Delete unused assets in Unreal Engine
This Python-script is used to remove unused assets from the Unreal Engine project.
# This is a sample Python script.
# Press Shift+F10 to execute it or replace it with your code.
# Press Double Shift to search everywhere for classes, files, tool windows, actions, and settings.
import os
import sys
import unreal as ue
DIRECTORY = '/Game/StarterContent/'
editor = ue.EditorAssetLibrary()
def get_unused_assets(directory):
unused_assets = []
is_continue = True
while is_continue:
is_continue = False
assets = editor.list_assets(directory)
if len(assets) > 0:
with ue.ScopedSlowTask(len(assets), 'Begin...') as slow_task:
slow_task.make_dialog(True)
for asset in assets:
dependencies = editor.find_package_referencers_for_asset(asset)
if (len(dependencies) == 0 or all_in_array(unused_assets, dependencies) or
asset_equal_dependencies(asset, dependencies)) and asset not in unused_assets:
is_continue = True
unused_assets.append(asset)
if slow_task.should_cancel(): # True if the user has pressed Cancel in the UI
return
slow_task.enter_progress_frame(1)
return unused_assets
def all_in_array(array, need):
for n in need:
n = n + '.' + os.path.basename(n)
if n not in array:
return False
return True
def asset_equal_dependencies(asset, dependencies):
return asset == dependencies[0] + '.' + os.path.basename(dependencies[0])
def delete(deletes, is_delete=False):
if not is_delete:
ue.log('The argument "delete" is required to delete')
with ue.ScopedSlowTask(len(deletes), 'Delete...') as slow_task:
for asset in deletes:
ue.log('DELETE: ' + asset)
if is_delete:
editor.delete_asset(asset)
if slow_task.should_cancel():
return
slow_task.enter_progress_frame(1, asset)
def delete_empty_folders(directory):
registry = ue.AssetRegistryHelpers().get_asset_registry()
directories = registry.get_sub_paths(directory, True)
print(directories)
for directory in directories:
if editor.does_directory_exist(directory) and not registry.has_assets(directory):
ue.log('DELETE DIRECTORY: ' + directory)
editor.delete_directory(directory)
# Press the green button in the gutter to run the script.
if __name__ == '__main__':
delete_assets = get_unused_assets(DIRECTORY)
if len(sys.argv) > 1:
arg = sys.argv[1]
if arg == 'delete':
delete(delete_assets, True)
delete_empty_folders(DIRECTORY)
else:
delete(delete_assets)
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