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

  desc "Python dependency management tool"
  homepage "https://docs.pipenv.org/"
  url "https://files.pythonhosted.org/packages/b6/8b/46fe3cb9f69491f2975ac987ea8f2f35d0dde8d1b83b6c57a5ed3bf7d873/pipenv-2018.11.14.tar.gz"
  sha256 "5f760d35de14982353437442d0d2c474bee139ffd69c01148abc11509f6422da"

  bottle do
    cellar :any_skip_relocation
    sha256 "9481525f03bbcc0973be651111d6500714dee3bd838ca8e99014e979cb02327a" => :mojave
    sha256 "8b029014130e8a5108fe9cf6f2615838ab9dc2c284c75cfad62f2aaf8f6ade8c" => :high_sierra
    sha256 "f996854aab13db998538c16fd0715ed9a4b1be325e7c3f19fbfd33804eb966ea" => :sierra
  end

  depends_on "python"

  resource "certifi" do
    url "https://files.pythonhosted.org/packages/41/b6/4f0cefba47656583217acd6cd797bc2db1fede0d53090fdc28ad2c8e0716/certifi-2018.10.15.tar.gz"
    sha256 "6d58c986d22b038c8c0df30d639f23a3e6d172a05c3583e766f4c0b785c0986a"
  end

  resource "virtualenv" do
    url "https://files.pythonhosted.org/packages/4e/8b/75469c270ac544265f0020aa7c4ea925c5284b23e445cf3aa8b99f662690/virtualenv-16.1.0.tar.gz"
    sha256 "f899fafcd92e1150f40c8215328be38ff24b519cd95357fa6e78e006c7638208"
  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