Sample codemod transformation to refactor react-native < 25 to react-native 25

refactor-to-react-native-25.js

export default function transformer(file, api, options) {
  const j = api.jscodeshift;

  const printOptions = options.printOptions || {quote: 'single'};
  const root = j(file.source);
  
  const reactImport = () => {
    return j.importDeclaration(
      [
        j.importDefaultSpecifier(
          j.identifier('React')
        ),
        j.importSpecifier(
          j.identifier('Component'),
          j.identifier('Component')
        )
      ],
      j.literal('react')
    )
  }

  //first we need to remove Component from react-native import
  //import { Component } from 'react-native'
  const a = root.find(
    j.ImportDeclaration, { source: { value: 'react-native' }}
  ).forEach((path) => {
    j(path)
      .find(j.ImportDefaultSpecifier, { local: { name: 'React' }})
      .remove()
  }).forEach((path) => {
    j(path)
      .find(j.ImportSpecifier, { local: { name: 'Component' }})
      .remove()
  });
  
  root.get().value.program.body.unshift(reactImport());
  
  return root.toSource();
};