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93 lines
2.2 KiB
Elixir
93 lines
2.2 KiB
Elixir
defmodule Asciinema.PngGenerator.A2png do
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@behaviour Asciinema.PngGenerator
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use GenServer
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alias Asciinema.Asciicasts.Asciicast
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alias Asciinema.PngGenerator.PngParams
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@pool_name :worker
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@acquire_timeout 5000
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@a2png_timeout 30_000
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@result_timeout 35_000
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def generate(%Asciicast{} = asciicast, %PngParams{} = png_params) do
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{:ok, tmp_dir_path} = Briefly.create(directory: true)
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try do
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:poolboy.transaction(
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@pool_name,
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(fn pid ->
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try do
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GenServer.call(pid, {:generate, asciicast, png_params, tmp_dir_path}, @result_timeout)
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catch
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:exit, {:timeout, _} ->
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{:error, :timeout}
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end
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end),
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@acquire_timeout
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)
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catch
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:exit, {:timeout, _} ->
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{:error, :busy}
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end
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end
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# GenServer API
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def start_link(_) do
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GenServer.start_link(__MODULE__, nil, [])
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end
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def init(_) do
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{:ok, nil}
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end
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def handle_call({:generate, asciicast, png_params, tmp_dir_path}, _from, state) do
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{:reply, do_generate(asciicast, png_params, tmp_dir_path), state}
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end
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def poolboy_config do
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[{:name, {:local, @pool_name}},
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{:worker_module, __MODULE__},
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{:size, pool_size()},
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{:max_overflow, 0}]
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end
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defp do_generate(asciicast, png_params, tmp_dir_path) do
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path = Asciicast.json_store_path(asciicast)
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json_path = Path.join(tmp_dir_path, "tmp.json")
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png_path = Path.join(tmp_dir_path, "tmp.png")
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args = [
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json_path,
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png_path,
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Float.to_string(png_params.snapshot_at),
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png_params.theme,
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Integer.to_string(png_params.scale)
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]
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:ok = file_store().download_file(path, json_path)
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process = Porcelain.spawn(bin_path(), args, err: :string)
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case Porcelain.Process.await(process, @a2png_timeout) do
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{:ok, %{status: 0}} ->
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{:ok, png_path}
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{:ok, %Porcelain.Result{} = result} ->
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{:error, result}
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otherwise ->
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otherwise
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end
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end
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defp bin_path do
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Keyword.get(Application.get_env(:asciinema, __MODULE__), :bin_path)
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end
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defp pool_size do
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Keyword.get(Application.get_env(:asciinema, __MODULE__), :pool_size)
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end
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defp file_store do
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Application.get_env(:asciinema, :file_store)
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end
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end
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