class Gmsh < Formula
  desc "3D finite element grid generator with CAD engine"
  homepage "https://gmsh.info/"
  url "https://gmsh.info/src/gmsh-4.2.1-source.tgz"
  sha256 "1f11481e68900dc256f88aaed18d03e93b416ba01e9e8c3dc3f6d59a211f0561"
  head "https://gitlab.onelab.info/gmsh/gmsh.git"

  bottle do
    cellar :any
    sha256 "aab86ab999bf6ade1e1ea2ea7be406007dcfc53c5ff5096c1cf7453847750775" => :mojave
    sha256 "fea4b22f19680d89a2d9ae7b1ec9c0ebeaf50e7ec420f4d4d482ebe4c99b0774" => :high_sierra
    sha256 "c5e618ce037497df08b4ba24df64cf3aab7396bb4d2d51afbd258c7fb3f2dd63" => :sierra
  end

  depends_on "cmake" => :build
  depends_on "cairo"
  depends_on "fltk"
  depends_on "gcc" # for gfortran
  depends_on "open-mpi"
  depends_on "opencascade"

  def install
    args = std_cmake_args + %W[
      -DENABLE_OS_SPECIFIC_INSTALL=0
      -DGMSH_BIN=#{bin}
      -DGMSH_LIB=#{lib}
      -DGMSH_DOC=#{pkgshare}/gmsh
      -DGMSH_MAN=#{man}
      -DENABLE_BUILD_LIB=ON
      -DENABLE_BUILD_SHARED=ON
      -DENABLE_NATIVE_FILE_CHOOSER=ON
      -DENABLE_PETSC=OFF
      -DENABLE_SLEPC=OFF
      -DENABLE_OCC=ON
    ]

    ENV["CASROOT"] = Formula["opencascade"].opt_prefix

    mkdir "build" do
      system "cmake", "..", *args
      system "make"
      system "make", "install"

      # Move onelab.py into libexec instead of bin
      mkdir_p libexec
      mv bin/"onelab.py", libexec
    end
  end

  test do
    system "#{bin}/gmsh", "#{share}/doc/gmsh/tutorial/t1.geo", "-parse_and_exit"
  end
end