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Diffstat (limited to 'doc/guix.texi')
| -rw-r--r-- | doc/guix.texi | 47 |
1 files changed, 45 insertions, 2 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index da62194a16..0ed59072c9 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -3673,12 +3673,21 @@ Generation 3 Jun 13 2018 23:31:07 (current) @xref{Invoking guix describe, @command{guix describe}}, for other ways to describe the current status of Guix. -This @code{~/.config/guix/current} profile works like any other profile -created by @command{guix package} (@pxref{Invoking guix package}). That +This @code{~/.config/guix/current} profile works exactly like the profiles +created by @command{guix package} (@pxref{Invoking guix package}). That is, you can list generations, roll back to the previous generation---i.e., the previous Guix---and so on: @example +$ guix pull --roll-back +switched from generation 3 to 2 +$ guix pull --delete-generations=1 +deleting /var/guix/profiles/per-user/charlie/current-guix-1-link +@end example + +You can also use @command{guix package} (@pxref{Invoking guix package}) +to manage the profile by naming it explicitly: +@example $ guix package -p ~/.config/guix/current --roll-back switched from generation 3 to 2 $ guix package -p ~/.config/guix/current --delete-generations=1 @@ -3724,6 +3733,40 @@ is provided, the subset of generations that match @var{pattern}. The syntax of @var{pattern} is the same as with @code{guix package --list-generations} (@pxref{Invoking guix package}). +@item --roll-back +@cindex rolling back +@cindex undoing transactions +@cindex transactions, undoing +Roll back to the previous @dfn{generation} of @file{~/.config/guix/current}---i.e., +undo the last transaction. + +@item --switch-generation=@var{pattern} +@itemx -S @var{pattern} +@cindex generations +Switch to a particular generation defined by @var{pattern}. + +@var{pattern} may be either a generation number or a number prefixed +with ``+'' or ``-''. The latter means: move forward/backward by a +specified number of generations. For example, if you want to return to +the latest generation after @code{--roll-back}, use +@code{--switch-generation=+1}. + +@item --delete-generations[=@var{pattern}] +@itemx -d [@var{pattern}] +When @var{pattern} is omitted, delete all generations except the current +one. + +This command accepts the same patterns as @option{--list-generations}. +When @var{pattern} is specified, delete the matching generations. When +@var{pattern} specifies a duration, generations @emph{older} than the +specified duration match. For instance, @code{--delete-generations=1m} +deletes generations that are more than one month old. + +If the current generation matches, it is @emph{not} deleted. + +Note that deleting generations prevents rolling back to them. +Consequently, this command must be used with care. + @xref{Invoking guix describe}, for a way to display information about the current generation only. |