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moar

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A dependency-free utility library containing 100+ useful functions.

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moar lib version.ex
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lib/version.ex 

defmodule Moar.Version do

  # @related [test](/test/version_test.exs)



  @moduledoc "Version-related functions."



  @doc """

  Like `Version.compare/2` but first normalizes versions via `normalize/1`.



  ```

  iex> Elixir.Version.compare("1.2", "1.2.3")

  ** (Version.InvalidVersionError) invalid version: "1.2"



  iex> Moar.Version.compare("1.2", "1.2.3")

  :lt

  ```

  """

  @spec compare(binary(), binary()) :: :gt | :eq | :lt

  def compare(left, right),

    do: Version.compare(normalize(left), normalize(right))



  @doc """

  Adds major, minor, and patch versions if needed to create a string with major, minor, and patch numbers.

  Does not support versions that have anything other than numbers (like `1.2.3-beta4`).



  ```

  iex> Moar.Version.normalize("1.2")

  "1.2.0"

  ```

  """

  @spec normalize(binary()) :: binary()

  def normalize(version) do

    parts = version |> Moar.Term.presence("0.0.0") |> String.split(".") |> Enum.take(3)

    normalized = parts ++ List.duplicate("0", 3 - length(parts))

    Enum.join(normalized, ".")

  end

end