133 lines
4.7 KiB
Scheme
133 lines
4.7 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2015 David Thompson <davet@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 gem)
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#:use-module (ice-9 match)
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#:use-module (ice-9 pretty-print)
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#:use-module (rnrs bytevectors)
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#:use-module (json)
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#:use-module (web uri)
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#:use-module (guix import utils)
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#:use-module (guix import json)
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#:use-module (guix packages)
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#:use-module (guix licenses)
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#:use-module (guix base32)
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#:export (gem->guix-package))
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(define (rubygems-fetch name)
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"Return an alist representation of the RubyGems metadata for the package NAME,
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or #f on failure."
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(json-fetch
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(string-append "https://rubygems.org/api/v1/gems/" name ".json")))
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(define (ruby-package-name name)
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"Given the NAME of a package on RubyGems, return a Guix-compliant name for
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the package."
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(if (string-prefix? "ruby-" name)
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(snake-case name)
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(string-append "ruby-" (snake-case name))))
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(define (hex-string->bytevector str)
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"Convert the hexadecimal encoded string STR to a bytevector."
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(define hex-char->int
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(match-lambda
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(#\0 0)
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(#\1 1)
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(#\2 2)
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(#\3 3)
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(#\4 4)
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(#\5 5)
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(#\6 6)
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(#\7 7)
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(#\8 8)
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(#\9 9)
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(#\a 10)
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(#\b 11)
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(#\c 12)
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(#\d 13)
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(#\e 14)
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(#\f 15)))
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(define (read-byte i)
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(let ((j (* 2 i)))
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(+ (hex-char->int (string-ref str (1+ j)))
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(* (hex-char->int (string-ref str j)) 16))))
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(let* ((len (/ (string-length str) 2))
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(bv (make-bytevector len)))
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(let loop ((i 0))
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(if (= i len)
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bv
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(begin
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(bytevector-u8-set! bv i (read-byte i))
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(loop (1+ i)))))))
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(define (make-gem-sexp name version hash home-page description
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dependencies licenses)
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"Return the `package' s-expression for a Ruby package with the given NAME,
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VERSION, HASH, HOME-PAGE, DESCRIPTION, DEPENDENCIES, and LICENSES."
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`(package
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(name ,(ruby-package-name name))
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(version ,version)
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(source (origin
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(method url-fetch)
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(uri (rubygems-uri ,name version))
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(sha256
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(base32
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,(bytevector->nix-base32-string
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(hex-string->bytevector hash))))))
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(build-system ruby-build-system)
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,@(if (null? dependencies)
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'()
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`((propagated-inputs
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(,'quasiquote
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,(map (lambda (name)
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`(,name
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(,'unquote
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,(string->symbol name))))
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dependencies)))))
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(synopsis ,description) ; nothing better to use
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(description ,description)
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(home-page ,home-page)
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(license ,(match licenses
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(() #f)
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((license) (license->symbol license))
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(_ `(list ,@(map license->symbol licenses)))))))
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(define* (gem->guix-package package-name #:optional version)
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"Fetch the metadata for PACKAGE-NAME from rubygems.org, and return the
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`package' s-expression corresponding to that package, or #f on failure."
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(let ((package (rubygems-fetch package-name)))
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(and package
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(let ((name (assoc-ref package "name"))
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(version (assoc-ref package "version"))
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(hash (assoc-ref package "sha"))
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(description (assoc-ref package "info"))
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(home-page (assoc-ref package "homepage_uri"))
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(dependencies (map (lambda (dep)
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(let ((name (assoc-ref dep "name")))
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(if (string=? name "bundler")
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"bundler" ; special case, no prefix
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(ruby-package-name name))))
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(assoc-ref* package "dependencies"
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"runtime")))
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(licenses (map string->license
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(assoc-ref package "licenses"))))
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(make-gem-sexp name version hash home-page
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description dependencies licenses)))))
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