fix: do not exit with 1 on lint warnings (fix #872)

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

@@ -1,8 +1,10 @@
 module.exports = function lint (args = {}, api) {
+  const path = require('path')
+  const chalk = require('chalk')
   const cwd = api.resolve('.')
   const { CLIEngine } = require('eslint')
   const options = require('./eslintOptions')(api)
-  const { done } = require('@vue/cli-shared-utils')
+  const { log, done } = require('@vue/cli-shared-utils')
 
   const files = args._ && args._.length ? args._ : ['src', 'tests', '*.js']
   if (args['no-fix']) {
@@ -21,10 +23,24 @@ module.exports = function lint (args = {}, api) {
     CLIEngine.outputFixes(report)
   }
 
-  if (!report.errorCount && !report.warningCount) {
+  if (!report.errorCount) {
     if (!args.silent) {
       const hasFixed = report.results.some(f => f.output)
-      done(hasFixed ? `All lint errors auto-fixed.` : `No lint errors found!`)
+      if (hasFixed) {
+        log(`The following files have been auto-fixed:`)
+        log()
+        report.results.forEach(f => {
+          if (f.output) {
+            log(`  ${chalk.blue(path.relative(cwd, f.filePath))}`)
+          }
+        })
+        log()
+      }
+      if (report.warningCount) {
+        console.log(formatter(report.results))
+      } else {
+        done(hasFixed ? `All lint errors auto-fixed.` : `No lint errors found!`)
+      }
     }
   } else {
     console.log(formatter(report.results))