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	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Web.MediaProxy.Invalidation.Script do
	@moduledoc false

	@behaviour Pleroma.Web.MediaProxy.Invalidation

	require Logger

	@impl Pleroma.Web.MediaProxy.Invalidation
	def purge(urls, opts \\ []) do
	args =
	urls
	\|> List.wrap()
	\|> Enum.uniq()
	\|> Enum.join(" ")

	opts
	\|> Keyword.get(:script_path)
	\|> do_purge([args])
	\|> handle_result(urls)
	end

	defp do_purge(script_path, args) when is_binary(script_path) do
	path = Path.expand(script_path)
	Logger.debug("Running cache purge: #{inspect(args)}, #{inspect(path)}")
	System.cmd(path, args)
	rescue
	error -> error
	end

	defp do_purge(_, _), do: {:error, "not found script path"}

	defp handle_result({_result, 0}, urls), do: {:ok, urls}
	defp handle_result({:error, error}, urls), do: handle_result(error, urls)

	defp handle_result(error, _) do
	Logger.error("Error while cache purge: #{inspect(error)}")
	{:error, inspect(error)}
	end
	end