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From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: 07/07: guix: python-build-system: Fix an outdated comment.
Date: Sun, 16 Oct 2016 00:16:27 +0200
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In-Reply-To: <20161013224529.1a55e84a@scratchpost.org> (Danny Milosavljevic's
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To: Danny Milosavljevic <dannym@scratchpost.org>
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Danny Milosavljevic <dannym@scratchpost.org> skribis:

>> Sorry, I didn't realize that altering comments here would have an
>> effect; I would have warned Hartmut if I had.
>
> Out of curiousity, why does it have an effect?

The file is imported in the build environment (chroot) of all the
packages that use =E2=80=98python-build-system=E2=80=99.  It=E2=80=99s an i=
nput of the
derivation of those packages, so when it changes, all these derivations
change.

Hartmut Goebel <h.goebel@crazy-compilers.com> skribis:

>> Sorry, I didn't realize that altering comments here would have an
>> effect; I would have warned Hartmut if I had.
>
> I'm sorry, too. I didn't expect that changing a comment would have any
> impact on building packages. Aren't the the files converted to some
> canonical form prior to deciding whether they changed?

No.  There=E2=80=99s no =E2=80=9Cdecision=E2=80=9D as to whether they chang=
ed; instead, they
just happen to be part of the hash of the output file name.

That said, don=E2=80=99t be sorry gentlefolks: these things happen.  ;-)

Ludo=E2=80=99.