agent/tools/code_interpreter.py

import asyncio
import atexit
import base64
import glob
import io
import json
import os
import queue
import re
import shutil
import signal
import subprocess
import sys
import time
import uuid
from pathlib import Path
from typing import Dict, Optional

import matplotlib
import PIL.Image
from jupyter_client import BlockingKernelClient

sys.path.insert(0, str(Path(__file__).absolute().parent.parent.parent))  # NOQA

from agent.log import logger  # NOQA
from agent.utils.utils import extract_code, print_traceback  # NOQA

WORK_DIR = os.getenv('M6_CODE_INTERPRETER_WORK_DIR', '/tmp/m6_ci_workspace')

STATIC_URL = os.getenv('M6_CODE_INTERPRETER_STATIC_URL',
                       'http://127.0.0.1:7866/static')

LAUNCH_KERNEL_PY = """
from ipykernel import kernelapp as app
app.launch_new_instance()
"""

INIT_CODE_FILE = str(
    Path(__file__).absolute().parent / 'resource' /
    'code_interpreter_init_kernel.py')

ALIB_FONT_FILE = str(
    Path(__file__).absolute().parent / 'resource' /
    'AlibabaPuHuiTi-3-45-Light.ttf')

_KERNEL_CLIENTS: Dict[int, BlockingKernelClient] = {}


def _start_kernel(pid) -> BlockingKernelClient:
    connection_file = os.path.join(WORK_DIR,
                                   f'kernel_connection_file_{pid}.json')
    launch_kernel_script = os.path.join(WORK_DIR, f'launch_kernel_{pid}.py')
    for f in [connection_file, launch_kernel_script]:
        if os.path.exists(f):
            logger.info(f'WARNING: {f} already exists')
            os.remove(f)

    os.makedirs(WORK_DIR, exist_ok=True)

    with open(launch_kernel_script, 'w') as fout:
        fout.write(LAUNCH_KERNEL_PY)

    kernel_process = subprocess.Popen([
        sys.executable,
        launch_kernel_script,
        '--IPKernelApp.connection_file',
        connection_file,
        '--matplotlib=inline',
        '--quiet',
    ],
                                      cwd=WORK_DIR)
    logger.info(f"INFO: kernel process's PID = {kernel_process.pid}")

    # Wait for kernel connection file to be written
    while True:
        if not os.path.isfile(connection_file):
            time.sleep(0.1)
        else:
            # Keep looping if JSON parsing fails, file may be partially written
            try:
                with open(connection_file, 'r') as fp:
                    json.load(fp)
                break
            except json.JSONDecodeError:
                pass

    # Client
    kc = BlockingKernelClient(connection_file=connection_file)
    asyncio.set_event_loop_policy(asyncio.DefaultEventLoopPolicy())
    kc.load_connection_file()
    kc.start_channels()
    kc.wait_for_ready()
    return kc


def _kill_kernels():
    for v in _KERNEL_CLIENTS.values():
        v.shutdown()
    for k in list(_KERNEL_CLIENTS.keys()):
        del _KERNEL_CLIENTS[k]


atexit.register(_kill_kernels)
signal.signal(signal.SIGTERM, _kill_kernels)
signal.signal(signal.SIGINT, _kill_kernels)


def _serve_image(image_base64: str) -> str:
    image_file = f'{uuid.uuid4()}.png'
    local_image_file = os.path.join(WORK_DIR, image_file)

    png_bytes = base64.b64decode(image_base64)
    assert isinstance(png_bytes, bytes)
    bytes_io = io.BytesIO(png_bytes)
    PIL.Image.open(bytes_io).save(local_image_file, 'png')

    image_url = f'{STATIC_URL}/{image_file}'
    return image_url


def _escape_ansi(line: str) -> str:
    ansi_escape = re.compile(r'(?:\x1B[@-_]|[\x80-\x9F])[0-?]*[ -/]*[@-~]')
    return ansi_escape.sub('', line)


