GNU bug report logs - #25100
'guix system reconfigure' fails when new generation already exists

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From: Chris Marusich <cmmarusich <at> gmail.com>
To: 25100 <at> debbugs.gnu.org
Subject: bug#25100: 'guix system reconfigure' fails when new generation already exists
Date: Sat, 03 Dec 2016 02:24:50 -0800

[Message part 1 (text/plain, inline)]

Hi,

I've noticed that, in GuixSD, if one rolls back the system with 'guix
system roll-back' or switches to a previous generation with 'guix system
switch-generation', and then one tries to run 'guix system reconfigure',
the operation fails because the symlink for the new generation already
exists.  I expected the operation to succeed and overwrite the existing
generation, since that mirrors the behavior of 'guix package'.

Specifically, if the current generation is N and generation N+1 exists,
then running 'guix system reconfigure' should overwrite generation N+1
with the new system.  Currently, it fails to create the symlink.  I've
attached a patch which modifies the behavior to be what I expected.

-- 
Chris

[0001-system-If-the-new-system-generation-already-exists-o.patch (text/x-patch, attachment)]

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