initial creation of mirror plugin

packages/plugin-mirror/rollup.config.js

@@ -0,0 +1,41 @@
+import babel from 'rollup-plugin-babel'
+import resolve from 'rollup-plugin-node-resolve'
+import commonjs from 'rollup-plugin-commonjs'
+import json from 'rollup-plugin-json'
+import minify from 'rollup-plugin-babel-minify'
+import peerDepsExternal from 'rollup-plugin-peer-deps-external'
+import { name, version, description, author, license, main, module } from './package.json'
+
+const output = [
+  {
+    file: main,
+    format: 'cjs',
+    sourcemap: true
+  }
+]
+if (typeof module !== 'undefined')
+  output.push({
+    file: module,
+    format: 'es',
+    sourcemap: true
+  })
+
+export default {
+  input: 'src/index.js',
+  output,
+  plugins: [
+    peerDepsExternal(),
+    resolve({ modulesOnly: true }),
+    commonjs(),
+    json(),
+    babel({
+      exclude: 'node_modules/**',
+      plugins: ['@babel/plugin-proposal-object-rest-spread']
+    }),
+    minify({
+      comments: false,
+      sourceMap: true,
+      banner: `/**\n * ${name} | v${version}\n * ${description}\n * (c) ${new Date().getFullYear()} ${author}\n * @license ${license}\n */`
+    })
+  ]
+}