#!/bin/bash

set -e

if [ ! "$NVM_SOURCE" ]; then
  NVM_SOURCE="https://github.com/creationix/nvm.git"
fi

if [ ! "$NVM_DIR" ]; then
  NVM_DIR="$HOME/.nvm"
fi

if ! hash git 2>/dev/null; then
  echo >&2 "You need to install git - visit http://git-scm.com/downloads"
  echo >&2 "or, use install-gitless.sh instead."
  exit 1
fi

if [ -d "$NVM_DIR" ]; then
  echo "=> NVM is already installed in $NVM_DIR, trying to update"
  echo -e "\r=> \c"
  cd "$NVM_DIR" && git pull
else
  # Cloning to $NVM_DIR
  mkdir -p "$NVM_DIR"
  git clone "$NVM_SOURCE" "$NVM_DIR"
fi

echo

# Detect profile file if not specified as environment variable (eg: PROFILE=~/.myprofile).
if [ ! "$PROFILE" ]; then
  if [ -f "$HOME/.bash_profile" ]; then
    PROFILE="$HOME/.bash_profile"
  elif [ -f "$HOME/.zshrc" ]; then
    PROFILE="$HOME/.zshrc"
  elif [ -f "$HOME/.profile" ]; then
    PROFILE="$HOME/.profile"
  fi
fi

SOURCE_STR="[ -s \"$NVM_DIR/nvm.sh\" ] && . \"$NVM_DIR/nvm.sh\"  # This loads NVM"

if [ -z "$PROFILE" ] || [ ! -f "$PROFILE" ] ; then
  if [ -z $PROFILE ]; then
	echo "=> Profile not found. Tried $HOME/.bash_profile and $HOME/.profile"
  else
	echo "=> Profile $PROFILE not found"
  fi
  echo "=> Run this script again after running the following:"
  echo
  echo "\ttouch $HOME/.profile"
  echo
  echo "-- OR --"
  echo
  echo "=> Append the following line to the correct file yourself"
  echo
  echo "\t$SOURCE_STR"
  echo
  echo "=> Close and reopen your terminal afterwards to start using NVM"
  exit
fi

if ! grep -qc 'nvm.sh' $PROFILE; then
  echo "=> Appending source string to $PROFILE"
  echo "" >> "$PROFILE"
  echo $SOURCE_STR >> "$PROFILE"
else
  echo "=> Source string already in $PROFILE"
fi

echo "=> Close and reopen your terminal to start using NVM"