twemoji/2/scripts/create-dist

#!/usr/bin/env node

/*! Copyright Twitter Inc. and other contributors. Licensed under MIT *//*
    https://github.com/twitter/twemoji/blob/gh-pages/LICENSE
*/

const fs = require('fs');
const path = require('path');
const { spawnSync } = require('child_process');

function file(...which) {
  return path.join(__dirname, '..', ...which);
}

fs.writeFileSync(
  file('twemoji.npm.js'),
  [
    'var location = global.location || {};',
    fs.readFileSync(file('twemoji.js')),
    'if (!location.protocol) {',
    '  twemoji.base = twemoji.base.replace(/^http:/, "");',
    '}',
    'module.exports = twemoji;'
  ].join('\n')
);

fs.writeFileSync(
  file('twemoji.amd.js'),
  'define(function () {\n' +
    fs.readFileSync(file('twemoji.js')).toString().replace(
      /^(.)/gm, '  $1'
    ) +
  '\n  return twemoji;\n});'
);

spawnSync(
  'yarnpkg',
  [
    'uglifyjs',
    '--verbose',
    file('twemoji.js'),
    '-o',
    file('twemoji.tmp.js')
  ]
);

const copyright = '/*! Copyright Twitter Inc. and other contributors. Licensed under MIT */';
const minifiedContents = fs.readFileSync(file('twemoji.tmp.js'));
fs.unlinkSync(file('twemoji.tmp.js'));

fs.writeFileSync(file('twemoji.min.js'), `${copyright}\n${minifiedContents}`);
fs.writeFileSync(file('twemoji.esm.js'), `${copyright}\n${minifiedContents}\nexport default twemoji;`);

const algorithm = 'sha384';
const digest = spawnSync('openssl', ['dgst', `-${algorithm}`, '-binary', file('twemoji.min.js')]);
if (digest.status || digest.signal){
  throw new Error(digest.stderr.toString('utf8'));
}
const integrityHash = digest.stdout.toString('base64');
const integrity = ``;
const { version } = require('../../package.json');
const src = ``

function updateScript(filename) {
  const newScript = `<script src="https://twemoji.maxcdn.com/2/twemoji.min.js?${version}" integrity="${algorithm}-${integrityHash}"`
  fs.writeFileSync(
    filename,
    fs.readFileSync(filename).toString('utf8').replace(/<script src="[^ ]*" integrity="[^ ]*"/, newScript));
}

updateScript(file('..', 'README.md'));
updateScript(file('templates', 'preview.html'));