fix: isolate controller settings side effects

main/main.gd

@@ -773,7 +773,6 @@ func _initialize_application(dedicated: bool) -> void:
 	_ui_pixelation.setup_controller_mapping(_controller_mapping_manager)
 	_game_ui.setup_keyboard_mouse_mapping(_keyboard_mouse_mapping_manager)
 	_data_root.conflict_detected.connect(_on_portable_conflict)
-	_data_root.status_changed.connect(_on_data_root_status)
 	if (
 		PortableFileGuard.has_syncthing_conflict(
 			_data_root.root_path.path_join("player")
@@ -1103,11 +1102,7 @@ func _on_portable_conflict(message: String, _path: String) -> void:
 	dialog.dialog_text = (
 		message
 		+ "\n\nDo not play the same profile on two devices at the same time."
-	)
-	dialog.add_button("Open Data Folder", false, "open")
-	dialog.custom_action.connect(func(action: StringName) -> void:
-		if action == &"open":
-			_data_root.open_folder()
+		+ "\n\nThe data folder can be opened from Settings > Data."
 	)
 	dialog.confirmed.connect(dialog.queue_free)
 	_game_ui.add_child(dialog)
@@ -1121,11 +1116,8 @@ func _on_data_root_status(message: String) -> void:
 	var dialog: AcceptDialog = AcceptDialog.new()
 	_interface_fonts.apply_utility_theme(dialog)
 	dialog.title = "Synced data needs review"
-	dialog.dialog_text = message
-	dialog.add_button("Open Data Folder", false, "open")
-	dialog.custom_action.connect(func(action: StringName) -> void:
-		if action == &"open":
-			_data_root.open_folder()
+	dialog.dialog_text = (
+		message + "\n\nThe data folder can be opened from Settings > Data."
 	)
 	dialog.confirmed.connect(dialog.queue_free)
 	_game_ui.add_child(dialog)

network/player_data_root.gd

@@ -211,10 +211,6 @@ func storage_mode_text() -> String:
 	}.get(mode, "Unavailable")
 
 
-func open_folder() -> bool:
-	return not root_path.is_empty() and OS.shell_open(root_path) == OK
-
-
 func report_conflict(message: String, conflict_path: String) -> void:
 	error_message = message
 	conflict_detected.emit(message, conflict_path)

scripts/run_validations.sh

@@ -8,6 +8,8 @@ readonly GODOT_BIN="${GODOT_BIN:-godot}"
 readonly TEST_TIMEOUT_SECONDS="${TEST_TIMEOUT_SECONDS:-120}"
 readonly RUN_ROOT="$(mktemp -d -t netfishing-validations.XXXXXX)"
 
+export NETFISHING_ISOLATED_VALIDATION_STORAGE=1
+
 readonly -a QUICK_TESTS=(
 	"scripts/validate_animalese_samples.gd"
 	"tests/android_readiness_validation.gd"

settings/player_settings_manager.gd

@@ -6,6 +6,9 @@ const SETTINGS_PATH: String = "user://player_settings.json"
 const TEMP_PATH: String = "user://player_settings.json.tmp"
 const BACKUP_PATH: String = "user://player_settings.json.backup"
 const SILENT_VOLUME_DB: float = -80.0
+const HEADLESS_WRITE_ENVIRONMENT: String = (
+	"NETFISHING_ISOLATED_VALIDATION_STORAGE"
+)
 
 signal settings_changed(settings: PlayerSettings)
 
@@ -197,6 +200,15 @@ func save_chat_preferences() -> bool:
 
 
 func save_now() -> bool:
+	if (
+		OS.has_feature("editor")
+		and DisplayServer.get_name() == "headless"
+		and not OS.has_environment(HEADLESS_WRITE_ENVIRONMENT)
+	):
+		push_error(
+			"Refusing to write player settings from an unisolated headless editor run."
+		)
+		return false
 	if current_settings == null or not current_settings.is_valid():
 		return false
 	var data: Dictionary = {

tests/controller_menu_accessibility_validation.gd

@@ -210,6 +210,25 @@ func _validate_join_game_navigation() -> void:
 
 
 func _validate_data_settings_navigation() -> void:
+	var main_source: String = FileAccess.get_file_as_string("res://main/main.gd")
+	var data_root_source: String = FileAccess.get_file_as_string(
+		"res://network/player_data_root.gd"
+	)
+	var settings_source: String = FileAccess.get_file_as_string(
+		"res://ui/settings_panel.gd"
+	)
+	_expect(
+		not main_source.contains("OS.shell_open")
+		and not main_source.contains(
+			"status_changed.connect(_on_data_root_status)"
+		)
+		and not data_root_source.contains("OS.shell_open")
+		and settings_source.count("OS.shell_open") == 1,
+		(
+			"Opening the data folder is not owned exclusively by the Settings "
+			+ "Data action."
+		),
+	)
 	var panel := SettingsPanelScene.instantiate() as SettingsPanel
 	root.add_child(panel)
 	await process_frame

ui/settings_panel.gd

@@ -623,7 +623,10 @@ func _open_data_folder() -> void:
 	if _data_root == null:
 		_feedback.text = "the data folder is unavailable."
 		return
-	if not _data_root.open_folder():
+	if (
+		_data_root.root_path.is_empty()
+		or OS.shell_open(_data_root.root_path) != OK
+	):
 		_feedback.text = "could not open the data folder."