Add docker-machine-driver-xhyve Formula

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

@@ -0,0 +1,43 @@
+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/releases/download/v0.2.1/docker-machine-driver-xhyve"
+  sha256 "d56db4635ad2f711d73b44508405277bddd5af439af2c82dbdd0da116e8d1380"
+
+  head do
+    url "https://github.com/zchee/docker-machine-driver-xhyve.git"
+
+    depends_on "go" => :build
+  end
+
+  depends_on "docker-machine"
+
+  def install
+    if build.head?
+      contents = Dir["{*,.git,.gitignore}"]
+      gopath = buildpath/"gopath"
+      (gopath/"src/github.com/zchee/docker-machine-driver-xhyve").install contents
+
+      ENV["GOPATH"] = gopath
+      ENV["GO15VENDOREXPERIMENT"] = "1"
+
+      cd gopath/"src/github.com/zchee/docker-machine-driver-xhyve" do
+        ENV["GIT_COMMIT"] = `git rev-parse --short HEAD 2>/dev/null`.gsub(/\n/,"")
+        system "go", "build", "-o", "docker-machine-driver-xhyve", "-ldflags", "'-w -s'", "-ldflags", "-X 'github.com/zchee/docker-machine-driver-xhyve/xhyve.GitCommit=#{ENV['GIT_COMMIT']}'", "./main.go"
+        bin.install "docker-machine-driver-xhyve"
+      end
+    else
+      bin.install "docker-machine-driver-xhyve"
+    end
+  end
+
+  def caveats; <<-EOS.undent
+    docker-machine-driver-xhyve requires root privileges to correctly setup vmnet networking.
+    Please change the driver's owner and set the setuid bit:
+      sudo chown root:wheel #{bin}/docker-machine-driver-xhyve
+      sudo chmod u+s #{bin}/docker-machine-driver-xhyve
+    EOS
+  end
+end