electron-builder s3 publisher, to be able to triggered it manually reusing a preexisting file

publisher.js

'use strict';
// Alternative version
const { PublishManager } = require('app-builder-lib/out/publish/PublishManager');
const { normalizeOptions } = require('electron-builder/out/builder');
const { Packager } = require('app-builder-lib/out/packager');
const pkg = require('../package.json');
const argv = require('yargs').argv;

const buildFile = argv.file.replace('${version}', pkg.version);
const buildDir = argv.buildDir || './build/';
const channel = argv.channel || 'latest';
const publisherInfo = {
    path: null,
    provider: "s3",
    channel: channel,
    bucket: "bucket-name",
    region: "region-name"
};
const options = normalizeOptions({
    x64: true,
    windows: [],
    publish: 'always'
});
const packager = new Packager(options);
const publishManager = new PublishManager(packager, options);
const upload = async () => {
    const artifacts = [
        `${buildDir}/${buildFile}`,
        `${buildDir}/${buildFile}.blockmap`,
        `${buildDir}/${channel}.yml`,
    ];

    for (const artifact of artifacts) {
        publishManager.scheduleUpload(publisherInfo,
            { file: artifact, arch: null },
            {
                version: pkg.version,
                buildNumber: undefined,
                buildVersion: pkg.version,
            });
    }
    await publishManager.awaitTasks();
}

try {
    upload();
} catch (err) {
    packager.cancellationToken.cancel();
    publishManager.cancelTasks();
}

s3publisher.js

'use strict';
/**
 * Usage: node s3publisher.js --file=MyApp-v1.0.0.exe --channel=beta
 * Options: 
 * --file: distributable file, normally nsis installer, dmg, snap, etc
 * --buildDir: (optional) folder where the files are located (default: ./build)
 * --channel: (optional) channel to upload yml
*/
const { MultiProgress } = require("electron-publish/out/multiProgress");
const { CancellationToken } = require('builder-util-runtime');
// is using s3 but you could choose another one under the 'app-builder-lib/out/publish' folder
const S3Publisher = require('app-builder-lib/out/publish/s3/s3Publisher').default;
// const S3Publisher = require('electron-publisher-s3').default;
const argv = require('yargs').argv;

const buildDir = argv.buildDir || './build/';
const channel = argv.channel || 'latest';
const publisherContext = {
    cancellationToken: new CancellationToken(),
    progress: new MultiProgress()
};
// it uses the same config: https://www.electron.build/configuration/publish#s3options
const publisherInfo = {
    path: null,
    provider: "s3",
    channel: channel,
    bucket: "bucket-name",
    region: "region-name"
};
const publisher = new S3Publisher(publisherContext, publisherInfo);
const upload = async () => {
    try {
        await publisher.upload({ file: `${buildDir}/${argv.file}` });
        await publisher.upload({ file: `${buildDir}/${argv.file}.blockmap` });
        await publisher.upload({ file: `${buildDir}/${channel}.yml` });
    } catch (err) {
        console.error('Publisher Failed', err);
    }
};

upload();