Script for converting absolute module paths to relative

absolute-to-relative.ts

import * as Path from 'path';
import * as recursive from 'recursive-readdir';
import * as Fs from 'fs';
import * as xregexp from 'xregexp';

const root = Path.resolve(__dirname, '..');

recursive(root, ['!*.js'], (error, files) => {
  files.forEach(file => {
    const fileContent = Fs.readFileSync(file, 'utf-8');
    const regex = xregexp(/require\(["']([^"']*)["']\)/);
    const modifiedFileContent = xregexp.replace(
      fileContent,
      regex,
      (wholeRequire: any, modulePath: any) => {
        try {
          require(modulePath);
          return wholeRequire;
        } catch (error) {
          let newRequirePath = Path.relative(`${file}/..`, `${root}/${modulePath}`);
          if (newRequirePath[0] !== '.') newRequirePath = './' + newRequirePath;
          return `require("${newRequirePath}")`;
        }
      },
      'all',
    );
    Fs.writeFileSync(file, modifiedFileContent, 'utf-8');
  });
});