From: "Ludovic Courtès" <ludo@gnu.org>
To: 35176@debbugs.gnu.org
Subject: [bug#35176] [PATCH 3/5] profiles: Add 'generation-profile'.
Date: Sat, 6 Apr 2019 23:31:21 +0200 [thread overview]
Message-ID: <20190406213123.27164-3-ludo@gnu.org> (raw)
In-Reply-To: <20190406213123.27164-1-ludo@gnu.org>
* guix/profiles.scm (%profile-generation-rx): New variable.
(generation-profile): New procedure.
---
guix/profiles.scm | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/guix/profiles.scm b/guix/profiles.scm
index 6564526aee..dfc9ba1ca0 100644
--- a/guix/profiles.scm
+++ b/guix/profiles.scm
@@ -118,6 +118,7 @@
profile-search-paths
generation-number
+ generation-profile
generation-numbers
profile-generations
relative-generation-spec->number
@@ -1552,6 +1553,20 @@ already effective."
(compose string->number (cut match:substring <> 1)))
0))
+(define %profile-generation-rx
+ ;; Regexp that matches profile generation.
+ (make-regexp "(.*)-([0-9]+)-link$"))
+
+(define (generation-profile file)
+ "If FILE is a profile generation GC root such as \"guix-profile-42-link\",
+return its corresponding profile---e.g., \"guix-profile\". Otherwise return
+#f."
+ (match (regexp-exec %profile-generation-rx file)
+ (#f #f)
+ (m (let ((profile (match:substring m 1)))
+ (and (file-exists? (string-append profile "/manifest"))
+ profile)))))
+
(define (generation-numbers profile)
"Return the sorted list of generation numbers of PROFILE, or '(0) if no
former profiles were found."
--
2.21.0
next prev parent reply other threads:[~2019-04-06 21:32 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-06 21:26 [bug#35176] [PATCH 0/5] 'guix gc --delete-generations' and '--list-roots' Ludovic Courtès
2019-04-06 21:31 ` [bug#35176] [PATCH 1/5] Add (guix store roots) Ludovic Courtès
2019-04-06 21:31 ` [bug#35176] [PATCH 2/5] guix gc: Add '--list-roots' Ludovic Courtès
2019-04-06 21:31 ` Ludovic Courtès [this message]
2019-04-06 21:31 ` [bug#35176] [PATCH 4/5] guix gc: Add '--delete-generations' Ludovic Courtès
2019-04-06 21:31 ` [bug#35176] [PATCH 5/5] scripts: GC hint suggests 'guix gc -d 1m' Ludovic Courtès
2019-04-09 19:01 ` [bug#35176] [PATCH 0/5] 'guix gc --delete-generations' and '--list-roots' Björn Höfling
2019-04-09 20:02 ` Ludovic Courtès
2019-04-09 20:58 ` Björn Höfling
2019-04-10 15:19 ` bug#35176: " Ludovic Courtès
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