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lightning_css

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A wrapper for the Lightning CSS tool.

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lightning_css lib lightning_css versions.ex
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lib/lightning_css/versions.ex 

defmodule LightningCSS.Versions do

  @moduledoc """

  This module groups functions to read default and remote versions of Lightning CSS.

  """



  # Package: https://registry.npmjs.org/lightningcss-cli/latest

  # Website: https://www.npmjs.com/package/lightningcss-cli

  @latest_version "1.22.0"



  @doc """

  Returns the version of the lightning_css executable.



  Returns `{:ok, version_string}` on success or `:error` when the executable

  is not available.

  """

  def bin do

    path = LightningCSS.Paths.bin()

    version_path = path |> Path.dirname() |> Path.join("version")



    with true <- File.exists?(version_path),

         {:ok, result} <- File.read(version_path) do

      {:ok, String.trim(result)}

    else

      _ -> :error

    end

  end



  @doc """

  Returns the version of Lightning CSS that this package should use.

  """

  @spec configured() :: String.t() | nil

  def configured do

    Application.get_env(:lightning_css, :version)

  end



  @doc """

  Returns the configured version falling back to the latest if there's no version configured.

  """

  @spec to_use() :: String.t()

  def to_use do

    configured() || latest()

  end



  @doc """

  Returns the most recent Lightning CSS version known by this package.

  """

  @spec latest() :: String.t()

  def latest do

    @latest_version

  end

end