Insert the message metadata in JSON only for debug (#1010)

Fix: #1007

Author: minggangw

package.json

@@ -18,6 +18,7 @@
     "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",
     "clean": "node-gyp clean && rimraf ./generated",
     "install": "npm run rebuild",
     "postinstall": "npm run generate-messages",

rosidl_gen/generator.json

@@ -1,6 +1,6 @@
 {
   "name": "rosidl-generator",
-  "version": "0.3.9",
+  "version": "0.3.10",
   "description": "Generate JavaScript object from ROS IDL(.msg) files",
   "main": "index.js",
   "authors": [

rosidl_gen/idl_generator.js

@@ -23,6 +23,7 @@ const DistroUtils = require('../lib/distro.js');
 
 dot.templateSettings.strip = false;
 dot.log = process.env.RCLNODEJS_LOG_VERBOSE || false;
+const isDebug = !!process.argv.find((arg) => arg === '--debug');
 const dots = dot.process({
   path: path.join(__dirname, '../rosidl_gen/templates'),
 });
@@ -119,6 +120,7 @@ async function generateServiceEventJSStruct(msgInfo, dir) {
       messageInfo: msgInfo,
       spec: spec,
       json: JSON.stringify(spec, null, '  '),
+      isDebug: isDebug,
     })
   );
 
@@ -148,6 +150,7 @@ function generateMessageJSStructFromSpec(messageInfo, dir, spec) {
       messageInfo: messageInfo,
       spec: spec,
       json: JSON.stringify(spec, null, '  '),
+      isDebug: isDebug,
     })
   );
   return writeGeneratedCode(dir, fileName, generatedCode);

rosidl_gen/templates/message.dot

@@ -863,7 +863,9 @@ Object.defineProperty({{=objectWrapper}}, "{{=c.name}}", {value: {{=c.value}}, w
 
 module.exports = {{=objectWrapper}};
 
+{{? it.isDebug}}
 /*
  * The following is the original spec object coming from parser:
 {{=it.json}}
 */
+{{?}}