doc: Link from "guix gc" to '--delete-generations'.

* doc/guix.texi (Invoking guix package): Mention that deleting
  generations prevents roll-back.
  (Invoking guix gc): Link to '--delete-generations'.
This commit is contained in:
Ludovic Courtès 2013-09-27 01:26:26 +02:00
parent d7ddb257c9
commit 1bb9900a2a

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@ -730,6 +730,9 @@ If the current generation matches, it is deleted atomically---i.e., by
switching to the previous available generation. Note that the zeroth
generation is never deleted.
Note that deleting generations prevents roll-back to them.
Consequently, this command must be used with care.
@end table
@node Packages with Multiple Outputs
@ -797,6 +800,12 @@ deleted. The set of garbage collector roots includes default user
profiles, and may be augmented with @command{guix build --root}, for
example (@pxref{Invoking guix build}).
Prior to running @code{guix gc --collect-garbage} to make space, it is
often useful to remove old generations from user profiles; that way, old
package builds referenced by those generations can be reclaimed. This
is achieved by running @code{guix package --delete-generations}
(@pxref{Invoking guix package}).
The @command{guix gc} command has three modes of operation: it can be
used to garbage-collect any dead files (the default), to delete specific
files (the @code{--delete} option), or to print garbage-collector