kiex homebrew formula

kiex.rb

class Kiex < Formula
  desc "Elixir version manager"
  homepage "https://taylor.github.io/kiex/"
  head "https://github.com/taylor/kiex.git"

  bottle :unneeded

  def install
    bin.install "kiex"
  end

  def post_install
    system "#{bin}/kiex", "install_kiex"
  end

  test do
    system "#{bin}/kiex", "list", "releases"
  end
end