;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2019 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2021 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 build-system rakudo)
  #:use-module (guix store)
  #:use-module (guix utils)
  #:use-module (guix gexp)
  #:use-module (guix monads)
  #:use-module (guix search-paths)
  #:use-module (guix build-system)
  #:use-module (guix build-system gnu)
  #:use-module (guix packages)
  #:export (%rakudo-build-system-modules
            rakudo-build
            rakudo-build-system))

;; Commentary:
;;
;; Standard build and install procedure for packages using the Rakudo
;; build system to be installed as system libraries.  This is
;; implemented as an extension of `gnu-build-system'.
;;
;; Code:

(define %rakudo-build-system-modules
  ;; Build-side modules imported by default.
  `((guix build rakudo-build-system)
    ,@%gnu-build-system-modules))

(define (default-rakudo)
  "Return the default Rakudo package."

  ;; Do not use `@' to avoid introducing circular dependencies.
  (let ((module (resolve-interface '(gnu packages perl6))))
    (module-ref module 'rakudo)))

(define (default-prove6)
  "Return the default perl6-tap-harness package for tests."
  (let ((module (resolve-interface '(gnu packages perl6))))
    (module-ref module 'perl6-tap-harness)))

(define (default-zef)
  "Return the default perl6-zef package."
  (let ((module (resolve-interface '(gnu packages perl6))))
    (module-ref module 'perl6-zef)))

(define* (lower name
                #:key source inputs native-inputs outputs
                system target
                (rakudo (default-rakudo))
                (prove6 (default-prove6))
                (zef (default-zef))
                (with-prove6? #t)
                (with-zef? #t)
                #:allow-other-keys
                #:rest arguments)
  "Return a bag for NAME."
  (define private-keywords
    '(#:target #:rakudo #:prove6 #:zef #:inputs #:native-inputs))

  (and (not target)                               ;XXX: no cross-compilation
       (bag
         (name name)
         (system system)
         (host-inputs `(,@(if source
                              `(("source" ,source))
                              '())
                        ,@inputs

                        ;; Keep the standard inputs of 'gnu-build-system'.
                        ,@(standard-packages)))
         (build-inputs `(("rakudo" ,rakudo)
                         ,@(if with-prove6?
                               `(("perl6-tap-harness" ,prove6)
                                 ,@(if with-zef?
                                       `(("perl6-zef" ,zef))
                                       '()))
                               '())
                         ,@native-inputs))
         (outputs outputs)
         (build rakudo-build)
         (arguments (strip-keyword-arguments private-keywords arguments)))))

(define* (rakudo-build name inputs
                       #:key
                       source
                       (search-paths '())
                       (tests? #t)
                       (phases '%standard-phases)
                       (outputs '("out"))
                       (system (%current-system))
                       (guile #f)
                       (with-zef? #t)
                       (with-prove6? #t)
                       (imported-modules %rakudo-build-system-modules)
                       (modules '((guix build rakudo-build-system)
                                  (guix build utils))))
  "Build SOURCE using PERL6, and with INPUTS."
  (define builder
    (with-imported-modules imported-modules
      #~(begin
          (use-modules #$@(sexp->gexp modules))
          (rakudo-build #:name #$name
                        #:source #+source
                        #:search-paths '#$(sexp->gexp
                                           (map search-path-specification->sexp
                                                search-paths))
                        #:phases #$phases
                        #:system #$system
                        #:tests? #$tests?
                        #:outputs #$(outputs->gexp outputs)
                        #:inputs #$(input-tuples->gexp inputs)))))

  (mlet %store-monad ((guile (package->derivation (or guile (default-guile))
                                                  system #:graft? #f)))
    (gexp->derivation name builder
                      #:system system
                      #:guile-for-build guile)))

(define rakudo-build-system
  (build-system
    (name 'rakudo)
    (description "The standard Rakudo build system")
    (lower lower)))

;;; rakudo.scm ends here
