Automatically set node version per project using .nvmrc file

auto_nvm_use.sh

# This will run `nvm use` everytime you change directory, if
#   1. an .nvmrc file is present
#   2. there is no .nvmrc but you're not using your default node
# Add it to your `.bash_profile` (or wherever else is suitable for your setup).

enter_directory(){
  if [ "$PWD" != "$PREV_PWD" ]; then
    PREV_PWD="$PWD";
    if [ -e ".nvmrc" ]; then
      nvm use;
    elif [[ $(nvm version) != $(nvm version default)  ]]; then
      echo "Reverting to nvm default version."
      nvm use default
    fi
  fi
}
# bash:
export PROMPT_COMMAND="$PROMPT_COMMAND enter_directory;"
# zsh:
# chpwd_functions=(${chpwd_functions[@]} "enter_directory")

Should line 17 read

export PROMPT_COMMAND="$PROMPT_COMMAND enter_directory;"

($PROMPT_COMMAND rather than $PROMP_COMMAND)?

yep! edited to reflect that - thanks :)