SukkaSurge/Build/build-chn-cidr.ts

import { fetchRemoteTextByLine } from './lib/fetch-text-by-line';
import { task } from './trace';

import { contains as containsCidr, exclude as excludeCidr } from 'fast-cidr-tools';
import { createMemoizedPromise } from './lib/memo-promise';
import { CN_CIDR_MISSING_IN_CHNROUTE, NON_CN_CIDR_INCLUDED_IN_CHNROUTE } from './constants/cidr';
import { appendArrayInPlace } from 'foxts/append-array-in-place';
import { IPListOutput } from './lib/rules/ip';
import { createFileDescription } from './constants/description';

const PROBE_CHN_CIDR_V4 = [
  // NetEase Hangzhou
  '223.252.196.38',
  // Aliyun ShenZhen
  '120.78.92.171'
];

export const getChnCidrPromise = createMemoizedPromise(async function getChnCidr() {
  const [_cidr4, cidr6] = await Promise.all([
    fetchRemoteTextByLine('https://raw.githubusercontent.com/misakaio/chnroutes2/master/chnroutes.txt', true).then(Array.fromAsync<string>),
    fetchRemoteTextByLine('https://gaoyifan.github.io/china-operator-ip/china6.txt', true).then(Array.fromAsync<string>)
  ]);

  const cidr4 = excludeCidr(
    appendArrayInPlace(_cidr4, CN_CIDR_MISSING_IN_CHNROUTE),
    NON_CN_CIDR_INCLUDED_IN_CHNROUTE,
    true
  );

  for (const probeIp of PROBE_CHN_CIDR_V4) {
    if (!containsCidr(cidr4, PROBE_CHN_CIDR_V4)) {
      const err = new TypeError('chnroutes missing probe IP');
      err.cause = probeIp;
      throw err;
    }
  }

  return [cidr4, cidr6] as const;
});

export const buildChnCidr = task(require.main === module, __filename)(async (span) => {
  const [filteredCidr4, cidr6] = await span.traceChildAsync('download chnroutes2', getChnCidrPromise);

  // Can not use SHARED_DESCRIPTION here as different license
  const description = createFileDescription('CC BY-SA 2.0');

  return Promise.all([
    new IPListOutput(span, 'china_ip', false)
      .withTitle('Sukka\'s Ruleset - Mainland China IPv4 CIDR')
      .withDescription([
        ...description,
        'Data from https://misaka.io (misakaio @ GitHub)'
      ])
      .bulkAddCIDR4(filteredCidr4)
      .write(),
    new IPListOutput(span, 'china_ip_ipv6', false)
      .withTitle('Sukka\'s Ruleset - Mainland China IPv6 CIDR')
      .withDescription([
        ...description,
        'Data from https://github.com/gaoyifan/china-operator-ip'
      ])
      .bulkAddCIDR6(cidr6)
      .write()
  ]);
});