Download pasted images for md from Github

main.js

const fs = require('node:fs');
const fsPromise = require('node:fs/promises');

const { https } = require('follow-redirects');
const { glob } = require('glob');

async function download(url, toFile) {
  const file = fs.createWriteStream(toFile);
  await new Promise((resovle, reject) => {
    console.log('downloading file:', url);
    https.get(url, (response) => {
      response.pipe(file);
    });

    file.on("finish", () => {
      file.close();
      console.log("Download Completed");
      resovle();
    });
  });
}

async function run() {
  const mds = await glob('**/*.md', { ignore: ['node_modules/**'] });
  const re = /^(\s*!\[[^\]]*\])\((https\:\/\/github\.com.*)\)/;
  for (const f of mds) {
    const file = await fsPromise.open(f);
    const content = [];
    let changed = false;
    for await (const line of file.readLines()) {
      const matcher = line.match(re);
      if (matcher) {
        changed = true;
        const imgFileName = matcher[2].split('/').pop();
        const imgFilePath = `${f.replace(/\/[^/]+\.md$/, '/')}${imgFileName}.png`;
        await download(matcher[2], imgFilePath);
        content.push(`${matcher[1]}(./${imgFileName}.png)`);
      } else {
        content.push(line);
      }
    }
    if (changed) {
      content.push('\n');
      await fsPromise.writeFile(f, content.join('\n'));
      console.log('file resovled:', f);
    }
  }
}

run()
  .then(() => {
    console.log('done');
    process.exit(0);
  })
  .catch((err) => {
    console.error(err);
    process.exit(1);
  });