ninvaders: import from homebrew/games.

Formula/ninvaders.rb

@@ -0,0 +1,22 @@
+class Ninvaders < Formula
+  desc "Space Invaders in the terminal"
+  homepage "http://ninvaders.sourceforge.net/"
+  url "https://downloads.sourceforge.net/project/ninvaders/ninvaders/0.1.1/ninvaders-0.1.1.tar.gz"
+  sha256 "bfbc5c378704d9cf5e7fed288dac88859149bee5ed0850175759d310b61fd30b"
+
+  def install
+    ENV.j1 # this formula's build system can't parallelize
+    inreplace "Makefile" do |s|
+      s.change_make_var! "CC", ENV.cc
+      # gcc-4.2 doesn't like the lack of space here
+      s.gsub! "-o$@", "-o $@"
+    end
+    system "make" # build the binary
+    bin.install "nInvaders"
+  end
+
+  test do
+    assert_match "nInvaders #{version}",
+      shell_output("#{bin}/nInvaders -h 2>&1", 1)
+  end
+end