launcher/launcher.py

import io
import json
import mimetypes
import os
import subprocess
import threading
import time
from pathlib import Path
from shutil import rmtree
from subprocess import CREATE_NO_WINDOW, Popen

import chardet
import py7zr
import requests
import webview
from py7zr.callbacks import ExtractCallback

from launcher import config
from launcher.sys_config import sys_config
from log import logger

mimetypes.add_type("text/html", ".html")
mimetypes.add_type("text/css", ".css")
mimetypes.add_type("application/javascript", ".js")

version = "v0.3"

get_new_version_url = (
    "https://git.zhaozuohong.vip/api/v1/repos/mower-ng/launcher/releases/latest"
)

download_git_url = "https://list.zhaozuohong.vip/mower-ng/git.7z"
download_python_url = "https://list.zhaozuohong.vip/mower-ng/python.7z"

upgrade_script_name = "upgrade.bat"


def custom_event(data):
    logger.info(data)
    data = json.dumps({"log": data + "\n"})
    js = f"var event = new CustomEvent('log', {{detail: {data}}}); window.dispatchEvent(event);"
    window.evaluate_js(js)


def format_size(size_bytes):
    """格式化文件大小为人类可读的形式"""
    for unit in ['B', 'KB', 'MB', 'GB', 'TB']:
        if size_bytes < 1024:
            return f"{size_bytes:.2f} {unit}"
        size_bytes /= 1024
    return f"{size_bytes:.2f} PB"


def download_file(download_name, download_url, destination_folder):
    """
    下载文件到指定文件夹
    :param download_name: 下载内容名
    :param download_url: 文件的下载 URL
    :param destination_folder: 保存下载文件的目标文件夹
    :return: 下载是否成功
    """
    if not os.path.exists(destination_folder):
        os.makedirs(destination_folder)

    filename = os.path.basename(download_url)
    download_path = os.path.join(destination_folder, filename)
    custom_event(f"开始下载: {download_name}")

    response = requests.get(download_url, stream=True)
    if response.status_code == 200:
        total_size = int(response.headers.get('content-length', 0))
        downloaded_size = 0
        start_time = time.time()
        last_update_time = time.time()  # 记录上次更新时间
        block_size = 4096  # 每次读取的数据块大小

        with open(download_path, "wb") as file:
            for data in response.iter_content(chunk_size=block_size):
                file.write(data)
                downloaded_size += len(data)
                current_time = time.time()
                elapsed_time = current_time - start_time

                if elapsed_time > 0:
                    download_speed = downloaded_size / elapsed_time  # 字节/秒
                else:
                    download_speed = 0

                progress_percent = (downloaded_size / total_size) * 100 if total_size != 0 else 0

                # 检查是否需要更新进度信息，每1秒更新一次
                if current_time - last_update_time >= 1:
                    # 格式化输出
                    formatted_downloaded_size = format_size(downloaded_size)
                    formatted_total_size = format_size(total_size)
                    formatted_speed = format_size(download_speed) + "/s"

                    custom_event(
                        f"下载进度: {progress_percent:.2f}% ({formatted_downloaded_size}/{formatted_total_size}), 下载速度: {formatted_speed}")
                    last_update_time = current_time  # 更新上次更新时间

        end_time = time.time()
        total_elapsed_time = end_time - start_time
        average_download_speed = downloaded_size / total_elapsed_time if total_elapsed_time != 0 else 0
        # 格式化输出
        formatted_total_elapsed_time = f"{total_elapsed_time:.2f} 秒"
        formatted_average_download_speed = format_size(average_download_speed) + "/s"

        custom_event(
            f"下载完成: {filename}, 耗时: {formatted_total_elapsed_time}, 下载速度: {formatted_average_download_speed}")
    else:
        logger.error(f"下载失败: {response.status_code}")
        return False

    return True


class MyExtractCallback(ExtractCallback):
    def __init__(self):
        super().__init__()
        self.total_size = 0
        self.last_print_time = time.time()

