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swh: <revisions> accept null 'date' fields.

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* guix/swh.scm (maybe-null): New procedure.
(<revision>)[date]: Use it.
This commit is contained in:
Ludovic Courtès 2021-09-06 14:03:28 +02:00
parent b452c3b37a
commit 63ed618e33
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1 changed files with 10 additions and 1 deletions
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guix/swh.scm
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@ -186,6 +186,12 @@ (define (ref n)
(ref 10))))))
str)) ;oops!
(define (maybe-null proc)
(match-lambda
((? null?) #f)
('null #f)
(obj (proc obj))))
(define string*
;; Converts "string or #nil" coming from JSON to "string or #f".
(match-lambda
@ -319,10 +325,13 @@ (define-json-mapping <release> make-release release?
(target-url release-target-url "target_url"))
;; <https://archive.softwareheritage.org/api/1/revision/359fdda40f754bbf1b5dc261e7427b75463b59be/>
;; Note: Some revisions, such as those for "nixguix" origins (e.g.,
;; <https://archive.softwareheritage.org/api/1/revision/b8dbc65475bbedde8e015d4730ade8864c38fad3/>),
;; have their 'date' field set to null.
(define-json-mapping <revision> make-revision revision?
json->revision
(id revision-id)
(date revision-date "date" string->date*)
(date revision-date "date" (maybe-null string->date*))
(directory revision-directory)
(directory-url revision-directory-url "directory_url"))