class Libsass < Formula
  desc "C implementation of a Sass compiler"
  homepage "https://github.com/sass/libsass"
  url "https://github.com/sass/libsass.git", :tag => "3.3.3", :revision => "bc1e6db3117d4769023a92344cd7f48dfddd4972"
  head "https://github.com/sass/libsass.git"

  bottle do
    cellar :any
    sha256 "3a3e4acd78199739a15eb12b4a2ebf6c3832bf7966937770190f62f899da00f8" => :el_capitan
    sha256 "f7884cee1ed36a916eb2c9f78d9dc121545d9b8d847b782c2726216e10115493" => :yosemite
    sha256 "5a1dcd8e73a1356d2c0673d3bafccfba33b822d374d015bf62936fd0b0d96587" => :mavericks
  end

  depends_on "autoconf" => :build
  depends_on "automake" => :build
  depends_on "libtool" => :build
  needs :cxx11

  def install
    ENV.cxx11
    system "autoreconf", "-fvi"
    system "./configure", "--prefix=#{prefix}", "--disable-silent-rules",
                          "--disable-dependency-tracking"
    system "make", "install"
  end

  test do
    # This will need to be updated when devel = stable due to API changes.
    (testpath/"test.c").write <<-EOS.undent
      #include <sass/context.h>
      #include <string.h>

      int main()
      {
        const char* source_string = "a { color:blue; &:hover { color:red; } }";
        struct Sass_Data_Context* data_ctx = sass_make_data_context(strdup(source_string));
        struct Sass_Options* options = sass_data_context_get_options(data_ctx);
        sass_option_set_precision(options, 1);
        sass_option_set_source_comments(options, false);
        sass_data_context_set_options(data_ctx, options);
        sass_compile_data_context(data_ctx);
        struct Sass_Context* ctx = sass_data_context_get_context(data_ctx);
        int err = sass_context_get_error_status(ctx);
        if(err != 0) {
          return 1;
        } else {
          return strcmp(sass_context_get_output_string(ctx), "a {\\n  color: blue; }\\n  a:hover {\\n    color: red; }\\n") != 0;
        }
      }
    EOS
    system ENV.cc, "-o", "test", "test.c", "-lsass"
    system "./test"
  end
end