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05/05: guix gc: Add '--derivers'.
From: |
Ludovic Courtès |
Subject: |
05/05: guix gc: Add '--derivers'. |
Date: |
Tue, 27 Mar 2018 08:51:55 -0400 (EDT) |
civodul pushed a commit to branch master
in repository guix.
commit 8980eea5ab6f89e7649d9abf0be2a9d49156f7d2
Author: Ludovic Courtès <address@hidden>
Date: Tue Mar 27 14:16:19 2018 +0200
guix gc: Add '--derivers'.
* guix/scripts/gc.scm (show-help, %options): Add '--derivers'.
(guix-gc): Handle 'list-derivers'.
* tests/guix-gc.sh: Add test.
* doc/guix.texi (Invoking guix gc): Document it.
---
doc/guix.texi | 18 ++++++++++++++++++
guix/scripts/gc.scm | 10 +++++++++-
tests/guix-gc.sh | 5 ++++-
3 files changed, 31 insertions(+), 2 deletions(-)
diff --git a/doc/guix.texi b/doc/guix.texi
index 2204285..c37a87d 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -2642,6 +2642,24 @@ of these, recursively. In other words, the returned
list is the
of an element. @xref{Invoking guix graph}, for a tool to visualize
the graph of references.
address@hidden --derivers
address@hidden derivation
+Return the derivation(s) leading to the given store items
+(@pxref{Derivations}).
+
+For example, this command:
+
address@hidden
+guix gc --derivers `guix package -I ^emacs$ | cut -f4`
address@hidden example
+
address@hidden
+returns the @file{.drv} file(s) leading to the @code{emacs} package
+installed in your profile.
+
+Note that there may be zero matching @file{.drv} files, for instance
+because these files have been garbage-collected. There can also be more
+than one matching @file{.drv} due to fixed-output derivations.
@end table
Lastly, the following options allow you to check the integrity of the
diff --git a/guix/scripts/gc.scm b/guix/scripts/gc.scm
index a31d223..e4ed722 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 Ludovic Courtès <address@hidden>
+;;; Copyright © 2012, 2013, 2015, 2016, 2017, 2018 Ludovic Courtès
<address@hidden>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -61,6 +61,8 @@ Invoke the garbage collector.\n"))
-R, --requisites list the requisites of PATHS"))
(display (G_ "
--referrers list the referrers of PATHS"))
+ (display (G_ "
+ --derivers list the derivers of PATHS"))
(newline)
(display (G_ "
--verify[=OPTS] verify the integrity of the store; OPTS is a
@@ -153,6 +155,10 @@ Invoke the garbage collector.\n"))
(lambda (opt name arg result)
(alist-cons 'action 'list-referrers
(alist-delete 'action result))))
+ (option '("derivers") #f #f
+ (lambda (opt name arg result)
+ (alist-cons 'action 'list-derivers
+ (alist-delete 'action result))))
(option '("list-failures") #f #f
(lambda (opt name arg result)
(alist-cons 'action 'list-failures
@@ -241,6 +247,8 @@ Invoke the garbage collector.\n"))
(requisites store (list item)))))
((list-referrers)
(list-relatives referrers))
+ ((list-derivers)
+ (list-relatives valid-derivers))
((optimize)
(assert-no-extra-arguments)
(optimize-store store))
diff --git a/tests/guix-gc.sh b/tests/guix-gc.sh
index efbc7e7..ef2d954 100644
--- a/tests/guix-gc.sh
+++ b/tests/guix-gc.sh
@@ -1,5 +1,5 @@
# GNU Guix --- Functional package management for GNU
-# Copyright © 2013, 2015, 2017 Ludovic Courtès <address@hidden>
+# Copyright © 2013, 2015, 2017, 2018 Ludovic Courtès <address@hidden>
#
# This file is part of GNU Guix.
#
@@ -54,6 +54,9 @@ guix gc --references "$out/bin/guile"
if guix gc --references /dev/null;
then false; else true; fi
+# Check derivers.
+guix gc --derivers "$out" | grep "$drv"
+
# Add then reclaim a .drv file.
drv="`guix build idutils -d`"
test -f "$drv"