package: added Homebrew formula.

doc/building.dox

@@ -330,6 +330,13 @@ This will compile binary and development packages, which will then appear in
 parent directory. If you need to modify CMake flags (enabling/disabling some
 features, for example), modify the last entry in `debian/rules`.
 
+@subsection building-packages-brew Homebrew formulas
+
+OS X Homebrew formulas are in `package/homebrew` directory. Download the `*.rb`
+file and install it using the following command:
+
+    brew install --HEAD magnum.rb
+
 @section building-windows-angle Building for ANGLE on Windows
 
 Magnum is able to run on ANGLE OpenGL-to-D3D translator. Download the code from

package/homebrew/magnum.rb

@@ -0,0 +1,20 @@
+# kate: indent-width 2;
+
+class Magnum < Formula
+  desc "C++11/C++14 and OpenGL 2D/3D graphics engine"
+  homepage "https://github.com/mosra/magnum"
+  head "git://github.com/mosra/magnum.git"
+
+  depends_on "cmake"
+  depends_on "corrade"
+  depends_on "sdl2"
+
+  def install
+    system "mkdir build"
+    cd "build" do
+      system "cmake", "-DCMAKE_BUILD_TYPE=Release", "-DCMAKE_INSTALL_PREFIX=#{prefix}", "-DWITH_AUDIO=ON", "-DWITH_SDL2APPLICATION=ON", "-DWITH_WINDOWLESSCGLAPPLICATION=ON", "-DWITH_CGLCONTEXT=ON", "-DWITH_MAGNUMFONT=ON", "-DWITH_MAGNUMFONTCONVERTER=ON", "-DWITH_OBJIMPORTER=ON", "-DWITH_TGAIMAGECONVERTER=ON", "-DWITH_TGAIMPORTER=ON", "-DWITH_WAVAUDIOIMPORTER=ON", "-DWITH_DISTANCEFIELDCONVERTER=ON", "-DWITH_FONTCONVERTER=ON", "-DWITH_MAGNUMINFO=ON", ".."
+      system "cmake", "--build", "."
+      system "cmake", "--build", ".", "--target", "install"
+    end
+  end
+end