fix: should tolerate cli version check error (#4741)

* fix: should tolerate cli version check error

* fix: add the error message after the DEBUG indicator

packages/@vue/cli/lib/util/clearConsole.js

@@ -26,8 +26,7 @@ async function getInstallationCommand () {
 }
 
 exports.generateTitle = async function (checkUpdate) {
-  const { current, latest } = await getVersions()
-
+  const { current, latest, error } = await getVersions()
   let title = chalk.bold.blue(`Vue CLI v${current}`)
 
   if (process.env.VUE_CLI_TEST) {
@@ -36,7 +35,12 @@ exports.generateTitle = async function (checkUpdate) {
   if (process.env.VUE_CLI_DEBUG) {
     title += ' ' + chalk.magenta.bold('DEBUG')
   }
-  if (checkUpdate && semver.gt(latest, current)) {
+
+  if (error) {
+    title += '\n' + chalk.red('Failed to check for updates')
+  }
+
+  if (checkUpdate && !error && semver.gt(latest, current)) {
     if (process.env.VUE_CLI_API_MODE) {
       title += chalk.green(` 🌟️ New version available: ${latest}`)
     } else {

packages/@vue/cli/lib/util/getVersions.js

@@ -26,20 +26,28 @@ module.exports = async function getVersions () {
   const cached = latestVersion
   const daysPassed = (Date.now() - lastChecked) / (60 * 60 * 1000 * 24)
 
+  let error
   if (daysPassed > 1) {
     // if we haven't check for a new version in a day, wait for the check
     // before proceeding
-    latest = await getAndCacheLatestVersion(cached, includePrerelease)
+    try {
+      latest = await getAndCacheLatestVersion(cached, includePrerelease)
+    } catch (e) {
+      latest = cached
+      error = e
+    }
   } else {
     // Otherwise, do a check in the background. If the result was updated,
     // it will be used for the next 24 hours.
-    getAndCacheLatestVersion(cached, includePrerelease)
+    // don't throw to interrupt the user if the background check failed
+    getAndCacheLatestVersion(cached, includePrerelease).catch(() => {})
     latest = cached
   }
 
   return (sessionCached = {
     current: local,
-    latest
+    latest,
+    error
   })
 }