Bash: Automatically "nvm use" when .nvmrc is detected in current or ancestor directories. Put this at the end of your ~/.bashrc

.bashrc

find-up () {
  path=$(pwd)
  while [[ "$path" != "" && ! -e "$path/$1" ]]; do
      path=${path%/*}
  done
  echo "$path"
}

automatic-nvm-use() {
  NVM_PATH=$(find-up .nvmrc | tr -d '[:space:]')

  if [[ $NVM_PATH == $NVM_PATH_WAS ]]; then
      return
  fi

  NVM_PATH_WAS=$NVM_PATH
  
  if [[ -f "$NVM_PATH/.nvmrc" ]]; then
      nvm use $(<"$NVM_PATH/.nvmrc")
  else
      nvm use default
  fi
}

if [[ "$PROMPT_COMMAND" ]]; then
  export PROMPT_COMMAND=$PROMPT_COMMAND;automatic-nvm-use
else
  export PROMPT_COMMAND=automatic-nvm-use
fi