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From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: The problem of "guix build emacs --with-source=./emacs"
Date: Fri, 13 Nov 2015 09:44:01 +0100
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In-Reply-To: <87k2pmvqpk.fsf@codemac.net> (Jeff Mickey's message of "Thu, 12
	Nov 2015 13:43:35 -0800")
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To: Jeff Mickey <j@codemac.net>
Cc: guix-devel@gnu.org

Jeff Mickey <j@codemac.net> skribis:

> Forgot to CC the list...
>
> * Ludovic Court=C3=A8s <ludo@gnu.org> [2015-11-12 04:49]:
>> tumashu <tumashu@163.com> skribis:
>>
>>> When I use the below command to build emacs from emacs.git
>>>
>>>     guix build emacs --with-source=3D./emacs               (emacs dir i=
s git repo)
>>>
>>> Build fail, after i remove the .git, build success.
>>
>> Could you explain how it fails exactly, and post the tail of the
>> build log?
>>
>>> The repo of emacs.git is 1.5G, is it the reason?
>>
>> I don=E2=80=99t think so.  That certainly makes it a bad option, though.
>>
>> Thanks,
>> Ludo=E2=80=99.
>
> Isn't the emacs/.git dir is included in the hash calculation if it's
> left in there?

Yes.

> I believe that guix calculates these hashes without the .git dir
> IIRC. Not sure of great ways to work around this without moving the
> './emacs/.git' dir outside of ./emacs during your build, as .git dirs
> contain all kinds of non-reproducible state on disk

Correct.  So keeping the .git directory indeed makes the thing
=E2=80=9Cunreproducible=E2=80=9D in the sense that nobody else will get the=
 same .git
directory.  But it may be acceptable if all you want is to make a
one-off build.

Thanks,
Ludo=E2=80=99.