class Dnsmasq < Formula
  desc "Lightweight DNS forwarder and DHCP server"
  homepage "http://www.thekelleys.org.uk/dnsmasq/doc.html"
  url "http://www.thekelleys.org.uk/dnsmasq/dnsmasq-2.75.tar.gz"
  sha256 "f8252c0a0ba162c2cd45f81140c7c17cc40a5fca2b869d1a420835b74acad294"

  bottle do
    cellar :any
    sha256 "f245adcc7718bd0c8167fa0518f286f261755aa7c54b029c1d6e8e26625b7193" => :yosemite
    sha256 "c3aad8472b1d51d81c14ecfecec69cfa94a43adb07a445c11880ad0c0c9ffc1e" => :mavericks
    sha256 "08084970fe50a3d7a325ca40c3b7ead00bcf3a67be5415e97c1557857c211323" => :mountain_lion
  end

  option "with-libidn", "Compile with IDN support"
  option "with-dnssec", "Compile with DNSSEC support"

  deprecated_option "with-idn" => "with-libidn"

  depends_on "pkg-config" => :build
  depends_on "libidn" => :optional
  depends_on "nettle" if build.with? "dnssec"

  def install
    ENV.deparallelize

    # Fix etc location
    inreplace "src/config.h", "/etc/dnsmasq.conf", "#{etc}/dnsmasq.conf"

    # Optional IDN support
    if build.with? "libidn"
      inreplace "src/config.h", "/* #define HAVE_IDN */", "#define HAVE_IDN"
    end

    # Optional DNSSEC support
    if build.with? "dnssec"
      inreplace "src/config.h", "/* #define HAVE_DNSSEC */", "#define HAVE_DNSSEC"
    end

    # Fix compilation on Lion
    ENV.append_to_cflags "-D__APPLE_USE_RFC_3542" if MacOS.version >= :lion
    inreplace "Makefile" do |s|
      s.change_make_var! "CFLAGS", ENV.cflags
    end

    system "make", "install", "PREFIX=#{prefix}"

    prefix.install "dnsmasq.conf.example"
  end

  def caveats; <<-EOS.undent
    To configure dnsmasq, copy the example configuration to #{etc}/dnsmasq.conf
    and edit to taste.

      cp #{opt_prefix}/dnsmasq.conf.example #{etc}/dnsmasq.conf
    EOS
  end

  plist_options :startup => true

  def plist; <<-EOS.undent
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple Computer//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_sbin}/dnsmasq</string>
          <string>--keep-in-foreground</string>
          <string>-C</string>
          <string>#{etc}/dnsmasq.conf</string>
        </array>
        <key>RunAtLoad</key>
        <true/>
        <key>KeepAlive</key>
        <true/>
      </dict>
    </plist>
    EOS
  end

  test do
    system "#{sbin}/dnsmasq", "--test"
  end
end