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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 David Thompson <davet@gnu.org>
;;; Copyright © 2016 Ben Woodcroft <donttrustben@gmail.com>
;;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
;;; Copyright © 2020 Ludovic Courtès <ludo@gnu.org>
;;;
;;; 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 gem)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:use-module (guix json)
#:use-module ((guix download) #:prefix download:)
#:use-module (guix import utils)
#:use-module (guix import json)
#:use-module (guix packages)
#:use-module (guix upstream)
#:use-module ((guix licenses) #:prefix license:)
#:use-module (guix base16)
#:use-module (guix base32)
#:use-module ((guix build-system ruby) #:select (rubygems-uri))
#:export (gem->guix-package
%gem-updater
gem-recursive-import))
;; Gems as defined by the API at <https://rubygems.org/api/v1/gems>.
(define-json-mapping <gem> make-gem gem?
json->gem
(name gem-name) ;string
(platform gem-platform) ;string
(version gem-version) ;string
(authors gem-authors) ;string
(licenses gem-licenses "licenses" ;list of strings
(lambda (licenses)
;; This is sometimes #nil (the JSON 'null' value). Arrange
;; to always return a list.
(cond ((not licenses) '())
((vector? licenses) (vector->list licenses))
(else '()))))
(info gem-info)
(sha256 gem-sha256 "sha" ;bytevector
base16-string->bytevector)
(home-page gem-home-page "homepage_uri") ;string
(dependencies gem-dependencies "dependencies" ;<gem-dependencies>
json->gem-dependencies))
(define-json-mapping <gem-dependencies> make-gem-dependencies
gem-dependencies?
json->gem-dependencies
(development gem-dependencies-development ;list of <gem-dependency>
"development"
json->gem-dependency-list)
(runtime gem-dependencies-runtime ;list of <gem-dependency>
"runtime"
json->gem-dependency-list))
(define (json->gem-dependency-list vector)
(if vector
(map json->gem-dependency (vector->list vector))
'()))
(define-json-mapping <gem-dependency> make-gem-dependency gem-dependency?
json->gem-dependency
(name gem-dependency-name) ;string
(requirements gem-dependency-requirements)) ;string
(define (rubygems-fetch name)
"Return a <gem> record for the package NAME, or #f on failure."
(and=> (json-fetch
(string-append "https://rubygems.org/api/v1/gems/" name ".json"))
json->gem))
(define (ruby-package-name name)
"Given the NAME of a package on RubyGems, return a Guix-compliant name for
the package."
(if (string-prefix? "ruby-" name)
(snake-case name)
(string-append "ruby-" (snake-case name))))
(define (make-gem-sexp name version hash home-page synopsis description
dependencies licenses)
"Return the `package' s-expression for a Ruby package with the given NAME,
VERSION, HASH, HOME-PAGE, DESCRIPTION, DEPENDENCIES, and LICENSES."
`(package
(name ,(ruby-package-name name))
(version ,version)
(source (origin
(method url-fetch)
(uri (rubygems-uri ,name version))
(sha256
(base32
,(bytevector->nix-base32-string hash)))))
(build-system ruby-build-system)
,@(if (null? dependencies)
'()
`((propagated-inputs
(,'quasiquote
,(map (lambda (name)
`(,name
(,'unquote
,(string->symbol name))))
dependencies)))))
(synopsis ,synopsis)
(description ,description)
(home-page ,home-page)
(license ,(match licenses
(() #f)
((license) (license->symbol license))
(_ `(list ,@(map license->symbol licenses)))))))
(define* (gem->guix-package package-name #:optional (repo 'rubygems) version)
"Fetch the metadata for PACKAGE-NAME from rubygems.org, and return the
`package' s-expression corresponding to that package, or #f on failure."
(let ((gem (rubygems-fetch package-name)))
(if gem
(let* ((dependencies-names (map gem-dependency-name
(gem-dependencies-runtime
(gem-dependencies gem))))
(dependencies (map (lambda (dep)
(if (string=? dep "bundler")
"bundler" ; special case, no prefix
(ruby-package-name dep)))
dependencies-names))
(licenses (map string->license (gem-licenses gem))))
(values (make-gem-sexp (gem-name gem) (gem-version gem)
(gem-sha256 gem) (gem-home-page gem)
(gem-info gem)
(beautify-description (gem-info gem))
dependencies
licenses)
dependencies-names))
(values #f '()))))
(define (guix-package->gem-name package)
"Given a PACKAGE built from rubygems.org, return the name of the
package on RubyGems."
(let ((source-url (and=> (package-source package) origin-uri)))
;; The URL has the form:
;; 'https://rubygems.org/downloads/' +
;; package name + '-' + version + '.gem'
;; e.g. "https://rubygems.org/downloads/hashery-2.1.1.gem"
(substring source-url 31 (string-rindex source-url #\-))))
(define (string->license str)
"Convert the string STR into a license object."
(match str
("GNU LGPL" license:lgpl2.0)
("GPL" license:gpl3)
((or "BSD" "BSD License") license:bsd-3)
((or "MIT" "MIT license" "Expat license") license:expat)
("Public domain" license:public-domain)
((or "Apache License, Version 2.0" "Apache 2.0") license:asl2.0)
(_ #f)))
(define (gem-package? package)
"Return true if PACKAGE is a gem package from RubyGems."
(define (rubygems-url? url)
(string-prefix? "https://rubygems.org/downloads/" url))
(let ((source-url (and=> (package-source package) origin-uri))
(fetch-method (and=> (package-source package) origin-method)))
(and (eq? fetch-method download:url-fetch)
(match source-url
((? string?)
(rubygems-url? source-url))
((source-url ...)
(any rubygems-url? source-url))))))
(define (latest-release package)
"Return an <upstream-source> for the latest release of PACKAGE."
(let* ((gem-name (guix-package->gem-name package))
(gem (rubygems-fetch gem-name))
(version (gem-version gem))
(url (rubygems-uri gem-name version)))
(upstream-source
(package (package-name package))
(version version)
(urls (list url)))))
(define %gem-updater
(upstream-updater
(name 'gem)
(description "Updater for RubyGem packages")
(pred gem-package?)
(latest latest-release)))
(define* (gem-recursive-import package-name #:optional version)
(recursive-import package-name '()
#:repo->guix-package gem->guix-package
#:guix-name ruby-package-name))
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