;;;; eclipse.scm -- Mthl's eclipse package definition
;;; Copyright © 2018 Mathieu Lirzin <mthl@gnu.org>
;;;
;;; This program 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.
;;;
;;; This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

(define-module (mthl packages eclipse)
  #:use-module (guix packages)
  #:use-module (gnu packages base)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages elf)
  #:use-module (gnu packages glib)
  #:use-module (gnu packages gtk)
  #:use-module (gnu packages java)
  #:use-module (gnu packages xorg)
  #:use-module (guix download)
  #:use-module (guix build-system trivial)
  #:use-module ((guix licenses) #:prefix license:))

(define-public eclipse-java
  ;; XXX: This package is not built from source.
  (package
    (name "eclipse-java")
    (version "oxygen")
    ;; TODO: Handle i686 alternate origin and augment 'supported-systems'.
    (source (origin
	      (method url-fetch)
	      (uri (string-append
		    "https://www.eclipse.org/downloads/download.php?"
		    "r=1&nf=1&file=/technology/epp/downloads/release/"
		    version "/3a/" name "-"
		    version "-3a-linux-gtk-x86_64.tar.gz"))
	      (sha256
	       (base32
		"0m7y7jfm059w01x9j5b5qkinjjmhkyygpjabhjf19fg2smxmwcim"))))
    (build-system trivial-build-system)
    (arguments
     `(#:modules ((guix build utils))
       #:builder
       (begin
	 (use-modules (guix build utils))
	 (let* ((source  (assoc-ref %build-inputs "source"))
		(out     (assoc-ref %outputs "out"))
		(eclipse (string-append out "/eclipse/eclipse")))
	   (mkdir-p (string-append out "/bin"))
	   (set-path-environment-variable "PATH" '("bin")
					  (map cdr %build-inputs))
	   (and
	    (invoke "tar" "xvf" source "-C" out)
	    (let ((ld-so (string-append (assoc-ref %build-inputs "libc")
					"/lib/ld-linux-x86-64.so.2")))
	      (invoke "patchelf" "--set-interpreter" ld-so eclipse))
	    (let ((jdk (assoc-ref %build-inputs "jdk")))
	      (define (libdir input)
		(string-append (assoc-ref %build-inputs input) "/lib"))

	      (wrap-program eclipse
		`("PATH" prefix (,(string-append jdk "/bin")))
		`("LD_LIBRARY_PATH" prefix ,(map libdir
						 '("gtk+" "libxtst" "glib"))))
	      (symlink eclipse (string-append out "/bin/eclipse"))
	      #t))))))
    (native-inputs
     `(("tar" ,tar)
       ("gzip" ,gzip)
       ("patchelf" ,patchelf)))
    (inputs
     `(("bash" ,bash)
       ("glib" ,glib)
       ("gtk+" ,gtk+)
       ("jdk" ,icedtea-8)
       ("libc" ,glibc)
       ("libxtst" ,libxtst)))
    (supported-systems '("x86_64-linux"))
    (synopsis "Java Integrated Development Environment")
    (description
     "Eclipse is an integrated development environment (IDE) used in computer
programming, in particular for Java development.  It contains a base workspace
and an extensible plug-in system for customizing the environment.")
    (home-page "https://www.eclipse.org/")
    (license license:mpl2.0)))