[bug#56618] [PATCH 2/2] guix gc: '--delete-generations' now deletes old Home generations.

[Ludovic Courtès]

Previously, 'guix gc -d4m' would ignore Home generations.  With this
change, they are treated like profiles and generations that match the
pattern are deleted.

* guix/scripts/gc.scm (guix-gc)[delete-generations]: Add call to
'home-generation-base'.
* doc/guix.texi (Invoking guix gc): Document the change.
---
 doc/guix.texi       | 3 ++-
 guix/scripts/gc.scm | 6 ++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 8fc8f53d0e..f3f3189f64 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -4362,7 +4362,8 @@ nothing and exit immediately.
 @item --delete-generations[=@var{duration}]
 @itemx -d [@var{duration}]
 Before starting the garbage collection process, delete all the generations
-older than @var{duration}, for all the user profiles; when run as root, this
+older than @var{duration}, for all the user profiles and home environment
+generations; when run as root, this
 applies to all the profiles @emph{of all the users}.
 
 For example, this command deletes all the generations of all your profiles
diff --git a/guix/scripts/gc.scm b/guix/scripts/gc.scm
index 043273f491..65cd4bdf8b 100644
--- a/guix/scripts/gc.scm
+++ b/guix/scripts/gc.scm
@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès 
<ludo@gnu.org>
+;;; Copyright © 2012-2013, 2015-2020, 2022 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -26,6 +26,7 @@ (define-module (guix scripts gc)
                                 profile-generations
                                 generation-number)
   #:autoload   (guix scripts package) (delete-generations)
+  #:autoload   (gnu home) (home-generation-base)
   #:use-module (ice-9 match)
   #:use-module (ice-9 regex)
   #:use-module (srfi srfi-1)
@@ -260,7 +261,8 @@ (define (delete-generations store pattern)
                      (filter-map (lambda (root)
                                    (and (or (zero? (getuid))
                                             (user-owned? root))
-                                        (generation-profile root)))
+                                        (or (generation-profile root)
+                                            (home-generation-base root))))
                                  (gc-roots)))))
       (for-each (lambda (profile)
                   (delete-old-generations store profile pattern))
-- 
2.36.1