Installer fails when system Node.js is below minimum version

[ericksoa]

Summary

install_nodejs() in install.sh short-circuits when any Node.js is found on PATH, regardless of version. If the system Node is below MIN_NODE_VERSION (22.16.0), the installer skips the nvm upgrade path, then ensure_supported_runtime() rejects the old version and exits.

This affects any environment with Node.js <22.16.0 pre-installed (e.g. GitHub Actions ubuntu-24.04 runners ship Node 20).

Reproduction

# On a system with Node.js v20.x
curl -fsSL https://www.nvidia.com/nemoclaw.sh | bash

[INFO]  Node.js found: v20.20.1
[ERROR] Unsupported runtime detected: Node.js v20.20.1, npm 10.8.2.
        NemoClaw requires Node.js >=22.16.0 and npm >=10.

Root cause

Two issues in install.sh:

1. install_nodejs() returns early when any node binary exists without checking its version
2. ensure_nvm_loaded() skips sourcing nvm.sh when any node is on PATH, so even if the nvm install path runs, Node 22 never gets activated in the parent shell

Fix

• Check the found Node version against MIN_NODE_VERSION before returning early
• Add --force flag to ensure_nvm_loaded() for the upgrade path