The `cnpm login` in Continuous Integration. Because the private registry hosted by cnpm incapable of generating a `auth_token` after `npm login <registry>`.

cnpm-login.js

const cp = require('child_process');

// eslint-disable-next-line no-unused-vars
function inspect(...args) {
  return console.dir(...args, {
    showHidden: true,
    depth: Infinity,
    colors: true,
  });
}

const { NPM_USER, NPM_PWD, NPM_EMAIL } = process.env;

console.log(NPM_USER, NPM_PWD, NPM_EMAIL);

const login = cp.spawn('npm login', [
  '--registry=http://reg-npmjs.llsstaging.com',
  '--scope=@lls',
], {
  shell: true,
});

const promises = [];
const finished = [];

function buildInput(input) {
  const last = promises[promises.length - 1];

  const handleInput = () => {
    const currentHandler = () => {
      const currentPromise = new Promise((resolve) => {
        login.stdin.write(`${input}\n`);

        resolve();
      });

      Object.assign(handleInput, {
        promise: currentPromise,
        input,
      });

      return currentPromise;
    };

    if (last) {
      return last.promise.then(currentHandler);
    }

    return currentHandler();
  };

  promises.push(handleInput);

  return handleInput;
}

[NPM_USER, NPM_PWD, NPM_EMAIL].forEach((input) => {
  buildInput(input);
});

function handleData(data) {
  const result = data.toString();
  const reg = /Logged in/;

  process.stdout.write(`${result}\n`);

  if (reg.test(result)) {
    login.stdin.end();
  } else {
    const handler = promises.shift();

    handler();

    finished.push(handler);
  }
}

login.on('error', (err) => {
  process.stderr.write(err);
});

login.stdout.on('data', handleData);

login.stderr.on('data', (data) => {
  process.stderr.write(data);
});