#!/bin/bash
if [ -f /usr/share/OBI/partition-help ]
then
  dpath="/usr/share/OBI"
elif [ -f "$HOME/partition-help" ]
then
  dpath="$HOME"
elif [ -f "$PWD/partition-help" ]
then
  dpath="$PWD"
else
  echoout "Error finding the OBI path... must abort, this is inconceivable"
  exit
fi

filename="$HOME/partition-help.txt"
LC_ALL=C;LANG=C
ram=$(free -m|grep "Mem:"|tr -s ' ' '\t'|cut -f 2)
devices=($(lsblk|sed 's/..sd*//'|grep sd| sed 's/ .*//'))
device=${devices[*]}
num_devices="${#devices[@]}"
intro="$num_devices devices"
if [ "$num_devices" == "1" ]
then
  device="/dev/${devices[0]}"
  intro="$num_devices device"
fi
drive_size=$(lsblk |grep "^${devices[0]}" | awk '{print $4}')
if [[ $ram -ge 3000 ]]
then
  ramG=$(free -g|grep "Mem:"|tr -s ' ' '\t'|cut -f 2)
  swapsize=$(( (ramG/2) ))
  swapsize="${swapsize} GB"
  if [[ $ramG -ge 4 ]]
  then
    laptop="4 GB"
    ram="${ramG} GB"
  else
    laptop=$(( (ramG*2) ))
    laptop="${laptop} GB"
    ram="${ramG} GB"
  fi
else
  if [[ $ram -le 512 ]]
  then
     swapsize="512MB"
     laptop="512 MB"
  else
    swapsize="${ram} MB
NOTE: you could get by on around 512MB"
    laptop=$(( (ram*2) ))
    laptop="${laptop} MB"
    ram="${ram} MB"
  fi
fi
redtext="\0033[31m"
greentext="\0033[32m"
resetvid="\0033[0m"

text="You can install a system from a tarball into two partitions:

one root file system partition and 
one swap partition

This way it is possible to create a *dual boot* device with an existing (already
installed) operating system. It is also possible to create a separate
*data partition*, that can be used by linux as well as Windows. (Must be FAT32, FAT16, or NTFS)

OSX uses HFS and HFS+, though FAT32 will work well with both OSX and Linux.  NTFS is usable by OSX through 3rd party apps.

OBI detects $intro
${redtext}${device}${resetvid}

Edit and create partitions! Apply with the ${greentext}green tick${resetvid} in gparted

One partition should be labeled ${redtext}obi-root${resetvid}
One (smaller) partition should be labeled ${redtext}obi-swap${resetvid}

These labeled partitions can be identified and selected automatically
Manual selection is also possible, if you do not want to temporarily label them this way.

For example:
The drive ${devices[0]} is $drive_size
You have $ram RAM, so the swap should be around $swapsize

NOTE, if you want to hibernate you should use around $laptop for your swap"
echo -e "${text}" > "${filename}"
if which xterm >/dev/null 2>&1
then
xterm -sb -rightbar -fa default -fg black -bg beige -fs 12  -geometry 80x32 -title "Help to partition" -hold -e fold -sw 80 "${filename}" &
fi
sleep 3
sudo gparted && sudo "$dpath/obi"