renovatebot_renovate/lib/modules/datasource/custom/formats/json.ts

import { readLocalFile } from '../../../../util/fs';
import type { Http } from '../../../../util/http';
import type { CustomDatasourceFetcher } from './types';

export class JSONFetcher implements CustomDatasourceFetcher {
  async fetch(http: Http, registryURL: string): Promise<unknown> {
    const response = await http.getJsonUnchecked(registryURL);
    return response.body;
  }

  async readFile(registryURL: string): Promise<unknown> {
    const fileContent = await readLocalFile(registryURL, 'utf8');

    return JSON.parse(fileContent!);
  }
}