189 lines
7.3 KiB
Scheme
189 lines
7.3 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
|
;;; Copyright © 2015 Ricardo Wurmus <rekado@elephly.net>
|
|
;;;
|
|
;;; This file is part of GNU Guix.
|
|
;;;
|
|
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
|
;;; under the terms of the GNU General Public License as published by
|
|
;;; the Free Software Foundation; either version 3 of the License, or (at
|
|
;;; your option) any later version.
|
|
;;;
|
|
;;; GNU Guix is distributed in the hope that it will be useful, but
|
|
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
;;; GNU General Public License for more details.
|
|
;;;
|
|
;;; You should have received a copy of the GNU General Public License
|
|
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
(define-module (guix import cran)
|
|
#:use-module (ice-9 match)
|
|
#:use-module (ice-9 regex)
|
|
#:use-module (srfi srfi-1)
|
|
#:use-module (sxml simple)
|
|
#:use-module (sxml match)
|
|
#:use-module (sxml xpath)
|
|
#:use-module (guix http-client)
|
|
#:use-module (guix hash)
|
|
#:use-module (guix store)
|
|
#:use-module (guix base32)
|
|
#:use-module ((guix download) #:select (download-to-store))
|
|
#:use-module (guix import utils)
|
|
#:export (cran->guix-package))
|
|
|
|
;;; Commentary:
|
|
;;;
|
|
;;; Generate a package declaration template for the latest version of an R
|
|
;;; package on CRAN, using the HTML description downloaded from
|
|
;;; cran.r-project.org.
|
|
;;;
|
|
;;; Code:
|
|
|
|
(define string->license
|
|
(match-lambda
|
|
("AGPL-3" 'agpl3+)
|
|
("Artistic-2.0" 'artistic2.0)
|
|
("Apache License 2.0" 'asl2.0)
|
|
("BSD_2_clause" 'bsd-2)
|
|
("BSD_3_clause" 'bsd-3)
|
|
("GPL-2" 'gpl2+)
|
|
("GPL-3" 'gpl3+)
|
|
("LGPL-2" 'lgpl2.0+)
|
|
("LGPL-2.1" 'lgpl2.1+)
|
|
("LGPL-3" 'lgpl3+)
|
|
("MIT" 'x11)
|
|
((x) (string->license x))
|
|
((lst ...) `(list ,@(map string->license lst)))
|
|
(_ #f)))
|
|
|
|
(define (format-inputs names)
|
|
"Generate a sorted list of package inputs from a list of package NAMES."
|
|
(map (lambda (name)
|
|
(list name (list 'unquote (string->symbol name))))
|
|
(sort names string-ci<?)))
|
|
|
|
(define* (maybe-inputs package-inputs #:optional (type 'inputs))
|
|
"Given a list of PACKAGE-INPUTS, tries to generate the TYPE field of a
|
|
package definition."
|
|
(match package-inputs
|
|
(()
|
|
'())
|
|
((package-inputs ...)
|
|
`((,type (,'quasiquote ,(format-inputs package-inputs)))))))
|
|
|
|
(define (table-datum tree label)
|
|
"Extract the datum node following a LABEL in the sxml table TREE. Only the
|
|
first cell of a table row is considered a label cell."
|
|
((node-pos 1)
|
|
((sxpath `(xhtml:tr
|
|
(xhtml:td 1) ; only first cell can contain label
|
|
(equal? ,label)
|
|
,(node-parent tree) ; go up to label cell
|
|
,(node-parent tree) ; go up to matching row
|
|
(xhtml:td 2))) ; select second cell
|
|
tree)))
|
|
|
|
(define %cran-url "http://cran.r-project.org/web/packages/")
|
|
|
|
(define (cran-fetch name)
|
|
"Return an sxml representation of the CRAN page for the R package NAME,
|
|
or #f on failure. NAME is case-sensitive."
|
|
;; This API always returns the latest release of the module.
