feat: Add support for web auth, utilizing code from npm-profile

lib/utils/otplease.js

@@ -8,6 +8,23 @@ async function otplease (npm, opts, fn) {
 
     const isBackwardsCompatibleOTP = err.code === 'E401' && /one-time pass/.test(err.body)
     const isClassicOTP = err.code === 'EOTP'
+    const isWebOTP = err.code === 'EOTP' && err.body.authUrl && err.body.doneUrl
+
+    if (isWebOTP) {
+      const webAuth = require('./web-auth')
+      const openUrlPrompt = require('./open-url-prompt')
+
+      const openerPromise = (url, emitter) =>
+        openUrlPrompt(
+          npm,
+          url,
+          'Authenticate your account at',
+          'Press ENTER to open in the browser...',
+          emitter
+        )
+      const otp = await webAuth(openerPromise, err.body.authUrl, err.body.doneUrl, opts)
+      return await fn({ ...opts, otp })
+    }
 
     if (isClassicOTP || isBackwardsCompatibleOTP) {
       const readUserInfo = require('./read-user-info.js')

lib/utils/web-auth.js

@@ -0,0 +1,22 @@
+const EventEmitter = require('events')
+const { webAuthCheckLogin } = require('npm-profile')
+
+function webAuth (opener, initialUrl, doneUrl, opts) {
+  const doneEmitter = new EventEmitter()
+
+  const openPromise = opener(initialUrl, doneEmitter)
+  const webAuthCheckPromise = webAuthCheckLogin(doneUrl, { ...opts, cache: false })
+    .then(authResult => {
+      // cancel open prompt if it's present
+      doneEmitter.emit('abort')
+
+      return authResult
+    })
+
+  return Promise.all([openPromise, webAuthCheckPromise]).then(
+    // pick the auth result and pass it along
+    ([, authResult]) => authResult
+  )
+}
+
+module.exports = webAuth