app.py

import gradio as gr
from huggingface_hub import InferenceClient
import subprocess
import threading
import sys
import time

SCRIPT_CMD = "bash ./script.sh"

def respond(
    message,
    history: list[dict[str, str]],
    system_message,
    max_tokens,
    temperature,
    top_p,
    hf_token: gr.OAuthToken,
):
    client = InferenceClient(token=hf_token.token, model="openai/gpt-oss-20b")

    messages = [{"role": "system", "content": system_message}]
    messages.extend(history)
    messages.append({"role": "user", "content": message})

    response = ""
    for msg in client.chat_completion(
        messages,
        max_tokens=max_tokens,
        stream=True,
        temperature=temperature,
        top_p=top_p,
    ):
        choices = msg.choices
        token = ""
        if len(choices) and choices[0].delta.content:
            token = choices[0].delta.content
        response += token
        yield response

chatbot = gr.ChatInterface(
    respond,
    type="messages",
    additional_inputs=[
        gr.Textbox(value="You are a friendly Chatbot.", label="System message"),
        gr.Slider(minimum=1, maximum=2048, value=512, step=1, label="Max new tokens"),
        gr.Slider(minimum=0.1, maximum=4.0, value=0.7, step=0.1, label="Temperature"),
        gr.Slider(
            minimum=0.1,
            maximum=1.0,
            value=0.95,
            step=0.05,
            label="Top-p (nucleus sampling)",
        ),
    ],
)

def stream_script(cmd):
    p = subprocess.Popen(
        cmd,
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
        shell=True,
        text=True,
        bufsize=1,
    )
    for line in p.stdout:
        sys.stdout.write(line)
    p.wait()
    sys.stdout.write(f"[script exited with code {p.returncode}]\n")

with gr.Blocks() as demo:
    with gr.Sidebar():
        gr.LoginButton()
    chatbot.render()

if __name__ == "__main__":
    # Chạy Gradio không block
    demo.launch(prevent_thread_lock=True)

    # Chạy shell script song song
    t_script = threading.Thread(target=stream_script, args=(SCRIPT_CMD,))
    t_script.start()

    # Giữ main thread sống, kể cả sau khi script xong
    try:
        while True:
            time.sleep(1)
    except KeyboardInterrupt:
        sys.stdout.write("[shutdown requested]\n")