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rewrite

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An API for rewriting sources in an Elixir project. Powered by sourceror.

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rewrite lib rewrite source_error.ex
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lib/rewrite/source_error.ex 

defmodule Rewrite.SourceError do

  @moduledoc """

  An exception for when a function can not handle a source.

  """



  alias Rewrite.SourceError



  @type reason :: :nopath | :changed | File.posix()

  @type action :: :rm

  @type path :: nil | Path.t()



  @type t :: %SourceError{reason: reason, action: action, path: path}



  @enforce_keys [:reason, :action]

  defexception [:reason, :path, :action]



  @impl true

  def exception(value) do

    struct!(SourceError, value)

  end



  @impl true

  def message(%SourceError{reason: :nopath, action: action}) do

    "could not #{format(action)}: no path found"

  end



  def message(%SourceError{reason: :changed, action: action, path: path}) do

    "could not #{format(action)} #{inspect(path)}: file changed since reading"

  end



  def message(%SourceError{reason: posix, action: action, path: path}) do

    """

    could not #{format(action)} #{inspect(path)}\

    : #{IO.iodata_to_binary(:file.format_error(posix))}\

    """

  end



  def format(action) do

    case action do

      :rm -> "remove file"

      :write -> "write to file"

    end

  end

end