118 lines
4.4 KiB
Scheme
118 lines
4.4 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2017, 2019, 2021 Ludovic Courtès <ludo@gnu.org>
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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 gnome)
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#:use-module (guix upstream)
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#:use-module (guix utils)
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#:use-module (guix packages)
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#:use-module (guix http-client)
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#:use-module (json)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-11)
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#:use-module (srfi srfi-34)
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#:use-module (web uri)
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#:use-module (ice-9 match)
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#:export (%gnome-updater))
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;;; Commentary:
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;;;
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;;; This package provides not an actual importer but simply an updater for
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;;; GNOME packages. It grabs package meta-data from 'cache.json' files
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;;; available on ftp.gnome.org.
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;;;
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;;; Code:
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(define (jsonish->upstream-source name jsonish)
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"Return an <upstream-source> object for package NAME, using JSONISH as the
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source for metadata."
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(match jsonish
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((version . dictionary)
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(upstream-source
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(package name)
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(version version)
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(urls (filter-map (lambda (extension)
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(match (assoc-ref dictionary extension)
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(#f
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#f)
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((? string? relative-url)
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(string-append "mirror://gnome/sources/"
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name "/" relative-url))))
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'("tar.lz" "tar.xz" "tar.bz2" "tar.gz")))))))
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(define (latest-gnome-release package)
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"Return the latest release of PACKAGE, a GNOME package, or #f if it could
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not be determined."
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(define %not-dot
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(char-set-complement (char-set #\.)))
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(define (even-minor-version? version)
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(match (string-tokenize version %not-dot)
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(((= string->number major) (= string->number minor) . rest)
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(and minor (even? minor)))
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(((= string->number major) . _)
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;; It should at last start with a digit.
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major)))
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(define upstream-name
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;; Some packages like "NetworkManager" have camel-case names.
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(package-upstream-name package))
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(guard (c ((http-get-error? c)
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(if (= 404 (http-get-error-code c))
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#f
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(raise c))))
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(let* ((port (http-fetch/cached
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(string->uri (string-append
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"https://ftp.gnome.org/pub/gnome/sources/"
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upstream-name "/cache.json"))
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;; ftp.gnome.org supports 'if-Modified-Since', so the local
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;; cache can expire early.
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#:ttl (* 60 10)
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;; Hide messages about URL redirects.
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#:log-port (%make-void-port "w")))
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(json (json->scm port)))
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(close-port port)
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(match json
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(#(4 releases _ ...)
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(let* ((releases (assoc-ref releases upstream-name))
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(latest (fold (match-lambda*
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(((key . value) result)
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(cond ((even-minor-version? key)
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(match result
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(#f
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(cons key value))
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((newest . _)
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(if (version>? key newest)
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(cons key value)
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result))))
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(else
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result))))
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#f
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releases)))
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(and latest
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(jsonish->upstream-source upstream-name latest))))))))
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(define %gnome-updater
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(upstream-updater
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(name 'gnome)
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(description "Updater for GNOME packages")
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(pred (url-prefix-predicate "mirror://gnome/"))
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(latest latest-gnome-release)))
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