IEX clipboard helper

.iex.exs

defmodule KEx do
  @moduledoc "custom IEx extensions"

  @doc """
  Send data to `pbcopy`, a macOS utility that reads STDIN into the clipboard.
  """
  def pbcopy(data) do
    port = Port.open({:spawn, "/usr/bin/pbcopy"}, [:binary])
    send(port, {self(), {:command, data}})
    send(port, {self(), :close})

    receive do
      {^port, :closed} -> :ok
      other -> {:error, other}
    end
  end
end