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earmark

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Earmark is a pure-Elixir Markdown converter. It is intended to be used as a library (just call Earmark.as_html), but can also be used as a command-line tool (run mix escript.build first). Output generation is pluggable.

Retired package: Deprecated - Earmark is no longer maintained. Migrate to a replacement, for example MDEx (https://hex.pm/packages/mdex).
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earmark lib earmark cli.ex
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lib/earmark/cli.ex 

defmodule Earmark.CLI do



  def main(argv) do

    argv 

    |> parse_args 

    |> process

  end



  @args """

  usage:



     earmark [ <file> ]



  convert file from Markdown to HTML.

  """



  defp parse_args(argv) do

    parse = OptionParser.parse(argv, switches: [ help: :boolean],

                                     aliases:  [ h:    :help   ])

    case  parse  do



    { [ help: true ],  _,  _ } -> :help

    { _, [ filename ], _     } -> open_file(filename)

    { _, [ ],          _ }     -> :stdio

    _                          -> :help

    end

  end





  defp process(:help) do

    IO.puts(:stderr, @args)

    exit(2)

  end



  defp process(io_device) do

    content = IO.stream(io_device, :line) |> Enum.to_list

    Earmark.to_html(content, %Earmark.Options{})

    |> IO.puts

  end







  defp open_file(filename), do: io_device(File.open(filename, [:utf8]), filename)



  defp io_device({:ok, io_device}, _), do: io_device

  defp io_device({:error, reason}, filename) do

    IO.puts(:stderr, "#{filename}: #{:file.format_error(reason)}")

    exit(1)

  end





end