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moar

1.35.0
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A dependency-free utility library containing 100+ useful functions.

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moar lib file.ex
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lib/file.ex 

defmodule Moar.File do

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



  @moduledoc "File-related functions."



  @doc """

  Returns a randomly-named path in the system temp directory. Does not actually create the file at the path.



  For example, `Moar.File.new_tempfile_path(".txt")` would return something like

  `"/var/folders/3r/n09zyyy16yddj9m2d1ppzvt40000gn/T/XY7V5E26DV.txt"`.



  ```elixir

  iex> Moar.File.new_tempfile_path(".txt") |> File.exists?()

  false

  ```

  """

  @spec new_tempfile_path(file_extension :: binary()) :: binary()

  def new_tempfile_path(file_extension),

    do: System.tmp_dir!() |> Path.join(Moar.Random.string(10, :base32) <> file_extension)



  @doc """

  Writes `contents` to a new temp file with extension `file_extension`, and returns the path to the file.



  For example, `Moar.File.write_tempfile("hello", ".txt")` would create a file in a path something like

  `/var/folders/3r/n09zyyy16yddj9m2d1ppzvt40000gn/T/RHUEJCCH22.txt` with the contents `hello`.



  ```elixir

  iex> Moar.File.write_tempfile("hello", ".txt") |> File.read!()

  "hello"

  ```

  """

  @spec write_tempfile(contents :: iodata(), file_extension :: binary()) :: binary()

  def write_tempfile(contents, file_extension),

    do: file_extension |> new_tempfile_path() |> tap(&File.write!(&1, contents, [:append]))

end