class RakudoStar < Formula
  desc "Perl 6 compiler"
  homepage "http://rakudo.org/"
  url "http://rakudo.org/downloads/star/rakudo-star-2015.06.tar.gz"
  sha256 "126491a2c9f408239fb8ed94d5369c9839e3fbe284fdfbfc4e45160ce2db5bc7"

  bottle do
    sha256 "7c4607d5b4180eb9b361af35cdcfa71cba1f97e7f8333743e7a42f8e888d566a" => :yosemite
    sha256 "d88519efcd261f8576bb50f4efddbf091424aedfeed865d974de747cefca3f68" => :mavericks
    sha256 "f8e802cb028f97e6c2894f487c5a229a8d7ca1039bd6f3c770518dc6c90221da" => :mountain_lion
  end

  option "with-jvm", "Build also for jvm as an alternate backend."

  conflicts_with "parrot"

  depends_on "gmp" => :optional
  depends_on "icu4c" => :optional
  depends_on "pcre" => :optional
  depends_on "libffi"

  def install
    libffi = Formula["libffi"]
    ENV.remove "CPPFLAGS", "-I#{libffi.include}"
    ENV.prepend "CPPFLAGS", "-I#{libffi.lib}/libffi-#{libffi.version}/include"

    ENV.j1  # An intermittent race condition causes random build failures.

    backends = ["moar"]
    generate = ["--gen-moar"]

    backends << "jvm" if build.with? "jvm"

    system "perl", "Configure.pl", "--prefix=#{prefix}", "--backends=" + backends.join(","), *generate
    system "make"
    system "make", "install"

    # Move the man pages out of the top level into share.
    # Not all backends seem to generate man pages at this point (moar does not, parrot does),
    # so we need to check if the directory exists first.
    if File.directory?("#{prefix}/man")
      mv "#{prefix}/man", share
    end
  end

  test do
    out = `#{bin}/perl6 -e 'loop (my $i = 0; $i < 10; $i++) { print $i }'`
    assert_equal "0123456789", out
    assert_equal 0, $?.exitstatus
  end
end