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An Elixir mix task that list the license(s) of all installed packages in your project.

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licensir lib mix tasks licenses.ex
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lib/mix/tasks/licenses.ex 

defmodule Mix.Tasks.Licenses do

  @moduledoc """

  Lists the licenses defined by each dependecy.



  ## Arguments

      mix licenses      # Prints a list containing the licenses defined in each dependency

  """

  use Mix.Task



  @shortdoc "Lists each dependency's licenses"

  @recursive true



  @name_width 24



  def run(_argv) do

    Licensir.Scanner.scan()

    |> Enum.sort_by(fn(license) -> license.name end)

    |> print_licenses()

  end



  defp print_licenses(licenses) do

    Enum.each(licenses, fn(license) ->

      license.name <> " " <> (license.version || "")

      |> String.pad_trailing(@name_width)

      |> Kernel.<>("-> " <> license.license)

      |> IO.puts()

    end)

  end

end