beam-cli/dist/server/server.js

A beautifully simple CLI for running Lighthouse audits on a statically generated (SSG) website

import zlib from 'node:zlib';
import process from 'node:process';
import ora from 'ora';
import compress from 'koa-compress';
import portscanner from 'portscanner';
import { startDevServer } from '@web/dev-server';
import { warningMessage } from '../console/print.js';
export const initialiseServer = async (options) => {
    const port = await portscanner.findAPortNotInUse(options.server.port, options.server.port + 20, '127.0.0.1');
    if (port !== options.server.port) {
        warningMessage(`Port ${options.server.port} was already in use, using ${port} instead.`);
    }
    const spinner = ora({
        text: 'Starting Server',
        color: 'cyan',
    });
    spinner.start();
    const koaCompress = compress({
        filter(content_type) {
            return /(text|application)/i.test(content_type);
        },
        threshold: 1024,
        gzip: {},
        deflate: {},
        br: {
            params: {
                [zlib.constants.BROTLI_PARAM_QUALITY]: options.server.brotliCompressionLevel,
            },
        },
    });
    const server = await startDevServer({
        config: {
            rootDir: `${process.cwd()}/${options.dist}`,
            port,
            open: false,
            nodeResolve: false,
            middleware: [koaCompress],
            esbuildTarget: 'esnext', // Skip transforms
        },
        logStartMessage: false,
    });
    spinner.succeed('Server started');
    return {
        server,
        port,
    };
};