class Pipenv < Formula
  include Language::Python::Virtualenv

  desc "Python dependency management tool"
  homepage "https://docs.pipenv.org/"
  url "https://files.pythonhosted.org/packages/7e/01/3faf5d7e80c8c0612667b12104ae205a5e33d502f84b6e8bfdc07a2eb9fa/pipenv-2018.5.18.tar.gz"
  sha256 "04b9a8b02a3ff12a5502b335850cfdb192adcfd1d6bbdb7a7c47cae9ab9ddece"
  revision 1

  bottle do
    cellar :any_skip_relocation
    sha256 "754edb4af932125d972b3c3985f1add42bd0d047994a595eea655f94dcdd3a3e" => :high_sierra
    sha256 "6176a05f07ef3e8e0a8250dc1c6521997ab5cf2683c64fd95de0ee5c4420f52e" => :sierra
    sha256 "23487df5efee4a2d9e4b02f81c6765f7bc491242c609a4066438d33f0a9b54ae" => :el_capitan
  end

  depends_on "python"

  resource "certifi" do
    url "https://files.pythonhosted.org/packages/4d/9c/46e950a6f4d6b4be571ddcae21e7bc846fcbb88f1de3eff0f6dd0a6be55d/certifi-2018.4.16.tar.gz"
    sha256 "13e698f54293db9f89122b0581843a782ad0934a4fe0172d2a980ba77fc61bb7"
  end

  resource "virtualenv" do
    url "https://files.pythonhosted.org/packages/33/bc/fa0b5347139cd9564f0d44ebd2b147ac97c36b2403943dbee8a25fd74012/virtualenv-16.0.0.tar.gz"
    sha256 "ca07b4c0b54e14a91af9f34d0919790b016923d157afda5efdde55c96718f752"
  end

  resource "virtualenv-clone" do
    url "https://files.pythonhosted.org/packages/14/2f/84b6a8e380439cdfdb71e0ced2a805a66e343ac540d3304bde6bc28fbb46/virtualenv-clone-0.3.0.tar.gz"
    sha256 "b5cfe535d14dc68dfc1d1bb4ac1209ea28235b91156e2bba8e250d291c3fb4f8"
  end

  def install
    # Using the virtualenv DSL here because the alternative of using
    # write_env_script to set a PYTHONPATH breaks things.
    # https://github.com/Homebrew/homebrew-core/pull/19060#issuecomment-338397417
    venv = virtualenv_create(libexec, "python3")
    venv.pip_install resources
    venv.pip_install buildpath

    # `pipenv` needs to be able to find `virtualenv` and `pewtwo` on PATH. So we
    # install symlinks for those scripts in `#{libexec}/tools` and create a
    # wrapper script for `pipenv` which adds `#{libexec}/tools` to PATH.
    (libexec/"tools").install_symlink libexec/"bin/pewtwo", libexec/"bin/pip",
                                      libexec/"bin/virtualenv"
    env = {
      :PATH => "#{libexec}/tools:$PATH",
    }
    (bin/"pipenv").write_env_script(libexec/"bin/pipenv", env)

    output = Utils.popen_read("#{libexec}/bin/pipenv --completion")
    (bash_completion/"pipenv").write output
  end

  # Avoid relative paths
  def post_install
    lib_python_path = Pathname.glob(libexec/"lib/python*").first
    lib_python_path.each_child do |f|
      next unless f.symlink?
      realpath = f.realpath
      rm f
      ln_s realpath, f
    end
    inreplace lib_python_path/"orig-prefix.txt",
              Formula["python"].opt_prefix, Formula["python"].prefix.realpath
  end

  test do
    ENV["LC_ALL"] = "en_US.UTF-8"
    assert_match "Commands", shell_output("#{bin}/pipenv")
    system "#{bin}/pipenv", "install", "requests"
    system "#{bin}/pipenv", "install", "boto3"
    assert_predicate testpath/"Pipfile", :exist?
    assert_predicate testpath/"Pipfile.lock", :exist?
    assert_match "requests", (testpath/"Pipfile").read
    assert_match "boto3", (testpath/"Pipfile").read
  end
end
