class Libsass < Formula
  desc "C implementation of a Sass compiler"
  homepage "https://github.com/sass/libsass"
  url "https://github.com/sass/libsass.git",
      :tag => "3.5.0",
      :revision => "60f839158eff1f1bb84cb44f0f0c4bce3ed86a6d"
  head "https://github.com/sass/libsass.git"

  bottle do
    cellar :any
    sha256 "1781a67932d37b3069a759f80a63f010445f3741b667fbe1ac815c75d31cba0f" => :high_sierra
    sha256 "68ac4ce77020cf3bea7f0e53c0c525b7bfdc12fb4dbaee85d2d24f7e1b06ca13" => :sierra
    sha256 "eadba244cba65c67514c9c7618fc95045925a8810cb8d1ff6b1e836f29065c6a" => :el_capitan
  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
      #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", "-L#{lib}", "-lsass"
    system "./test"
  end
end