class Scalapack < Formula
  desc "High-performance linear algebra for distributed memory machines"
  homepage "https://www.netlib.org/scalapack/"
  url "https://www.netlib.org/scalapack/scalapack-2.0.2.tgz"
  sha256 "0c74aeae690fe5ee4db7926f49c5d0bb69ce09eea75beb915e00bba07530395c"
  revision 11

  bottle do
    cellar :any
    sha256 "5bf8bbc0b68389315eded0c528b1517813e38b4d07ae3bcb6f1e81fd73150615" => :mojave
    sha256 "b4599a8dc3909bd6849e929ba7a552de00d31a76b727dacad65fb110088fa9d8" => :high_sierra
    sha256 "2a028b68a4dc31c1dd5c8032d80e6678bbd89ae696aecb10956f06db6c659275" => :sierra
    sha256 "06d91fc5df52e81396eaa62fb738239463ac069e592966b96a4a8e6a335c48fb" => :el_capitan
  end

  depends_on "cmake" => :build
  depends_on "gcc" # for gfortran
  depends_on "open-mpi"
  depends_on "veclibfort" if build.without?("openblas")
  depends_on "openblas" => :optional

  def install
    if build.with? "openblas"
      blas = "-L#{Formula["openblas"].opt_lib} -lopenblas"
    else
      blas = "-L#{Formula["veclibfort"].opt_lib} -lvecLibFort"
    end

    mkdir "build" do
      system "cmake", "..", *std_cmake_args, "-DBUILD_SHARED_LIBS=ON",
                      "-DBLAS_LIBRARIES=#{blas}", "-DLAPACK_LIBRARIES=#{blas}"
      system "make", "all"
      system "make", "install"
    end

    pkgshare.install "EXAMPLE"
  end

  test do
    cp_r pkgshare/"EXAMPLE", testpath
    cd "EXAMPLE" do
      system "mpif90", "-o", "xsscaex", "psscaex.f", "pdscaexinfo.f", "-L#{opt_lib}", "-lscalapack"
      assert `mpirun -np 4 ./xsscaex | grep 'INFO code' | awk '{print $NF}'`.to_i.zero?
      system "mpif90", "-o", "xdscaex", "pdscaex.f", "pdscaexinfo.f", "-L#{opt_lib}", "-lscalapack"
      assert `mpirun -np 4 ./xdscaex | grep 'INFO code' | awk '{print $NF}'`.to_i.zero?
      system "mpif90", "-o", "xcscaex", "pcscaex.f", "pdscaexinfo.f", "-L#{opt_lib}", "-lscalapack"
      assert `mpirun -np 4 ./xcscaex | grep 'INFO code' | awk '{print $NF}'`.to_i.zero?
      system "mpif90", "-o", "xzscaex", "pzscaex.f", "pdscaexinfo.f", "-L#{opt_lib}", "-lscalapack"
      assert `mpirun -np 4 ./xzscaex | grep 'INFO code' | awk '{print $NF}'`.to_i.zero?
    end
  end
end