#!/bin/bash

# given in disk version information, return 0 if an update is available

NEED_UPDATE=false
VERFILE=/var/run/.ncp-latest-version

if test -f $VERFILE && grep -qP "v\d+\.\d+\.\d+" $VERFILE; then

  MAJOR=$( grep -oP "\d+\.\d+\.\d+" $VERFILE | cut -d. -f1 )
  MINOR=$( grep -oP "\d+\.\d+\.\d+" $VERFILE | cut -d. -f2 )
  PATCH=$( grep -oP "\d+\.\d+\.\d+" $VERFILE | cut -d. -f3 )

  MAJ=$( grep -oP "\d+\.\d+\.\d+" /usr/local/etc/ncp-version | cut -d. -f1 )
  MIN=$( grep -oP "\d+\.\d+\.\d+" /usr/local/etc/ncp-version | cut -d. -f2 )
  PAT=$( grep -oP "\d+\.\d+\.\d+" /usr/local/etc/ncp-version | cut -d. -f3 )

  if [[ $MAJOR > $MAJ ]]; then
    NEED_UPDATE=true
  elif [[ $MAJOR == $MAJ ]] && [[ $MINOR > $MIN ]]; then
    NEED_UPDATE=true
  elif [[ $MAJOR == $MAJ ]] && [[ $MINOR == $MIN ]] && [[ $PATCH > $PAT ]]; then
    NEED_UPDATE=true
  fi
fi
[[ "$NEED_UPDATE" == "true" ]] && exit 0