Merge branch 'exile' into 'develop'

Replace custom fifo implementation with Exile

See merge request pleroma/pleroma!4039

lib/pleroma/helpers/media_helper.ex

@@ -43,89 +43,28 @@ defmodule Pleroma.Helpers.MediaHelper do
   def video_framegrab(url) do
     with executable when is_binary(executable) <- System.find_executable("ffmpeg"),
          {:ok, env} <- HTTP.get(url, [], pool: :media),
-         {:ok, fifo_path} <- mkfifo(),
-         args = [
-           "-y",
-           "-i",
-           fifo_path,
-           "-vframes",
-           "1",
-           "-f",
-           "mjpeg",
-           "-loglevel",
-           "error",
-           "-"
-         ] do
-      run_fifo(fifo_path, env, executable, args)
+         {:ok, pid} <- StringIO.open(env.body) do
+      body_stream = IO.binstream(pid, 1)
+
+      Exile.stream!(
+        [
+          executable,
+          "-i",
+          "pipe:0",
+          "-vframes",
+          "1",
+          "-f",
+          "mjpeg",
+          "pipe:1"
+        ],
+        input: body_stream,
+        ignore_epipe: true,
+        stderr: :disable
+      )
+      |> Enum.into(<<>>)
     else
       nil -> {:error, {:ffmpeg, :command_not_found}}
       {:error, _} = error -> error
     end
   end
-
-  defp run_fifo(fifo_path, env, executable, args) do
-    pid =
-      Port.open({:spawn_executable, executable}, [
-        :use_stdio,
-        :stream,
-        :exit_status,
-        :binary,
-        args: args
-      ])
-
-    fifo = Port.open(to_charlist(fifo_path), [:eof, :binary, :stream, :out])
-    fix = Pleroma.Helpers.QtFastStart.fix(env.body)
-    true = Port.command(fifo, fix)
-    :erlang.port_close(fifo)
-    loop_recv(pid)
-  after
-    File.rm(fifo_path)
-  end
-
-  defp mkfifo do
-    path = Path.join(System.tmp_dir!(), "pleroma-media-preview-pipe-#{Ecto.UUID.generate()}")
-
-    case System.cmd("mkfifo", [path]) do
-      {_, 0} ->
-        spawn(fifo_guard(path))
-        {:ok, path}
-
-      {_, err} ->
-        {:error, {:fifo_failed, err}}
-    end
-  end
-
-  defp fifo_guard(path) do
-    pid = self()
-
-    fn ->
-      ref = Process.monitor(pid)
-
-      receive do
-        {:DOWN, ^ref, :process, ^pid, _} ->
-          File.rm(path)
-      end
-    end
-  end
-
-  defp loop_recv(pid) do
-    loop_recv(pid, <<>>)
-  end
-
-  defp loop_recv(pid, acc) do
-    receive do
-      {^pid, {:data, data}} ->
-        loop_recv(pid, acc <> data)
-
-      {^pid, {:exit_status, 0}} ->
-        {:ok, acc}
-
-      {^pid, {:exit_status, status}} ->
-        {:error, status}
-    after
-      5000 ->
-        :erlang.port_close(pid)
-        {:error, :timeout}
-    end
-  end
 end

mix.exs

@@ -184,6 +184,7 @@ defmodule Pleroma.Mixfile do
       {:vix, "~> 0.26.0"},
       {:elixir_make, "~> 0.7.7", override: true},
       {:blurhash, "~> 0.1.0", hex: :rinpatch_blurhash},
+      {:exile, "~> 0.8.0"},
 
       ## dev & test
       {:ex_doc, "~> 0.22", only: :dev, runtime: false},

mix.lock

@@ -46,6 +46,7 @@
   "ex_doc": {:hex, :ex_doc, "0.29.4", "6257ecbb20c7396b1fe5accd55b7b0d23f44b6aa18017b415cb4c2b91d997729", [:mix], [{:earmark_parser, "~> 1.4.31", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "2c6699a737ae46cb61e4ed012af931b57b699643b24dabe2400a8168414bc4f5"},
   "ex_machina": {:hex, :ex_machina, "2.7.0", "b792cc3127fd0680fecdb6299235b4727a4944a09ff0fa904cc639272cd92dc7", [:mix], [{:ecto, "~> 2.2 or ~> 3.0", [hex: :ecto, repo: "hexpm", optional: true]}, {:ecto_sql, "~> 3.0", [hex: :ecto_sql, repo: "hexpm", optional: true]}], "hexpm", "419aa7a39bde11894c87a615c4ecaa52d8f107bbdd81d810465186f783245bf8"},
   "ex_syslogger": {:hex, :ex_syslogger, "1.5.2", "72b6aa2d47a236e999171f2e1ec18698740f40af0bd02c8c650bf5f1fd1bac79", [:mix], [{:poison, ">= 1.5.0", [hex: :poison, repo: "hexpm", optional: true]}, {:syslog, "~> 1.1.0", [hex: :syslog, repo: "hexpm", optional: false]}], "hexpm", "ab9fab4136dbc62651ec6f16fa4842f10cf02ab4433fa3d0976c01be99398399"},
+  "exile": {:hex, :exile, "0.8.0", "7287f76add343c5dcf5e5b46066ebb93b02b7e643cce7a1a1c5eab3e7d9eb5d8", [:make, :mix], [{:elixir_make, "~> 0.6", [hex: :elixir_make, repo: "hexpm", optional: false]}], "hexpm", "63309c36590f3a524f513255601404e6672be4c8bea0cc4420fbae02e7ffffac"},
   "expo": {:hex, :expo, "0.4.1", "1c61d18a5df197dfda38861673d392e642649a9cef7694d2f97a587b2cfb319b", [:mix], [], "hexpm", "2ff7ba7a798c8c543c12550fa0e2cbc81b95d4974c65855d8d15ba7b37a1ce47"},
   "fast_html": {:hex, :fast_html, "2.0.5", "c61760340606c1077ff1f196f17834056cb1dd3d5cb92a9f2cabf28bc6221c3c", [:make, :mix], [{:elixir_make, "~> 0.4", [hex: :elixir_make, repo: "hexpm", optional: false]}, {:nimble_pool, "~> 0.2.0", [hex: :nimble_pool, repo: "hexpm", optional: false]}], "hexpm", "605f4f4829443c14127694ebabb681778712ceecb4470ec32aa31012330e6506"},
   "fast_sanitize": {:hex, :fast_sanitize, "0.2.3", "67b93dfb34e302bef49fec3aaab74951e0f0602fd9fa99085987af05bd91c7a5", [:mix], [{:fast_html, "~> 2.0", [hex: :fast_html, repo: "hexpm", optional: false]}, {:plug, "~> 1.8", [hex: :plug, repo: "hexpm", optional: false]}], "hexpm", "e8ad286d10d0386e15d67d0ee125245ebcfbc7d7290b08712ba9013c8c5e56e2"},