;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2017 ng0 <ng0@infotropique.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 vim-build-system)
  #:use-module ((guix build gnu-build-system) #:prefix gnu:)
  #:use-module (guix build utils)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:export (%standard-phases
            vim-build))

;; Commentary:
;;
;; Builder-side code of the build procedure for vim packages.
;;
;; Code:

(define gnu:unpack (assoc-ref gnu:%standard-phases 'unpack))

(define* (unpack #:key source #:allow-other-keys)
  "Unpack SOURCE into the build directory.  SOURCE may be a compressed
archive, a directory or a '.vim' file."
  (if (any (cut string-suffix? <> source)
           (list ".vim" ".vital"))
      (begin
        (mkdir "source")
        (chdir "source")
        (copy-file source (strip-store-file-name source))
        #t)
      (gnu:unpack #:source source)))

(define* (install #:key outputs #:allow-other-keys)
  "Install the package contents."
  (let* ((out (assoc-ref outputs "out"))
         (source (getcwd))
         (vimfiles (string-append out "/share/vim/vimfiles")))
    (lambda (dir)
      (when (file-exists? dir)
        (copy-recursively dir (string-append vimfiles "/" dir))))
    (list "autoload" "after" "doc" "ftdetect" "ftplugin" "indent" "plugin" "rplugin" "syntax")
    ;(when (file-exists? "autoload")
    ;  (copy-recursively "autoload"
    ;                    (string-append vimfiles "/autoload")))
    ;(when (file-exists? "after")
    ;  (copy-recursively "after"
    ;                    (string-append vimfiles "/after")))
    ;(when (file-exists? "doc")
    ;  (copy-recursively "doc"
    ;                    (string-append vimfiles "/doc")))
    ;(when (file-exists? "ftdetect")
    ;  (copy-recursively "ftdetect"
    ;                    (string-append vimfiles "/ftdetect")))
    ;(when (file-exists? "ftplugin")
    ;  (copy-recursively "ftplugin"
    ;                    (string-append vimfiles "/ftplugin")))
    ;(when (file-exists? "indent")
    ;  (copy-recursively "indent"
    ;                    (string-append vimfiles "/indent")))
    ;(when (file-exists? "plugin")
    ;  (copy-recursively "plugin"
    ;                    (string-append vimfiles "/plugin")))
    ;(when (file-exists? "rplugin")
    ;  (copy-recursively "rplugin"
    ;                    (string-append vimfiles "/rplugin")))
    ;(when (file-exists? "syntax")
    ;  (copy-recursively "syntax"
    ;                    (string-append vimfiles "/syntax")))
    #t))

(define %standard-phases
  (modify-phases gnu:%standard-phases
    (replace 'unpack unpack)
    (delete 'configure)
    (delete 'check)
    (delete 'build)
    (replace 'install install)))

(define* (vim-build #:key inputs (phases %standard-phases)
                      #:allow-other-keys #:rest args)
  "Build the given vim package, applying all of PHASES in order."
  (apply gnu:gnu-build #:inputs inputs #:phases phases args))