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export type StrLen<T extends string, __Res extends Array<string> = []> = T extends `${infer A}${infer RestB}`
  ? StrLen<RestB, [...__Res, A]>
  : __Res['length']

export type IsValidPath<
  T extends string,
  __Res extends boolean = StrLen<T> extends 0 ? false : true,
> = T extends `${infer A}${infer RestB}`
  ? __Res extends false
    ? false

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最近发现 机场 + v2raya + GFWList 的全局透明代理的效果最好， 透明代理配置好以后， 就不再需要 SwitchyOmega 和 proxy-ns 其他工具, 省心方便， 下面是具体的攻略：

购买机场
我主要用这个机场, 这个机场的好处是全平台支持， 非 Linux 平台都有专用客户端， 开箱即用很方便。

安装 v2raya
ArchLinux 用yay -S v2raya 命令一键安装 v2raya, 然后在浏览器打开 http://127.0.0.1:2017 进行如下配置：

订阅机场: 拷贝机场订阅 URL, 点击导入按钮导入
选择服务器： 选择 S.JISUSUB.CC 标签， 选择一个合适的服务器， 然后选择左上角启动按钮

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sudo add-apt-repository ppa:xtradeb/apps -y
sudo apt update
sudo apt install chromium

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curl -L "https://github.com/docker/compose/releases/latest/download/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
chmod +x /usr/local/bin/docker-compose

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docker-compose pull
docker-compose up --force-recreate --build -d
docker image prune -f

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export http_proxy="http://172.16.20.151:7890/"
export https_proxy="http://172.16.20.151:7890/"
export no_proxy="localhost,127.0.0.1,::1"

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#![feature(const_trait_impl)]

fn extend_lifetime(x: &str) -> &'static str {
    f::<S>(x)
}

const fn f<'a, T: Tr<'a> + ~const Drop>(x: &'a str) -> T::Ty {
    // can call g with T: Drop bound, even though
    // T: ~const Drop works for non-Drop-implementing types
    g::<T>(x)

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type StrLen<T extends string, R extends Array<string> = []> = T extends `${infer C}${infer P}`
  ? StrLen<P, [...R, C]>
  : R['length']

type StrSplit<T extends string, S extends string, R extends Array<string> = []> = T extends `${infer X}${S}${infer Y}`
  ? StrSplit<Y, S, StrLen<X> extends 0 ? R : [...R, X]>
  : StrLen<T> extends 0
  ? R
  : [...R, T]

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# https://serverfault.com/questions/57529/how-do-i-get-the-md5-of-a-file-on-windows
CertUtil -hashfile yourFileName MD5

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https://clients2.google.com/service/update2/crx?response=redirect&os=win&arch=x64&os_arch=x86_64&nacl_arch=x86-64&prod=chromiumcrx&prodchannel=beta&prodversion=79.0.3945.53&lang=ru&acceptformat=crx3&x=id%3D<ID>%26installsource%3Dondemand%26uc