fix: silent failure when port is used

bin/vitepress.js

@@ -1,6 +1,7 @@
 #!/usr/bin/env node
 const chalk = require('chalk')
 const argv = require('minimist')(process.argv.slice(2))
+const portfinder = require('portfinder')
 
 console.log(chalk.cyan(`vitepress v${require('../package.json').version}`))
 console.log(chalk.cyan(`vite v${require('vite/package.json').version}`))
@@ -8,14 +9,15 @@ console.log(chalk.cyan(`vite v${require('vite/package.json').version}`))
 const command = argv._[0]
 
 if (!command || command === 'dev') {
-  const port = argv.port || 3000
   const root = command === 'dev' && argv._[1]
   if (root) {
     argv.root = root
   }
   require('../dist/node')
     .createServer(argv)
-    .then((server) => {
+    .then(async (server) => {
+      portfinder.basePort = parseInt(argv.port) || 3000
+      const port = await portfinder.getPortPromise()
       server.listen(port, () => {
         console.log(`listening at http://localhost:${port}`)
       })

package.json

@@ -68,6 +68,7 @@
     "markdown-it-emoji": "^1.4.0",
     "markdown-it-table-of-contents": "^0.4.4",
     "minimist": "^1.2.5",
+    "portfinder": "^1.0.26",
     "prismjs": "^1.20.0",
     "slash": "^3.0.0",
     "vite": "^0.18.0",

yarn.lock

@@ -492,6 +492,13 @@ astral-regex@^2.0.0:
   resolved "https://registry.yarnpkg.com/astral-regex/-/astral-regex-2.0.0.tgz#483143c567aeed4785759c0865786dc77d7d2e31"
   integrity sha512-Z7tMw1ytTXt5jqMcOP+OQteU1VuNK9Y02uuJtKQ1Sv69jXQKKg5cibLwGJow8yzZP+eAc18EmLGPal0bp36rvQ==
 
+async@^2.6.2:
+  version "2.6.3"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.6.3.tgz#d72625e2344a3656e3a3ad4fa749fa83299d82ff"
+  integrity sha512-zflvls11DCy+dQWzTW2dzuilv8Z5X/pjfmZOWba6TNIVDm+2UDaJmXSOXlasHKfNBs8oo3M0aT50fDEWfKZjXg==
+  dependencies:
+    lodash "^4.17.14"
+
 at-least-node@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/at-least-node/-/at-least-node-1.0.0.tgz#602cd4b46e844ad4effc92a8011a3c46e0238dc2"
@@ -1228,7 +1235,7 @@ dateformat@^3.0.0:
   resolved "https://registry.yarnpkg.com/dateformat/-/dateformat-3.0.3.tgz#a6e37499a4d9a9cf85ef5872044d62901c9889ae"
   integrity sha512-jyCETtSl3VMZMWeRo7iY1FL19ges1t55hMo5yaam4Jrsm5EPL89UQkoQRyiI+Yf4k8r2ZpdngkV8hr1lIdjb3Q==
 
-debug@^3.0.0, debug@^3.1.0:
+debug@^3.0.0, debug@^3.1.0, debug@^3.1.1:
   version "3.2.6"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.2.6.tgz#e83d17de16d8a7efb7717edbe5fb10135eee629b"
   integrity sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==
@@ -2496,7 +2503,7 @@ lodash.uniq@^4.5.0:
   resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
   integrity sha1-0CJTc662Uq3BvILklFM5qEJ1R3M=
 
-lodash@^4.17.13, lodash@^4.17.15:
+lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15:
   version "4.17.15"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
   integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
@@ -2722,7 +2729,7 @@ minimist@^1.1.3, minimist@^1.2.0, minimist@^1.2.5:
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.5.tgz#67d66014b66a6a8aaa0c083c5fd58df4e4e97602"
   integrity sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==
 
-mkdirp@~0.5.1:
+mkdirp@^0.5.1, mkdirp@~0.5.1:
   version "0.5.5"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.5.tgz#d91cefd62d1436ca0f41620e251288d420099def"
   integrity sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==
@@ -3134,6 +3141,15 @@ please-upgrade-node@^3.2.0:
   dependencies:
     semver-compare "^1.0.0"
 
+portfinder@^1.0.26:
+  version "1.0.26"
+  resolved "https://registry.yarnpkg.com/portfinder/-/portfinder-1.0.26.tgz#475658d56ca30bed72ac7f1378ed350bd1b64e70"
+  integrity sha512-Xi7mKxJHHMI3rIUrnm/jjUgwhbYMkp/XKEcZX3aG4BrumLpq3nmoQMX+ClYnDZnZ/New7IatC1no5RX0zo1vXQ==
+  dependencies:
+    async "^2.6.2"
+    debug "^3.1.1"
+    mkdirp "^0.5.1"
+
 postcss-calc@^7.0.1:
   version "7.0.2"
   resolved "https://registry.yarnpkg.com/postcss-calc/-/postcss-calc-7.0.2.tgz#504efcd008ca0273120568b0792b16cdcde8aac1"