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From: Nikita Karetnikov <nikita@karetnikov.org>
To: guix-devel@gnu.org
Subject: package.scm: (profile-derivation (%store) '())
Date: Fri, 20 Sep 2013 21:39:17 +0400	[thread overview]
Message-ID: <87r4cjjsu2.fsf@karetnikov.org> (raw)

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I’d like to know how ‘roll-back’ creates an empty generation because
it’s necessary to do the same for ‘--delete-generations’.

However, I fail to understand how (profile-derivation (%store) ‘())
works (or any other function that uses (%store)).  I assume that some
code should set ‘%store’ to something else.  Like so:

scheme@(guix scripts package)> %store
$1 = #<<parameter> 934e7f8 proc: #<procedure 934e810 at ice-9/boot-9.scm:3154:17 () | (x)>>
scheme@(guix scripts package)> (%store)
$2 = #f
scheme@(guix scripts package)> (%store "FOO")
$3 = #f
scheme@(guix scripts package)> (%store)
$4 = "FOO"

But I don’t see anything similar in ‘package.scm’.

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             reply	other threads:[~2013-09-20 17:34 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-20 17:39 Nikita Karetnikov [this message]
2013-09-20 20:21 ` package.scm: (profile-derivation (%store) '()) Ludovic Courtès
2013-09-20 21:08   ` Nikita Karetnikov
2013-09-20 21:35     ` Ludovic Courtès

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