code: function resolvePath (moduleName, relativePath)
  {
    if (! moduleName) {
      return null;
    }
  
    if (! relativePath) {
      return null;
    }
  
    const mainPath = require.resolve(moduleName);
    if (! mainPath) {
      return null;
    }
  
    const rootLocations = [];
    const dirs = mainPath.split(path.sep);
    let lastSegment = dirs.pop();
    while (lastSegment) {
      const location = dirs.concat(['package.json']).join(path.sep);
      rootLocations.push(location);
      lastSegment = dirs.pop();
    }
  
    for(const location of rootLocations) {
      if (fs.existsSync(location)) {
        const cli = path.resolve(path.dirname(location), relativePath);
        if (fs.existsSync(cli)) {
          return cli;
        }
      }
    }
  
    return null;
  }
docs: Resolves a relative path in the context of a module into an absolute path
  
  @param {string} moduleName
  @param {string} relativePath the relative path inside the module
  @returns {string|null}