Merge pull request #293 from minektur/master

add package for nethack4

packages/nethack4.rb

+require 'package'
+
+class Nethack4 < Package
+  # "nethack4" fork of nethack with a few patches and a modern build system
+  version '4.3.0-beta2'
+  source_url 'http://nethack4.org/media/releases/nethack4-4.3-beta2.tar.gz'
+  source_sha1 'e261c0ac618589a47e63525ed56eb17e72b14754'
+
+  depends_on 'buildessential'
+  depends_on 'ncurses'
+  depends_on 'bison'
+  depends_on 'flex'
+  depends_on 'perl'
+
+  
+  def self.build
+    target=CREW_BREW_DIR+"nethack4-4.3-beta2/build"
+    system "mkdir -p " + target
+    Dir.chdir target  do
+      #build with rpath pointing at /usr/local
+      system "/usr/local/bin/perl ../aimake --config-only -i /usr/local/ --directory-layout=prefix --without=gui"  
+      system "/usr/local/bin/perl ../aimake"
+    end
+  end
+  
+  def self.install
+    target=CREW_BREW_DIR+"nethack4-4.3-beta2/build"
+    Dir.chdir target  do
+      #install in destdir so package manager can keep track
+      system "/usr/local/bin/perl ../aimake --install-only -i #{CREW_DEST_DIR}/usr/local/ --directory-layout=prefix --without=gui"  
+    end
+  end
+end