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authorLudovic Courtès <ludo@gnu.org>2019-02-13 15:27:36 +0100
committerLudovic Courtès <ludo@gnu.org>2019-02-13 16:19:54 +0100
commit499b166d1ce3ead61afb985053012ceb451f3beb (patch)
tree0e9c96305a372162def4805acfa10cf38556214a
parent7b9b203a52fd31558d0d5c424da0dfb5f7dceef6 (diff)
downloadguix-499b166d1ce3ead61afb985053012ceb451f3beb.tar
guix-499b166d1ce3ead61afb985053012ceb451f3beb.tar.gz
guix system: Add 'delete-generations'.
* guix/scripts/package.scm (delete-matching-generations): Export. * guix/scripts/system.scm (show-help): Add 'delete-generations'. (process-command): Honor it. (guix-system): Support it. * doc/guix.texi (Invoking guix system): Document it.
-rw-r--r--doc/guix.texi26
-rw-r--r--guix/scripts/package.scm1
-rw-r--r--guix/scripts/system.scm17
3 files changed, 42 insertions, 2 deletions
diff --git a/doc/guix.texi b/doc/guix.texi
index 2ae4f53245..6980672094 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -23038,6 +23038,32 @@ Currently, as with @command{switch-generation}, you must reboot after
running this action to actually start using the preceding system
generation.
+@item delete-generations
+@cindex deleting system generations
+@cindex saving space
+Delete system generations, making them candidates for garbage collection
+(@pxref{Invoking guix gc}, for information on how to run the ``garbage
+collector'').
+
+This works in the same way as @command{guix package --delete-generations}
+(@pxref{Invoking guix package, @code{--delete-generations}}). With no
+arguments, all system generations but the current one are deleted:
+
+@example
+guix system delete-generations
+@end example
+
+You can also select the generations you want to delete. The example below
+deletes all the system generations that are more than two month old:
+
+@example
+guix system delete-generations 2m
+@end example
+
+Running this command automatically reinstalls the bootloader with an updated
+list of menu entries---e.g., the ``old generations'' sub-menu in GRUB no
+longer lists the generations that have been deleted.
+
@item build
Build the derivation of the operating system, which includes all the
configuration files and programs needed to boot and run the system.
diff --git a/guix/scripts/package.scm b/guix/scripts/package.scm
index 1695250c79..0e70315708 100644
--- a/guix/scripts/package.scm
+++ b/guix/scripts/package.scm
@@ -55,6 +55,7 @@
#:autoload (gnu packages bootstrap) (%bootstrap-guile)
#:export (build-and-use-profile
delete-generations
+ delete-matching-generations
display-search-paths
guix-package))
diff --git a/guix/scripts/system.scm b/guix/scripts/system.scm
index 4c8d8acc8f..c0301eac2b 100644
--- a/guix/scripts/system.scm
+++ b/guix/scripts/system.scm
@@ -36,6 +36,8 @@
#:use-module (guix profiles)
#:use-module (guix scripts)
#:use-module (guix scripts build)
+ #:autoload (guix scripts package) (delete-generations
+ delete-matching-generations)
#:use-module (guix graph)
#:use-module (guix scripts graph)
#:use-module (guix build utils)
@@ -963,9 +965,11 @@ Some ACTIONS support additional ARGS.\n"))
(display (G_ "\
roll-back switch to the previous operating system configuration\n"))
(display (G_ "\
+ list-generations list the system generations\n"))
+ (display (G_ "\
switch-generation switch to an existing operating system configuration\n"))
(display (G_ "\
- list-generations list the system generations\n"))
+ delete-generations delete old system generations\n"))
(display (G_ "\
build build the operating system without installing anything\n"))
(display (G_ "\
@@ -1202,6 +1206,14 @@ argument list and OPTS is the option alist."
(apply (resolve-subcommand "search") args))
;; The following commands need to use the store, but they do not need an
;; operating system configuration file.
+ ((delete-generations)
+ (let ((pattern (match args
+ (() "")
+ ((pattern) pattern)
+ (x (leave (G_ "wrong number of arguments~%"))))))
+ (with-store store
+ (delete-matching-generations store %system-profile pattern)
+ (reinstall-bootloader store (generation-number %system-profile)))))
((switch-generation)
(let ((pattern (match args
((pattern) pattern)
@@ -1228,7 +1240,8 @@ argument list and OPTS is the option alist."
(let ((action (string->symbol arg)))
(case action
((build container vm vm-image disk-image reconfigure init
- extension-graph shepherd-graph list-generations roll-back
+ extension-graph shepherd-graph
+ list-generations delete-generations roll-back
switch-generation search docker-image)
(alist-cons 'action action result))
(else (leave (G_ "~a: unknown action~%") action))))))