fix loads config variable with large value from db

lib/mix/tasks/pleroma/config.ex

@@ -52,7 +52,9 @@ def run(["migrate_from_db", env, delete?]) do
       |> Enum.each(fn config ->
         IO.write(
           file,
-          "config :#{config.group}, #{config.key}, #{inspect(Config.from_binary(config.value))}\r\n\r\n"
+          "config :#{config.group}, #{config.key}, #{
+            inspect(Config.from_binary(config.value), limit: :infinity)
+          }\r\n\r\n"
         )
 
         if delete? do

test/tasks/config_test.exs

@@ -63,4 +63,84 @@ test "settings are migrated to file and deleted from db", %{temp_file: temp_file
     assert file =~ "config :pleroma, :setting_first,"
     assert file =~ "config :pleroma, :setting_second,"
   end
+
+  test "load a settings with large values and pass to file", %{temp_file: temp_file} do
+    Config.create(%{
+      group: "pleroma",
+      key: ":instance",
+      value: [
+        name: "Pleroma",
+        email: "example@example.com",
+        notify_email: "noreply@example.com",
+        description: "A Pleroma instance, an alternative fediverse server",
+        limit: 5_000,
+        chat_limit: 5_000,
+        remote_limit: 100_000,
+        upload_limit: 16_000_000,
+        avatar_upload_limit: 2_000_000,
+        background_upload_limit: 4_000_000,
+        banner_upload_limit: 4_000_000,
+        poll_limits: %{
+          max_options: 20,
+          max_option_chars: 200,
+          min_expiration: 0,
+          max_expiration: 365 * 24 * 60 * 60
+        },
+        registrations_open: true,
+        federating: true,
+        federation_incoming_replies_max_depth: 100,
+        federation_reachability_timeout_days: 7,
+        federation_publisher_modules: [Pleroma.Web.ActivityPub.Publisher],
+        allow_relay: true,
+        rewrite_policy: Pleroma.Web.ActivityPub.MRF.NoOpPolicy,
+        public: true,
+        quarantined_instances: [],
+        managed_config: true,
+        static_dir: "instance/static/",
+        allowed_post_formats: ["text/plain", "text/html", "text/markdown", "text/bbcode"],
+        mrf_transparency: true,
+        mrf_transparency_exclusions: [],
+        autofollowed_nicknames: [],
+        max_pinned_statuses: 1,
+        no_attachment_links: true,
+        welcome_user_nickname: nil,
+        welcome_message: nil,
+        max_report_comment_size: 1000,
+        safe_dm_mentions: false,
+        healthcheck: false,
+        remote_post_retention_days: 90,
+        skip_thread_containment: true,
+        limit_to_local_content: :unauthenticated,
+        dynamic_configuration: false,
+        user_bio_length: 5000,
+        user_name_length: 100,
+        max_account_fields: 10,
+        max_remote_account_fields: 20,
+        account_field_name_length: 512,
+        account_field_value_length: 2048,
+        external_user_synchronization: true,
+        extended_nickname_format: true,
+        multi_factor_authentication: [
+          totp: [
+            # digits 6 or 8
+            digits: 6,
+            period: 30
+          ],
+          backup_codes: [
+            number: 2,
+            length: 6
+          ]
+        ]
+      ]
+    })
+
+    Mix.Tasks.Pleroma.Config.run(["migrate_from_db", "temp", "true"])
+
+    assert Repo.all(Config) == []
+    assert File.exists?(temp_file)
+    {:ok, file} = File.read(temp_file)
+
+    assert file ==
+             "use Mix.Config\n\nconfig :pleroma, :instance,\n  name: \"Pleroma\",\n  email: \"example@example.com\",\n  notify_email: \"noreply@example.com\",\n  description: \"A Pleroma instance, an alternative fediverse server\",\n  limit: 5000,\n  chat_limit: 5000,\n  remote_limit: 100_000,\n  upload_limit: 16_000_000,\n  avatar_upload_limit: 2_000_000,\n  background_upload_limit: 4_000_000,\n  banner_upload_limit: 4_000_000,\n  poll_limits: %{\n    max_expiration: 31_536_000,\n    max_option_chars: 200,\n    max_options: 20,\n    min_expiration: 0\n  },\n  registrations_open: true,\n  federating: true,\n  federation_incoming_replies_max_depth: 100,\n  federation_reachability_timeout_days: 7,\n  federation_publisher_modules: [Pleroma.Web.ActivityPub.Publisher],\n  allow_relay: true,\n  rewrite_policy: Pleroma.Web.ActivityPub.MRF.NoOpPolicy,\n  public: true,\n  quarantined_instances: [],\n  managed_config: true,\n  static_dir: \"instance/static/\",\n  allowed_post_formats: [\"text/plain\", \"text/html\", \"text/markdown\", \"text/bbcode\"],\n  mrf_transparency: true,\n  mrf_transparency_exclusions: [],\n  autofollowed_nicknames: [],\n  max_pinned_statuses: 1,\n  no_attachment_links: true,\n  welcome_user_nickname: nil,\n  welcome_message: nil,\n  max_report_comment_size: 1000,\n  safe_dm_mentions: false,\n  healthcheck: false,\n  remote_post_retention_days: 90,\n  skip_thread_containment: true,\n  limit_to_local_content: :unauthenticated,\n  dynamic_configuration: false,\n  user_bio_length: 5000,\n  user_name_length: 100,\n  max_account_fields: 10,\n  max_remote_account_fields: 20,\n  account_field_name_length: 512,\n  account_field_value_length: 2048,\n  external_user_synchronization: true,\n  extended_nickname_format: true,\n  multi_factor_authentication: [\n    totp: [digits: 6, period: 30],\n    backup_codes: [number: 2, length: 6]\n  ]\n"
+  end
 end