Remove auto-install of all deps except cupy

Dependencies are now handled by pyproject.toml / requirements.txt
via ComfyUI Manager or pip. Only cupy is auto-installed at load time
since it requires matching the PyTorch CUDA version; failures produce
a warning instead of crashing. Also added timm to requirements.txt.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.md

@@ -149,36 +149,33 @@ Same as GIMM-VFI Interpolate but processes a single segment. Same pattern as BIM
 
 ## Installation
 
-Clone into your ComfyUI `custom_nodes/` directory:
+Install from the [ComfyUI Registry](https://registry.comfy.org/) or clone into your ComfyUI `custom_nodes/` directory:
 
 ```bash
 cd ComfyUI/custom_nodes
 git clone https://github.com/Ethanfel/ComfyUI-Tween.git
+pip install -r requirements.txt
 ```
 
-Dependencies (`gdown`, `cupy`, `timm`, `omegaconf`, `easydict`, `yacs`, `einops`, `huggingface_hub`) are auto-installed on first load. The correct `cupy` variant is detected from your PyTorch CUDA version.
+### cupy
 
-> **Warning:** `cupy` is a large package (~800MB) and compilation/installation can take several minutes. The first ComfyUI startup after installing this node may appear to hang while `cupy` installs in the background. Check the console log for progress. If auto-install fails (e.g. missing build tools in Docker), install manually with:
-> ```bash
-> pip install cupy-cuda12x  # replace 12 with your CUDA major version
-> ```
-
-To install manually:
+`cupy` is required for BIM-VFI, SGM-VFI, and GIMM-VFI (optical flow warping). It will be auto-installed on first load based on your PyTorch CUDA version. If auto-install fails, install manually:
 
 ```bash
-cd ComfyUI-Tween
-python install.py
+pip install cupy-cuda12x  # replace 12 with your CUDA major version (11 or 12)
 ```
 
 ### Requirements
 
 - PyTorch with CUDA
-- `cupy` (matching your CUDA version, for BIM-VFI, SGM-VFI, and GIMM-VFI)
+- `cupy` (matching your CUDA version — for BIM-VFI, SGM-VFI, and GIMM-VFI)
 - `timm` (for EMA-VFI and SGM-VFI)
 - `gdown` (for BIM-VFI/EMA-VFI/SGM-VFI model auto-download)
 - `omegaconf`, `easydict`, `yacs`, `einops` (for GIMM-VFI)
 - `huggingface_hub` (for GIMM-VFI model auto-download)
 
+All dependencies except `cupy` are listed in `pyproject.toml` and installed automatically by ComfyUI Manager or pip.
+
 ## VRAM Guide
 
 | VRAM | Recommended settings |

__init__.py

@@ -5,45 +5,35 @@ import logging
 logger = logging.getLogger("Tween")
 
 
-def _auto_install_deps():
-    """Auto-install missing dependencies on first load."""
-    # gdown
-    try:
-        import gdown  # noqa: F401
-    except ImportError:
-        logger.info("[Tween] Installing gdown...")
-        subprocess.check_call([sys.executable, "-m", "pip", "install", "gdown"])
-
-    # timm (required for EMA-VFI's MotionFormer backbone)
-    try:
-        import timm  # noqa: F401
-    except ImportError:
-        logger.info("[Tween] Installing timm...")
-        subprocess.check_call([sys.executable, "-m", "pip", "install", "timm"])
-
-    # cupy
+def _ensure_cupy():
+    """Try to auto-install cupy if missing, matching the PyTorch CUDA version."""
     try:
         import cupy  # noqa: F401
+        return
     except ImportError:
+        pass
+
     try:
         import torch
+        if not torch.cuda.is_available() or not hasattr(torch.version, "cuda") or torch.version.cuda is None:
+            logger.warning(
+                "[Tween] CUDA not available — cupy cannot be installed. "
+                "SGM-VFI and GIMM-VFI require CUDA."
+            )
+            return
         major = int(torch.version.cuda.split(".")[0])
         cupy_pkg = f"cupy-cuda{major}x"
         logger.info(f"[Tween] Installing {cupy_pkg} (CUDA {torch.version.cuda})...")
         subprocess.check_call([sys.executable, "-m", "pip", "install", cupy_pkg])
     except Exception as e:
-            logger.warning(f"[Tween] Could not auto-install cupy: {e}")
-
-    # GIMM-VFI dependencies
-    for pkg in ("omegaconf", "yacs", "easydict", "einops", "huggingface_hub"):
-        try:
-            __import__(pkg)
-        except ImportError:
-            logger.info(f"[Tween] Installing {pkg}...")
-            subprocess.check_call([sys.executable, "-m", "pip", "install", pkg])
+        logger.warning(
+            f"[Tween] Could not auto-install cupy: {e}\n"
+            f"[Tween] SGM-VFI and GIMM-VFI will not work without cupy. Install manually:\n"
+            f"[Tween]   pip install cupy-cuda12x  # replace 12 with your CUDA major version"
+        )
 
 
-_auto_install_deps()
+_ensure_cupy()
 
 from .nodes import (
     LoadBIMVFIModel, BIMVFIInterpolate, BIMVFISegmentInterpolate, TweenConcatVideos,

requirements.txt

@@ -1,4 +1,5 @@
 gdown
+timm
 omegaconf
 yacs
 easydict