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-rw-r--r--guix/import/cran.scm91
1 files changed, 59 insertions, 32 deletions
diff --git a/guix/import/cran.scm b/guix/import/cran.scm
index 420cd3b63a..1389576cad 100644
--- a/guix/import/cran.scm
+++ b/guix/import/cran.scm
@@ -229,26 +229,61 @@ bioconductor package NAME, or #F if the package is unknown."
(let ((store-directory
(add-to-store store (basename url) #t "sha256" dir)))
(values store-directory changeset)))))))
- (else (download-to-store store url)))))))
-
-(define (fetch-description repository name)
+ (else
+ (match url
+ ((? string?)
+ (download-to-store store url))
+ ((urls ...)
+ ;; Try all the URLs. A use case where this is useful is when one
+ ;; of the URLs is the /Archive CRAN URL.
+ (any (cut download-to-store store <>) urls)))))))))
+
+(define (fetch-description-from-tarball url)
+ "Fetch the tarball at URL, extra its 'DESCRIPTION' file, parse it, and
+return the resulting alist."
+ (match (download url)
+ (#f #f)
+ (tarball
+ (call-with-temporary-directory
+ (lambda (dir)
+ (parameterize ((current-error-port (%make-void-port "rw+"))
+ (current-output-port (%make-void-port "rw+")))
+ (and (zero? (system* "tar" "--wildcards" "-x"
+ "--strip-components=1"
+ "-C" dir
+ "-f" tarball "*/DESCRIPTION"))
+ (description->alist
+ (call-with-input-file (string-append dir "/DESCRIPTION")
+ read-string)))))))))
+
+(define* (fetch-description repository name #:optional version)
"Return an alist of the contents of the DESCRIPTION file for the R package
-NAME in the given REPOSITORY, or #f in case of failure. NAME is
+NAME at VERSION in the given REPOSITORY, or #f in case of failure. NAME is
case-sensitive."
(case repository
((cran)
- (let ((url (string-append %cran-url name "/DESCRIPTION")))
- (guard (c ((http-get-error? c)
- (warning (G_ "failed to retrieve package information \
+ (guard (c ((http-get-error? c)
+ (warning (G_ "failed to retrieve package information \
from ~a: ~a (~a)~%")
- (uri->string (http-get-error-uri c))
- (http-get-error-code c)
- (http-get-error-reason c))
- #f))
- (let* ((port (http-fetch url))
- (result (description->alist (read-string port))))
- (close-port port)
- result))))
+ (uri->string (http-get-error-uri c))
+ (http-get-error-code c)
+ (http-get-error-reason c))
+ #f))
+ ;; When VERSION is true, we have to download the tarball to get at its
+ ;; 'DESCRIPTION' file; only the latest one is directly accessible over
+ ;; HTTP.
+ (if version
+ (let ((urls (list (string-append "mirror://cran/src/contrib/"
+ name "_" version ".tar.gz")
+ (string-append "mirror://cran/src/contrib/Archive/"
+ name "/"
+ name "_" version ".tar.gz"))))
+ (fetch-description-from-tarball urls))
+ (let* ((url (string-append %cran-url name "/DESCRIPTION"))
+ (port (http-fetch url))
+ (result (description->alist (read-string port))))
+ (close-port port)
+ result))))
((bioconductor)
;; Currently, the bioconductor project does not offer a way to access a
;; package's DESCRIPTION file over HTTP, so we determine the version,
@@ -257,22 +292,13 @@ from ~a: ~a (~a)~%")
(and (latest-bioconductor-package-version name) #t)
(and (latest-bioconductor-package-version name 'annotation) 'annotation)
(and (latest-bioconductor-package-version name 'experiment) 'experiment)))
+ ;; TODO: Honor VERSION.
(version (latest-bioconductor-package-version name type))
(url (car (bioconductor-uri name version type)))
- (tarball (download url)))
- (call-with-temporary-directory
- (lambda (dir)
- (parameterize ((current-error-port (%make-void-port "rw+"))
- (current-output-port (%make-void-port "rw+")))
- (and (zero? (system* "tar" "--wildcards" "-x"
- "--strip-components=1"
- "-C" dir
- "-f" tarball "*/DESCRIPTION"))
- (and=> (description->alist (with-input-from-file
- (string-append dir "/DESCRIPTION") read-string))
- (lambda (meta)
- (if (boolean? type) meta
- (cons `(bioconductor-type . ,type) meta))))))))))
+ (meta (fetch-description-from-tarball url)))
+ (if (boolean? type)
+ meta
+ (cons `(bioconductor-type . ,type) meta))))
((git)
(and (string-prefix? "http" name)
;; Download the git repository at "NAME"
@@ -485,7 +511,7 @@ from the alist META, which was derived from the R package's DESCRIPTION file."
((bioconductor)
(list (assoc-ref meta 'bioconductor-type)))
(else '())))
- ((url rest ...) url)
+ ((urls ...) urls)
((? string? url) url)
(_ #f)))))
(git? (assoc-ref meta 'git))
@@ -592,7 +618,7 @@ from the alist META, which was derived from the R package's DESCRIPTION file."
(lambda* (package-name #:key (repo 'cran) version)
"Fetch the metadata for PACKAGE-NAME from REPO and return the `package'
s-expression corresponding to that package, or #f on failure."
- (let ((description (fetch-description repo package-name)))
+ (let ((description (fetch-description repo package-name version)))
(if description
(description->package repo description)
(case repo
@@ -610,8 +636,9 @@ s-expression corresponding to that package, or #f on failure."
(&message
(message "couldn't find meta-data for R package")))))))))))
-(define* (cran-recursive-import package-name #:key (repo 'cran))
+(define* (cran-recursive-import package-name #:key (repo 'cran) version)
(recursive-import package-name
+ #:version version
#:repo repo
#:repo->guix-package cran->guix-package
#:guix-name cran-guix-name))