;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 ng0 <ng0@crash.cx>
;;;
;;; 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 vim)
  #:use-module (guix utils)
  #:use-module (guix packages)
  #:use-module (guix derivations)
  #:use-module (guix store)
  #:use-module (guix search-paths)
  #:use-module (guix build-system)
  #:use-module (guix build-system gnu)
  #:use-module (ice-9 match)
  #:export (%vim-build-system-modules
            vim-build
            vim-build-system))

;; Commentary:
;;
;; Standard build procedure for vim packages.  This is
;; implemented as an extension of 'gnu-build-system'.
;;
;; Code:

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

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

  (bag
    (name name)
    (system system)
    (host-inputs `(,@(if source
                         `(("source" ,source))
                         '())
                   ,@inputs
                   ,(list "tar" (module-ref (resolve-interface '(gnu packages base)) 'tar))
                   ,@(let ((compression (resolve-interface '(gnu packages compression))))
                       (map (match-lambda
                              ((name package)
                               (list name (module-ref compression package))))
                            `(("gzip" gzip)
                              ("bzip2" bzip2)
                              ("unzip" unzip)
                              ("xz" xz))))))
    (build-inputs native-inputs)
    (outputs outputs)
    (build vim-build)
    (arguments (strip-keyword-arguments private-keywords arguments))))

(define* (vim-build store name inputs
                     #:key source
                     (tests? #t)
                     (test-target "test")
                     (configure-flags ''())
                     (phases '(@ (guix build vim-build-system)
                                 %standard-phases))
                     (outputs '("out"))
                     (search-paths '())
                     (system (%current-system))
                     (guile #f)
                     (imported-modules %vim-build-system-modules)
                     (modules '((guix build vim-build-system)
                                (guix build utils))))
  "Build SOURCE with INPUTS."
  (define builder
    `(begin
       (use-modules ,@modules)
       (vim-build #:name ,name
                   #:source ,(match (assoc-ref inputs "source")
                               (((? derivation? source))
                                (derivation->output-path source))
                               ((source)
                                source)
                               (source
                                source))
                   #:configure-flags ,configure-flags
                   #:system ,system
                   #:test-target ,test-target
                   #:tests? ,tests?
                   #:phases ,phases
                   #:outputs %outputs
                   #:search-paths ',(map search-path-specification->sexp
                                         search-paths)
                   #:inputs %build-inputs)))

  (define guile-for-build
    (match guile
      ((? package?)
       (package-derivation store guile system #:graft? #f))
      (#f                                         ; the default
       (let* ((distro (resolve-interface '(gnu packages commencement)))
              (guile  (module-ref distro 'guile-final)))
         (package-derivation store guile system #:graft? #f)))))

  (build-expression->derivation store name builder
                                #:inputs inputs
                                #:system system
                                #:modules imported-modules
                                #:outputs outputs
                                #:guile-for-build guile-for-build))

(define vim-build-system
  (build-system
    (name 'vim)
    (description "The build system for vim packages")
    (lower lower)))