feat: vue inspect that proxies to vue-cli-service

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

@@ -54,6 +54,14 @@ program
     require('../lib/invoke')(plugin, minimist(process.argv.slice(3)))
   })
 
+program
+  .command('inspect [paths...]')
+  .option('--mode <mode>')
+  .description('inspect the webpack config in a project with vue-cli-service')
+  .action((paths, cmd) => {
+    require('../lib/inspect')(paths, cmd.mode)
+  })
+
 program
   .command('serve [entry]')
   .description('serve a .js or .vue file in development mode with zero config')

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

@@ -0,0 +1,25 @@
+const fs = require('fs')
+const path = require('path')
+const execa = require('execa')
+const resolve = require('resolve')
+
+module.exports = function inspect (paths, mode) {
+  const cwd = process.cwd()
+  let servicePath
+  try {
+    servicePath = resolve.sync('@vue/cli-service', { cwd })
+  } catch (e) {
+    const { error } = require('@vue/cli-shared-utils')
+    error(`Failed to locate @vue/cli-service. Make sure you are in the right directory.`)
+    process.exit(1)
+  }
+  const binPath = path.resolve(servicePath, '../../bin/vue-cli-service.js')
+  if (fs.existsSync(binPath)) {
+    execa('node', [
+      binPath,
+      'inspect',
+      ...(mode ? ['--mode', mode] : []),
+      ...paths
+    ], { cwd, stdio: 'inherit' })
+  }
+}