Dockerfile

# LTX Director Image-to-Video — ComfyUI on a Hugging Face Docker Space
# GPU target: L40S / A100 (48GB). LTX-2.3 needs 32GB+ VRAM and 100GB+ disk.
FROM nvidia/cuda:12.4.1-cudnn-runtime-ubuntu22.04

ENV DEBIAN_FRONTEND=noninteractive \
    PIP_NO_CACHE_DIR=1 \
    PYTHONUNBUFFERED=1 \
    HF_HUB_ENABLE_HF_TRANSFER=1

# System dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
        git wget curl ca-certificates ffmpeg \
        python3.11 python3.11-venv python3.11-dev python3-pip \
        build-essential \
    && rm -rf /var/lib/apt/lists/* \
    && ln -sf /usr/bin/python3.11 /usr/bin/python \
    && ln -sf /usr/bin/python3.11 /usr/bin/python3

# HF Spaces convention: run as non-root user with UID 1000
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH
WORKDIR /home/user/app

# Python tooling
RUN python -m pip install --user --upgrade pip

# PyTorch (CUDA 12.4 build)
RUN pip install --user torch torchvision torchaudio \
        --index-url https://download.pytorch.org/whl/cu124

# ComfyUI core
RUN git clone --depth 1 https://github.com/comfyanonymous/ComfyUI.git ComfyUI
WORKDIR /home/user/app/ComfyUI
RUN pip install --user -r requirements.txt
RUN pip install --user huggingface_hub hf_transfer

# Custom nodes: LTXVideo extension + WhatDreamsCost LTX Director
WORKDIR /home/user/app/ComfyUI/custom_nodes
RUN git clone --depth 1 https://github.com/Lightricks/ComfyUI-LTXVideo.git \
    && if [ -f ComfyUI-LTXVideo/requirements.txt ]; then \
         pip install --user -r ComfyUI-LTXVideo/requirements.txt; fi
RUN git clone --depth 1 https://github.com/WhatDreamsCost/WhatDreamsCost-ComfyUI.git \
    && if [ -f WhatDreamsCost-ComfyUI/requirements.txt ]; then \
         pip install --user -r WhatDreamsCost-ComfyUI/requirements.txt; fi

# Preload the LTX Director image-to-video workflow into the user workflows dir
# so it shows up in the ComfyUI "Open workflow" menu.
WORKDIR /home/user/app/ComfyUI
RUN mkdir -p user/default/workflows \
    && cp custom_nodes/ComfyUI-LTXVideo/example_workflows/2.0/LTX-2_I2V_Distilled_wLora.json \
          user/default/workflows/ltx_director_i2v.json 2>/dev/null || true

# Entrypoint: download weights on boot, then launch ComfyUI on port 7860
COPY --chown=user:user start.sh /home/user/app/start.sh
USER root
RUN chmod +x /home/user/app/start.sh
USER user

EXPOSE 7860
ENTRYPOINT ["/home/user/app/start.sh"]