homebrew-core/Formula/root.rb

class Root < Formula
  desc "Object oriented framework for large scale data analysis"
  homepage "https://root.cern.ch/"
  url "https://root.cern.ch/download/root_v6.24.06.source.tar.gz"
  sha256 "907f69f4baca1e4f30eeb4979598ca7599b6aa803ca046e80e25b6bbaa0ef522"
  license "LGPL-2.1-or-later"
  head "https://github.com/root-project/root.git", branch: "master"

  livecheck do
    url "https://root.cern.ch/download/"
    regex(/href=.*?root[._-]v?(\d+(?:\.\d*[02468])+)\.source\.t/i)
  end

  bottle do
    sha256 arm64_big_sur: "3422ef3c0940bbc0c4d0fd117410592d78fa7901398b8bc15a1acd705888bd6d"
    sha256 monterey:      "610a18739dc98dd6fbec130cd84fd84f9c70e2742467264286e7eca51fcd51ee"
    sha256 big_sur:       "a8650bed59d9f3ee1a39e488dc4e59c454803a0a4001cb007160b6079680d3e5"
    sha256 catalina:      "f9444e3459eb93fdbe984efb9b74ad3955688be1177c518b3311f5d9a1f76dc2"
    sha256 x86_64_linux:  "9f92ea828e81a1749c4da6b574d88601f37ed844478286419055d2a8d453ef24"
  end

  depends_on "cmake" => :build
  depends_on "ninja" => :build
  depends_on "cfitsio"
  depends_on "davix"
  depends_on "fftw"
  depends_on "gcc" # for gfortran
  depends_on "gl2ps"
  depends_on "glew"
  depends_on "graphviz"
  depends_on "gsl"
  depends_on "lz4"
  depends_on "numpy" # for tmva
  depends_on "openblas"
  depends_on "openssl@1.1"
  depends_on "pcre"
  depends_on "python@3.9"
  depends_on "sqlite"
  depends_on "tbb"
  depends_on :xcode if MacOS.version <= :catalina
  depends_on "xrootd"
  depends_on "xz" # for LZMA
  depends_on "zstd"

  uses_from_macos "libxml2"
  uses_from_macos "zlib"

  on_linux do
    depends_on "libxft"
    depends_on "libxpm"
  end

  skip_clean "bin"

  def install
    ENV.append "LDFLAGS", "-Wl,-rpath,#{lib}/root" if OS.linux?

    inreplace "cmake/modules/SearchInstalledSoftware.cmake" do |s|
      # Enforce secure downloads of vendored dependencies. These are
      # checksummed in the cmake file with sha256.
      s.gsub! "http://lcgpackages", "https://lcgpackages"
      # Patch out check that skips using brewed glew.
      s.gsub! "CMAKE_VERSION VERSION_GREATER 3.15", "CMAKE_VERSION VERSION_GREATER 99.99"
    end

    args = std_cmake_args + %W[
      -DCLING_CXX_PATH=clang++
      -DCMAKE_INSTALL_ELISPDIR=#{elisp}
      -DPYTHON_EXECUTABLE=#{Formula["python@3.9"].opt_bin}/python3
      -Dbuiltin_cfitsio=OFF
      -Dbuiltin_freetype=ON
      -Dbuiltin_glew=OFF
      -Ddavix=ON
      -Dfftw3=ON
      -Dfitsio=ON
      -Dfortran=ON
      -Dgdml=ON
      -Dgnuinstall=ON
      -Dimt=ON
      -Dmathmore=ON
      -Dminuit2=ON
      -Dmysql=OFF
      -Dpgsql=OFF
      -Dpyroot=ON
      -Droofit=ON
      -Dssl=ON
      -Dtmva=ON
      -Dxrootd=ON
      -GNinja
    ]

    cxx_version = (MacOS.version < :mojave) ? 14 : 17
    args << "-DCMAKE_CXX_STANDARD=#{cxx_version}"

    # Homebrew now sets CMAKE_INSTALL_LIBDIR to /lib, which is incorrect
    # for ROOT with gnuinstall, so we set it back here.
    args << "-DCMAKE_INSTALL_LIBDIR=lib/root"

    # Workaround the shim directory being embedded into the output
    inreplace "build/unix/compiledata.sh", "`type -path $CXX`", ENV.cxx

    mkdir "builddir" do
      system "cmake", "..", *args
      system "ninja", "install"

      chmod 0755, Dir[bin/"*.*sh"]

      version = Language::Python.major_minor_version Formula["python@3.9"].opt_bin/"python3"
      pth_contents = "import site; site.addsitedir('#{lib}/root')\n"
      (prefix/"lib/python#{version}/site-packages/homebrew-root.pth").write pth_contents
    end
  end

  def caveats
    <<~EOS
      As of ROOT 6.22, you should not need the thisroot scripts; but if you
      depend on the custom variables set by them, you can still run them:

      For bash users:
        . #{HOMEBREW_PREFIX}/bin/thisroot.sh
      For zsh users:
        pushd #{HOMEBREW_PREFIX} >/dev/null; . bin/thisroot.sh; popd >/dev/null
      For csh/tcsh users:
        source #{HOMEBREW_PREFIX}/bin/thisroot.csh
      For fish users:
        . #{HOMEBREW_PREFIX}/bin/thisroot.fish
    EOS
  end

  test do
    (testpath/"test.C").write <<~EOS
      #include <iostream>
      void test() {
        std::cout << "Hello, world!" << std::endl;
      }
    EOS

    # Test ROOT command line mode
    system "#{bin}/root", "-b", "-l", "-q", "-e", "gSystem->LoadAllLibraries(); 0"

    # Test ROOT executable
    assert_equal "\nProcessing test.C...\nHello, world!\n",
                 shell_output("root -l -b -n -q test.C")

    # Test linking
    (testpath/"test.cpp").write <<~EOS
      #include <iostream>
      #include <TString.h>
      int main() {
        std::cout << TString("Hello, world!") << std::endl;
        return 0;
      }
    EOS
    flags = %w[cflags libs ldflags].map { |f| "$(root-config --#{f})" }
    flags << "-Wl,-rpath,#{lib}/root" if OS.linux?
    shell_output("$(root-config --cxx) test.cpp #{flags.join(" ")}")
    assert_equal "Hello, world!\n", shell_output("./a.out")

    # Test Python module
    system Formula["python@3.9"].opt_bin/"python3", "-c", "import ROOT; ROOT.gSystem.LoadAllLibraries()"
  end
end