fetch openapi schema from encrypted source

fetch.ts

import { execSync } from 'node:child_process';
import fs from 'node:fs';
import path from 'node:path';

const url = process.env.OPENAPI_URL?.toString() ?? '';
const username = process.env.OPENAPI_USERNAME?.toString() ?? '';
const password = process.env.OPENAPI_PASSWORD?.toString() ?? '';
const projectRoot = execSync('git rev-parse --show-toplevel', {
  encoding: 'utf-8',
}).trim();

const main = async () => {
  const raw = await fetch(url, {
    headers: {
      Authorization:
        'Basic ' + Buffer.from(username + ':' + password).toString('base64'),
    },
  });
  const blob = await raw.blob();
  const buffer = Buffer.from(await blob.arrayBuffer());
  fs.writeFileSync(
    path.join(projectRoot, './scheme.json'),
    buffer,
    'utf-8'
  );
};

main().catch(console.error);

package.json

{
  "scripts": {
    "fetch-scheme": "dotenv -- tsx ./fetch.ts",
    "codegen": "openapi-typescript ./scheme.json -o ./api.d.ts",
    "generate": "npm run fetch-scheme && npm run codegen"
  }
}