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authorLudovic Courtès <ludo@gnu.org>2020-05-06 22:18:52 +0200
committerLudovic Courtès <ludo@gnu.org>2020-05-07 10:06:15 +0200
commit4ba425060a9d000f54bbab99d17a2f23b277c623 (patch)
tree5193e1244169e2124ef84571291fede98600b66d /guix/channels.scm
parentc263cfdcde0402cf44be7b14841d567f00e0af11 (diff)
channels: Add 'latest-channel-instance'.
* guix/channels.scm (latest-channel-instance): New procedure. (latest-channel-instances): Use it.
Diffstat (limited to 'guix/channels.scm')
-rw-r--r--guix/channels.scm32
1 files changed, 18 insertions, 14 deletions
diff --git a/guix/channels.scm b/guix/channels.scm
index 041fae2a9c..4ffc366d6a 100644
--- a/guix/channels.scm
+++ b/guix/channels.scm
@@ -199,6 +199,14 @@ description file or its default value."
channel INSTANCE."
(channel-metadata-dependencies (channel-instance-metadata instance)))
+(define (latest-channel-instance store channel)
+ "Return the latest channel instance for CHANNEL."
+ (let-values (((checkout commit)
+ (latest-repository-commit store (channel-url channel)
+ #:ref (channel-reference
+ channel))))
+ (channel-instance channel commit checkout)))
+
(define* (latest-channel-instances store channels #:optional (previous-channels '()))
"Return a list of channel instances corresponding to the latest checkouts of
CHANNELS and the channels on which they depend. PREVIOUS-CHANNELS is a list
@@ -224,20 +232,16 @@ of previously processed channels."
(G_ "Updating channel '~a' from Git repository at '~a'...~%")
(channel-name channel)
(channel-url channel))
- (let-values (((checkout commit)
- (latest-repository-commit store (channel-url channel)
- #:ref (channel-reference
- channel))))
- (let ((instance (channel-instance channel commit checkout)))
- (let-values (((new-instances new-channels)
- (latest-channel-instances
- store
- (channel-instance-dependencies instance)
- previous-channels)))
- (values (append (cons channel new-channels)
- previous-channels)
- (append (cons instance new-instances)
- instances))))))))
+ (let ((instance (latest-channel-instance store channel)))
+ (let-values (((new-instances new-channels)
+ (latest-channel-instances
+ store
+ (channel-instance-dependencies instance)
+ previous-channels)))
+ (values (append (cons channel new-channels)
+ previous-channels)
+ (append (cons instance new-instances)
+ instances)))))))
previous-channels
'() ;instances
channels))