    def report_start(self, archive_name, archive_format):
        pass

    def report_start_preparation(self):
        pass

    def report_end(self, processing_file_path, wrote_bytes):
        self.total_size += int(wrote_bytes)
        current_time = time.time()
        if current_time - self.last_print_time >= 1.0:  # 至少每隔1秒输出一次
            custom_event(f"已解压: {format_size(self.total_size)}")
            self.last_print_time = current_time

    def report_postprocess(self):
        pass

    def report_update(self, message):
        pass

    def report_warning(self, message):
        pass


def extract_7z_file(file_name, file_path, destination_folder, delete_after_extract=True):
    """
    解压7z文件到指定文件夹
    :param file_name: 7z文件的名称
    :param file_path: 7z文件的路径
    :param destination_folder: 解压目标文件夹
    :param delete_after_extract: 解压后删除压缩文件，默认删除
    :return: 解压是否成功
    """
    if not os.path.exists(destination_folder):
        os.makedirs(destination_folder)

    custom_event(f"开始解压文件: {file_name}")
    try:
        start_time = time.time()
        with py7zr.SevenZipFile(file_path, mode='r') as z:
            callback = MyExtractCallback()
            z.extractall(path=destination_folder, callback=callback)
        end_time = time.time()
        total_elapsed_time = end_time - start_time
        formatted_total_elapsed_time = f"{total_elapsed_time:.2f} 秒"
        custom_event(
            f"解压完成: {file_name}, 总大小: {format_size(callback.total_size)}, 耗时: {formatted_total_elapsed_time}")
    except Exception as e:
        e.print_exc()
        custom_event(f"解压失败: {str(e)}")
        return False

    if delete_after_extract:
        try:
            os.remove(file_path)
            custom_event(f"删除{file_path}成功")
        except OSError as e:
            custom_event(f"删除{file_path}失败: {str(e)}")

    return True


def init_download(download_name, download_url, destination_folder):
    """
    初始化中的下载任务，返回一个函数，用于执行下载任务
    :param download_name: 下载任务的名称，用于在日志中记录
    :param download_url: 下载文件的 URL
    :param destination_folder: 下载文件的目标文件夹
    :return: 一个函数，用于执行下载任务
    """

    def download():
        target_folder = os.path.join(download_name)
        if os.path.exists(target_folder):
            custom_event(f"{download_name} 文件夹已存在，跳过下载")
            return True

        filename = os.path.basename(download_url)
        if not download_file(filename, download_url, destination_folder):
            return False
        download_path = os.path.join(destination_folder, filename)

        if not extract_7z_file(filename, download_path, destination_folder, True):
            return False

        return True

    return download


mirror_list = {
    "pypi": "https://pypi.org/simple",
    "aliyun": "https://mirrors.aliyun.com/pypi/simple/",
    "tuna": "https://mirrors.tuna.tsinghua.edu.cn/pypi/web/simple",
    "sjtu": "https://mirror.sjtu.edu.cn/pypi/web/simple",
}

command_list = {
    "download_git": lambda: init_download("git", download_git_url, os.getcwd()),
    "download_python": lambda: init_download("python", download_python_url, os.getcwd()),
    "lfs": "git\\bin\\git lfs install",
    "ensurepip": "python\\python -m ensurepip --default-pip",
    "clone": "git\\bin\\git -c lfs.concurrenttransfers=100 clone https://git.zhaozuohong.vip/mower-ng/mower-ng.git --branch slow",
    "fetch": lambda: f"..\\git\\bin\\git fetch origin {config.conf.branch} --progress",
    "switch": lambda: f"..\\git\\bin\\git -c lfs.concurrenttransfers=100 switch -f {config.conf.branch} --progress",
    "reset": lambda: f"..\\git\\bin\\git -c lfs.concurrenttransfers=200 reset --hard origin/{config.conf.branch}",
    "pip_install": lambda: f"..\\python\\Scripts\\pip install --no-cache-dir -i {mirror_list[config.conf.mirror]} -r requirements.txt --no-warn-script-location",
    "webview": "start ..\\python\\pythonw webview_ui.py",
    "manager": "start ..\\python\\pythonw manager.py",
}


