[#3031] Refactoring: moved system commands checks to ApplicationRequirements.

lib/pleroma/application.ex

@@ -56,7 +56,6 @@ def start(_type, _args) do
     Pleroma.ApplicationRequirements.verify!()
     setup_instrumenters()
     load_custom_modules()
-    check_system_commands()
     Pleroma.Docs.JSON.compile()
 
     adapter = Application.get_env(:tesla, :adapter)
@@ -260,37 +259,4 @@ defp http_children(Tesla.Adapter.Gun, _) do
   end
 
   defp http_children(_, _), do: []
-
-  defp check_system_commands do
-    filters = Config.get([Pleroma.Upload, :filters])
-
-    check_filter = fn filter, command_required ->
-      with true <- filter in filters,
-           false <- 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"
-        )
-      end
-    end
-
-    check_filter.(Pleroma.Upload.Filters.Exiftool, "exiftool")
-    check_filter.(Pleroma.Upload.Filters.Mogrify, "mogrify")
-    check_filter.(Pleroma.Upload.Filters.Mogrifun, "mogrify")
-
-    with true <- Config.get([:media_preview_proxy, :enabled]),
-         missing_graphics_tools = Pleroma.Helpers.MediaHelper.missing_dependencies(),
-         [] <- missing_graphics_tools do
-      :noop
-    else
-      false ->
-        :noop
-
-      missing_graphics_tools ->
-        Logger.error(
-          "The following dependencies required by Media preview proxy " <>
-            "(which is currently enabled) are not installed: #{inspect(missing_graphics_tools)}"
-        )
-    end
-  end
 end

lib/pleroma/application_requirements.ex

@@ -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
@@ -16,7 +19,8 @@ defmodule VerifyError, do: defexception([:message])
   @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!()
@@ -48,7 +52,9 @@ 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."
+        "Account activation enabled, but no Mailer settings enabled.\n" <>
+          "Please set config :pleroma, :instance, account_activation_required: false\n" <>
+          "Otherwise setup and enable Mailer."
       )
 
       {:error,
@@ -81,7 +87,9 @@ def check_migrations_applied!(:ok) 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 +132,22 @@ defp do_check_rum!(setting, migrate) 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 +156,50 @@ defp do_check_rum!(setting, migrate) do
         :ok
     end
   end
+
+  defp check_system_commands!(:ok) do
+    filter_commands_statuses = [
+      check_filter(Pleroma.Upload.Filters.Exiftool, "exiftool"),
+      check_filter(Pleroma.Upload.Filters.Mogrify, "mogrify"),
+      check_filter(Pleroma.Upload.Filters.Mogrifun, "mogrify")
+    ]
+
+    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_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