require "language/go"

class Gnatsd < Formula
  desc "Lightweight cloud messaging system"
  homepage "https://nats.io"
  url "https://github.com/nats-io/gnatsd/archive/v0.7.2.tar.gz"
  sha256 "f71d77ff31fc31770cf8e140d084ecfa91f7a8333f945bac1ff44732901680b5"
  head "https://github.com/apcera/gnatsd.git"

  bottle do
    cellar :any_skip_relocation
    revision 1
    sha256 "8f2ed4766107495ba638febfdaf5f225d5ed3393021d2d2b98056ed0d8ffd971" => :el_capitan
    sha256 "f0aa019cb44ed19334585450a70be74a3a22dd96c5f0af14769f1f6ff43a5b59" => :yosemite
    sha256 "9c12dceb0b70351db64ebf3d3ac9725d2be4e761936ddad97235d8f5d8510638" => :mavericks
  end

  depends_on "go" => :build

  go_resource "github.com/nats-io/nats" do
    url "https://github.com/nats-io/nats.git",
    :revision => "355b5b97e0842dc94f1106729aa88e33e06317ca"
  end

  go_resource "golang.org/x/crypto" do
    url "https://go.googlesource.com/crypto.git",
    :revision => "f18420efc3b4f8e9f3d51f6bd2476e92c46260e9"
  end

  def install
    ENV["GOPATH"] = buildpath
    Language::Go.stage_deps resources, buildpath/"src"

    mkdir_p "src/github.com/nats-io"
    ln_s buildpath, "src/github.com/nats-io/gnatsd"
    system "go", "install", "github.com/nats-io/gnatsd"
    system "go", "build", "-o", bin/"gnatsd", "gnatsd.go"
  end

  plist_options :manual => "gnatsd"

  def plist; <<-EOS.undent
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1.0">
      <dict>
        <key>Label</key>
        <string>#{plist_name}</string>
        <key>ProgramArguments</key>
        <array>
          <string>#{opt_bin}/gnatsd</string>
        </array>
        <key>RunAtLoad</key>
        <true/>
      </dict>
    </plist>
    EOS
  end

  test do
    pid = fork do
      exec "#{bin}/gnatsd --port=8085 --pid=#{testpath}/pid --log=#{testpath}/log"
    end
    sleep 3

    begin
      assert_match version.to_s, shell_output("curl localhost:8085")
      assert File.exist?(testpath/"log")
    ensure
      Process.kill "SIGINT", pid
      Process.wait pid
    end
  end
end