Homebrew Formula for installing dnsmasq with regex patch from Jan Seiffert See: http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2013q2/007124.html

dnsmasq-regex.rb

require 'formula'

class DnsmasqRegex < Formula
  homepage 'http://www.thekelleys.org.uk/dnsmasq/doc.html'
  url 'http://www.thekelleys.org.uk/dnsmasq/dnsmasq-2.66.tar.gz'
  sha256 '36232fa23d1a8efc6f84a29da5ff829c2aa40df857b9116a9320ea37b651a982'

  option 'with-idn', 'Compile with IDN support'

  depends_on "libidn" if build.include? 'with-idn'
  depends_on 'pkg-config' => :build
  depends_on 'pcre'
  
  def install
    ENV.deparallelize

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

    inreplace "src/config.h", "/* #define HAVE_REGEX */", "#define HAVE_REGEX"
    # Optional IDN support
    if build.include? 'with-idn'
      inreplace "src/config.h", "/* #define HAVE_IDN */", "#define HAVE_IDN"
    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 patches
    # add regex support
    "http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/attachments/20130428/b3fc0de0/attachment.obj"
  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_prefix}/sbin/dnsmasq</string>
          <string>--keep-in-foreground</string>
        </array>
        <key>KeepAlive</key>
        <dict>
          <key>NetworkState</key>
          <true/>
        </dict>
      </dict>
    </plist>
    EOS
  end
end