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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Utils do
   6   def compile_dir(dir) when is_binary(dir) do
   7     dir
   8     |> File.ls!()
   9     |> Enum.map(&Path.join(dir, &1))
  10     |> Kernel.ParallelCompiler.compile()
  11   end
  12
  13   @doc """
  14   POSIX-compliant check if command is available in the system
  15
  16   ## Examples
  17       iex> command_available?("git")
  18       true
  19       iex> command_available?("wrongcmd")
  20       false
  21
  22   """
  23   @spec command_available?(String.t()) :: boolean()
  24   def command_available?(command) do
  25     match?({_output, 0}, System.cmd("sh", ["-c", "command -v #{command}"]))
  26   end
  27
  28   @doc "creates the uniq temporary directory"
  29   @spec tmp_dir(String.t()) :: {:ok, String.t()} | {:error, :file.posix()}
  30   def tmp_dir(prefix \\ "") do
  31     sub_dir =
  32       [
  33         prefix,
  34         Timex.to_unix(Timex.now()),
  35         :os.getpid(),
  36         String.downcase(Integer.to_string(:rand.uniform(0x100000000), 36))
  37       ]
  38       |> Enum.join("-")
  39
  40     tmp_dir = Path.join(System.tmp_dir!(), sub_dir)
  41
  42     case File.mkdir(tmp_dir) do
  43       :ok -> {:ok, tmp_dir}
  44       error -> error
  45     end
  46   end
  47 end