normalize-options.ts

import { joinPathFragments, names, readJson, Tree } from '@nrwl/devkit';
import { GeneratorOptions } from '../schema';
import { WorkspaceProjects } from './types';

export function normalizeOptions(
  tree: Tree,
  options: GeneratorOptions,
  projects: WorkspaceProjects
): GeneratorOptions {
  let npmScope = options.npmScope ?? options.name;
  if (npmScope) {
    npmScope = names(npmScope).fileName;
  } else if (projects.libs.length > 0) {
    // try get the scope from any library that have one
    for (const lib of projects.libs) {
      const { name } = readJson(
        tree,
        joinPathFragments(lib.config.root, 'package.json')
      );
      if (name.startsWith('@')) {
        npmScope = name.split('/')[0].substring(1);
        break;
      }
    }
  }

  if (!npmScope) {
    // use the name (scope if exists) in the root package.json
    const { name } = readJson(tree, 'package.json');
    npmScope = name.startsWith('@') ? name.split('/')[0].substring(1) : name;
  }

  return { ...options, npmScope };
}