doc: Clarify that 'guix pull' can't be easily rolled back.

* doc/guix.texi (Invoking guix pull): Clarify that 'guix pull' can't be
  easily rolled back.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
master
Chris Marusich 2017-01-29 20:40:34 -08:00 committed by Ludovic Courtès
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@ -2337,7 +2337,9 @@ instance, when user @code{root} runs @command{guix pull}, this has no
effect on the version of Guix that user @code{alice} sees, and vice
versa@footnote{Under the hood, @command{guix pull} updates the
@file{~/.config/guix/latest} symbolic link to point to the latest Guix,
and the @command{guix} command loads code from there.}.
and the @command{guix} command loads code from there. Currently, the
only way to roll back an invocation of @command{guix pull} is to
manually update this symlink to point to the previous Guix.}.
The @command{guix pull} command is usually invoked with no arguments,
but it supports the following options: