safely replace npm registry in lock file

index.js

#!/usr/bin/env node

const fs = require('fs');
const path = require('path');
const url = require('url');
const http = require('http');
const https = require('https');
const { promisify } = require('util');
const lockfile = require('@yarnpkg/lockfile');

const [
    ,
    ,
    from = 'registry.npm.taobao.org',
    to = 'registry.npmmirror.com',
] = process.argv;

// e.g. https://registry.npmmirror.com/semver/6.3.0
const view = async (name, version) => {
    const host = /^https?:\/\//.test(to) ? to : ('https://' + to);
    const options = url.parse(`${host}/${encodeURIComponent(name)}/${encodeURIComponent(version)}`);
    options.timeout = 6e4;
    const { request } = options.protocol === 'https:' ? https : http;

    const response = await new Promise((resolve, reject) => {
        request(options)
            .on('response', resolve)
            .on('error', reject)
            .end();
    });

    const chunks = [];

    await new Promise((resolve, reject) => {
        response
            .on('end', resolve)
            .on('error', reject)
            .on('data', (chunk) => chunks.push(chunk));
    });

    return JSON.parse(Buffer.concat(chunks));
};

const hit = (object) => {
    const { version, resolved } = object || {};
    return version && resolved && url.parse(resolved).host === from;
};

const extract = (name) => {
    const index = name.indexOf('@', /^@/.test(name) ? 1 : 0);
    if (index === -1) return name;
    return name.slice(0, index);
};

const replace = async (fileName, parse, stringify) => {
    const input = await promisify(fs.readFile)(fileName, 'utf-8');

    const json = parse(input);

    const infoMap = {};

    const infoPromises = [];

    JSON.stringify(json, (name, value) => {
        name = extract(name);

        const {
            version,
        } = value || {};

        if (hit(value)) {
            const key = name + '@' + version;

            if (!infoMap[key]) {
                infoMap[key] = view(name, version)
                    .then((info) => {
                        infoMap[key] = info;
                    })
                    .catch((e) => {
                        // console.log(444, e);
                    });

                infoPromises.push(infoMap[key]);
            }
        }

        return value;
    });

    await Promise.all(infoPromises);

    const total = Object.keys(infoMap).length;

    if (!total) {
        console.log(`[${fileName}]`, 'no package need to replace');
        return;
    }

    const errorMap = {};

    JSON.stringify(json, (name, value) => {
        name = extract(name);

        const {
            version,
            integrity,
        } = value || {};

        if (hit(value)) {
            const key = name + '@' + version;
            const { dist } = infoMap[key] || {};

            if (dist) {
                if (integrity) {
                    if (integrity.indexOf('sha1-') !== -1) {
                        const legacyIntegrity = 'sha1-' + Buffer.from(dist.shasum, 'hex').toString('base64');
                        if (integrity !== legacyIntegrity) {
                            errorMap[key] = 'IntegrityError';
                        }
                    } else if (integrity.indexOf('sha256-') !== -1) {
                        if (integrity !== dist.integrity) {
                            errorMap[key] = 'IntegrityError';
                        }
                    }
                }
            } else {
                errorMap[key] = 'NoInfoError';
            }

            if (!errorMap[key]) {
                value.resolved = dist.tarball;
            }
        }

        return value;
    }, 4);

    const fail = Object.keys(errorMap).length;

    console.log(`[${fileName}]`, `${total - fail} package(s) replaced well`);
    if (fail) console.error(`[${fileName}]`, `${fail} packages(s) replaced error`, errorMap);

    const output = stringify(json);

    await promisify(fs.copyFile)(fileName, fileName + '.bak');
    await promisify(fs.writeFile)(fileName, output);
};

(async () => {
    const npmLockFileName = 'package-lock.json';
    const yarnLockFileName = 'yarn.lock';

    try {
        await promisify(fs.stat)(npmLockFileName);
        await replace(
            npmLockFileName,
            JSON.parse,
            output => JSON.stringify(output, null, 4) + '\n'
        );
    } catch (_) {}

    try {
        await promisify(fs.stat)(yarnLockFileName);
        await replace(
            yarnLockFileName,
            input => lockfile.parse(input).object,
            lockfile.stringify
        );
    } catch (_) {}
})();

package.json

{
  "name": "package-lock-registry-replacer",
  "version": "2.1.0",
  "author": "nondanee",
  "bin": "./index.js",
  "dependencies": {
     "@yarnpkg/lockfile": "*"
  }
}

npx https://gist.github.com/nondanee/ec8ea08e9ec8c5d6e5bb42825e9cd3f0

npx https://gist.github.com/nondanee/ec8ea08e9ec8c5d6e5bb42825e9cd3f0 registry.nlark.com