Leverage terser to mangle/compress the generated js messages

Fix: #1085

Author: minggangw

package.json

@@ -18,15 +18,15 @@
     "rebuild": "npm run clean && node-gyp -j 16 rebuild",
     "rebuild:dev": "npm run clean && node-gyp -j 16 rebuild --debug",
     "generate-messages": "node scripts/generate_messages.js",
-    "generate-messages:dev": "node scripts/generate_messages.js --debug",
+    "generate-messages:dev": "node scripts/generate_messages.js --debug && npx --yes prettier --ignore-path --write generated/**/*.js",
     "generate-tsd-messages": "node scripts/generate_tsd.js",
-    "clean": "node-gyp clean && npx rimraf@6.0.1 ./generated",
+    "clean": "node-gyp clean && npx rimraf ./generated",
     "install": "npm run rebuild",
     "postinstall": "npm run generate-messages",
     "docs": "cd docs && make",
-    "test": "nyc node --expose-gc ./scripts/run_test.js && npx tsd",
+    "test": "nyc node --expose-gc ./scripts/run_test.js && tsd",
     "lint": "eslint && node ./scripts/cpplint.js",
-    "format": "clang-format -i -style=file ./src/*.cpp ./src/*.hpp && prettier --write \"{lib,rosidl_gen,rostsd_gen,rosidl_parser,types,example,test,scripts,benchmark,rostsd_gen}/**/*.{js,md,ts}\" ./*.{js,md,ts}",
+    "format": "clang-format -i -style=file ./src/*.cpp ./src/*.hpp && npx --yes prettier --write \"{lib,rosidl_gen,rostsd_gen,rosidl_parser,types,example,test,scripts,benchmark,rostsd_gen}/**/*.{js,md,ts}\" ./*.{js,md,ts}",
     "prepare": "husky",
     "coverage": "cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js"
   },
@@ -62,6 +62,7 @@
     "lint-staged": "^15.2.10",
     "mocha": "^11.0.2",
     "nyc": "^17.1.0",
+    "rimraf": "^6.0.1",
     "sinon": "^19.0.2",
     "tree-kill": "^1.2.2",
     "tsd": "^0.31.2",
@@ -79,7 +80,7 @@
     "is-close": "^1.3.3",
     "json-bigint": "^1.0.0",
     "nan": "^2.22.0",
-    "prettier": "^3.4.2",
+    "terser": "^5.39.0",
     "walk": "^2.3.15"
   },
   "husky": {

rosidl_gen/idl_generator.js

@@ -15,7 +15,7 @@
 'use strict';
 
 const dot = require('dot');
-const prettier = require('prettier');
+const { minify } = require('terser');
 const fse = require('fs-extra');
 const path = require('path');
 const parser = require('../rosidl_parser/rosidl_parser.js');
@@ -41,11 +41,12 @@ function removeEmptyLines(str) {
  * @param {string} code
  */
 async function writeGeneratedCode(dir, fileName, code) {
-  if (fileName.endsWith('.js')) {
-    code = await prettier.format(code, { parser: 'babel' });
+  let result = null;
+  if (!isDebug && fileName.endsWith('.js')) {
+    result = await minify(code);
   }
   await fse.mkdirs(dir);
-  await fse.writeFile(path.join(dir, fileName), code);
+  await fse.writeFile(path.join(dir, fileName), result ? result.code : code);
 }
 
 async function generateServiceJSStruct(