;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020 raingloom <raingloom@riseup.net>
;;; Copyright © 2021 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2021 Xinglu Chen <public@yoctocell.xyz>
;;;
;;; 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 chicken)
  #:use-module (guix utils)
  #:use-module (guix gexp)
  #:use-module (guix store)
  #: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 (%chicken-build-system-modules
            chicken-build
            chicken-build-system
            egg-uri))

(define* (egg-uri name version #:optional (extension ".tar.gz"))
  "Return a URI string for the CHICKEN egg corresponding to NAME and VERSION.
EXTENSION is the file name extension, such as '.tar.gz'."
  (string-append "https://code.call-cc.org/egg-tarballs/5/"
                 name "/" name "-" version extension))

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

(define (default-chicken)
  ;; Lazily resolve the binding to avoid a circular dependency.
  ;; TODO is this actually needed in every build system?
  (let ((chicken (resolve-interface '(gnu packages chicken))))
      (module-ref chicken 'chicken)))

(define* (lower name
                #:key source inputs native-inputs outputs system target
                (chicken (default-chicken))
                #:allow-other-keys
                #:rest arguments)
  "Return a bag for NAME."
  (define private-keywords
    '(#:target #:chicken #:inputs #:native-inputs))

  ;; TODO: cross-compilation support
  (and (not target)
       (bag
         (name name)
         (system system)
         (host-inputs `(,@(if source
                              `(("source" ,source))
                              '())
                        ,@inputs

                        ;; Keep the standard inputs of 'gnu-build-system', since
                        ;; Chicken compiles Scheme by using C as an intermediate
                        ;; language.
                        ,@(standard-packages)))
         (build-inputs `(("chicken" ,chicken)
                         ,@native-inputs))
         (outputs outputs)
         (build chicken-build)
         (arguments (strip-keyword-arguments private-keywords arguments)))))

(define* (chicken-build name inputs
                        #:key
                        source
                        (phases '%standard-phases)
                        (outputs '("out"))
                        (search-paths '())
                        (egg-name "")
                        (unpack-path "")
                        (build-flags ''())
                        (tests? #t)
                        (system (%current-system))
                        (guile #f)
                        (imported-modules %chicken-build-system-modules)
                        (modules '((guix build chicken-build-system)
                                   (guix build union)
                                   (guix build utils))))
  (define builder
    (with-imported-modules imported-modules
      #~(begin
          (use-modules #$@(sexp->gexp modules))
          (chicken-build #:name #$name
                         #:source #+source
                         #:system #$system
                         #:phases #$phases
                         #:outputs #$(outputs->gexp outputs)
                         #:search-paths '#$(sexp->gexp
                                            (map search-path-specification->sexp
                                                 search-paths))
                         #:egg-name #$egg-name
                         #:unpack-path #$unpack-path
                         #:build-flags #$build-flags
                         #:tests? #$tests?
                         #: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 chicken-build-system
  (build-system
    (name 'chicken)
    (description
     "Build system for Chicken Scheme programs")
    (lower lower)))
