Nodejs app with npm start script - node.js

Question

I'm very new to nodejs.
In my dockerized environment, I want to provide appdynamics support to nodejs apps. This mandates every app to require the following as the first line in their app.
require("appdynamics").profile({
controllerHostName: '<controller host name>',
controllerPort: <controller port number>,
controllerSslEnabled: false, // Set to true if controllerPort is SSL
accountName: '<AppDynamics_account_name>',
accountAccessKey: '<AppDynamics_account_key>', //required
applicationName: 'your_app_name',
tierName: 'choose_a_tier_name',
nodeName: 'choose_a_node_name',
});
I plan to do that by providing a wrapper called appdynamics.js around the app's entry file. Details:
I run a script in my nodejs docker image to replace the entry file name in the app's package.json with "appdynamics.js", where appdynamics.js has the above appdynamics related require statement.
Ex : {scripts { "start" : "node server.js" }} will be replaced with
{scripts { "start" : "node appdynamics.js"}}
Then, i "require" the "server.js" inside appdynamics.js.
Invoke npm start.
My only concern is this:
If the package.json had something like scripts { "start" : "coffee server.coffee" }, my script will replace it to { "start" : "coffee appdynamics.js" }. and then my script will invoke npm start, which will error out.
What is the best way to solve this?
This is a follow up question to Use "coffee" instead of "node" command in production

Answer 1

Write a wrapper called appdynamics.coffee
Compile this wrapper to .js
Replace server.js with appdynamics.js and server.coffee with appdynamics.coffee
After this operations
{
"scripts": {
"start": "node server.js"
}
}
will be
{
"scripts": {
"start": "node appdynamics.js"
}
}
and
{
"scripts": {
"start": "coffee server.coffee"
}
}
will be
{
"scripts": {
"start": "coffee appdynamics.coffee"
}
}