A very dumb and non-compliant IPFS gateway to git

ipfs-gitway.mjs

// Adin (paraphrased): "If I take a script and wrap git so it prefixes its hashes with f017c1114,
// do we have IPFS yet?"

import express from 'express';
import process from 'process';
import { join } from 'path';

// path to a .git
const gitDir = join(process.argv[2], 'objects');
const app = express();

app.get('/ipfs/:cid', (req, res) => {
  const { cid } = req.params;
  if (!/^f017c1114/.test(cid) || !/^\w+$/.test(cid)) return res.status(404).send('Not found');
  const gitPath = join(gitDir, cid.replace(/^f017c1114/, '').replace(/^(..)/, '$1/'));
  console.warn(`Fetching ${gitPath}`);
  res.sendFile(gitPath, (err) => {
    if (err) res.status(404).send('Not found');
  });
});
app.listen(8877, () => {
  console.warn(`IPFS Gitway up on http://localhost:8877! 💖💕`);
});

Neat!