def _execute_code(kc: BlockingKernelClient, code: str) -> str:
    kc.wait_for_ready()
    kc.execute(code)
    result = ''
    image_idx = 0
    while True:
        text = ''
        image = ''
        finished = False
        msg_type = 'error'
        try:
            msg = kc.get_iopub_msg()
            msg_type = msg['msg_type']
            if msg_type == 'status':
                if msg['content'].get('execution_state') == 'idle':
                    finished = True
            elif msg_type == 'execute_result':
                text = msg['content']['data'].get('text/plain', '')
                if 'image/png' in msg['content']['data']:
                    image_b64 = msg['content']['data']['image/png']
                    image_url = _serve_image(image_b64)
                    image_idx += 1
                    image = '![fig-%03d](%s)' % (image_idx, image_url)
            elif msg_type == 'display_data':
                if 'image/png' in msg['content']['data']:
                    image_b64 = msg['content']['data']['image/png']
                    image_url = _serve_image(image_b64)
                    image_idx += 1
                    image = '![fig-%03d](%s)' % (image_idx, image_url)
                else:
                    text = msg['content']['data'].get('text/plain', '')
            elif msg_type == 'stream':
                msg_type = msg['content']['name']  # stdout, stderr
                text = msg['content']['text']
            elif msg_type == 'error':
                text = _escape_ansi('\n'.join(msg['content']['traceback']))
                if 'M6_CODE_INTERPRETER_TIMEOUT' in text:
                    text = 'Timeout: Code execution exceeded the time limit.'
        except queue.Empty:
            text = 'Timeout: Code execution exceeded the time limit.'
            finished = True
        except Exception:
            text = 'The code interpreter encountered an unexpected error.'
            print_traceback()
            finished = True
        if text:
            result += f'\n\n{msg_type}:\n\n```\n{text}\n```'
        if image:
            result += f'\n\n{image}'
        if finished:
            break
    result = result.lstrip('\n')
    return result


def _fix_matplotlib_cjk_font_issue():
    ttf_name = os.path.basename(ALIB_FONT_FILE)
    local_ttf = os.path.join(
        os.path.abspath(
            os.path.join(matplotlib.matplotlib_fname(), os.path.pardir)),
        'fonts', 'ttf', ttf_name)
    if not os.path.exists(local_ttf):
        try:
            shutil.copy(ALIB_FONT_FILE, local_ttf)
            font_list_cache = os.path.join(matplotlib.get_cachedir(),
                                           'fontlist-*.json')
            for cache_file in glob.glob(font_list_cache):
                with open(cache_file) as fin:
                    cache_content = fin.read()
                if ttf_name not in cache_content:
                    os.remove(cache_file)
        except Exception:
            print_traceback()


def code_interpreter(action_input: str, timeout: Optional[int] = 30) -> str:
    code = extract_code(action_input)

    if not code.strip():
        return ''

    pid: int = os.getpid()
    if pid in _KERNEL_CLIENTS:
        kc = _KERNEL_CLIENTS[pid]
    else:
        _fix_matplotlib_cjk_font_issue()
        kc = _start_kernel(pid)
        with open(INIT_CODE_FILE) as fin:
            start_code = fin.read()
            start_code = start_code.replace('{{M6_FONT_PATH}}',
                                            repr(ALIB_FONT_FILE)[1:-1])
        logger.info(_execute_code(kc, start_code))
        _KERNEL_CLIENTS[pid] = kc

    if timeout:
        code = f'_M6CountdownTimer.start({timeout})\n{code}'

    fixed_code = []
    for line in code.split('\n'):
        fixed_code.append(line)
        if line.startswith('sns.set_theme('):
            fixed_code.append(
                'plt.rcParams["font.family"] = _m6_font_prop.get_name()')
    fixed_code = '\n'.join(fixed_code)
    result = _execute_code(kc, fixed_code)

    if timeout:
        _execute_code(kc, '_M6CountdownTimer.cancel()')

    return result


def _get_multiline_input(hint: str) -> str:
    logger.info(
        '// Press ENTER to make a new line. Press CTRL-D to end input.')
    lines = []
    while True:
        try:
            line = input()
        except EOFError:  # CTRL-D
            break
        lines.append(line)
    logger.info('// Input received.')
    if lines:
        return '\n'.join(lines)
    else:
        return ''


if __name__ == '__main__':
    while True:
        logger.info(
            code_interpreter(_get_multiline_input('Enter python code:')))