humpty/src/findApiChanges.js

Makes sure your changelogs mention your breaking changes

// @flow

import * as changeTypes from "./changeTypes";
import findReactApiChanges from "./findReactApiChanges";

export default function findApiChanges({ oldExports, newExports }) {
  return oldExports
    .map(oldExport => {
      const exportResult = {
        isDefaultExport: oldExport.isDefaultExport,
        apiChanges: []
      };
      const newExport = newExports.find(
        ({ isDefaultExport }) => isDefaultExport === oldExport.isDefaultExport
      );

      if (!newExport) {
        exportResult.apiChanges.push({
          changeType: changeTypes.EXPORT_REMOVED
        });
      } else {
        exportResult.apiChanges.push(
          ...findReactApiChanges(oldExport, newExport)
        );
      }

      return exportResult.apiChanges.length ? exportResult : null;
    })
    .filter(exportChange => !!exportChange);
}