collect all dependencies from js file

collect.js

const s = process.argv[2];
const searchString = (string, pattern) =>
  string
    .match(new RegExp(pattern.source, pattern.flags))
    .map(match => new RegExp(pattern.source, pattern.flags).exec(match));

console.log(
  searchString(s, /require\(\'(.*)'\)/gi)
    .map(([_, r]) => r)
    .join(' '),
);

script.sh

cat file | xargs -0 -I _ node collect.js _