add licenses to the bundled output

package.json

@@ -44,6 +44,7 @@
     "eslint": "^8.46.0",
     "npm-run-all": "^4.1.5",
     "prettier": "^2.8.8",
+    "rollup-plugin-license": "^3.0.1",
     "typescript": "^5.1.6",
     "vite": "^4.4.8",
     "vitest": "^0.34.1",

vite.config.ts

@@ -1,5 +1,25 @@
 import { defineConfig } from "vite";
-import { resolve } from "path";
+import path, { resolve } from "path";
+import fs from "fs";
+import license from "rollup-plugin-license";
+
+const licenseText = fs.readFileSync(path.join(__dirname, "LICENSE"), "utf-8");
+const licenseTemplate = `
+Bundle of <%= pkg.name %>
+Generated: <%= moment().format('YYYY-MM-DD') %>
+Version: <%= pkg.version %>
+
+${licenseText}
+
+This bundle includes the following third-party libraries:
+<% _.forEach(dependencies, function (dependency) { %>
+  =====
+  <%= dependency.name %>@<%= dependency.version %> -- <%= dependency.license %>
+  -----
+
+  <%= dependency.licenseText %>
+<% }) %>
+`;
 
 export default defineConfig({
   build: {
@@ -8,5 +28,15 @@ export default defineConfig({
       entry: resolve(__dirname, "src/main.ts"),
       fileName: "my-kintone-customize",
     },
+    rollupOptions: {
+      plugins: [
+        license({
+          banner: {
+            commentStyle: "ignored",
+            content: licenseTemplate,
+          },
+        }),
+      ],
+    },
   },
 });