test: fix vue.config.js test for appveyor

Author: yyx990803

packages/@vue/cli-service/__tests__/Service.spec.js

@@ -53,6 +53,7 @@ test('load project options from package.json', () => {
 })
 
 test('load project options from vue.config.js', () => {
+  process.env.VUE_CLI_SERVICE_CONFIG_PATH = `/vue.config.js`
   fs.writeFileSync('/vue.config.js', `module.exports = { lintOnSave: false }`)
   mockPkg({
     vue: {
@@ -61,6 +62,7 @@ test('load project options from vue.config.js', () => {
   })
   const service = createMockService()
   fs.unlinkSync('/vue.config.js')
+  delete process.env.VUE_CLI_SERVICE_CONFIG_PATH
   // vue.config.js has higher priority
   expect(service.projectOptions.lintOnSave).toBe(false)
 })

packages/@vue/cli-service/lib/Service.js

@@ -159,11 +159,13 @@ module.exports = class Service {
   loadProjectOptions (inlineOptions) {
     // vue.config.js
     let fileConfig, pkgConfig, resolved, resovledFrom
-    const configPath = path.resolve(this.context, 'vue.config.js')
+    const configPath = (
+      process.env.VUE_CLI_SERVICE_CONFIG_PATH ||
+      path.resolve(this.context, 'vue.config.js')
+    )
     if (fs.existsSync(configPath)) {
       try {
         fileConfig = require(configPath)
-        console.log(fileConfig)
         if (!fileConfig || typeof fileConfig !== 'object') {
           error(
             `Error loading ${chalk.bold('vue.config.js')}: should export an object.`