index.js

import ghGot from '../../platform/github/gh-got-wrapper';

const { logger } = require('../../logger');
const got = require('../../util/got');

module.exports = {
  getPreset,
  getDigest,
  getPkgReleases,
};

async function fetchJSONFile(repo, fileName) {
  const url = `https://api.github.com/repos/${repo}/contents/${fileName}`;
  const opts = {
    headers: {
      accept: global.appMode
        ? 'application/vnd.github.machine-man-preview+json'
        : 'application/vnd.github.v3+json',
    },
    json: true,
    hostType: 'github',
  };
  let res;
  try {
    res = await got(url, opts);
  } catch (err) {
    logger.debug(
      { statusCode: err.statusCodef },
      `Failed to retrieve ${fileName} from repo`
    );
    throw new Error('dep not found');
  }
  try {
    const content = Buffer.from(res.body.content, 'base64').toString();
    const parsed = JSON.parse(content);
    return parsed;
  } catch (err) {
    throw new Error('invalid preset JSON');
  }
}

async function getPreset(pkgName, presetName = 'default') {
  if (presetName === 'default') {
    try {
      const defaultJson = await fetchJSONFile(pkgName, 'default.json');
      return defaultJson;
    } catch (err) {
      if (err.message === 'dep not found') {
        logger.info('default.json preset not found - trying renovate.json');
        return fetchJSONFile(pkgName, 'renovate.json');
      }
      throw err;
    }
  }
  return fetchJSONFile(pkgName, `${presetName}.json`);
}

const cacheNamespace = 'datasource-github';
function getCacheKey(repo, type) {
  return `${repo}:${type}`;
}

/*
 * github.getDigest
 *
 * The `newValue` supplied here should be a valid tag for the docker image.
 *
 * This function will simply return the latest commit hash for the configured repository.
 */