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channels: Add 'checkout->channel-instance'.

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* guix/channels.scm (checkout->channel-instance): New procedure.
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Ludovic Courtès 2018-11-26 17:16:18 +01:00
parent 94c0e61fe7
commit fe5db4eb03
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1 changed files with 12 additions and 0 deletions
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12
guix/channels.scm
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@ -47,6 +47,7 @@
channel-instance-checkout
latest-channel-instances
checkout->channel-instance
latest-channel-derivation
channel-instances->manifest
channel-instances->derivation))
@ -114,6 +115,17 @@ CHANNELS."
(channel-instance channel commit checkout)))
channels))
(define* (checkout->channel-instance checkout
#:key commit
(url checkout) (name 'guix))
"Return a channel instance for CHECKOUT, which is assumed to be a checkout
of COMMIT at URL. Use NAME as the channel name."
(let* ((commit (or commit (make-string 40 #\0)))
(channel (channel (name name)
(commit commit)
(url url))))
(channel-instance channel commit checkout)))
(define %self-build-file
;; The file containing code to build Guix. This serves the same purpose as
;; a makefile, and, similarly, is intended to always keep this name.