1 files changed, 114 insertions, 20 deletions
diff --git a/lib/pleroma/application_requirements.ex b/lib/pleroma/application_requirements.ex
index 16f62b6f5..a56311a65 100644
--- a/lib/pleroma/application_requirements.ex
+++ b/lib/pleroma/application_requirements.ex
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.ApplicationRequirements do
@@ -9,6 +9,9 @@ defmodule Pleroma.ApplicationRequirements do
 
   defmodule VerifyError, do: defexception([:message])
 
+  alias Pleroma.Config
+  alias Pleroma.Helpers.MediaHelper
+
   import Ecto.Query
 
   require Logger
@@ -16,10 +19,12 @@ defmodule Pleroma.ApplicationRequirements do
   @spec verify!() :: :ok | VerifyError.t()
   def verify! do
     :ok
-    |> check_confirmation_accounts!
+    |> check_system_commands!()
+    |> check_confirmation_accounts!()
     |> check_migrations_applied!()
     |> check_welcome_message_config!()
     |> check_rum!()
+    |> check_repo_pool_size!()
     |> handle_result()
   end
 
@@ -29,15 +34,16 @@ defmodule Pleroma.ApplicationRequirements do
   defp check_welcome_message_config!(:ok) do
     if Pleroma.Config.get([:welcome, :email, :enabled], false) and
          not Pleroma.Emails.Mailer.enabled?() do
-      Logger.error("""
-      To send welcome email do you need to enable mail.
-      \nconfig :pleroma, Pleroma.Emails.Mailer, enabled: true
-      """)
+      Logger.warn("""
+      To send welcome emails, you need to enable the mailer.
+      Welcome emails will NOT be sent with the current config.
 
-      {:error, "The mail disabled."}
-    else
-      :ok
+      Enable the mailer:
+        config :pleroma, Pleroma.Emails.Mailer, enabled: true
+      """)
     end
+
+    :ok
   end
 
   defp check_welcome_message_config!(result), do: result
@@ -46,16 +52,21 @@ defmodule Pleroma.ApplicationRequirements do
   #
   def check_confirmation_accounts!(:ok) do
     if Pleroma.Config.get([:instance, :account_activation_required]) &&
-         not Pleroma.Config.get([Pleroma.Emails.Mailer, :enabled]) do
-      Logger.error(
-        "Account activation enabled, but no Mailer settings enabled.\nPlease set config :pleroma, :instance, account_activation_required: false\nOtherwise setup and enable Mailer."
-      )
+         not Pleroma.Emails.Mailer.enabled?() do
+      Logger.warn("""
+      Account activation is required, but the mailer is disabled.
+      Users will NOT be able to confirm their accounts with this config.
+      Either disable account activation or enable the mailer.
 
-      {:error,
-       "Account activation enabled, but Mailer is disabled. Cannot send confirmation emails."}
-    else
-      :ok
+      Disable account activation:
+        config :pleroma, :instance, account_activation_required: false
+
+      Enable the mailer:
+        config :pleroma, Pleroma.Emails.Mailer, enabled: true
+      """)
     end
+
+    :ok
   end
 
   def check_confirmation_accounts!(result), do: result
@@ -81,7 +92,9 @@ defmodule Pleroma.ApplicationRequirements do
               Enum.map(down_migrations, fn {:down, id, name} -> "- #{name} (#{id})\n" end)
 
             Logger.error(
-              "The following migrations were not applied:\n#{down_migrations_text}If you want to start Pleroma anyway, set\nconfig :pleroma, :i_am_aware_this_may_cause_data_loss, disable_migration_check: true"
+              "The following migrations were not applied:\n#{down_migrations_text}" <>
+                "If you want to start Pleroma anyway, set\n" <>
+                "config :pleroma, :i_am_aware_this_may_cause_data_loss, disable_migration_check: true"
             )
 
