class SuiteSparse < Formula
  desc "Suite of Sparse Matrix Software"
  homepage "http://faculty.cse.tamu.edu/davis/suitesparse.html"
  url "https://github.com/DrTimothyAldenDavis/SuiteSparse/archive/v5.6.0.tar.gz"
  sha256 "76d34d9f6dafc592b69af14f58c1dc59e24853dcd7c2e8f4c98ffa223f6a1adb"

  bottle do
    cellar :any
    sha256 "8eb58bbbd72d6ccc7a4aba9b2809a6dbd644fa885ff4928c1e407d468312b1a3" => :catalina
    sha256 "d120874fd9475e4b65f2314da7db2cad5b20e2ece303c58a6cbd6dd36f8e47cf" => :mojave
    sha256 "d578edbc2eb5813a86a85b7e2af8083bfcf3dc6aa265263b9c1c87feeb2cbd4a" => :high_sierra
  end

  depends_on "cmake" => :build
  depends_on "metis"
  depends_on "openblas"

  conflicts_with "mongoose", :because => "suite-sparse vendors libmongoose.dylib"

  def install
    mkdir "GraphBLAS/build" do
      system "cmake", "..", *std_cmake_args
    end

    args = [
      "INSTALL=#{prefix}",
      "BLAS=-L#{Formula["openblas"].opt_lib} -lopenblas",
      "LAPACK=$(BLAS)",
      "MY_METIS_LIB=-L#{Formula["metis"].opt_lib} -lmetis",
      "MY_METIS_INC=#{Formula["metis"].opt_include}",
    ]
    system "make", "library", *args
    system "make", "install", *args
    lib.install Dir["**/*.a"]
    pkgshare.install "KLU/Demo/klu_simple.c"
  end

  test do
    system ENV.cc, "-o", "test", pkgshare/"klu_simple.c",
           "-L#{lib}", "-lsuitesparseconfig", "-lklu"
    assert_predicate testpath/"test", :exist?
    assert_match "x [0] = 1", shell_output("./test")
  end
end