// 該当ディレクトリ以下で find . | grep -E "jsx$" | xargs -I {} node searchSameMethod.js {}
const fs = require('fs');
const filepath = process.argv[2]

const main = async (filepath) => {
  const file = await readutf8(filepath);
  const pa = file.match(/^  ([a-zA-z]*)\(/gm);
  const pb = file.match(/^  ([a-zA-z]*) =/gm);
  let matched;
  if (pa && pb) {
    matched = pa.concat(pb);
  } else if (pb === null) {
    matched = pa;
  } else {
    matched = pb;
  }

  if (!matched) {
    return;
  }

  matched.forEach((e, i) => {
    const filterd = matched.filter((b, idx) => idx !== i);
    filterd.forEach(element => {
      if (element === e) console.log('element', filepath, element);
    });
  });
}

main(filepath)

async function readutf8(filepath) {
  return new Promise((resolve, reject) => {
    return fs.readFile(filepath, { encoding: 'utf8' }, (err, data) => {
      return err ? reject(err) : resolve(data);
    });
  });
}

```