persea/package.js

const {execSync} = require('child_process');
const {join} = require('path');
const fs = require('fs-extra')

const cwd = process.cwd();
const [exe, script, package] = process.argv;

const path = join(cwd, 'packages', package);
try {
  fs.accessSync(path);
  console.error(`Package '${package}' already exists, aborting.`);
  process.exit(1);
}
catch (error) {}

const [scope] = require('./package.json').name.split('/');
const name = [scope, package].join('/');
console.log(`Copying new project '${name}' to ${path}...`);
fs.copySync(
  join(cwd, 'config/package'),
  path,
);
const json = {
  name,
  ...require(join(path, 'package.json')),
};
fs.writeFileSync(
  join(path, 'package.json'),
  JSON.stringify(json, null, 2),
);

const exec = (cmd) => execSync(cmd, {cwd: path, stdio: 'inherit'});
console.log(`Installing...`);
exec('yarn');

console.log(`Testing...`);
exec('yarn run test');