From 0f11b6adabd6937beb87a86cbc4eb1ada23b7614 Mon Sep 17 00:00:00 2001
From: Haoqun Jiang <haoqunjiang@gmail.com>
Date: Mon, 18 May 2020 21:20:46 +0800
Subject: [PATCH] fix: allow specifying plugin version when calling `vue add`

fixes #4700
---
 packages/@vue/cli/lib/add.js | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/packages/@vue/cli/lib/add.js b/packages/@vue/cli/lib/add.js
index 6001baf81e..d0dd93f917 100644
--- a/packages/@vue/cli/lib/add.js
+++ b/packages/@vue/cli/lib/add.js
@@ -17,7 +17,7 @@ const {
 } = require('@vue/cli-shared-utils')
 const confirmIfGitDirty = require('./util/confirmIfGitDirty')
 
-async function add (pluginName, options = {}, context = process.cwd()) {
+async function add (pluginToAdd, options = {}, context = process.cwd()) {
   if (!(await confirmIfGitDirty(context))) {
     return
   }
@@ -26,14 +26,21 @@ async function add (pluginName, options = {}, context = process.cwd()) {
   const servicePkg = loadModule('@vue/cli-service/package.json', context)
   if (servicePkg && semver.satisfies(servicePkg.version, '3.x')) {
     // special internal "plugins"
-    if (/^(@vue\/)?router$/.test(pluginName)) {
+    if (/^(@vue\/)?router$/.test(pluginToAdd)) {
       return addRouter(context)
     }
-    if (/^(@vue\/)?vuex$/.test(pluginName)) {
+    if (/^(@vue\/)?vuex$/.test(pluginToAdd)) {
       return addVuex(context)
     }
   }
 
+  const pluginRe = /^(@?[^@]+)(?:@(.+))?$/
+  const [
+    // eslint-disable-next-line
+    _skip,
+    pluginName,
+    pluginVersion
+  ] = pluginToAdd.match(pluginRe)
   const packageName = resolvePluginId(pluginName)
 
   log()
@@ -41,9 +48,11 @@ async function add (pluginName, options = {}, context = process.cwd()) {
   log()
 
   const pm = new PackageManager({ context })
-  const { latestMinor } = await getVersions()
 
-  if (isOfficialPlugin(packageName)) {
+  if (pluginVersion) {
+    await pm.add(`${packageName}@${pluginVersion}`)
+  } else if (isOfficialPlugin(packageName)) {
+    const { latestMinor } = await getVersions()
     await pm.add(`${packageName}@~${latestMinor}`)
   } else {
     await pm.add(packageName, { tilde: true })