;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016 Leo Famulari <leo@famulari.name>
;;; Copyright © 2016 Pjotr Prins <pjotr.public12@thebird.nl>
;;;
;;; 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 (gnu packages elixir)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix build-system gnu)
  #:use-module (guix download)
  #:use-module (guix packages)
  #:use-module (gnu packages)
  #:use-module (gnu packages base)  ; for patch
  #:use-module (gnu packages erlang)
  #:use-module (gnu packages version-control))

(define-public elixir
  (package
   (name "elixir")
   (version "1.3.2")
   (source (origin
            (method url-fetch)
            (uri (string-append
                  "https://github.com/elixir-lang/elixir/archive/v"
                  version ".tar.gz"))
            (file-name (string-append name "-" version ".tar.gz"))
            (sha256
             (base32
              "0jsc6kl7f74yszcypdv3w3vhyc9qfqav8nwc41in082m0vpfy95y"))))
   (build-system gnu-build-system)
   (native-inputs
    `(("patch" ,patch)
      ("patch/elixir-disable-failing-tests"
       ,(search-patch "elixir-disable-failing-tests.patch"))
      ("patch/elixir-disable-mix-tests"
       ,(search-patch "elixir-disable-mix-tests.patch"))))
   (inputs
    `(("erlang" ,erlang)
      ("git" ,git)))
   (arguments
    `(#:phases (modify-phases %standard-phases
      (add-after 'unpack 'replace-git-path
        (lambda _
          (substitute* '("lib/elixir/lib/system.ex"
                         "lib/mix/lib/mix/scm/git.ex")
                       (("cmd\\('git") (string-append "cmd('" (which "git")))
                       (("cmd\\(\"git") (string-append "cmd(\"" (which "git"))))
          #t))
      (add-after 'unpack 'set-env
        (lambda _ (setenv "HOME" "/tmp")))
      (delete 'configure)
      (add-before 'build 'rewrite-path
        (lambda* (#:key inputs #:allow-other-keys)
                 (substitute* "bin/elixir"
                              (("ERL_EXEC=\"erl\"")
                               (string-append "ERL_EXEC=" (which "erl"))))))
      (add-after 'build 'disable-breaking-elixir-tests
        ;; when patching tests as part of source the build breaks, so we do
        ;; it after the build phase
        (lambda* (#:key inputs #:allow-other-keys)
          (and
           (zero? (system* "patch" "--force" "-p1" "-i"
                           (assoc-ref inputs "patch/elixir-disable-failing-tests")))
           (zero? (system* "patch" "--force" "-p1" "-i"
                           (assoc-ref inputs "patch/elixir-disable-mix-tests")))
           ;; Tests currently fail in these two files:
           (delete-file "./lib/mix/test/mix/tasks/deps.git_test.exs")
           (delete-file "./lib/mix/test/mix/shell_test.exs")))))
      #:test-target "test" ;; 3124 tests, 0 failures, 11 skipped
      #:make-flags (list (string-append "PREFIX=" %output))))
   (home-page "http://elixir-lang.org/")
   (synopsis "The Elixir programming language")
   (description "Elixir is a dynamic, functional language used to
build scalable and maintainable applications.  Elixir leverages the
Erlang VM, known for running low-latency, distributed and
fault-tolerant systems, while also being successfully used in web
development and the embedded software domain.")
   (license license:asl2.0)))