fix: fix eslint cwd confusion during onCreateComplete hook execution (#3212)

* fix: fix eslint cwd confusion during onCreateComplete hook execution

fixes #2554
fixes #3142

* fix: do not mock process.cwd during invoking

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

@@ -163,3 +163,18 @@ test('append to existing .editorconfig', async () => {
   expect(editorconfig).toMatch('root = true')
   expect(editorconfig).toMatch('[*.{js,jsx,ts,tsx,vue}]')
 })
+
+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 +56,18 @@ 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
+  if (!api.invoking) {
+    process.cwd = () => cwd
+  }
   const report = engine.executeOnFiles(files)
+  process.cwd = processCwd
+
   const formatter = engine.getFormatter(args.format || 'codeframe')
 
   if (config.fix) {