homebrew-core/Formula/pypy3.rb

class Pypy3 < Formula
  desc "Implementation of Python 3 in Python"
  homepage "https://pypy.org/"
  url "https://downloads.python.org/pypy/pypy3.7-v7.3.3-src.tar.bz2"
  sha256 "f6c96401f76331e474cca2d14437eb3b2f68a0f27220a6dcbc537445fe9d5b78"
  license "MIT"
  head "https://foss.heptapod.net/pypy/pypy", using: :hg, branch: "py3.7"

  livecheck do
    url "https://downloads.python.org/pypy/"
    regex(/href=.*?pypy3(?:\.\d+)*[._-]v?(\d+(?:\.\d+)+)-src\.t/i)
  end

  bottle do
    sha256 catalina: "856c421f1051e802767e23bdfd58727fb168dcffff904ab1eb486a57fc614f47"
    sha256 mojave:   "a2f43940fe3fb2604aa01c9f7720c26c74b3cb9e09b7bf0846f4341ded919e17"
  end

  depends_on "pkg-config" => :build
  depends_on "pypy" => :build
  depends_on arch: :x86_64
  depends_on "gdbm"
  # pypy does not find system libffi, and its location cannot be given
  # as a build option
  depends_on "libffi" if DevelopmentTools.clang_build_version >= 1000
  depends_on "openssl@1.1"
  depends_on "sqlite"
  depends_on "tcl-tk"
  depends_on "xz"

  uses_from_macos "expat"
  uses_from_macos "libffi"
  uses_from_macos "unzip"
  uses_from_macos "zlib"

  resource "setuptools" do
    url "https://files.pythonhosted.org/packages/94/23/e9e3d96500c063129a19feb854efbb01e6ffe7d913f1da8176692418ab8e/setuptools-51.1.1.tar.gz"
    sha256 "0b43d1e0e0ac1467185581c2ceaf86b5c1a1bc408f8f6407687b0856302d1850"
  end

  resource "pip" do
    url "https://files.pythonhosted.org/packages/ca/1e/d91d7aae44d00cd5001957a1473e4e4b7d1d0f072d1af7c34b5899c9ccdf/pip-20.3.3.tar.gz"
    sha256 "79c1ac8a9dccbec8752761cb5a2df833224263ca661477a2a9ed03ddf4e0e3ba"
  end

  def install
    ENV.prepend_path "PKG_CONFIG_PATH", "#{prefix}/opt/openssl/lib/pkgconfig:#{prefix}/opt/tcl-tk/lib/pkgconfig"
    ENV.prepend "LDFLAGS", "-L#{prefix}/opt/tcl-tk/lib"
    ENV.prepend "CPPFLAGS", "-I#{prefix}/opt/tcl-tk/include"

    # Having PYTHONPATH set can cause the build to fail if another
    # Python is present, e.g. a Homebrew-provided Python 2.x
    # See https://github.com/Homebrew/homebrew/issues/24364
    ENV["PYTHONPATH"] = ""
    ENV["PYPY_USESSION_DIR"] = buildpath

    python = Formula["pypy"].opt_bin/"pypy"
    cd "pypy/goal" do
      system python, buildpath/"rpython/bin/rpython",
             "-Ojit", "--shared", "--cc", ENV.cc, "--verbose",
             "--make-jobs", ENV.make_jobs, "targetpypystandalone.py"
    end

    libexec.mkpath
    cd "pypy/tool/release" do
      system python, "package.py", "--archive-name", "pypy3", "--targetdir", "."
      system "tar", "-C", libexec.to_s, "--strip-components", "1", "-xf", "pypy3.tar.bz2"
    end

    (libexec/"lib").install libexec/"bin/#{shared_library("libpypy3-c")}" => shared_library("libpypy3-c")

    MachO::Tools.change_install_name("#{libexec}/bin/pypy3",
                                     "@rpath/libpypy3-c.dylib",
                                     "#{libexec}/lib/libpypy3-c.dylib")
    MachO::Tools.change_dylib_id("#{libexec}/lib/libpypy3-c.dylib",
                                 "#{opt_libexec}/lib/libpypy3-c.dylib")

    (libexec/"lib-python").install "lib-python/3"
    libexec.install %w[include lib_pypy]

    # The PyPy binary install instructions suggest installing somewhere
    # (like /opt) and symlinking in binaries as needed. Specifically,
    # we want to avoid putting PyPy's Python.h somewhere that configure
    # scripts will find it.
    bin.install_symlink libexec/"bin/pypy3"
    bin.install_symlink libexec/"bin/pypy" => "pypy3.7"
    lib.install_symlink libexec/"lib/#{shared_library("libpypy3-c")}"
  end

  def post_install
    # Precompile cffi extensions in lib_pypy
    # list from create_cffi_import_libraries in pypy/tool/release/package.py
    %w[_sqlite3 _curses syslog gdbm _tkinter].each do |module_name|
      quiet_system bin/"pypy3", "-c", "import #{module_name}"
    end

    # Post-install, fix up the site-packages and install-scripts folders
    # so that user-installed Python software survives minor updates, such
    # as going from 1.7.0 to 1.7.1.

    # Create a site-packages in the prefix.
    prefix_site_packages.mkpath

    # Symlink the prefix site-packages into the cellar.
    libexec.install_symlink prefix_site_packages

    # Tell distutils-based installers where to put scripts
    scripts_folder.mkpath
    (distutils/"distutils.cfg").atomic_write <<~EOS
      [install]
      install-scripts=#{scripts_folder}
    EOS

    %w[setuptools pip].each do |pkg|
      resource(pkg).stage do
        system bin/"pypy3", "-s", "setup.py", "--no-user-cfg", "install", "--force", "--verbose"
      end
    end

    # Symlinks to easy_install_pypy3 and pip_pypy3
    bin.install_symlink scripts_folder/"easy_install" => "easy_install_pypy3"
    bin.install_symlink scripts_folder/"pip" => "pip_pypy3"

    # post_install happens after linking
    %w[easy_install_pypy3 pip_pypy3].each { |e| (HOMEBREW_PREFIX/"bin").install_symlink bin/e }
  end

  def caveats
    <<~EOS
      A "distutils.cfg" has been written to:
        #{distutils}
      specifying the install-scripts folder as:
        #{scripts_folder}

      If you install Python packages via "pypy3 setup.py install", easy_install_pypy3,
      or pip_pypy3, any provided scripts will go into the install-scripts folder
      above, so you may want to add it to your PATH *after* #{HOMEBREW_PREFIX}/bin
      so you don't overwrite tools from CPython.

      Setuptools and pip have been installed, so you can use easy_install_pypy3 and
      pip_pypy3.
      To update pip and setuptools between pypy3 releases, run:
          pip_pypy3 install --upgrade pip setuptools

      See: https://docs.brew.sh/Homebrew-and-Python
    EOS
  end

  # The HOMEBREW_PREFIX location of site-packages
  def prefix_site_packages
    HOMEBREW_PREFIX/"lib/pypy3/site-packages"
  end

  # Where setuptools will install executable scripts
  def scripts_folder
    HOMEBREW_PREFIX/"share/pypy3"
  end

  # The Cellar location of distutils
  def distutils
    libexec/"lib-python/3/distutils"
  end

  test do
    system bin/"pypy3", "-c", "print('Hello, world!')"
    system bin/"pypy3", "-c", "import time; time.clock()"
    system scripts_folder/"pip", "list"
  end
end