Now v2 local dev for Node.js

index.js

require("dotenv-safe").config();

const url = require("url");
const now = require("./now.json");

const routes = now.routes
  .filter(route =>
    now.builds.some(
      build =>
        build.src.startsWith(`${route.dest.substring(1)}/`) &&
        ["@now/node", "@now/node@canary"].includes(build.use)
    )
  )
  .reduce(
    (acc, route) => ({
      ...acc,
      [route.src]: require(`.${route.dest}`)
    }),
    {}
  );

const routeKeys = Object.keys(routes);

console.info(
  `Found ${routeKeys.length} lambdas!\n\n`,
  JSON.stringify(routeKeys, null, 2)
);

module.exports = async (req, res) => {
  const { pathname } = url.parse(req.url);

  const key = routeKeys.find(key => pathname.match(new RegExp(key)));

  if (!key) {
    res.writeHead(404);
    res.end();

    return;
  }

  try {
    await routes[key](req, res);
  } catch (err) {
    console.error(err);
  }
};

now.json

{
  "builds": [
    { "src": "services/node-one/index.js", "use": "@now/node@canary" },
    { "src": "services/node-two/index.js", "use": "@now/node" },
    { "src": "services/static-www/package.json", "use": "@now/static-build" }
  ],
  "routes": [
    { "src": "^/api/one", "dest": "/services/node-one" },
    { "src": "^/api/two", "dest": "/services/node-two" },
    { "src": "^/(.*)", "dest": "/services/static-www/$1" }
  ],
  "version": 2
}

package.json

{
  "author": "Pier-Luc Gendreau",
  "license": "MIT",
  "main": "index.js",
  "scripts": {
    "dev": "micro-dev"
  },
  "devDependencies": {
    "dotenv-safe": "^6.1.0",
    "micro": "^9.3.3",
    "micro-dev": "^3.0.0"
  }
}