feat(rollup.config): improve tree-shaking using preserveModules: true

package.json

@@ -79,7 +79,6 @@
   "devDependencies": {
     "@rollup/plugin-commonjs": "^26.0.1",
     "@rollup/plugin-node-resolve": "^15.2.3",
-    "@rollup/plugin-terser": "^0.4.4",
     "@rollup/plugin-typescript": "^11.1.6",
     "@trivago/prettier-plugin-sort-imports": "^4.3.0",
     "@types/inquirer": "^8.2.5",
@@ -106,4 +105,4 @@
     "src"
   ],
   "private": true
-}
+}

rollup.config.js

@@ -1,35 +1,40 @@
+const path = require("path");
 const typescript = require("@rollup/plugin-typescript");
-const terser = require("@rollup/plugin-terser");
 const nodeResolve = require("@rollup/plugin-node-resolve");
 const commomnjs = require("@rollup/plugin-commonjs");
 
-const outDir = "lib";
-
 module.exports = {
   input: "./src/index.ts",
   output: {
-    dir: outDir,
+    dir: "./lib",
     format: "esm",
-    entryFileNames: "[name].mjs",
     sourcemap: true,
+    entryFileNames: (chunkInfo) => {
+      const ext = `mjs`
+      const externalDir = `_external`;
+      const nodeModulesDir = `node_modules`;
+      if (chunkInfo.name.includes(nodeModulesDir)) {
+        /** replace / to _ and the last part of the path is the file name */
+        const nameSplit = chunkInfo.name.split('/')
+        const chunkName = path.join(externalDir, nameSplit.slice(0, -1).join('_'), nameSplit.at(-1))
+        console.table({
+          before: chunkInfo.name,
+          after: chunkName,
+        })
+        return `${chunkName}.${ext}`;
+      }
+      return `[name].${ext}`;
+    },
+    preserveModules: true,
+    preserveModulesRoot: "src",
   },
   plugins: [
     nodeResolve(),
     commomnjs(),
     typescript({
       tsconfig: "tsconfig.json",
-      module: "ES2020",
-      target: "ES2020",
-    }),
-    terser({
-      format: {
-        comments: "some",
-        beautify: true,
-        ecma: "2020",
-      },
-      compress: false,
-      mangle: false,
-      module: true,
+      module: "ESNext",
+      target: "ESNext",
     }),
   ],
 };