`nx graph --file=stdout` includes warning messages

[Brodzko]

Current Behavior

When running nx graph --file=stdout, any additional Nx warnings are included in the output. This is in contrast to nx graph --file=output.json where they are correctly stripped.

Here's what the ouput looks like now if I try to run it with a wrong node version:

WARN  Unsupported engine: wanted: {"node":">=22"} (current: {"node":"v20.14.0","pnpm":"9.15.5"})
{
  "graph": {
    "nodes": {
...

This is a problem when I want to do further processing on the output, e.g. using jq:

nx graph --file=stdout | jq '.' now throws jq: parse error: Invalid numeric literal at line 1, column 11

Expected Behavior

Standard output only contains the resulting JSON, same as when outputting to file

GitHub Repo

No response

Steps to Reproduce

1. Ensure Nx throws a warning (e.g. specify different node version in package.json engine section
2. Run nx graph --file=stdout
3. Warning is now included in output, making it invalid JSON

Nx Report

Node           : 20.14.0
OS             : darwin-arm64
Native Target  : aarch64-macos
pnpm           : 9.15.5

nx                     : 20.7.2
@nx/js                 : 20.7.2
@nx/eslint             : 20.7.2
@nx/workspace          : 20.7.2
@nx/cypress            : 20.7.2
@nx/devkit             : 20.7.2
@nx/module-federation  : 20.7.2
@nx/react              : 20.7.2
@nx/storybook          : 20.7.2
@nx/web                : 19.8.14
typescript             : 5.8.2
---------------------------------------
Cache Usage: 33.32 MB / 46.04 GB
---------------------------------------
The following packages should match the installed version of nx
  - @nx/web@19.8.14

To fix this, run `nx migrate nx@20.7.2`

Failure Logs

Package Manager Version

No response

Operating System

• macOS
• Linux
• Windows
• Other (Please specify)

Additional Information

No response

[AgentEnder]

This warning is coming not from Nx itself, but rather some combination of node, npx etc. Its printed before Nx is invoked, and as such there's not anything we can do to prevent it.