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+;;; Chickadee Game Toolkit
+;;; Copyright © 2016 David Thompson <davet@gnu.org>
+;;;
+;;; Chickadee 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.
+;;;
+;;; Chickadee 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/>.
+
+;;; Commentary:
+;;
+;; Development environment for GNU Guix.
+;;
+;; To setup the development environment, run the following:
+;;
+;;    guix environment -l guix.scm
+;;    ./bootstrap && ./configure;
+;;
+;; To build the development snapshot, run:
+;;
+;;    guix build -f guix.scm
+;;
+;; To install the development snapshot, run:
+;;
+;;    guix install -f guix.scm
+;;
+;;; Code:
+
+(use-modules (ice-9 match)
+             (srfi srfi-1)
+             (guix packages)
+             (guix licenses)
+             (guix git-download)
+             (guix build-system gnu)
+             (gnu packages)
+             (gnu packages autotools)
+             (gnu packages pkg-config)
+             (gnu packages texinfo)
+             (gnu packages guile)
+             (gnu packages gl)
+             (gnu packages sdl)
+             (gnu packages maths)
+             (gnu packages image))
+
+(define (package-with-guile p guile)
+  (package
+    (inherit p)
+    (inputs
+     (map (match-lambda
+            (("guile" _)
+             `("guile" ,guile))
+            (input input))
+          (package-inputs p)))))
+
+(define (package-with-guile-next p)
+  (package-with-guile p guile-next))
+
+(define guile-sdl2
+  (let ((commit "9ec24e3f997e40ebde5e8b0057e0324e21fd93a4"))
+    (package
+      (name "guile-sdl2")
+      (version (string-append "0.1.2-1." (string-take commit 7)))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "git://dthompson.us/guile-sdl2.git")
+                      (commit commit)))
+                (file-name (string-append name "-" version "-checkout"))
+                (sha256
+                 (base32
+                  "1aczhrg5s83242hlj6i258axf8cr8a2pvp1kdfk55cr4gf1ajf5x"))))
+      (build-system gnu-build-system)
+      (arguments
+       '(#:configure-flags
+         (list (string-append "--with-libsdl2-prefix="
+                              (assoc-ref %build-inputs "sdl2"))
+               (string-append "--with-libsdl2-image-prefix="
+                              (assoc-ref %build-inputs "sdl2-image"))
+               (string-append "--with-libsdl2-ttf-prefix="
+                              (assoc-ref %build-inputs "sdl2-ttf"))
+               (string-append "--with-libsdl2-mixer-prefix="
+                              (assoc-ref %build-inputs "sdl2-mixer")))
+         #:make-flags '("GUILE_AUTO_COMPILE=0")
+         #:phases
+         (modify-phases %standard-phases
+           (add-after 'unpack 'bootstrap
+             (lambda _ (zero? (system* "sh" "bootstrap"))))
+           (add-after 'configure 'patch-makefile
+             (lambda _
+               ;; Install compiled Guile files in the expected place.
+               (substitute* '("Makefile")
+                 (("^godir = .*$")
+                  "godir = $(moddir)\n")))))))
+      (native-inputs
+       `(("autoconf" ,autoconf)
+         ("automake" ,automake)
+         ("pkg-config" ,pkg-config)
+         ("texinfo" ,texinfo)))
+      (inputs
+       `(("guile" ,guile-next)
+         ("sdl2" ,sdl2)
+         ("sdl2-image" ,sdl2-image)
+         ("sdl2-mixer" ,sdl2-mixer)
+         ("sdl2-ttf" ,sdl2-ttf)))
+      (synopsis "Guile bindings for SDL2")
+      (description "Guile-sdl2 provides pure Guile Scheme bindings to the
+SDL2 C shared library via the foreign function interface.")
+      (home-page "https://git.dthompson.us/guile-sdl2.git")
+      (license lgpl3+))))
+
+(package
+  (name "chickadee")
+  (version "0.1")
+  (source #f)
+  (build-system gnu-build-system)
+  (native-inputs
+   `(("autoconf" ,autoconf)
+     ("automake" ,automake)
+     ("pkg-config" ,pkg-config)
+     ("texinfo" ,texinfo)))
+  (inputs
+   `(("guile" ,guile-next)))
+  (propagated-inputs
+   `(("guile-opengl" ,(package-with-guile-next guile-opengl))
+     ("guile-sdl2" ,(package-with-guile-next guile-sdl2))))
+  (synopsis "Game development toolkit for Guile Scheme")
+  (description "Chickadee is a game development toolkit for Guile
+Scheme.  It contains all of the basic components needed to develop
+2D/3D video games.")
+  (home-page "https://dthompson.us/projects/chickadee.html")
+  (license gpl3+))