How to update node version on Google Cloud Shell

I'm using Google Cloud Shell, and the default node version is 12.14.1. Is there an easy way to update the node version to 14.x or 16.x?

node seems to be installed with nvm

$ which node
/usr/local/nvm/versions/node/v12.14.1/bin/node

Solution

nvm isn't a file, but a bash function and is exposed via /google/devshell/bashrc.google.d/nvm.

This script is sourced by default by /google/devshell/bashrc.google. However, I inadvertently commented out these lines, which disabled it

if [ -f "/google/devshell/bashrc.google" ]; then
  source /google/devshell/bashrc.google
fi

For anyone who's curious, those lines are put in there by /etc/profile.d/restore_bashrc.sh.

If you ran into a similar issue and want to fix it manually, you can add the following lines to your .bashrc

for FILE in /google/devshell/bashrc.google.d/*; do
  if [ -f "$FILE" ]; then
    source "$FILE"
  fi
done