fix(ui): wrong context for webpack config, closes 1611

packages/@vue/cli-ui/src/graphql-api/connectors/plugins.js

@@ -8,7 +8,7 @@ const {
   getPluginLink
 } = require('@vue/cli-shared-utils')
 const getPackageVersion = require('@vue/cli/lib/util/getPackageVersion')
-const { resolveModule, loadModule } = require('@vue/cli/lib/util/module')
+const { resolveModule, loadModule, clearModule } = require('@vue/cli/lib/util/module')
 const {
   progress: installProgress,
   installPackage,
@@ -340,6 +340,9 @@ function runInvoke (id, context) {
       status: 'plugin-invoke',
       args: [id]
     })
+
+    clearModule('@vue/cli-service/webpack.config.js', cwd.get())
+
     currentPluginId = id
     // Allow plugins that don't have a generator
     if (resolveModule(`${id}/generator`, cwd.get())) {

packages/@vue/cli-ui/src/graphql-api/connectors/projects.js

@@ -7,6 +7,7 @@ const { getFeatures } = require('@vue/cli/lib/util/features')
 const { defaults } = require('@vue/cli/lib/options')
 const { toShortPluginId } = require('@vue/cli-shared-utils')
 const { progress: installProgress } = require('@vue/cli/lib/util/installDeps')
+const { clearModule } = require('@vue/cli/lib/util/module')
 // Connectors
 const progress = require('./progress')
 const cwd = require('./cwd')
@@ -250,6 +251,9 @@ async function create (input, context) {
     cwd.set(targetDir, context)
     creator.context = targetDir
 
+    process.env.VUE_CLI_CONTEXT = targetDir
+    clearModule('@vue/cli-service/webpack.config.js', targetDir)
+
     const inCurrent = input.folder === '.'
     const name = inCurrent ? path.relative('../', process.cwd()) : input.folder
     creator.name = name

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

@@ -52,6 +52,13 @@ exports.loadModule = function (request, context, force = false) {
   }
 }
 
+exports.clearModule = function (request, context) {
+  const resolvedPath = exports.resolveModule(request, context)
+  if (resolvedPath) {
+    clearRequireCache(resolvedPath)
+  }
+}
+
 function clearRequireCache (id, map = new Map()) {
   const module = require.cache[id]
   if (module) {