clear
printf "
================================================================================
Sensorgnome Software Installation Script for Raspberry Pi 2
================================================================================
"

VERSION_NEEDED="Raspbian GNU/Linux 8 (jessie)"
SG_VERSION="2016-05-04"
## check for correct version of OS

. /etc/os-release
if [[ "$PRETTY_NAME" != "$VERSION_NEEDED" ]]; then
    printf "
Wrong version of raspbian!

You must boot the RPi2 with the raspbian jessie lite 2016-03-28 image, available here:

  http://public.sensorgnome.org/RasperryPi2_Sensorgnome_Images/2016-03-18-raspbian-jessie-lite.img.7z

================================================================================
"
    return
fi

printf "
This script will install Sensorgnome Software version $SG_VERSION on the SD card.  

Hit Enter to continue, or Ctrl-C to stop..."

read x

## maybe resize root partition

UNUSED=`cat /proc/partitions | awk '/mmc/{if (!total) total=$3; else total-= $3}END{printf "%d\n", total *1024/1e6}'`

if (( $UNUSED + 0 > 100 )); then 
    printf "                                                
Your SD card has $UNUSED MB of extra storage that is not accessible.

To allow you to use this storage, I will launch raspi-config.
In raspi-config, please do this:

    - select 'Expand Filesystem'

    - select 'Finish' (by hitting TAB)

    - choose 'Yes' when asked to 'Reboot now?'

Ater rebooting, login and run this installation script again.  You can use
the up cursor to recover the command line you used to run the script.
Make sure to do 'sudo su' first, so that you are working as root.

Hit Enter to continue, or Ctrl-C to stop..."

    read x
    raspi-config
    return
fi

x=`cat /proc/swaps | wc -l`

## disable swap

if (( $x > 1 )); then
    printf "\nDisabling the swap partition..."

    dphys-swapfile swapoff
    dphys-swapfile uninstall
    update-rc.d dphys-swapfile remove
fi

## add user bone

if ( ! grep -q ^bone: /etc/passwd ); then 
    printf "\nAdding user bone (password 'bone') as synonym for 'pi'..."
    grep pi /etc/passwd | sed -e 's/pi/bone/g' >> /etc/passwd
    printf "bone\nbone\n" | passwd bone > /dev/null 2>&1
    ln -s /home/pi /home/bone
fi


## install needed software packages

printf "\nInstalling required raspbian packages; this will take a while...\n"

apt-get -y update
apt-get -y install gpsd chrony libfftw3-bin libgps21 nodejs vsftpd autossh libfftw3-single3 npm udhcpd libboost-filesystem1.55.0 libboost-date-time1.55.0 libboost-thread1.55.0 libvamp-sdk2 libvamp-hostsdk3 libjson-perl

printf "\nInstalling required nodejs packages; this will take a while...\n"

for p in socket.io express connect errorhandler body-parser method-override; do
    npm install -g $p; 
done

printf "

================================================================================
Installing sensorgnome software
================================================================================

"

## add symlinks to nodejs, fcd

ln -s /usr/bin/nodejs /usr/bin/node
ln -s /home/bone/proj/fcd/fcd /usr/bin/fcd

## fetch and unpack SG archive
(curl http://public.sensorgnome.org/RaspberryPi2_Sensorgnome_Images/2016_05_04_update_from_jessie_lite.tar.bz2) | (cd /; tar -xpjvf -)

systemctl enable hostnamesg.sh
#systemctl disable dhcpcd
#update-rc.d eth0-config defaults
#update-rc.d udhcpd defaults

sync

printf "

================================================================================
Installation Complete.  I will now reboot.  You might need to power off/on.
================================================================================

After the reboot, you will find me here:

   http://192.168.7.2   - web interface

    ftp://192.168.7.2   - FTP file server

Most computers will also be able to find me here:

   http://sgpi.local   - web interface

    ftp://sgpi.local   - FTP file server

To edit deployment.txt or to install SG_tag_database.csv, you can just
place this microSD card into another computer and copy files directly
onto the first drive.  DO NOT LET WINDOWS or OS X reformat this card!


Hit Enter to continue, or Ctrl-C to stop...
"

read x

reboot