cli.js

#!/usr/bin/env node
import { program } from 'commander';

import start from './index.js';

import { DEFAULT_REPEAT_TIMES, DEFAULT_OUTPUT_FORMAT, DEFAULT_VIEWPORT_SIZE } from './src/constants.js';

program
  .description('Measures web application loading metrics')
  .usage('<url> [options] ')
  .arguments('<url>')
  .action((url) => {
    program.url = url;
  })
  .option('-r, --repeat [n]', 'The number of times the page metrics are measured', DEFAULT_REPEAT_TIMES)
  .option('-w, --width [width]', "The viewport's width to set", DEFAULT_VIEWPORT_SIZE.WIDTH)
  .option('-H, --height [height]', "The viewport's height to set", DEFAULT_VIEWPORT_SIZE.HEIGHT)
  .option('-c, --custom-path [custom-path]', 'Path to custom path configuration file')
  .option('-o, --output-format [output-format]', 'The desired output format', DEFAULT_OUTPUT_FORMAT.CLI)
  .option('--output-file [output-file]', 'Whether we want to export data in a file, and the desired path to the file')
  .option('--wait-until [wait-until]', 'The waitUntil value of the Page.reload options accepted by puppeteer')
  .option('--with-redirects', 'Whether we want to test the timings of the whole redirect chain')
  .option('--no-headless', 'Defines if we dont want to use puppeteer headless mode')
  .option('--no-sandbox', 'Disable chrome sandbox mode, mandatory in some systems')
  .parse(process.argv);

const errorHandler = (error) => {
  throw error;
};

if (!program.url) {
  program.help();

  throw new Error('You must provide a url');
} else {
  try {
    start({ ...program.opts(), url: program.url }, errorHandler).then((output) => {
      console.log(output);
    });
  } catch (error) {
    errorHandler(error);
  }
}