resolve.js

#!/usr/bin/env node
(async () => {
  var url = process.argv[2];
  var result = await get(url);
  var resolved = await resolve(result);
  console.log(resolved);
})();

// todo handle
// for i in $(curl -sL 'https://json-schema.org/draft/2020-12/schema' | jq '.allOf[]["$ref"]' -r) ; do curl -sL "https://json-schema.org/draft/2020-12/$i" ; done
async function resolve(schema) {
  for (var key in schema) {
    if (key === '$ref' && typeof schema[key] === 'string') {
      schema[key] = await get(schema[key])
    } else if (schema[key] && typeof schema[key] === 'object') {
      schema[key] = await resolve(schema[key])
    }
  }
  return schema;
}

async function get(url) {
  return await fetch(url)
    .then(r => r.json())
    .catch(e => url)
    ;
}