             {:error, "Unapplied Migrations detected"}
@@ -124,14 +137,22 @@ defmodule Pleroma.ApplicationRequirements do
     case {setting, migrate} do
       {true, false} ->
         Logger.error(
-          "Use `RUM` index is enabled, but were not applied migrations for it.\nIf you want to start Pleroma anyway, set\nconfig :pleroma, :database, rum_enabled: false\nOtherwise apply the following migrations:\n`mix ecto.migrate --migrations-path priv/repo/optional_migrations/rum_indexing/`"
+          "Use `RUM` index is enabled, but were not applied migrations for it.\n" <>
+            "If you want to start Pleroma anyway, set\n" <>
+            "config :pleroma, :database, rum_enabled: false\n" <>
+            "Otherwise apply the following migrations:\n" <>
+            "`mix ecto.migrate --migrations-path priv/repo/optional_migrations/rum_indexing/`"
         )
 
         {:error, "Unapplied RUM Migrations detected"}
 
       {false, true} ->
         Logger.error(
-          "Detected applied migrations to use `RUM` index, but `RUM` isn't enable in settings.\nIf you want to use `RUM`, set\nconfig :pleroma, :database, rum_enabled: true\nOtherwise roll `RUM` migrations back.\n`mix ecto.rollback --migrations-path priv/repo/optional_migrations/rum_indexing/`"
+          "Detected applied migrations to use `RUM` index, but `RUM` isn't enable in settings.\n" <>
+            "If you want to use `RUM`, set\n" <>
+            "config :pleroma, :database, rum_enabled: true\n" <>
+            "Otherwise roll `RUM` migrations back.\n" <>
+            "`mix ecto.rollback --migrations-path priv/repo/optional_migrations/rum_indexing/`"
         )
 
         {:error, "RUM Migrations detected"}
@@ -140,4 +161,77 @@ defmodule Pleroma.ApplicationRequirements do
         :ok
     end
   end
+
+  defp check_system_commands!(:ok) do
+    filter_commands_statuses = [
+      check_filter(Pleroma.Upload.Filter.Exiftool, "exiftool"),
+      check_filter(Pleroma.Upload.Filter.Mogrify, "mogrify"),
+      check_filter(Pleroma.Upload.Filter.Mogrifun, "mogrify"),
+      check_filter(Pleroma.Upload.Filter.AnalyzeMetadata, "mogrify"),
+      check_filter(Pleroma.Upload.Filter.AnalyzeMetadata, "convert"),
+      check_filter(Pleroma.Upload.Filter.AnalyzeMetadata, "ffprobe")
+    ]
+
+    preview_proxy_commands_status =
+      if !Config.get([:media_preview_proxy, :enabled]) or
+           MediaHelper.missing_dependencies() == [] do
+        true
+      else
+        Logger.error(
+          "The following dependencies required by Media preview proxy " <>
+            "(which is currently enabled) are not installed: " <>
+            inspect(MediaHelper.missing_dependencies())
+        )
+
+        false
+      end
+
+    if Enum.all?([preview_proxy_commands_status | filter_commands_statuses], & &1) do
+      :ok
+    else
+      {:error,
+       "System commands missing. Check logs and see `docs/installation` for more details."}
+    end
+  end
+
+  defp check_system_commands!(result), do: result
+
+  defp check_repo_pool_size!(:ok) do
+    if Pleroma.Config.get([Pleroma.Repo, :pool_size], 10) != 10 and
+         not Pleroma.Config.get([:dangerzone, :override_repo_pool_size], false) do
+      Logger.error("""
+      !!!CONFIG WARNING!!!
+
+      The database pool size has been altered from the recommended value of 10.
+
+      Please revert or ensure your database is tuned appropriately and then set
+      `config :pleroma, :dangerzone, override_repo_pool_size: true`.
+
+      If you are experiencing database timeouts, please check the "Optimizing
+      your PostgreSQL performance" section in the documentation. If you still
+      encounter issues after that, please open an issue on the tracker.
+      """)
+
+      {:error, "Repo.pool_size different than recommended value."}
+    else
+      :ok
+    end
+  end
+
+  defp check_repo_pool_size!(result), do: result
+
+  defp check_filter(filter, command_required) do
+    filters = Config.get([Pleroma.Upload, :filters])
+
+    if filter in filters and not Pleroma.Utils.command_available?(command_required) do
+      Logger.error(
+        "#{filter} is specified in list of Pleroma.Upload filters, but the " <>
+          "#{command_required} command is not found"
+      )
+
+      false
+    else
+      true
+    end
+  end
 end