`os.cpus()` returns empty array causing CLI generation to fail in some sandbox envs

[harvitronix]

Which packages are impacted by your issue?

@graphql-codegen/cli

Describe the bug

When running graphql-codegen in the CLI, the return value of os.cpus().length is passed into task.newListr. However, in some Sandbox environments, os.cpus() returns an empty array, resulting in passing the value 0 into the concurrent property of newListr. This in turn results in the generation hanging.

The Node JS documentation mentions:

os.cpus().length should not be used to calculate the amount of parallelism available to an application. Use os.availableParallelism() for this purpose.

Your Example Website or App

https://stackblitz.com/edit/github-ntbvauxb?file=package.json

Steps to Reproduce the Bug or Issue

1. In the StackBlitz example, I've added a shim to mimic the sandbox response for os.cpus()
2. Run yarn generate to see the error
3. Change the assignment in force-no-cpus.js to os.cpus = () => ["x"]; and re-run yarn generate and you'll see that generation now works, given that ["x"].length is equal to 1

Expected behavior

I expect that the concurrency value is set to a minimum of 1, and/or uses the newer availableParallelism() function.

Screenshots or Videos

No response

Platform

• OS: macOS in Codex CLI
• NodeJS: v20.19.2
• graphql version: 16.9.0
• @graphql-codegen/cli version: 5.0.7

Codegen Config File

No response

Additional context

I'm happy to submit a PR to address this, if it's agreeable to do so.