#26608 - Provide --only-substitutes flag to "guix package --upgrade"

Package	Source(s)		Maintainer(s)
guix		PTS Buildd Popcon

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From: Konrad Hinsen <konrad.hinsen@fastmail.net>
To: Ludovic Courtès <ludo@gnu.org>
Subject: Re: bug#22629: “Stable” branch
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Date: Fri, 31 Aug 2018 12:33:19 +0200
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Cc: 26608@debbugs.gnu.org, 22629@debbugs.gnu.org,
 Alex Sassmannshausen <alex@pompo.co>, 32022@debbugs.gnu.org
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Hi Ludo,

> What do you mean by “limit it to channels”?  ‘%default-channels’ is an
> alias for the official Guix channel (IOW, Guix itself.)

Fine, but I rarely care about all of Guix, or all of any other channel.
I care about the small subset of packages that I actually use.

Better yet, with a per-manifest/profile approach, I could put my most
critical packages in a special profile and get updates for them more
quickly, while still working only with substitutes.

BTW, just out of curiosity: for how many commits in Guix history all
packages could be built successfully? Is that the rule of the exception?

> Yes, we could do that, and even maybe more sophisticated things (e.g.,
> looking at the commit log to determine whether security fixes are
> available, and adjusting the strategy accordingly.)

Nice!

> What I find interesting is that we can provide the tools to support such
> policies, and then users can choose or implement the policy they want
> directly in ~/.config/guix/channels.scm.

I agree, it's nice to give people the tools they need to implement their
own policy.

Konrad.

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#26608 Provide --only-substitutes flag to "guix package --upgrade"