Quick `now` re-alias script, if run inside the current project dir

now-realias.js

#!/usr/bin/env node
const Now = require('now-client');
const now = Now(); // this looks like it detect the token from ~/.now.json or the env automatically
const pkg = require(process.cwd() + '/package.json');

now.getDeployments().then(res => {
  const [latest, prev, ...rest] = res.filter(_ => _.name === pkg.name).sort((a, b) => b.created - a.created);

  console.log(`getting alias for ${prev.uid} (${prev.url})`);
  return now.getAliases(prev.uid).then(res => {
    const first = res.shift(); // expecting a single alias - otherwise ¯\_(ツ)_/¯
    console.log(`aliasing to ${first.alias}...`);
    return now.createAlias(latest.uid, first.alias);
  });
})
.then(() => console.log('done'))
.catch(e => console.error(e));