128 lines
2.9 KiB
Elixir
128 lines
2.9 KiB
Elixir
defmodule FindOldMp3s.Application do
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@moduledoc """
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Main module to run when invoking the binary
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"""
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@dialyzer {:no_return, show_exiftool_error: 0, start: 2}
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def start(_, _) do
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check_exif_tools()
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get_options()
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|> validate_options()
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|> execute()
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System.halt(0)
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end
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defp check_exif_tools() do
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case System.find_executable("exiftool") do
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nil -> show_exiftool_error()
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_ -> true
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end
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end
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defp get_options() do
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Burrito.Util.Args.get_arguments()
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|> OptionParser.parse(
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strict: [path: :string, type: :keep, help: :boolean],
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aliases: [p: :path, t: :type, h: :help]
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)
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end
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defp validate_options({[], [], []}), do: {:error, :no_parameters}
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defp validate_options({parsed, _argv, _errors}) do
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cond do
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Keyword.has_key?(parsed, :help) ->
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{:error, :show_help}
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Keyword.has_key?(parsed, :path) and Keyword.has_key?(parsed, :type) ->
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{:ok, parsed}
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true ->
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{:error, :missing_parameter}
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end
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end
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defp execute({:error, :no_parameters}) do
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IO.warn("No options given!")
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print_help()
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System.halt(1)
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end
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defp execute({:error, :show_help}) do
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print_help()
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System.halt(1)
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end
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defp execute({:error, :missing_parameter}) do
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IO.warn("Both parameters 'type' and 'path' must be set!")
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print_help()
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System.halt(1)
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end
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defp execute({:ok, opts}) do
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file_types =
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Keyword.get_values(opts, :type)
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|> Enum.join(",")
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file_path =
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Keyword.get(opts, :path)
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|> Path.expand()
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files = Path.wildcard("#{file_path}/**/*.{#{file_types}}")
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if Enum.empty?(files) do
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IO.puts("No files found")
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System.halt(0)
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end
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IO.puts("Running exiftool...\n")
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Stream.map(files, fn file -> {get_bitrate(file), file} end)
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|> Enum.each(fn {bitrate, path} -> IO.puts("#{bitrate}\t|\t#{path}") end)
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end
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defp show_exiftool_error() do
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IO.puts(
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:stderr,
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"This command needs to have tool 'exiftool' installed! Please consult your OS manual in order to install it."
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)
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System.halt(2)
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end
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defp print_help() do
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IO.puts("""
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This command will find audio files with low bitrates in a folder folder (recursively) and shows the bitrate and
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path to those files.
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DESCRIPTION
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Possible options:
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Long option short option description
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--help -h Show this help
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--type -t Give some file audio file type ending like 'ogg' or 'mp3' - can be used multiple
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times
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--path -p Root path to search files, search will be recursive
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EXAMPLE
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find_old_mp3s --path "~" --type "ogg" --type "mp3"
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""")
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end
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defp get_bitrate(file) do
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System.cmd("exiftool", ["-AudioBitrate", file])
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|> elem(0)
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|> String.split(":")
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|> Enum.at(1, "---")
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|> String.trim()
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|> String.pad_trailing(8)
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end
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end
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