dbprune: add more logs

Pruning can go on for a long time; give admins some insight into that
something is happening to make it less frustrating and to make it easier
which part of the process is stalled should this happen.

Again most of the changes are merely reindents;
review with whitespace changes hidden recommended.

lib/mix/tasks/pleroma/database.ex

@@ -68,6 +68,8 @@ defmodule Mix.Tasks.Pleroma.Database do
       """
       |> Repo.query([], timeout: :infinity)
 
+    Logger.info("Prune activity singles: deleted #{del_single} rows...")
+
     # Prune activities who link to an array of objects
     {:ok, %{:num_rows => del_array}} =
       """
@@ -88,6 +90,8 @@ defmodule Mix.Tasks.Pleroma.Database do
       """
       |> Repo.query([], timeout: :infinity)
 
+    Logger.info("Prune activity arrays: deleted #{del_array} rows...")
+
     del_single + del_array
   end
 
@@ -222,6 +226,7 @@ defmodule Mix.Tasks.Pleroma.Database do
 
     Logger.info(log_message)
 
+    {del_obj, _} =
       if Keyword.get(options, :keep_threads) do
         # We want to delete objects from threads where
         # 1. the newest post is still old
@@ -288,9 +293,12 @@ defmodule Mix.Tasks.Pleroma.Database do
       end
       |> Repo.delete_all(timeout: :infinity)
 
+    Logger.info("Deleted #{del_obj} objects...")
+
     if !Keyword.get(options, :keep_threads) do
       # Without the --keep-threads option, it's possible that bookmarked
       # objects have been deleted. We remove the corresponding bookmarks.
+      {:ok, %{:num_rows => del_bookmarks}} =
         """
         delete from public.bookmarks
         where id in (
@@ -301,12 +309,16 @@ defmodule Mix.Tasks.Pleroma.Database do
         )
         """
         |> Repo.query([], timeout: :infinity)
+
+      Logger.info("Deleted #{del_bookmarks} orphaned bookmarks...")
     end
 
     if Keyword.get(options, :prune_orphaned_activities) do
-      prune_orphaned_activities()
+      del_activities = prune_orphaned_activities()
+      Logger.info("Deleted #{del_activities} orphaned activities...")
     end
 
+    {:ok, %{:num_rows => del_hashtags}} =
       """
       DELETE FROM hashtags AS ht
       WHERE NOT EXISTS (
@@ -315,9 +327,14 @@ defmodule Mix.Tasks.Pleroma.Database do
       """
       |> Repo.query()
 
+    Logger.info("Deleted #{del_hashtags} no longer used hashtags...")
+
     if Keyword.get(options, :vacuum) do
+      Logger.info("Starting vacuum...")
       Maintenance.vacuum("full")
     end
+
+    Logger.info("All done!")
   end
 
   def run(["prune_task"]) do