wrap-transform.js

// wrap-transform.js
const fs = require('fs');
const parser = require('@babel/parser').parse;
const traverse = require('@babel/traverse').default;
const generate = require('@babel/generator').default;
const prettier = require('prettier');

const file = fs.readFileSync('wrap-before.js').toString();
const ast = parser(file, {sourceType: 'module', plugins: ['jsx']});
let exportDefaultPath;

traverse(ast, {
  ExportDefaultDeclaration(path) {
    exportDefaultPath = path;
  },
})

const declarationName = exportDefaultPath.node.declaration.name;
const reducerNames = ['volleyball', 'soccer'].join(',');

exportDefaultPath.replaceWith(
  parser(
    `
      const mapStateToProps = ({${reducerNames}}) => ({${reducerNames}})

      export default connect(mapStateToProps)(${declarationName})
    `, 
    {sourceType: 'module'}
  )
)

const newCode = generate(ast).code;
const prettifiedCode = prettier.format(newCode, { parser: 'babylon' })

fs.writeFile('wrap-after.js', prettifiedCode, (err) => {
  if (err) throw new Error(err)
});