fix(cli-plugin-eslint): Resolve proper ESLint package (#2560)

Author: michalsnik

packages/@vue/cli-plugin-eslint/index.js

@@ -3,6 +3,9 @@ const path = require('path')
 module.exports = (api, options) => {
   if (options.lintOnSave) {
     const extensions = require('./eslintOptions').extensions(api)
+    const { loadModule } = require('@vue/cli-shared-utils')
+    const cwd = api.getCwd()
+    const eslintPkg = loadModule('eslint/package.json', cwd, true)
 
     // eslint-loader doesn't bust cache when eslint config changes
     // so we have to manually generate a cache identifier that takes the config
@@ -11,7 +14,7 @@ module.exports = (api, options) => {
       'eslint-loader',
       {
         'eslint-loader': require('eslint-loader/package.json').version,
-        'eslint': require('eslint/package.json').version
+        'eslint': eslintPkg.version
       },
       [
         '.eslintrc.js',
@@ -42,7 +45,7 @@ module.exports = (api, options) => {
               cacheIdentifier,
               emitWarning: options.lintOnSave !== 'error',
               emitError: options.lintOnSave === 'error',
-              formatter: require('eslint/lib/formatters/codeframe')
+              formatter: loadModule('eslint/lib/formatters/codeframe', cwd, true)
             })
     })
   }

packages/@vue/cli-plugin-eslint/lint.js

@@ -28,8 +28,8 @@ const defaultFilesToLint = [
 module.exports = function lint (args = {}, api) {
   const path = require('path')
   const cwd = api.resolve('.')
-  const { CLIEngine } = require('eslint')
-  const { log, done, exit, chalk } = require('@vue/cli-shared-utils')
+  const { log, done, exit, chalk, loadModule } = require('@vue/cli-shared-utils')
+  const { CLIEngine } = loadModule('eslint', cwd, true)
   const extensions = require('./eslintOptions').extensions(api)
 
   const argsConfig = normalizeConfig(args)