.texi (Emacs Development): Document it.
>
> [...]
>
>> +(defun guix-devel-download-package-source ()
>> +  "Download the source of the current package.
>> +Use this function to compute SHA256 hash of the package source."
>> +  (interactive)
>> +  (guix-devel-with-definition def
>> +    (guix-devel-use-modules "(guix scripts download)")
>> +    (when (or (not guix-operation-confirm)
>> +              (y-or-n-p (format "Download '%s' package source?" def)))
>> +      (guix-geiser-eval-in-repl
>> +       (format "(guix-download (origin-uri (package-source %s)))"
>> +               def)))))
>
> What about instead building the =E2=80=98package-source-derivation=E2=80=
=99 of the
> package?  That way, that would do the exact same thing as =E2=80=98guix b=
uild
> -S=E2=80=99 and would work not only with =E2=80=98url-fetch=E2=80=99 but =
also with the other
> things.
>
> WDYT?

The goal of this command is to display a hash.  At first I also thought
about building a package source and then to calculate the hash of the
store file, but this way will lead to the wrong hashes for "snippet"-ed
origins.  Or do I miss anything?

--=20
Alex