#!/bin/bash

######################################################################
#
#  Copyright (c) 2015 arakasi72 (https://github.com/arakasi72)
#
#  --> Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
#
######################################################################

###TEST###
###TEST2###

PATH=/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/bin:/sbin

if [ "$(id -u)" != "0" ]; then
  echo "Must be run as root, directly or with sudo"
  exit 1
fi

if [ ! -d /etc/rtinst ]; then
  git clone https://github.com/arakasi72/rtinst.git /etc/rtinst
fi

cd /etc/rtinst

branch=$(basename "$(git symbolic-ref -q HEAD)")

# if branch is empty then it is a tag
if [ -z $branch ]; then
  branch=$(git describe --tags --exact-match)
  if [ ${branch:0:1} = v ]; then
    git fetch origin
    latest=$(git tag | sort -V | grep ^v | tail -1)
    if [ $branch = $latest ]; then
      echo "Already using the latest release: $branch"
      exit
    fi
    # update to latest release
    echo "rtinst updating from $branch to $latest"
    cd
    rm -fr /etc/rtinst
    git clone -q https://github.com/arakasi72/rtinst.git /etc/rtinst
    cd /etc/rtinst
    git checkout $latest
    cd
    ln -sf /etc/rtinst/scripts/* /usr/local/bin
    ln -sf /etc/rtinst/rtsetup /usr/local/bin
    exit
  else
    echo "Not a branch, or a numbered release"
    echo "Run rtsetup to switch to another build"
    exit
  fi
fi

if [ $(git ls-remote --heads https://github.com/arakasi72/rtinst.git $branch | wc -l) -eq 0 ]; then
  echo "$branch no longer appears to exist"
  echo "run rtsetup to reset branch"
else
  git fetch --all
  git reset --hard origin/$branch 2>&1 >> /dev/null
  git pull origin $branch

  ln -sf /etc/rtinst/scripts/* /usr/local/bin
  ln -sf /etc/rtinst/rtsetup /usr/local/bin
fi