Add initial implementation for Stable Diffusion A1111 web UI in CPU mode

app.py

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+import os
+import subprocess
+import gradio as gr
+
+# Clone A1111 Web UI only if not already cloned
+if not os.path.exists("stable-diffusion-webui"):
+    subprocess.run(
+        ["git", "clone", "https://github.com/AUTOMATIC1111/stable-diffusion-webui.git"],
+        check=True,
+    )
+
+os.chdir("stable-diffusion-webui")
+
+# Install necessary dependencies
+subprocess.run(["pip", "install", "-r", "requirements.txt"], check=True)
+
+# Ensure CPU mode is enabled
+os.environ["CUDA_VISIBLE_DEVICES"] = "-1"
+
+# Download a smaller SD model to fit CPU constraints (e.g., SD 1.5 EMA-only)
+MODEL_PATH = "models/Stable-diffusion/sd-v1-5-ema.ckpt"
+MODEL_NAME = "sd-v1-5-ema.ckpt"
+MODEL_API = "https://civitai.com/api/download/models/11745?type=Model&format=SafeTensor&size=full&fp=fp16"
+if not os.path.exists(MODEL_PATH):
+    os.makedirs("models/Stable-diffusion", exist_ok=True)
+    subprocess.run(
+        ["wget", "-O", MODEL_PATH, MODEL_API],
+        check=True,
+    )
+
+
+# Launch web UI with CPU mode
+def launch_webui():
+    os.system(
+        "python webui.py --listen --share --no-half --precision full --disable-nan-check --use-cpu all --skip-torch-cuda-test"
+    )
+
+
+# Create a simple Gradio interface
+def start():
+    return (
+        "Stable Diffusion A1111 (CPU Mode) is running! Click the link to open the UI."
+    )
+
+
+interface = gr.Interface(fn=start, inputs=[], outputs="text")
+interface.launch()

space.yaml

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+sdk: gradio
+app_file: app.py
+python_version: 3.10
+accelerator: cpu