find-node-modules/cz-cli/node_modules/@semantic-release/npm/lib/set-npmrc-auth.js

Return an array of all parent node_modules directories

const path = require('path');
const rc = require('rc');
const {outputFile, readFile} = require('fs-extra');
const getAuthToken = require('registry-auth-token');
const nerfDart = require('nerf-dart');
const AggregateError = require('aggregate-error');
const getError = require('./get-error');

module.exports = async (
  npmrc,
  registry,
  {cwd, env: {NPM_TOKEN, NPM_CONFIG_USERCONFIG, NPM_USERNAME, NPM_PASSWORD, NPM_EMAIL}, logger}
) => {
  logger.log('Verify authentication for registry %s', registry);
  const {configs, ...rcConfig} = rc(
    'npm',
    {registry: 'https://registry.npmjs.org/'},
    {config: NPM_CONFIG_USERCONFIG || path.resolve(cwd, '.npmrc')}
  );

  if (configs) {
    logger.log('Reading npm config from %s', configs.join(', '));
  }

  const currentConfig = configs ? (await Promise.all(configs.map(config => readFile(config)))).join('\n') : '';

  if (getAuthToken(registry, {npmrc: rcConfig})) {
    await outputFile(npmrc, currentConfig);
    return;
  }

  if (NPM_USERNAME && NPM_PASSWORD && NPM_EMAIL) {
    await outputFile(
      npmrc,
      `${currentConfig ? `${currentConfig}\n` : ''}_auth = \${LEGACY_TOKEN}\nemail = \${NPM_EMAIL}`
    );
    logger.log(`Wrote NPM_USERNAME, NPM_PASSWORD and NPM_EMAIL to ${npmrc}`);
  } else if (NPM_TOKEN) {
    await outputFile(
      npmrc,
      `${currentConfig ? `${currentConfig}\n` : ''}${nerfDart(registry)}:_authToken = \${NPM_TOKEN}`
    );
    logger.log(`Wrote NPM_TOKEN to ${npmrc}`);
  } else {
    throw new AggregateError([getError('ENONPMTOKEN', {registry})]);
  }
};