def detect_encoding(stream):
    # 读取一部分数据来检测编码
    raw_data = stream.read(4096)
    result = chardet.detect(raw_data)
    stream.seek(0)  # 将流指针重置到开头
    return result['encoding']


def read_stream(stream, log_func):
    detected_encoding = detect_encoding(stream)
    text_io = io.TextIOWrapper(stream, encoding=detected_encoding, errors='replace')
    try:
        for line in iter(text_io.readline, ''):
            text = line.rstrip('\n')
            custom_event(text.strip() + "\n")
    finally:
        text_io.close()


class Api:

    def load_config(self):
        logger.info("读取配置文件")
        return config.conf.model_dump()

    def save_config(self, conf):
        logger.info(f"更新配置文件{conf}")
        config.conf = config.Conf(**conf)
        config.save_conf()

    def get_version(self):
        return version

    def get_new_version(self):
        logger.info("获取最新版本号")
        response = requests.get(get_new_version_url)
        return response.json()

    # 更新启动器本身
    def update_self(self, download_url):
        logger.info(f"开始更新启动器 {download_url}")
        # 下载压缩包的全路径
        file_name = os.path.basename(download_url)
        current_path = os.getcwd()
        if not download_file("launcher", download_url, current_path):
            return "下载新版本失败"

        download_path = os.path.join(current_path, file_name)
        script_path = os.path.join(os.getcwd(), upgrade_script_name)
        folder_path = os.path.join(os.getcwd(), "_internal")
        exe_path = os.path.join(os.getcwd(), "launcher.exe")
        with open(script_path, "w") as b:
            temp_list = "@echo off\n"
            temp_list += "timeout /t 3 /nobreak\n"  # 等待进程退出
            temp_list += f"rmdir {folder_path}\n"  # 删除_internal
            temp_list += f"del {exe_path}\n"  # 删除exe
            temp_list += f"tar -xf {download_path} -C ..\n"  # 解压压缩包
            temp_list += "timeout /t 1 /nobreak\n"  # 等待解压
            temp_list += f"start {exe_path}\n"  # 启动新程序
            temp_list += f"del {download_path}\n"  # 删除压缩包
            temp_list += "exit"
            b.write(temp_list)
        # 不显示cmd窗口
        Popen([script_path], creationflags=CREATE_NO_WINDOW)
        os._exit(0)

    def rm_site_packages(self):
        site_packages_path = Path("./python/Lib/site-packages")
        if site_packages_path.exists():
            rmtree(site_packages_path)
            return "site-packages目录移除成功"
        return "python\\Lib\\site-packages目录不存在"

    def rm_python_scripts(self):
        python_scripts_path = Path("./python/Scripts")
        if python_scripts_path.exists():
            rmtree(python_scripts_path)
            return "Scripts目录移除成功"
        return "python\\Scripts目录不存在"

    def run(self, command, cwd=None):
        command = command_list[command]
        if callable(command):
            command = command()
            if callable(command):
                return "success" if command() else "failed"
        custom_event(command + "\n")
        try:
            with subprocess.Popen(
                    command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True, cwd=cwd, bufsize=0,
                    universal_newlines=False
            ) as p:
                stdout_thread = threading.Thread(target=read_stream, args=(p.stdout, logger.info))
                stderr_thread = threading.Thread(target=read_stream, args=(p.stderr, logger.info))

                stdout_thread.start()
                stderr_thread.start()

                stdout_thread.join()
                stderr_thread.join()
            if p.returncode == 0:
                return "success"
        except Exception as e:
            logger.error(f"command {command} 执行异常{e}")
            logger.exception(e)
            custom_event(str(e))
        return "failed"


# 如果当前路径存在更新脚本，则删除
if Path(upgrade_script_name).exists():
    os.remove(upgrade_script_name)

window = webview.create_window(
    f"mower-ng launcher {version}", sys_config.get('url'), js_api=Api()
)
webview.start()