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| author | Ludovic Courtès <ludo@gnu.org> | 2020-05-20 15:55:37 +0200 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2020-05-25 00:00:28 +0200 |
| commit | 9b049de84ed101e2c0a5d071e76f424b3bc46bd9 (patch) | |
| tree | b71844f74fc05c615a9d002f0048662e4e50ad28 /guix/channels.scm | |
| parent | c098c11be8eb9e0c12be42640721e3cb21c37628 (diff) | |
channels: 'latest-channel-instances' doesn't leak internal state.
* guix/channels.scm (latest-channel-instances): Remove
'previous-channels' argument. Introduce 'loop' and use it.
Diffstat (limited to 'guix/channels.scm')
| -rw-r--r-- | guix/channels.scm | 69 |
1 files changed, 34 insertions, 35 deletions
diff --git a/guix/channels.scm b/guix/channels.scm index f0174de767..e0a7a84f55 100644 --- a/guix/channels.scm +++ b/guix/channels.scm @@ -231,10 +231,9 @@ result is unspecified." #:select? (negate dot-git?)))) (channel-instance channel commit checkout)))) -(define* (latest-channel-instances store channels #:optional (previous-channels '())) +(define* (latest-channel-instances store 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 -of previously processed channels." +CHANNELS and the channels on which they depend." ;; Only process channels that are unique, or that are more specific than a ;; previous channel specification. (define (ignore? channel others) @@ -245,38 +244,38 @@ of previously processed channels." (not (or (channel-commit a) (channel-commit b)))))))) - ;; Accumulate a list of instances. A list of processed channels is also - ;; accumulated to decide on duplicate channel specifications. - (define-values (resulting-channels instances) - (fold2 (lambda (channel previous-channels instances) - (if (ignore? channel previous-channels) - (values previous-channels instances) - (begin - (format (current-error-port) - (G_ "Updating channel '~a' from Git repository at '~a'...~%") - (channel-name channel) - (channel-url channel)) - (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)) - - (let ((instance-name (compose channel-name channel-instance-channel))) - ;; Remove all earlier channel specifications if they are followed by a - ;; more specific one. - (values (delete-duplicates instances - (lambda (a b) - (eq? (instance-name a) (instance-name b)))) - resulting-channels))) + (let loop ((channels channels) + (previous-channels '())) + ;; Accumulate a list of instances. A list of processed channels is also + ;; accumulated to decide on duplicate channel specifications. + (define-values (resulting-channels instances) + (fold2 (lambda (channel previous-channels instances) + (if (ignore? channel previous-channels) + (values previous-channels instances) + (begin + (format (current-error-port) + (G_ "Updating channel '~a' from Git repository at '~a'...~%") + (channel-name channel) + (channel-url channel)) + (let ((instance (latest-channel-instance store channel))) + (let-values (((new-instances new-channels) + (loop (channel-instance-dependencies instance) + previous-channels))) + (values (append (cons channel new-channels) + previous-channels) + (append (cons instance new-instances) + instances))))))) + previous-channels + '() ;instances + channels)) + + (let ((instance-name (compose channel-name channel-instance-channel))) + ;; Remove all earlier channel specifications if they are followed by a + ;; more specific one. + (values (delete-duplicates instances + (lambda (a b) + (eq? (instance-name a) (instance-name b)))) + resulting-channels)))) (define* (checkout->channel-instance checkout #:key commit |