#!/bin/bash
# 检查设备上能不能往 Gitee 推代码。
set -u

echo "===== 1. git 有没有 ====="
if command -v git >/dev/null 2>&1; then
    echo "  git $(git --version | awk '{print $3}')"
else
    echo "  ✗ 没有 git"
    exit 0
fi

echo
echo "===== 2. 有没有 SSH 密钥 ====="
if [ -f ~/.ssh/id_ed25519.pub ]; then
    echo "  已有 ed25519 公钥："
    cat ~/.ssh/id_ed25519.pub | sed 's/^/    /'
elif [ -f ~/.ssh/id_rsa.pub ]; then
    echo "  已有 rsa 公钥："
    cat ~/.ssh/id_rsa.pub | sed 's/^/    /'
else
    echo "  没有密钥（需要生成一个，再把公钥加到 Gitee）"
fi

echo
echo "===== 3. 能不能连上 Gitee ====="
echo -n "  DNS: "
getent hosts gitee.com | head -1 || echo "解析不了"
echo -n "  SSH 22 端口: "
timeout 8 bash -c 'exec 3<>/dev/tcp/gitee.com/22' 2>/dev/null && echo "通" || echo "不通"
echo -n "  HTTPS 443: "
timeout 8 bash -c 'exec 3<>/dev/tcp/gitee.com/443' 2>/dev/null && echo "通" || echo "不通"

echo
echo "===== 4. SSH 认证测试 ====="
timeout 20 ssh -o StrictHostKeyChecking=no -o BatchMode=yes \
    -T git@gitee.com 2>&1 | head -3 | sed 's/^/  /'

echo
echo "===== 5. 磁盘空间 ====="
df -h /root | tail -1 | sed 's/^/  /'