class Folly < Formula
  desc "Collection of reusable C++ library artifacts developed at Facebook"
  homepage "https://github.com/facebook/folly"
  url "https://github.com/facebook/folly/archive/v2018.08.20.00.tar.gz"
  sha256 "3a18fa5564feee64aa5bcdaf3bbe1c63b4ed728da23dcc8ab9c3d8416d71a3cd"
  head "https://github.com/facebook/folly.git"

  bottle do
    cellar :any
    sha256 "c232212e0bc865e0a3ec1412b3baf49bb5258e69917df05842d220192ed83b18" => :mojave
    sha256 "c09c21e837ceda82e208795bd38fa1d6a2a1a893f429321886bd6e05e568f058" => :high_sierra
    sha256 "704e798f82bf53a7ee956fb8f80d2cdf29c193683f1986bf39ab8fd00761c81d" => :sierra
    sha256 "2dab2f61c69959cbfbfd0482f16909a5fa8dc309ab63fa1f5913bdd99587f639" => :el_capitan
  end

  depends_on "autoconf" => :build
  depends_on "automake" => :build
  depends_on "libtool" => :build
  depends_on "pkg-config" => :build
  depends_on "double-conversion"
  depends_on "glog"
  depends_on "gflags"
  depends_on "boost"
  depends_on "libevent"
  depends_on "xz"
  depends_on "snappy"
  depends_on "lz4"
  depends_on "openssl"

  # https://github.com/facebook/folly/issues/451
  depends_on :macos => :el_capitan

  needs :cxx11

  # Known issue upstream. They're working on it:
  # https://github.com/facebook/folly/pull/445
  fails_with :gcc => "6"

  def install
    ENV.cxx11

    cd "folly" do
      system "autoreconf", "-fvi"
      system "./configure", "--prefix=#{prefix}", "--disable-silent-rules",
                            "--disable-dependency-tracking"
      system "make"
      system "make", "install"
    end
  end

  test do
    (testpath/"test.cc").write <<~EOS
      #include <folly/FBVector.h>
      int main() {
        folly::fbvector<int> numbers({0, 1, 2, 3});
        numbers.reserve(10);
        for (int i = 4; i < 10; i++) {
          numbers.push_back(i * 2);
        }
        assert(numbers[6] == 12);
        return 0;
      }
    EOS
    system ENV.cxx, "-std=c++11", "test.cc", "-I#{include}", "-L#{lib}",
                    "-lfolly", "-o", "test"
    system "./test"
  end
end