fix: fix support for Node.js v8 and deprecate it

packages/@vue/cli/bin/vue.js

@@ -19,12 +19,15 @@ function checkNodeVersion (wanted, id) {
 
 checkNodeVersion(requiredVersion, '@vue/cli')
 
-if (semver.satisfies(process.version, '9.x')) {
-  console.log(chalk.red(
-    `You are using Node ${process.version}.\n` +
-    `Node.js 9.x has already reached end-of-life and will not be supported in future major releases.\n` +
-    `It's strongly recommended to use an active LTS version instead.`
-  ))
+const EOL_NODE_MAJORS = ['8.x', '9.x', '11.x', '13.x']
+for (const major of EOL_NODE_MAJORS) {
+  if (semver.satisfies(process.version, major)) {
+    console.log(chalk.red(
+      `You are using Node ${process.version}.\n` +
+      `Node.js ${major} has already reached end-of-life and will not be supported in future major releases.\n` +
+      `It's strongly recommended to use an active LTS version instead.`
+    ))
+  }
 }
 
 const fs = require('fs')

packages/@vue/cli/lib/Creator.js

@@ -28,6 +28,7 @@ const {
 const {
   chalk,
   execa,
+  semver,
 
   log,
   warn,
@@ -132,9 +133,10 @@ module.exports = class Creator extends EventEmitter {
       (hasYarn() ? 'yarn' : null) ||
       (hasPnpm3OrLater() ? 'pnpm' : 'npm')
     )
-    const pm = new PackageManager({ context, forcePackageManager: packageManager })
 
     await clearConsole()
+    const pm = new PackageManager({ context, forcePackageManager: packageManager })
+
     log(`✨  Creating project in ${chalk.yellow(context)}.`)
     this.emit('creation', { event: 'creating' })
 
@@ -173,6 +175,26 @@ module.exports = class Creator extends EventEmitter {
       'package.json': JSON.stringify(pkg, null, 2)
     })
 
+    // generate a .npmrc file for pnpm, to persist the `shamefully-flatten` flag
+    if (packageManager === 'pnpm') {
+      const pnpmConfig = hasPnpmVersionOrLater('4.0.0')
+        ? 'shamefully-hoist=true\n'
+        : 'shamefully-flatten=true\n'
+
+      await writeFileTree(context, {
+        '.npmrc': pnpmConfig
+      })
+    }
+
+    if (packageManager === 'yarn' && semver.satisfies(process.version, '8.x')) {
+      // Vue CLI 4.x should support Node 8.x,
+      // but some dependenices already bumped `engines` field to Node 10
+      // and Yarn treats `engines` field too strictly
+      await writeFileTree(context, {
+        '.yarnrc': '# Hotfix for Node 8.x\n--install.ignore-engines true\n'
+      })
+    }
+
     // intilaize git repository before installing deps
     // so that vue-cli-service can setup git hooks.
     const shouldInitGit = this.shouldInitGit(cliOptions)
@@ -235,17 +257,6 @@ module.exports = class Creator extends EventEmitter {
       })
     }
 
-    // generate a .npmrc file for pnpm, to persist the `shamefully-flatten` flag
-    if (packageManager === 'pnpm') {
-      const pnpmConfig = hasPnpmVersionOrLater('4.0.0')
-        ? 'shamefully-hoist=true\n'
-        : 'shamefully-flatten=true\n'
-
-      await writeFileTree(context, {
-        '.npmrc': pnpmConfig
-      })
-    }
-
     // commit initial state
     let gitCommitFailed = false
     if (shouldInitGit) {

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

@@ -106,6 +106,22 @@ class PackageManager {
       this.bin = loadOptions().packageManager || (hasYarn() ? 'yarn' : hasPnpm3OrLater() ? 'pnpm' : 'npm')
     }
 
+    if (this.bin === 'npm') {
+      // npm doesn't support package aliases until v6.9
+      const MIN_SUPPORTED_NPM_VERSION = '6.9.0'
+      const npmVersion = stripAnsi(execa.sync('npm', ['--version']).stdout)
+
+      if (semver.lt(npmVersion, MIN_SUPPORTED_NPM_VERSION)) {
+        warn(
+          'You are using an outdated version of NPM.\n' +
+          'there may be unexpected errors during installation.\n' +
+          'Please upgrade your NPM version.'
+        )
+
+        this.needsNpmInstallFix = true
+      }
+    }
+
     if (!SUPPORTED_PACKAGE_MANAGERS.includes(this.bin)) {
       log()
       warn(
@@ -313,6 +329,28 @@ class PackageManager {
       }
     }
 
+    if (this.needsNpmInstallFix) {
+      // if npm 5, split into several `npm add` calls
+      // see https://github.com/vuejs/vue-cli/issues/5800#issuecomment-675199729
+      const pkg = resolvePkg(this.context)
+      if (pkg.dependencies) {
+        const deps = Object.entries(pkg.dependencies).map(([dep, range]) => `${dep}@${range}`)
+        await this.runCommand('install', deps)
+      }
+
+      if (pkg.devDependencies) {
+        const devDeps = Object.entries(pkg.devDependencies).map(([dep, range]) => `${dep}@${range}`)
+        await this.runCommand('install', [...devDeps, '--save-dev'])
+      }
+
+      if (pkg.optionalDependencies) {
+        const devDeps = Object.entries(pkg.devDependencies).map(([dep, range]) => `${dep}@${range}`)
+        await this.runCommand('install', [...devDeps, '--save-optional'])
+      }
+
+      return
+    }
+
     return await this.runCommand('install')
   }