路线 2 · PC 性能与 Git 工作流实时监控副屏

💻 工程源码路径：github.com/Xepanda/kindle-geek-toolbox/tree/master/pc_hud_monitor

将 Kindle 摆在电脑显示器旁，作为一块无频闪、不伤眼的 600×800 极客硬件监控副屏 (Workstation HUD)。

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1. 架构流转原理

• 常亮保障：在调试前执行 ssh kindle "lipc-set-prop com.lab126.powerd preventScreenSaver 1"，确保设备永不休眠；
• 局部刷新：使用 eips -g /mnt/us/hud.png 执行局部快速更新，避免全屏黑白闪烁，观感极为舒适。

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2. 核心监控脚本 (monitor_hud.py)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Kindle 8 (600x800 Portrait) PC Performance & Git Status HUD Monitor
"""
import os, sys, subprocess, psutil
from datetime import datetime
from PIL import Image, ImageDraw, ImageFont

WIDTH, HEIGHT = 600, 800

def get_git_status(repo_path="D:\\ePanda\\wiki"):
    branch = subprocess.run(['git', 'branch', '--show-current'], cwd=repo_path, capture_output=True, text=True).stdout.strip()
    status = subprocess.run(['git', 'status', '--porcelain'], cwd=repo_path, capture_output=True, text=True).stdout.strip()
    return branch or 'master', len(status.splitlines()) if status else 0

def render_hud(output_path='hud.png'):
    img = Image.new('L', (WIDTH, HEIGHT), color=255)
    draw = ImageDraw.Draw(img)
    font_path = "C:\\Windows\\Fonts\\msyh.ttc"

    cpu_percent = psutil.cpu_percent(interval=0.4)
    ram = psutil.virtual_memory()
    disk_c = psutil.disk_usage('C:\\')
    disk_d = psutil.disk_usage('D:\\') if os.path.exists('D:\\') else disk_c
    branch, git_mods = get_git_status()

    # 1. 顶部 Header
    draw.rectangle([(20, 15), (580, 65)], fill=240, outline=0, width=2)
    draw.text((35, 26), "⚡ PC WORKSTATION HUD 监控屏", fill=0, font=ImageFont.truetype(font_path, 21))
    draw.text((475, 28), datetime.now().strftime("%H:%M:%S"), fill=0, font=ImageFont.truetype(font_path, 16))

    # 2. CPU & RAM 进度卡片 (竖版排版)
    draw.rectangle([(20, 80), (580, 195)], fill=255, outline=0, width=2)
    draw.text((35, 92), "💻 CPU 总体利用率", fill=60, font=ImageFont.truetype(font_path, 13))
    draw.text((35, 115), f"{cpu_percent:.1f}%", fill=0, font=ImageFont.truetype(font_path, 32))

    draw.rectangle([(20, 210), (580, 325)], fill=255, outline=0, width=2)
    draw.text((35, 222), "🧠 物理内存 (RAM)", fill=60, font=ImageFont.truetype(font_path, 13))
    draw.text((35, 245), f"{ram.percent:.1f}%", fill=0, font=ImageFont.truetype(font_path, 32))

    # 3. 磁盘与 Git 状态
    draw.rectangle([(20, 340), (580, 495)], fill=255, outline=0, width=2)
    draw.text((35, 352), "💾 存储空间与 Git 状态 (PandaWiki)", fill=60, font=ImageFont.truetype(font_path, 13))
    draw.text((35, 378), f"• C盘剩余: {disk_c.free/(1024**3):.1f} GB | D盘剩余: {disk_d.free/(1024**3):.1f} GB", fill=0, font=ImageFont.truetype(font_path, 16))
    draw.text((35, 412), f"• 活跃分支: {branch}", fill=0, font=ImageFont.truetype(font_path, 16))
    status_txt = "代码库整洁 (Clean)" if git_mods == 0 else f"⚠️ 有 {git_mods} 个文件待提交"
    draw.text((35, 446), f"• 变更状态: {status_txt}", fill=0, font=ImageFont.truetype(font_path, 16))

    img.save(output_path)
    return output_path

def push_to_kindle(img_path='hud.png'):
    subprocess.run(f'scp -o ConnectTimeout=4 "{img_path}" root@kindle:/mnt/us/hud.png', shell=True)
    subprocess.run('ssh kindle "eips -g /mnt/us/hud.png"', shell=True)

if __name__ == '__main__':
    push_to_kindle(render_hud())

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3. 实机验证

运行 python monitor_hud.py，Kindle 屏幕瞬间完成局部刷新，清晰展示当前 PC 的 CPU 负载进度条、RAM 利用率、磁盘空间与 Git 分支状态（600×800 满屏呈现）！