Redirect debug output from required modules?

Hey all, I have a NodeJS-application in which I’m trying to redirect the debug output from modules I require. Not sure if I’m doing something wrong or what I want is not possible, so I thought I’d ask.

My situation is as follows:

App => has a custom debug log I want to redirect the logs to
|-- Module A => logs debug messages with debug("namespace-a")(message...)
    |-- Module B => logs debug messages with debug("namespace-b")(message...)

In the app, I am using the following code to replace the log function of the sub modules with my custom one:

process.env.DEBUG = "*";
const debugPackage = require("debug");
const debuggers = [debugPackage("namespace-a"), debugPackage("namespace-b")];
for (const d of debuggers) {
    d.log = (str) => customLogFunction(str);
}

However I’m not getting any redirected logs. Am I missing something?

[TooTallNate]

The problem is that when you do debugPackage("namespace-a") it creates a new debug instance every time, so it’s not going to affect another “namespace-a” instance that is in a different file.

Instead, you can overwrite the debugPackage.log function in the same way, which will affect all created debug instances.

debugPackage.log = customLogFunction;

[AlCalzone]

npm ls debug gives:

├─┬ iobroker.tradfri@0.3.0
│ ├── debug@3.1.0
│ └─┬ node-coap-client@0.4.4
│   ├── debug@3.1.0
│   └─┬ node-dtls-client@0.2.1
│     ├── debug@3.1.0
│     └─┬ node-aead-crypto@1.0.2
│       └─┬ node-pre-gyp@0.6.36
│         └─┬ tar-pack@3.4.0
│           └── debug@2.6.8

The first three (until dtls-client) are the ones I’m interested in. It should probably work then, since they are all @3.1.0. Or can the outdated version from tar-pack screw me here?