vendor_magisk/magisk.py

#!/usr/bin/env python3
import hashlib
import os
import platform
import re
import shutil
import subprocess
import urllib.request
import zipfile


def calculate_md5(file_path):
    """计算文件的 MD5 值"""
    hash_md5 = hashlib.md5()
    with open(file_path, "rb") as f:
        for chunk in iter(lambda: f.read(4096), b""):
            hash_md5.update(chunk)
    return hash_md5.hexdigest()


def download_file(url, file_path):
    """下载文件"""
    print(f"==> Downloading from {url}")
    urllib.request.urlretrieve(url, file_path)


def get_host_arch():
    """获取主机架构信息"""
    machine = platform.machine()

    mapping = {
        "i686": ("x86", 32),
        "x86_64": ("x86_64", 64),
        "aarch64": ("arm64", 64),
        "armv7l": ("arm", 32),
        "armv8l": ("arm", 32)
    }
    if machine in mapping:
        # if mapping[machine] == "x86_64":
        #     with open("/proc/cpuinfo") as f:
        #         if "sse4_2" not in f.read():
        #             print("x86_64 CPU does not support SSE4.2, falling back to x86...")
        #             return ("x86", 32)
        return mapping[machine]
    
    # 如果不在映射中，默认返回 arm64（适用于 Android 构建）
    print(f"Warning: platform.machine '{machine}' architecture not recognized, defaulting to arm64")
    return ("arm64", 64)


def run_command(cmd):
    """运行命令"""
    try:
        subprocess.run(cmd, check=True)
    except subprocess.CalledProcessError as e:
        print(f"Command failed: {' '.join(cmd)}")
        raise e


class Magisk:
    def __init__(self):
        self.download_loc = os.path.join(os.path.dirname(os.path.abspath(__file__)), "downloads")
        self.dl_link = "https://github.com/topjohnwu/Magisk/releases/download/v30.2/Magisk-v30.2.apk"
        self.dl_file_name = os.path.join(self.download_loc, "magisk.apk")
        self.act_md5 = "2691c30ccf059af2536cb0af803c787c"
        self.extract_to = os.path.join(os.path.dirname(os.path.abspath(__file__)), "temp")
        self.copy_dir = os.path.join(os.path.dirname(os.path.abspath(__file__)), "magisk")
        self.magisk_dir = os.path.join(self.copy_dir, "system", "etc", "init", "magisk")
        self.machine = get_host_arch()  # 返回 (arch, bits) 元组

    def download(self):
        """下载 Magisk APK"""
        print("==> Downloading latest Magisk now .....")
        
        # 确保下载目录存在
        os.makedirs(self.download_loc, exist_ok=True)
        
        # 检查并下载 Magisk APK
        need_download = True
        if os.path.exists(self.dl_file_name):
            print("==> Checking existing Magisk APK...")
            actual_md5 = calculate_md5(self.dl_file_name)
            if actual_md5 == self.act_md5:
                print("==> Magisk APK already exists and verified!")
                need_download = False
            else:
                print(f"==> MD5 mismatch. Expected: {self.act_md5}, Got: {actual_md5}")
        
        if need_download:
            download_file(self.dl_link, self.dl_file_name)
            actual_md5 = calculate_md5(self.dl_file_name)
            if actual_md5 != self.act_md5:
                raise Exception(f"Downloaded file MD5 verification failed! Expected: {self.act_md5}, Got: {actual_md5}")
            print("==> Download completed and verified!")

    def extract(self):
        """解压 APK 文件"""
        print("==> Extracting Magisk APK...")
        
        # 清理并创建解压目录
        shutil.rmtree(self.extract_to, ignore_errors=True)
        os.makedirs(self.extract_to, exist_ok=True)
        
        # 解压 APK
        with zipfile.ZipFile(self.dl_file_name) as z:
            z.extractall(self.extract_to)

    def copy(self):
        """复制文件到目标目录"""
        print("==> Copying magisk files now ...")
        
        # 清理并创建目标目录
        if os.path.exists(self.copy_dir):
            shutil.rmtree(self.copy_dir)
        os.makedirs(self.magisk_dir, exist_ok=True)
        os.makedirs(os.path.join(self.copy_dir, "sbin"), exist_ok=True)
        
        # 架构映射
        arch_map = {
            "x86": "x86",
            "x86_64": "x86_64",
            "arm": "armeabi-v7a",
            "arm64": "arm64-v8a"
        }
        
        # 复制主要架构的库文件
        lib_dir = os.path.join(self.extract_to, "lib", arch_map[self.machine[0]])
        if os.path.exists(lib_dir):
            for parent, dirnames, filenames in os.walk(lib_dir):
                for filename in filenames:
                    o_path = os.path.join(lib_dir, filename)
                    so_name = re.search(r'lib(.*)\.so', filename)
                    if so_name:
                        n_path = os.path.join(self.magisk_dir, so_name.group(1))
                        shutil.copyfile(o_path, n_path)
                        run_command(["chmod", "+x", n_path])
        
        # 复制 arm32 的 magisk 二进制文件（如果存在）
        lib32_path = os.path.join(self.extract_to, "lib", "armeabi-v7a")
        magisk32_src = os.path.join(lib32_path, "libmagisk32.so")
        magisk32_dst = os.path.join(self.magisk_dir, "magisk32")
        if os.path.exists(magisk32_src):
            shutil.copyfile(magisk32_src, magisk32_dst)
            run_command(["chmod", "+x", magisk32_dst])
        
        # 复制 magisk.apk 到目标目录
        apk_dst = os.path.join(self.magisk_dir, "magisk.apk")
        if os.path.exists(self.dl_file_name):
            shutil.copyfile(self.dl_file_name, apk_dst)
        
        print("==> Magisk installation completed!")

    def run(self):
        """执行完整的构建流程"""
        try:
            self.download()
            self.extract()
            self.copy()
        except Exception as e:
            print(f"Error: {e}")
            return False
        return True


def main():
    """主函数"""
    magisk = Magisk()
    success = magisk.run()
    if success:
        print("==> Magisk vendor package created successfully!")
    else:
        print("==> Failed to create Magisk vendor package!")
        exit(1)


if __name__ == '__main__':
    main()