update.sh

#!/bin/bash

# Copyright (c) 2015, Bob Tidey
# All rights reserved.

# Redistribution and use, with or without modification, are permitted provided
# that the following conditions are met:
#    * Redistributions of source code must retain the above copyright
#      notice, this list of conditions and the following disclaimer.
#    * Neither the name of the copyright holder nor the
#      names of its contributors may be used to endorse or promote products
#      derived from this software without specific prior written permission.

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Description
# This script updates the installer for the browser-interface to control the RPi Cam. It can be run
# on any Raspberry Pi with a newly installed raspbian and enabled camera-support.
# Based on RPI_Cam_WEb_Interface installer by Silvan Melchior
# Edited by jfarcher to work with github
# Edited by slabua to support custom installation folder
# Additions by btidey, miraaz, gigpi
# Split up and refactored by Bob Tidey 

#Debug enable next 3 lines
exec 5> update.txt
BASH_XTRACEFD="5"
set -x

cd $(dirname $(readlink -f $0))

# Terminal colors
color_red="tput setaf 1"
color_green="tput setaf 2"
color_reset="tput sgr0"


fn_abort()
{
    $color_red; echo >&2 '
***************
*** ABORTED ***
***************
'
    echo "An error occurred. Exiting..." >&2; $color_reset
    exit 1
}

   trap 'fn_abort' 0
   set -e
   remote=$(
     git ls-remote -h origin master |
     awk '{print $1}'
   )
   local=$(git rev-parse HEAD)
   printf "Local : %s\nRemote: %s\n" $local $remote
   if [[ $local == $remote ]]; then
      dialog --title 'Update message' --infobox 'Commits match. Nothing update.' 4 35 ; sleep 2
   else
      dialog --title 'Update message' --infobox "Commits don't match. We update." 4 35 ; sleep 2
      git fetch origin master
   fi
   trap : 0
   dialog --title 'Update message' --infobox 'Update finished.' 4 20 ; sleep 2
   
   # We call updated install script passing through any quiet parameter
   if [ $# -eq 0 ]; then 
      ./install.sh
   else
      ./install.sh $1
   fi