From: Nikita Karetnikov <nikita@karetnikov.org>
To: "Ludovic Courtès" <ludo@gnu.org>
Cc: bug-guix@gnu.org
Subject: Re: guix-package --roll-back
Date: Sat, 12 Jan 2013 16:03:31 -0500 [thread overview]
Message-ID: <871udqp0zr.fsf@karetnikov.org> (raw)
In-Reply-To: <87obgvale8.fsf@gnu.org> ("Ludovic Courtès"'s message of "(unknown date)")
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> It actually does, but it has no side effect.
I know that printing is a side effect. Why do you recommend to use
'alist-cons'? If it's not possible to display anything, then
'roll-back' won't be able to print the following messages.
(simple-format #t "guix-package: switching from generation ~a to ~a~%"
current-profile-number previous-profile-number)
(leave (_ (string-append
"guix-package: previous profile doesn't exist; "
"not rolling back~%")))
Actually, if the above is correct, then it won't be possible to use
'roll-back' at all. (Because it creates symlinks.)
I think that I misunderstood you. Please elaborate.
> When ‘--profile’ is passed, the result of ‘parse-options’ contains a
> pair whose key is ‘profile’. The (assoc-ref opts 'profile) calls that
> you see retrieve the argument given to ‘--profile’.
It's clear. But where should I call (assoc-ref opts 'profile)? Should
I do it in 'process-query'?
Nikita
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next prev parent reply other threads:[~2013-01-12 21:03 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-21 22:49 guix-package --roll-back Nikita Karetnikov
2012-12-29 23:09 ` Nikita Karetnikov
2012-12-29 23:13 ` Andreas Enge
2012-12-30 15:30 ` Ludovic Courtès
2013-01-01 13:57 ` Nikita Karetnikov
2013-01-01 22:58 ` Ludovic Courtès
2013-01-03 5:42 ` Nikita Karetnikov
2013-01-03 14:41 ` Ludovic Courtès
2013-01-04 18:18 ` Nikita Karetnikov
2013-01-05 19:20 ` Ludovic Courtès
2013-01-09 19:04 ` Nikita Karetnikov
2013-01-10 15:01 ` Nikita Karetnikov
2013-01-10 22:26 ` Ludovic Courtès
2013-01-11 5:48 ` Nikita Karetnikov
2013-01-11 13:39 ` Ludovic Courtès
2013-01-12 21:03 ` Nikita Karetnikov [this message]
2013-01-13 20:40 ` Ludovic Courtès
2013-01-16 21:34 ` Nikita Karetnikov
2013-01-17 21:47 ` Ludovic Courtès
2013-01-21 5:50 ` Nikita Karetnikov
2013-01-22 21:37 ` Ludovic Courtès
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