|
|
(let ((cran-url (string-append %cran-url name)))
|
|
(false-if-exception
|
|
(xml->sxml (http-fetch cran-url)
|
|
#:trim-whitespace? #t
|
|
#:namespaces '((xhtml . "http://www.w3.org/1999/xhtml"))
|
|
#:default-entity-handler
|
|
(lambda (port name)
|
|
(case name
|
|
((nbsp) " ")
|
|
((ge) ">=")
|
|
((gt) ">")
|
|
((lt) "<")
|
|
(else
|
|
(format (current-warning-port)
|
|
"~a:~a:~a: undefined entitity: ~a\n"
|
|
cran-url (port-line port) (port-column port)
|
|
name)
|
|
(symbol->string name))))))))
|
|
|
|
(define (cran-sxml->sexp sxml)
|
|
"Return the `package' s-expression for a CRAN package from the SXML
|
|
representation of the package page."
|
|
(define (nodes->text nodeset)
|
|
(string-join ((sxpath '(// *text*)) nodeset) " "))
|
|
|
|
(define (guix-name name)
|
|
(if (string-prefix? "r-" name)
|
|
(string-downcase name)
|
|
(string-append "r-" (string-downcase name))))
|
|
|
|
(sxml-match-let*
|
|
(((*TOP* (xhtml:html
|
|
,head
|
|
(xhtml:body
|
|
(xhtml:h2 ,name-and-synopsis)
|
|
(xhtml:p ,description)
|
|
,summary
|
|
(xhtml:h4 "Downloads:") ,downloads
|
|
. ,rest)))
|
|
sxml))
|
|
(let* ((name (match:prefix (string-match ": " name-and-synopsis)))
|
|
(synopsis (match:suffix (string-match ": " name-and-synopsis)))
|
|
(version (nodes->text (table-datum summary "Version:")))
|
|
(license ((compose string->license nodes->text)
|
|
(table-datum summary "License:")))
|
|
(home-page (nodes->text ((sxpath '((xhtml:a 1)))
|
|
(table-datum summary "URL:"))))
|
|
(source-url (string-append "mirror://cran/"
|
|
;; Remove double dots, because we want an
|
|
;; absolute path.
|
|
(regexp-substitute/global
|
|
#f "\\.\\./"
|
|
(string-join
|
|
((sxpath '((xhtml:a 1) @ href *text*))
|
|
(table-datum downloads
|
|
" Package source: ")))
|
|
'pre 'post)))
|
|
(tarball (with-store store (download-to-store store source-url)))
|
|
(sysdepends (map match:substring
|
|
(list-matches
|
|
"[^ ]+"
|
|
;; Strip off comma and parenthetical
|
|
;; expressions.
|
|
(regexp-substitute/global
|
|
#f "(,|\\([^\\)]+\\))"
|
|
(nodes->text (table-datum summary
|
|
"SystemRequirements:"))
|
|
'pre 'post))))
|
|
(imports (map guix-name
|
|
((sxpath '(// xhtml:a *text*))
|
|
(table-datum summary "Imports:")))))
|
|
`(package
|
|
(name ,(guix-name name))
|
|
(version ,version)
|
|
(source (origin
|
|
(method url-fetch)
|
|
(uri (cran-uri ,name version))
|
|
(sha256
|
|
(base32
|
|
,(bytevector->nix-base32-string (file-sha256 tarball))))))
|
|
(build-system r-build-system)
|
|
,@(maybe-inputs sysdepends)
|
|
,@(maybe-inputs imports 'propagated-inputs)
|
|
(home-page ,(if (string-null? home-page)
|
|
(string-append %cran-url name)
|
|
home-page))
|
|
(synopsis ,synopsis)
|
|
;; Use double spacing
|
|
(description ,(regexp-substitute/global #f "\\. \\b" description
|
|
'pre ". " 'post))
|
|
(license ,license)))))
|
|
|
|
(define (cran->guix-package package-name)
|
|
"Fetch the metadata for PACKAGE-NAME from cran.r-project.org, and return the
|
|
`package' s-expression corresponding to that package, or #f on failure."
|
|
(let ((module-meta (cran-fetch package-name)))
|
|
(and=> module-meta cran-sxml->sexp)))
|