Add a formula for linuxkit

Signed-off-by: Justin Cormack <justin.cormack@docker.com>

Author: justincormack

Formula/linuxkit.rb

@@ -0,0 +1,25 @@
+require "language/go"
+
+class Linuxkit < Formula
+  desc "Lightweight Linux districution tool"
+  homepage "https://github.com/linuxkit/linuxkit"
+  head "https://github.com/linuxkit/linuxkit.git"
+
+  depends_on "go" => :build
+
+  def install
+    mkdir_p buildpath/"src/github.com/linuxkit"
+    ln_s buildpath, buildpath/"src/github.com/linuxkit/linuxkit"
+
+    ENV["GOPATH"] = "#{buildpath}/Godeps/_workspace:#{buildpath}"
+
+    system "make", "local"
+
+    bin.install "bin/linuxkit"
+  end
+
+  test do
+    output = shell_output(bin/"moby version")
+    assert_match "moby version", output
+  end
+end