class Libxml2 < Formula
  desc "GNOME XML library"
  homepage "http://xmlsoft.org"
  revision 4
  head "https://git.gnome.org/browse/libxml2.git"

  stable do
    url "http://xmlsoft.org/sources/libxml2-2.9.4.tar.gz"
    mirror "ftp://xmlsoft.org/libxml2/libxml2-2.9.4.tar.gz"
    sha256 "ffb911191e509b966deb55de705387f14156e1a56b21824357cdf0053233633c"

    # All patches upstream already. Remove whenever 2.9.5 is released.
    # Fixes CVE-2016-4658, CVE-2016-5131, CVE-2017-0663, CVE-2017-7375,
    # CVE-2017-7376, CVE-2017-9047, CVE-2017-9048, CVE-2017-9049 and
    # CVE-2017-9050.
    patch do
      url "https://mirrors.ocf.berkeley.edu/debian/pool/main/libx/libxml2/libxml2_2.9.4+dfsg1-3.1.debian.tar.xz"
      mirror "https://mirrorservice.org/sites/ftp.debian.org/debian/pool/main/libx/libxml2/libxml2_2.9.4+dfsg1-3.1.debian.tar.xz"
      sha256 "9de354bf1315f0e631505789a6059fdbcef3fd2c262b1573935cdf6acf0ee976"
      apply "patches/0003-Fix-NULL-pointer-deref-in-XPointer-range-to.patch",
            "patches/0004-Fix-comparison-with-root-node-in-xmlXPathCmpNodes.patch",
            "patches/0005-Fix-XPointer-paths-beginning-with-range-to.patch",
            "patches/0006-Disallow-namespace-nodes-in-XPointer-ranges.patch",
            "patches/0007-Fix-more-NULL-pointer-derefs-in-xpointer.c.patch",
            "patches/0008-Fix-attribute-decoding-during-XML-schema-validation.patch",
            "patches/0009-Increase-buffer-space-for-port-in-HTTP-redirect-supp.patch",
            "patches/0010-Prevent-unwanted-external-entity-reference.patch",
            "patches/0011-Fix-handling-of-parameter-entity-references.patch",
            "patches/0012-Fix-buffer-size-checks-in-xmlSnprintfElementContent.patch",
            "patches/0013-Fix-type-confusion-in-xmlValidateOneNamespace.patch"
    end
  end

  bottle do
    cellar :any
    sha256 "afd36afb4d3d51cb8bc5de392e9dc667d6e52b77e2887dc373ec5b9d69e8de47" => :sierra
    sha256 "d4fb605cef5b7508739ac0c9a459dfb193ecf65100c322929d4bb07bfaf9179a" => :el_capitan
    sha256 "2cb1c9ba0b6de38f0977ec7bf902bae11622881566e577a3378fd645e0ac6a76" => :yosemite
  end

  keg_only :provided_by_macos

  depends_on :python if MacOS.version <= :snow_leopard

  # These should return to being head-only whenever 2.9.5 is released.
  depends_on "autoconf" => :build
  depends_on "automake" => :build
  depends_on "libtool" => :build
  depends_on "pkg-config" => :build

  def install
    system "autoreconf", "-fiv"
    system "./configure", "--disable-dependency-tracking",
                          "--prefix=#{prefix}",
                          "--without-python",
                          "--without-lzma"
    system "make"
    ENV.deparallelize
    system "make", "install"

    cd "python" do
      # We need to insert our include dir first
      inreplace "setup.py", "includes_dir = [", "includes_dir = ['#{include}', '#{MacOS.sdk_path}/usr/include',"
      system "python", "setup.py", "install", "--prefix=#{prefix}"
    end
  end

  test do
    (testpath/"test.c").write <<-EOS.undent
      #include <libxml/tree.h>

      int main()
      {
        xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
        xmlNodePtr root_node = xmlNewNode(NULL, BAD_CAST "root");
        xmlDocSetRootElement(doc, root_node);
        xmlFreeDoc(doc);
        return 0;
      }
    EOS
    args = shell_output("#{bin}/xml2-config --cflags --libs").split
    args += %w[test.c -o test]
    system ENV.cc, *args
    system "./test"

    ENV.prepend_path "PYTHONPATH", lib/"python2.7/site-packages"
    system "python", "-c", "import libxml2"
  end
end