用 Hammerspoon 搞定远程锁屏与 SMB 动态挂载

-- ~/.hammerspoon/init.lua (运行在 Mac mini 上)
local connected = false

local function checkVNC()
    local output = hs.execute("netstat -an | grep '\\.5900 .*ESTABLISHED'")
    if output ~= "" then
        hs.caffeinate.set("displayIdle", true, true)
        if not connected then
            hs.notify.new({
                title = "Hammerspoon",
                informativeText = "Screen Sharing 已连接，防锁屏已启用"
            }):send()
            connected = true
        end
    else
        hs.caffeinate.set("displayIdle", false, true)
        if connected then
            hs.notify.new({
                title = "Hammerspoon",
                informativeText = "Screen Sharing 已断开，防锁屏已关闭"
            }):send()
            connected = false
        end
    end
end

-- 每 3 秒检测一次
hs.timer.doEvery(3, checkVNC):start()

-- ~/.hammerspoon/init.lua (运行在 MacBook Air 上)
local servers   = { "169.254.169.99", "mini" } -- 优先 USB-C 直连，Fallback 到 Tailscale
local shareName = "TiPlus"                     -- Mac mini 外挂的 2 TB 共享名
local mountTimer = nil

-- 检查是否已挂载（兼容 /Volumes/TiPlus 及 TiPlus-1 等路径）
local function isMounted()
    local iter, dir_obj = hs.fs.dir("/Volumes")
    if iter then
        for file in iter, dir_obj do
            if file:sub(1, 6) == "TiPlus" then
                return true, "/Volumes/" .. file
            end
        end
    end
    return false, nil
end

-- 静默预检：1 秒内检测 445 端口，拦截系统报错弹窗
local function isPortOpen(host)
    local cmd = string.format("nc -z -w 1 %s 445 >/dev/null 2>&1", host)
    local code = os.execute(cmd)
    return (code == 0 or code == true)
end

-- 挂载核心函数
local function mountTiPlus(manualAlert)
    local mounted, currentPath = isMounted()
    if mounted then
        print("[TiPlus] 已经挂载于: " .. currentPath)
        if manualAlert then hs.alert.show("TiPlus 已经挂载于 " .. currentPath) end
        return true
    end

    if manualAlert then hs.alert.show("正在尝试挂载 TiPlus...") end

    -- 依次尝试高速直连 IP 与 Tailscale 域名
    for _, serverHost in ipairs(servers) do
        print("[TiPlus] 正在预检服务器 " .. serverHost .. " 端口...")
        if isPortOpen(serverHost) then
            local shareURL = "smb://" .. serverHost .. "/" .. shareName
            print("[TiPlus] 端口连通，执行安全挂载: " .. shareURL)

            local ok, result = hs.osascript.applescript('mount volume "' .. shareURL .. '"')
            if ok then
                print("[TiPlus] 挂载成功，当前通道: " .. serverHost)
                if manualAlert then hs.alert.show("TiPlus 挂载成功（" .. serverHost .. "）") end
                return true
            end
        else
            print("[TiPlus] 节点 " .. serverHost .. " 离线，静默跳过")
        end
    end

    print("[TiPlus] 当前所有网络通道均不可达")
    if manualAlert then hs.alert.show("TiPlus 挂载失败，网络未连通") end
    return false
end

-- 1. 启动或重载配置时主动检测一次
mountTiPlus(false)

-- 2. 网络事件监听：无论哪条通道恢复连通，自动尝试挂载
for _, serverHost in ipairs(servers) do
    local reachability = hs.network.reachability.forHostName(serverHost)
    if reachability then
        reachability:setCallback(function(self, flags)
            local isReachable = (flags & hs.network.reachability.flags.reachable) > 0
            if isReachable then
                if mountTimer then mountTimer:stop() end
                mountTimer = hs.timer.doAfter(1, function()
                    mountTiPlus(false)
                end)
            end
        end):start()
    end
end

-- 3. 快捷键手动挂载 (Option + Command + M)
hs.hotkey.bind({"alt", "cmd"}, "M", function()
    mountTiPlus(true)
end)