add autosizer initial import

build_arm_image/autosizer.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+# Automatic Image file resizer
+# Written by SirLagz
+strImgFile=$1
+
+if [[ ! $(whoami) =~ "root" ]]; then
+    echo ""
+    echo "**********************************"
+    echo "*** This should be run as root ***"
+    echo "**********************************"
+    echo ""
+    exit
+fi
+
+if [[ -z $1 ]]; then
+    echo "Usage: ./autosizer.sh <Image File>"
+    exit
+fi
+
+if [[ ! -e $1 || ! $(file $1) =~ "x86" ]]; then
+    echo "Error : Not an image file, or file doesn't exist"
+    exit
+fi
+
+partinfo=`parted -m $1 unit B print`
+partnumber=`echo "$partinfo" | grep ext4 | awk -F: ' { print $1 } '`
+partstart=`echo "$partinfo" | grep ext4 | awk -F: ' { print substr($2,0,length($2)-1) } '`
+loopback=`losetup -f --show -o $partstart $1`
+e2fsck -f $loopback
+minsize=`resize2fs -P $loopback | awk -F': ' ' { print $2 } '`
+minsize=`echo $minsize+1000 | bc`
+resize2fs -p $loopback $minsize
+sleep 1
+losetup -d $loopback
+partnewsize=`echo "$minsize * 4096" | bc`
+newpartend=`echo "$partstart + $partnewsize" | bc`
+part1=`parted $1 rm 2`
+part2=`parted $1 unit B mkpart primary $partstart $newpartend`
+endresult=`parted -m $1 unit B print free | tail -1 | awk -F: ' { print substr($2,0,length($2)-1) } '`
+truncate -s $endresult $1