rename .js -> .jsx for JS files containing JSX

rename-jsx.mjs

// @ts-check
import * as fsp from "node:fs/promises";
import * as util from "node:util";
import glob from "glob";

const matchingReactString = "from 'react'";

const BLUE = "\u001b[34m";
const YELLOW = "\u001b[33m";
const RESET = "\u001b[0m";

let matches = await util.promisify(glob)(process.argv[2]);

console.log(`${BLUE}Found these files matching the globs specified:${RESET}`);
console.log(matches);

matches.forEach(async (path) => {
	const result = await fsp.readFile(path);
	if (!result.includes(matchingReactString)) return;
	// Just add 'x' to the end to make it 'jsx'
	const newPath = path.concat("x");
	console.log(`${YELLOW}Renaming ${path} to ${newPath}${RESET}`);
	fsp.rename(path, newPath);
});