;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2021 Maxime Devos <maximedevos@telenet.be>
;;;
;;; 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 build-system minetest)
  #:use-module (guix build-system copy)
  #:use-module (guix build-system)
  #:export (minetest-mod-build-system))

;;
;; Build procedure for minetest mods.  This is implemented as an extension
;; of ‘copy-build-system’.
;;
;; Code:

(define (guix-name->mod-name package-name)
  ;; The "minetest-" prefix is useless.  Don't make it appear in the
  ;; ‘select mods’ menu when "modpack.conf" or "mod.conf" do not have
  ;; the "name" field set.
  (if (string-prefix? "minetest-" package-name)
      (substring package-name 9)
      package-name))

(define %standard-phases
  ;; The source code sometimes contains shell scripts which are used for
  ;; development but not at run time (e.g. listnodes.sh in
  ;; minetest-homedecor-modpack).  Don't make them retain a reference
  ;; to bash-minimal.
  '(modify-phases (@ (guix build copy-build-system) %standard-phases)
     (delete 'patch-source-shebangs)))

(define (lower-mod name . arguments)
  (define lower (build-system-lower copy-build-system))
  (apply lower
    name
    #:install-plan
    `'(("." ,(string-append "share/minetest/mods/"
                            (guix-name->mod-name name))))
    #:phases %standard-phases
    arguments))

(define minetest-mod-build-system
  (build-system
    (name 'minetest-mod)
    (description "The build system for minetest mods")
    (lower lower-mod)))

;;; minetest.scm ends here