fix: fix eslint cwd confusion during onCreateComplete hook execution

fixes vuejs#2554
fixes vuejs#3142

Author: haoqunjiang

packages/@vue/cli-plugin-eslint/__tests__/eslintPlugin.spec.js

@@ -139,3 +139,18 @@ test('should not throw when src folder is ignored by .eslintignore', async () =>
   // should not throw
   await run('vue-cli-service lint')
 })
+
+test('airbnb config + typescript + unit-mocha', async () => {
+  await create('eslint-airbnb-typescript', {
+    plugins: {
+      '@vue/cli-plugin-eslint': {
+        config: 'airbnb',
+        lintOn: 'commit'
+      },
+      '@vue/cli-plugin-typescript': {
+        classComponent: true
+      },
+      '@vue/cli-plugin-unit-mocha': {}
+    }
+  })
+})

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

@@ -56,7 +56,16 @@ module.exports = function lint (args = {}, api) {
     ? args._
     : defaultFilesToLint
 
+  // mock process.cwd before executing
+  // See:
+  // https://github.com/vuejs/vue-cli/issues/2554
+  // https://github.com/benmosher/eslint-plugin-import/issues/602
+  // https://github.com/eslint/eslint/issues/11218
+  const processCwd = process.cwd
+  process.cwd = () => cwd
   const report = engine.executeOnFiles(files)
+  process.cwd = processCwd
+
   const formatter = engine.getFormatter(args.format || 'codeframe')
 
   if (config.fix) {