class RakudoStar < Formula
  desc "Perl 6 compiler"
  homepage "http://rakudo.org/"
  url "http://rakudo.org/downloads/star/rakudo-star-2016.11.tar.gz"
  sha256 "05ebc77171bba8314657cfcd64701f9688a20caab9a371da19d5d9105cbde8d8"

  bottle do
    sha256 "c86632a923419652755fa6203e161de91ebfc348102bd67f9df39fb4d63036b8" => :sierra
    sha256 "3750726d8319e300f11d8e8d02321f4fd194147b8ad262a025ec6987a3300df8" => :el_capitan
    sha256 "71b5d1828f0c732c24e2dbc61e5121660087d079127646cd26bb55c3865fa12c" => :yosemite
  end

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

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

  conflicts_with "parrot"

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

    ENV.deparallelize # 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"

    # Panda is now in share/perl6/site/bin, so we need to symlink it too.
    bin.install_symlink Dir[share/"perl6/site/bin/*"]

    # 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