react-proptypes-migration-with-reordering.js

const fs = require('fs');
const path = require('path');

const execSync = require('child_process').execSync;

const regex = /^(import PropTypes from 'prop-types';)\n(\/\/ \(C\) Copyright.*)\n\n(import React(?:.*) from 'react';)([\s\S]*)$/;

const processDirectory = (dir) => {
  fs.readdirSync(dir).forEach((file) => {
    if (fs.lstatSync(path.join(dir, file)).isDirectory()) {
      if (file !== 'base')
        processDirectory(path.join(dir, file));
    } else {
      const fileName = path.join(dir, file);
      execSync(
        `jscodeshift -t ../react-codemod/transforms/React-PropTypes-to-prop-types.js ${fileName}`
      );
      const contents = fs.readFileSync(path.join(dir, file), 'utf-8');

      if (regex.test(contents)) {
        fs.writeFileSync(
          path.join(dir, file),
          contents.replace(regex, '$2\n\n$3\n$1$4'),
          'utf-8');
      }
    }
  });
};

processDirectory(path.join(__dirname, 'src', 'js'));