;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 Hartmut Goebel <h.goebel@crazy-compilers.com>
;;;
;;; 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 java-utils)
  #:use-module (guix build utils)
  #:export (ant-build-javadoc
            install-jars
            install-javadoc))

(define (package-name-version store-dir)
  ; copied from haskell-build-system.scm - seeking for a more general solution
  "Given a store directory STORE-DIR return 'name-version' of the package."
  (let* ((base (basename store-dir)))
    (string-drop base
                 (+ 1 (string-index base #\-)))))

(define* (ant-build-javadoc #:key (target "javadoc") (make-flags '())
                            #:allow-other-keys)
  (zero? (apply system* `("ant" ,target ,@make-flags))))

(define* (install-jars jars-dir)
  "Helper for the case the build.xml does not include an install target."
  (lambda* (#:key outputs #:allow-other-keys)
    (let ((share (string-append (assoc-ref outputs "out")
                                "/share/java")))
      (for-each (lambda (f) (install-file f share))
                (find-files jars-dir "\\.jar$")))))

(define* (install-javadoc apidocs-dir)
  "Helper to install the javadocs."
  (lambda* (#:key outputs #:allow-other-keys)
    (let* ((out (assoc-ref outputs "out"))
           (docs (string-append (assoc-ref outputs "doc")
                                "/share/doc/" (package-name-version out) "/")))
      (mkdir-p docs)
      (copy-recursively apidocs-dir docs))))