Mix Tasks: Add task uploads.ex for migrating local uploads.

lib/mix/tasks/pleroma/uploads.ex

+defmodule Mix.Tasks.Pleroma.Uploads do
+  use Mix.Task
+  import Mix.Ecto
+  alias Pleroma.{Upload, Uploaders.Local, Uploaders.S3}
+  alias Mix.Tasks.Pleroma.Common
+  require Logger
+
+  @log_every 50
+  @shortdoc "Migrate uploads from local to remote storage"
+  @longdioc """
+   Manages uploads
+   ## Migrate uploads from local to remote storage
+
+  """
+
+  def run(["migrate_local", target_uploader | args]) do
+    delete? = Enum.member?(args, "--delete")
+    Common.start_pleroma()
+    local_path = Pleroma.Config.get!([Local, :uploads])
+    uploader = Module.concat(Pleroma.Uploaders, target_uploader)
+
+    unless Code.ensure_loaded?(uploader) do
+      raise("The uploader #{inspect(uploader)} is not an existing/loaded module.")
+    end
+
+    target_enabled? = Pleroma.Config.get([Upload, :uploader]) == uploader
+
+    unless target_enabled? do
+      Pleroma.Config.put([Upload, :uploader], uploader)
+    end
+
+    Mix.shell().info("Migrating files from local #{local_path} to #{to_string(uploader)}")
+
+    if delete? do
+      Mix.shell().info(
+        "Attention: uploaded files will be deleted, hope you have backups! (--delete ; cancel with ^C)"
+      )
+
+      :timer.sleep(:timer.seconds(5))
+    end
+
+    uploads =
+      File.ls!(local_path)
+      |> Enum.map(fn id ->
+        root_path = Path.join(local_path, id)
+
+        cond do
+          File.dir?(root_path) ->
+            files = for file <- File.ls!(root_path), do: {id, file, Path.join([root_path, file])}
+
+            case List.first(files) do
+              {id, file, path} ->
+                {%Pleroma.Upload{id: id, name: file, path: id <> "/" <> file, tempfile: path},
+                 root_path}
+
+              _ ->
+                nil
+            end
+
+          File.exists?(root_path) ->
+            file = Path.basename(id)
+            [hash, ext] = String.split(id, ".")
+            {%Pleroma.Upload{id: hash, name: file, path: file, tempfile: root_path}, root_path}
+
+          true ->
+            nil
+        end
+      end)
+      |> Enum.filter(& &1)
+
+    total_count = length(uploads)
+    Mix.shell().info("Found #{total_count} uploads")
+
+    uploads
+    |> Task.async_stream(
+      fn {upload, root_path} ->
+        case Upload.store(upload, uploader: uploader, filters: [], size_limit: nil) do
+          {:ok, _} ->
+            if delete?, do: File.rm_rf!(root_path)
+            Logger.debug("uploaded: #{inspect(upload.path)} #{inspect(upload)}")
+            :ok
+
+          error ->
+            Mix.shell().error("failed to upload #{inspect(upload.path)}: #{inspect(error)}")
+        end
+      end,
+      timeout: 150_000
+    )
+    |> Stream.chunk_every(@log_every)
+    |> Enum.reduce(0, fn done, count ->
+      count = count + length(done)
+      Mix.shell().info("Uploaded #{count}/#{total_count} files")
+      count
+    end)
+
+    Mix.shell().info("Done!")
+  end
+end