add config ui

Author: cruzdanilo

ui.js

@@ -0,0 +1,40 @@
+const fs = require('fs');
+const path = require('path');
+
+function getConfigData(data) {
+  return (data.vue && data.vue.pluginOptions && data.vue.pluginOptions.netlify) || {};
+}
+
+module.exports = api => api.describeConfig({
+  id: 'com.netlify.netlify-lambda',
+  name: 'Netlify configuration',
+  description: 'Configure Netlify Functions',
+  link: 'https://github.com/netlify/vue-cli-plugin-netlify-lambda',
+  files: {
+    vue: {
+      js: ['vue.config.js'],
+    },
+  },
+  onRead({ data, cwd }) {
+    return {
+      prompts: [
+        {
+          name: 'webpackConfig',
+          type: 'input',
+          default: null,
+          value: getConfigData(data).webpackConfig,
+          validate: input => fs.existsSync(path.join(cwd, input)),
+          message: 'Webpack config module',
+          description: 'Additional webpack configuration',
+        },
+      ],
+    };
+  },
+  async onWrite({ api: writeApi, prompts }) {
+    const result = {};
+    for (const prompt of prompts) {
+      result[`pluginOptions.netlify.${prompt.id}`] = await writeApi.getAnswer(prompt.id);
+    }
+    writeApi.setData('vue', result);
+  },
+});