vue-cli build will repeat new Service when use eslint-config-standard

[dtcz]

Version

4.4.4

Reproduction link

https://github.com/dtcz/vue-cli-eslint-bug-report

Environment info

Environment Info:

  System:
    OS: Windows 7 6.1.7601
    CPU: (2) x64 Intel(R) Xeon(R) CPU E5-2650 v4 @ 2.20GHz
  Binaries:
    Node: 10.15.1 - C:\ThsSoftware\nodejs\node.EXE
    Yarn: 1.22.4 - ~\AppData\Roaming\npm\yarn.CMD
    npm: 6.4.1 - C:\ThsSoftware\nodejs\npm.CMD
  npmPackages:
    @vue/babel-helper-vue-jsx-merge-props:  1.0.0
    @vue/babel-plugin-transform-vue-jsx:  1.1.2
    @vue/babel-preset-app:  4.4.4
    @vue/babel-preset-jsx:  1.1.2
    @vue/babel-sugar-functional-vue:  1.1.2
    @vue/babel-sugar-inject-h:  1.1.2
    @vue/babel-sugar-v-model:  1.1.2
    @vue/babel-sugar-v-on:  1.1.2
    @vue/cli-overlay:  4.4.4
    @vue/cli-plugin-babel: ~4.4.0 => 4.4.4
    @vue/cli-plugin-eslint: ~4.4.0 => 4.4.4
    @vue/cli-plugin-router:  4.4.4
    @vue/cli-plugin-typescript: ~4.4.0 => 4.4.4
    @vue/cli-plugin-vuex:  4.4.4
    @vue/cli-service: ~4.4.0 => 4.4.4
    @vue/cli-shared-utils:  4.4.4
    @vue/component-compiler-utils:  3.1.2
    @vue/eslint-config-standard: ^5.1.2 => 5.1.2
    @vue/eslint-config-typescript: ^5.0.2 => 5.0.2
    @vue/preload-webpack-plugin:  1.1.1
    @vue/web-component-wrapper:  1.2.0
    eslint-plugin-vue: ^6.2.2 => 6.2.2
    typescript: ~3.9.3 => 3.9.5
    vue: ^2.6.11 => 2.6.11
    vue-class-component: ^7.2.3 => 7.2.3
    vue-eslint-parser:  7.1.0
    vue-hot-reload-api:  2.3.4
    vue-loader:  15.9.2
    vue-property-decorator: ^8.4.2 => 8.5.0
    vue-style-loader:  4.1.2
    vue-template-compiler: ^2.6.11 => 2.6.11
    vue-template-es2015-compiler:  1.9.1
  npmGlobalPackages:
    @vue/cli: Not Found

Steps to reproduce

git clone https://github.com/dtcz/vue-cli-eslint-bug-report.git
cd vue-cli-eslint-bug-report
npm install
npm run build:2

What is expected?

promise.finally is packed

What is actually happening?

can't find promise.finally in report.html

---

in this file

vue-cli/packages/@vue/cli-service/webpack.config.js

Lines 1 to 12 in a41cac2

	// this file is for cases where we need to access the
	// webpack config as a file when using CLI commands.
	let service = process.VUE_CLI_SERVICE
	if (!service || process.env.VUE_CLI_API_MODE) {
	const Service = require('./lib/Service')
	service = new Service(process.env.VUE_CLI_CONTEXT || process.cwd())
	service.init(process.env.VUE_CLI_MODE || process.env.NODE_ENV)
	}
	module.exports = service.resolveWebpackConfig()

at line 5 insert following debug

console.log(!service)

will see true which cause program repeat new Service()

[dtcz]

link to #5508
i think my pr 5544 should rethink,
maybe the following is better

if (args.entry && !options.pages) {
    config.entryPoints
      .clear()

    config
      .entry('app')
      .add(api.resolve(args.entry))
}
return api.resolveWebpackConfig(config)

[dtcz]

@sodatea
After careful debugging, I consider it cause by parallel options, because sub worker's process.VUE_CLI_SERVICE is null.
when I set parallel to false
and fix @vue/cli-service/lib/commands/build/resolveAppConfig.js with

module.exports = (api, args, options) => {
  // respect inline entry
  if (args.entry && !options.pages) {
    api.chainWebpack(config => {
      config.entryPoints
        .clear()

      config
        .entry('app')
        .add(api.resolve(args.entry))
    })
  }

  const config = api.resolveChainableWebpackConfig()
  // ... some other codes
  return api.resolveWebpackConfig(config)
}

It's work fine.
this isn't a eslint bug, just trigger this case by chance.
maybe the following codes
https://github.com/vuejs/eslint-config-standard/blob/4b13e72574e2c42061220265e510ebfb3576dfea/index.js#L7-L11