class Cython < Formula
  desc "Compiler for writing C extensions for the Python language"
  homepage "http://cython.org"
  url "https://files.pythonhosted.org/packages/21/89/ca320e5b45d381ae0df74c4b5694f1471c1b2453c5eb4bac3449f5970481/Cython-0.28.5.tar.gz"
  sha256 "b64575241f64f6ec005a4d4137339fb0ba5e156e826db2fdb5f458060d9979e0"

  bottle do
    cellar :any_skip_relocation
    sha256 "134941134203c6f04e03773914b0b76aa477d921c88fab61b4321f18c1125837" => :mojave
    sha256 "ebf8c846b0f0819ef9e2534b8279134c4fc9d0767cf570c80e4017217b2fc33c" => :high_sierra
    sha256 "15ab83414328ba268480c21a20fc93e5dfb4807e59189f56932f7c1893ad39e8" => :sierra
    sha256 "099c77dc98a2406c1c30742e50f36622e622c63fa93de496b61ece7ad35eccd7" => :el_capitan
  end

  keg_only <<~EOS
    this formula is mainly used internally by other formulae.
    Users are advised to use `pip` to install cython
  EOS

  depends_on "python@2"

  def install
    ENV.prepend_create_path "PYTHONPATH", libexec/"lib/python2.7/site-packages"
    system "python", *Language::Python.setup_install_args(libexec)

    bin.install Dir[libexec/"bin/*"]
    bin.env_script_all_files(libexec/"bin", :PYTHONPATH => ENV["PYTHONPATH"])
  end

  test do
    ENV.prepend_path "PYTHONPATH", libexec/"lib/python2.7/site-packages"

    phrase = "You are using Homebrew"
    (testpath/"package_manager.pyx").write "print '#{phrase}'"
    (testpath/"setup.py").write <<~EOS
      from distutils.core import setup
      from Cython.Build import cythonize

      setup(
        ext_modules = cythonize("package_manager.pyx")
      )
    EOS
    system "python", "setup.py", "build_ext", "--inplace"
    assert_match phrase, shell_output("python -c 'import package_manager'")
  end
end