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Python

# Substitute BackEnd - backend liaison services for SugarSubstitute and ComfyUI
# Copyright (C) 2026 Artificial Sweetener and contributors
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
"""ComfyUI extension entry point for Substitute BackEnd."""
from __future__ import annotations
import sys
from pathlib import Path
NODE_CLASS_MAPPINGS: dict[str, type[object]] = {}
NODE_DISPLAY_NAME_MAPPINGS: dict[str, str] = {}
WEB_DIRECTORY = "web"
_EXTENSION_ROOT = Path(__file__).resolve().parent
_EXTENSION_ROOT_TEXT = str(_EXTENSION_ROOT)
if _EXTENSION_ROOT_TEXT not in sys.path:
sys.path.insert(0, _EXTENSION_ROOT_TEXT)
def _register_with_comfy(extension_root: Path) -> None:
"""Register routes after ensuring the extension package is importable."""
from substitute_backend.host.extension import register_extension
register_extension(
PromptServer,
extension_root,
node_class_mappings=NODE_CLASS_MAPPINGS,
)
try: # pragma: no cover - ComfyUI host module is unavailable in unit tests.
from server import PromptServer
except (ImportError, ModuleNotFoundError): # pragma: no cover - same as above.
PromptServer = None
else:
_register_with_comfy(_EXTENSION_ROOT)
__all__ = [
"NODE_CLASS_MAPPINGS",
"NODE_DISPLAY_NAME_MAPPINGS",
"WEB_DIRECTORY",
]