require 'formula'

def pgm_flags
  build.include? 'with-pgm' ? '--with-system-pgm' : ''
end

class Zeromq < Formula
  homepage 'http://www.zeromq.org/'
  url 'http://download.zeromq.org/zeromq-2.2.0.tar.gz'
  sha1 'e4bc024c33d3e62f658640625e061ce4e8bd1ff1'

  head 'https://github.com/zeromq/libzmq.git'

  devel do
    url 'http://download.zeromq.org/zeromq-3.2.0-rc1.tar.gz'
    sha1 '1a5195a61150c0a653798e5babde70f473a8a3b0'
  end

  depends_on 'pkg-config' => :build
  depends_on 'libpgm' if build.include? 'with-pgm'

  if build.head?
    depends_on :automake
    depends_on :libtool
  end

  fails_with :llvm do
    build 2326
    cause "Segfault while linking"
  end

  option :universal
  option 'with-pgm', 'Build with PGM extension'

  # This can be removed at stable >= 3.2.0 because ENV.universal_binary works.
  def build_fat
    # make 32-bit
    system "CFLAGS=\"$CFLAGS -arch i386\" CXXFLAGS=\"$CXXFLAGS -arch i386\" ./configure --disable-dependency-tracking --prefix='#{prefix}' #{pgm_flags}"
    system "make"
    system "mv src/.libs src/libs-32"
    system "make clean"

    # make 64-bit
    system "CFLAGS=\"$CFLAGS -arch x86_64\" CXXFLAGS=\"$CXXFLAGS -arch x86_64\" ./configure --disable-dependency-tracking --prefix='#{prefix}' #{pgm_flags}"
    system "make"
    system "mv src/.libs/libzmq.1.dylib src/.libs/libzmq.64.dylib"

    # merge UB
    system "lipo", "-create", "src/libs-32/libzmq.1.dylib",
                              "src/.libs/libzmq.64.dylib",
                   "-output", "src/.libs/libzmq.1.dylib"
  end

  def do_config
    args = ["--disable-dependency-tracking", "--prefix=#{prefix}"]
    if build.include? 'with-pgm'
      # Use HB libpgm-5.2 because their internal 5.1 is b0rked.
      ENV['OpenPGM_CFLAGS'] = %x[pkg-config --cflags openpgm-5.2].chomp
      ENV['OpenPGM_LIBS'] = %x[pkg-config --libs openpgm-5.2].chomp
      args << "--with-system-pgm"
    end
    system "./configure", *args
  end

  def install
    system "./autogen.sh" if build.head?

    if build.universal?
      if build.devel? or build.head?
        ENV.universal_binary
        do_config
      else
        build_fat
      end
    else
      do_config
    end

    system "make"
    system "make install"
  end

  def caveats; <<-EOS.undent
    To install the zmq gem on 10.6 with the system Ruby on a 64-bit machine,
    you may need to do:

        ARCHFLAGS="-arch x86_64" gem install zmq -- --with-zmq-dir=#{HOMEBREW_PREFIX}

    If you want to build the Java bindings from https://github.com/zeromq/jzmq
    you will need the Java Developer Package from http://connect.apple.com/
    EOS
  end
end