Lazy loaded NVM version in iTerm2 Status Bar component

README.md

Source custom.zsh in your zsh profile, then in iTerm 2 go to Preferences -> Profiles -> Session, and under Miscellaneous check "Status bar enabled" then click "Configure Status Bar".

Add an Interpolated String component, then configure the String Value to be \(user.nodeVersion) (adjust to match the name of the variable set in iterm2_print_user_vars(), if different)

Now when you load a new session with the configured profile, the Status Bar will show "unset" until node is loaded from nvm, and will show the correct version whenever nvm use is called.

custom.zsh

#!/bin/sh
# See https://www.iterm2.com/3.3/documentation-scripting-fundamentals.html
function iterm2_print_user_vars() {
  iterm2_set_user_var nodeVersion $(set_node_version)
}

function set_node_version() {
  if (type _zsh_nvm_nvm &>/dev/null); then
    echo $(nvm current)
  else
    echo "unset"
  fi
}

# if nvm isn't loaded, and user switches into a dir with .nvmrc, load nvm
function chpwd() {
  if ! (type _zsh_nvm_nvm &>/dev/null); then
    if [[ -e ".nvmrc" ]]; then
      nvm use
    fi
  fi
}