Add docker-machine-driver-xhyve Formula

Library/Formula/docker-machine-driver-xhyve.rb

@@ -0,0 +1,39 @@
+require "language/go"
+
+class DockerMachineDriverXhyve < Formula
+  desc "Docker Machine driver for xhyve"
+  homepage "https://github.com/zchee/docker-machine-driver-xhyve"
+  url "https://github.com/zchee/docker-machine-driver-xhyve/archive/v0.2.1.tar.gz"
+  sha256 "11ed10c4ea45249e06c9efad0abf1c91b0ec9c4c2a0818ade78f19f41a17794c"
+
+  head "https://github.com/zchee/docker-machine-driver-xhyve.git"
+
+  depends_on :macos => :yosemite
+  depends_on "go" => :build
+  depends_on "docker-machine"
+
+  def install
+    (buildpath/"gopath/src/github.com/zchee/docker-machine-driver-xhyve").install Dir["{*,.git,.gitignore}"]
+
+    ENV["GOPATH"] = "#{buildpath}/gopath"
+    ENV["GO15VENDOREXPERIMENT"] = "1"
+
+    cd buildpath/"gopath/src/github.com/zchee/docker-machine-driver-xhyve" do
+      if build.head?
+        git_hash = `git rev-parse --short HEAD --quiet`.chomp
+        git_hash = " HEAD-#{git_hash}"
+      end
+      system "go", "build", "-o", bin/"docker-machine-driver-xhyve",
+      "-ldflags",
+      "'-w -s'",
+      "-ldflags",
+      "-X 'github.com/zchee/docker-machine-driver-xhyve/xhyve.GitCommit=Homebrew#{git_hash}'",
+      "./main.go"
+    end
+  end
+
+  test do
+    assert_match "xhyve-memory-size",
+    shell_output("#{Formula["docker-machine"].bin}/docker-machine create --driver xhyve -h")
+  end
+end