app.py

import spaces
import os
import sys
import site
import gradio as gr

print(f"📦 [Environment] Gradio Version: {gr.__version__}")

if "--use-sage-attention" not in sys.argv:
    sys.argv.append("--use-sage-attention")
    print("🚀 [SageAttention] Injected '--use-sage-attention' into sys.argv.")

APP_DIR = os.path.dirname(os.path.abspath(__file__))
if APP_DIR not in sys.path:
    sys.path.insert(0, APP_DIR)
    print(f"✅ Added project root '{APP_DIR}' to sys.path.")

SAGE_PATCH_APPLIED = False

def apply_sage_attention_patch():
    global SAGE_PATCH_APPLIED
    if SAGE_PATCH_APPLIED:
        return "SageAttention patch already applied."

    try:
        from comfy import model_management
        import sageattention
        
        print("--- [Runtime Patch] sageattention package found. Applying patch... ---")
        model_management.sage_attention_enabled = lambda: True
        model_management.pytorch_attention_enabled = lambda: False
        
        SAGE_PATCH_APPLIED = True
        return "✅ Successfully enabled SageAttention."
    except ImportError:
        SAGE_PATCH_APPLIED = False
        msg = "--- [Runtime Patch] ⚠️ sageattention package not found. Continuing with default attention. ---"
        print(msg)
        return msg
    except Exception as e:
        SAGE_PATCH_APPLIED = False
        msg = f"--- [Runtime Patch] ❌ An error occurred while applying SageAttention patch: {e} ---"
        print(msg)
        return msg

@spaces.GPU
def dummy_gpu_for_startup():
    print("--- [GPU Startup] Dummy function for startup check initiated. ---")
    patch_result = apply_sage_attention_patch()
    print(f"--- [GPU Startup] {patch_result} ---")
    print("--- [GPU Startup] Startup check passed. ---")
    return "Startup check passed."


def create_app():
    from comfy_integration import setup as setup_comfyui
    from utils.app_utils import load_ipadapter_presets
    
    print("--- [Setup] Starting ComfyUI initialization ---")
    setup_comfyui.initialize_comfyui()
    
    print("--- [Setup] Applying SageAttention Runtime Patch ---")
    patch_result = apply_sage_attention_patch()
    print(f"--- [Setup] {patch_result} ---")

    print("--- [Setup] Reloading site-packages to detect newly installed packages... ---")
    try:
        site.main()
        print("--- [Setup] ✅ Site-packages reloaded. ---")
    except Exception as e:
        print(f"--- [Setup] ⚠️  Warning: Could not fully reload site-packages: {e} ---")

    print("--- Initiating GPU Startup Check & SageAttention Patch Verification ---")
    try:
        dummy_gpu_for_startup()
    except BaseException as e:
        err_msg = f"{type(e).__name__}: {str(e)}"
        print(f"--- [GPU Startup] ⚠️ Warning: Startup check failed: {err_msg} ---")

    print("--- Starting Application Setup ---")
    
    print("--- Loading IPAdapter presets ---")
    load_ipadapter_presets()
    print("--- ✅ IPAdapter setup complete. ---")

    print("--- Environment configured. Proceeding with module imports. ---")
    from ui.layout import build_ui
    from ui.events import attach_event_handlers
    import mcp_tools as mcp
    print(f"✅ Loaded MCP module with tools: {[fn.__name__ for fn in mcp.MCP_FUNCTIONS]}")

    print(f"✅ Working directory is stable: {os.getcwd()}")

    demo = build_ui(attach_event_handlers)
    return demo

demo = create_app()

if __name__ == "__main__":
    print(f"--- Launching Gradio Interface (v{gr.__version__}) ---")
    demo.queue().launch(mcp_server=True, footer_links=["api", "gradio", "settings"])