3049097ac2
This is a small improvement awaiting a definitive fix for <https://issues.guix.gnu.org/45656>. * guix/import/texlive.scm (sxml->package): Produce a warning when the SVN checkout failed. Rather than crashing on the unexpected #f value, return a partial package definition with the source field set to #f.
198 lines
7.3 KiB
Scheme
198 lines
7.3 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2017 Ricardo Wurmus <rekado@elephly.net>
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;;; Copyright © 2021 Maxim Cournoyer <maxim.cournoyer@gmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix import texlive)
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#:use-module (ice-9 match)
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#:use-module (sxml simple)
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#:use-module (sxml xpath)
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#:use-module (srfi srfi-11)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-34)
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#:use-module (web uri)
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#:use-module (guix diagnostics)
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#:use-module (guix i18n)
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#:use-module (guix http-client)
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#:use-module (gcrypt hash)
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#:use-module (guix memoization)
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#:use-module (guix store)
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#:use-module (guix base32)
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#:use-module (guix serialization)
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#:use-module (guix svn-download)
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#:use-module (guix import utils)
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#:use-module (guix utils)
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#:use-module (guix upstream)
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#:use-module (guix packages)
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#:use-module (gnu packages)
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#:use-module (guix build-system texlive)
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#:export (texlive->guix-package
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fetch-sxml
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sxml->package))
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;;; Commentary:
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;;;
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;;; Generate a package declaration template for the latest version of a
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;;; package on CTAN, using the XML output produced by the XML API to the CTAN
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;;; database at http://www.ctan.org/xml/1.2/
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;;;
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;;; Instead of taking the packages from CTAN, however, we fetch the sources
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;;; from the SVN repository of the Texlive project. We do this because CTAN
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;;; only keeps a single version of each package whereas we can access any
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;;; version via SVN. Unfortunately, this means that the importer is really
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;;; just a Texlive importer, not a generic CTAN importer.
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;;;
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;;; Code:
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(define string->license
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(match-lambda
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("artistic2" 'gpl3+)
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("gpl" 'gpl3+)
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("gpl1" 'gpl1)
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("gpl1+" 'gpl1+)
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("gpl2" 'gpl2)
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("gpl2+" 'gpl2+)
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("gpl3" 'gpl3)
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("gpl3+" 'gpl3+)
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("lgpl2.1" 'lgpl2.1)
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("lgpl3" 'lgpl3)
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("knuth" 'knuth)
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("pd" 'public-domain)
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("bsd2" 'bsd-2)
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("bsd3" 'bsd-3)
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("bsd4" 'bsd-4)
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("opl" 'opl1.0+)
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("ofl" 'silofl1.1)
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("lppl" 'lppl)
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("lppl1" 'lppl1.0+) ; usually means "or later"
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("lppl1.2" 'lppl1.2+) ; usually means "or later"
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("lppl1.3" 'lppl1.3+) ; usually means "or later"
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("lppl1.3a" 'lppl1.3a)
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("lppl1.3b" 'lppl1.3b)
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("lppl1.3c" 'lppl1.3c)
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("cc-by-2" 'cc-by-2.0)
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("cc-by-3" 'cc-by-3.0)
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("cc-by-sa-2" 'cc-by-sa2.0)
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("cc-by-sa-3" 'cc-by-sa3.0)
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("mit" 'expat)
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("fdl" 'fdl1.3+)
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("gfl" 'gfl1.0)
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;; These are known non-free licenses
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("noinfo" 'unknown)
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("nosell" 'non-free)
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("shareware" 'non-free)
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("nosource" 'non-free)
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("nocommercial" 'non-free)
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("cc-by-nc-nd-1" 'non-free)
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("cc-by-nc-nd-2" 'non-free)
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("cc-by-nc-nd-2.5" 'non-free)
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("cc-by-nc-nd-3" 'non-free)
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("cc-by-nc-nd-4" 'non-free)
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((x) (string->license x))
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((lst ...) `(list ,@(map string->license lst)))
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(_ #f)))
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(define (fetch-sxml name)
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"Return an sxml representation of the package information contained in the
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XML description of the CTAN package or #f in case of failure."
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;; This API always returns the latest release of the module.
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(let ((url (string-append "http://www.ctan.org/xml/1.2/pkg/" name)))
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(guard (c ((http-get-error? c)
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(format (current-error-port)
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"error: failed to retrieve package information \
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from ~s: ~a (~s)~%"
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(uri->string (http-get-error-uri c))
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(http-get-error-code c)
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(http-get-error-reason c))
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#f))
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(xml->sxml (http-fetch url)
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#:trim-whitespace? #t))))
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(define (guix-name component name)
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"Return a Guix package name for a given Texlive package NAME."
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(string-append "texlive-" component "-"
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(string-map (match-lambda
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(#\_ #\-)
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(#\. #\-)
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(chr (char-downcase chr)))
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name)))
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(define* (sxml->package sxml #:optional (component "latex"))
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"Return the `package' s-expression for a Texlive package from the SXML
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expression describing it."
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(define (sxml-value path)
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(match ((sxpath path) sxml)
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(() #f)
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((val) val)))
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(with-store store
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(let* ((id (sxml-value '(entry @ id *text*)))
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(synopsis (sxml-value '(entry caption *text*)))
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(version (or (sxml-value '(entry version @ number *text*))
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(sxml-value '(entry version @ date *text*))))
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(license (match ((sxpath '(entry license @ type *text*)) sxml)
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((license) (string->license license))
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((lst ...) (map string->license lst))))
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(home-page (string-append "http://www.ctan.org/pkg/" id))
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(ref (texlive-ref component id))
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(checkout (download-svn-to-store store ref)))
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(unless checkout
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(warning (G_ "Could not determine source location. \
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Please manually specify the source field.~%")))
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`(package
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(name ,(guix-name component id))
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(version ,version)
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(source ,(if checkout
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`(origin
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(method svn-fetch)
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(uri (texlive-ref ,component ,id))
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(sha256
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(base32
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,(bytevector->nix-base32-string
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(let-values (((port get-hash) (open-sha256-port)))
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(write-file checkout port)
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(force-output port)
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(get-hash))))))
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#f))
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(build-system texlive-build-system)
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(arguments ,`(,'quote (#:tex-directory ,(string-join (list component id) "/"))))
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(home-page ,home-page)
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(synopsis ,synopsis)
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(description ,(string-trim-both
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(string-join
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(map string-trim-both
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(string-split
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(beautify-description
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(sxml->string (or (sxml-value '(entry description))
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'())))
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#\newline)))))
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(license ,(match license
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((lst ...) `(list ,@lst))
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(license license)))))))
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(define texlive->guix-package
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(memoize
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(lambda* (package-name #:optional (component "latex"))
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"Fetch the metadata for PACKAGE-NAME from REPO and return the `package'
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s-expression corresponding to that package, or #f on failure."
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(and=> (fetch-sxml package-name)
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(cut sxml->package <> component)))))
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;;; ctan.scm ends here
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