class Armadillo < Formula
  desc "C++ linear algebra library"
  homepage "https://arma.sourceforge.io/"
  url "https://downloads.sourceforge.net/project/arma/armadillo-9.900.3.tar.xz"
  sha256 "d615e736852a74b1753d217718e20f0d8dc4958ccc6dc975030563e18783fc0a"
  license "Apache-2.0"

  livecheck do
    url :stable
    regex(%r{url=.*?/armadillo[._-]v?(\d+(?:\.\d+)+)\.t}i)
  end

  bottle do
    cellar :any
    sha256 "38c123ba25c7b130e76697944a1a1ea0531d450eedde4a9518be6f72798efcc0" => :catalina
    sha256 "0a0a49d08b26352c259f41642032278571d3dc1a9162637bfe7b0d95f495ff3a" => :mojave
    sha256 "cdb4062c597ed78f51c8a9486a8b512c65a34817e3a73bb7998cbdaca2519cee" => :high_sierra
  end

  depends_on "cmake" => :build
  depends_on "pkg-config" => :build
  depends_on "arpack"
  depends_on "hdf5"
  depends_on "openblas"
  depends_on "superlu"
  depends_on "szip"

  def install
    ENV.prepend "CXXFLAGS", "-DH5_USE_110_API -DH5Ovisit_vers=1"

    system "cmake", ".", "-DDETECT_HDF5=ON", "-DALLOW_OPENBLAS_MACOS=ON", *std_cmake_args
    system "make", "install"
  end

  test do
    (testpath/"test.cpp").write <<~EOS
      #include <iostream>
      #include <armadillo>

      int main(int argc, char** argv) {
        std::cout << arma::arma_version::as_string() << std::endl;
      }
    EOS
    system ENV.cxx, "test.cpp", "-I#{include}", "-L#{lib}", "-larmadillo", "-o", "test"
    assert_equal shell_output("./test").to_i, version.to_s.to_i
  end
end