;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020, 2022 Hartmut Goebel <h.goebel@crazy-compilers.com>
;;;
;;; 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 hexpm-download)
  #:use-module (srfi srfi-26)
  #:export (hexpm-package-url
            hexpm-uri))

;;;
;;; Definitions for the hex.pm repository,
;;; combined here since different build-systems use it.
;;;

;; URL and paths from
;; https://github.com/hexpm/specifications/blob/master/endpoints.md
(define %hexpm-repo-url
  (make-parameter "https://repo.hex.pm"))

(define hexpm-package-url
  (string-append (%hexpm-repo-url) "/tarballs/"))

(define (hexpm-uri name version)
  "Return a URI string for the package hosted at hex.pm corresponding to NAME
and VERSION."
  (string-append hexpm-package-url name "-" version ".tar"))