#!/bin/bash

############ SETTINGS ############
pfx="mmc"
backup_prefix="/mnt/sda2"
#DISTNAME="arm-soft-$pfx-master"
DISTNAME="arm-soft-$pfx-mini"
##################################

if ! [[ -f $backup_prefix/dist/$DISTNAME.tgz ]]; then
	echo "distribution not found: \"$DISTNAME.tgz\"";
	exit 1
fi

if ! [[ -d /$pfx ]]; then
	echo "mountpoint $pfx not present?";
	exit 1;
fi

if [[ -d /$pfx/home ]]; then
	echo "moving home folder from $pfx to $backup_prefix";
	#[[ -d $backup_prefix/home ]] && echo "$backup_prefix/home exists, remove or rename it" && exit 1;
	cp -rf /$pfx/home $backup_prefix/home
fi

if [[ -d /$pfx/bin/go ]]; then
	echo "moving bin/go from $pfx to $backup_prefix";
	[[ -d $backup_prefix/$pfx-go ]] && echo "$backup_prefix/$pfx-go exists, remove or rename it" && exit 1;
	mv /$pfx/bin/go $backup_prefix/$pfx-go
fi

if [[ -d /$pfx/go ]]; then
	echo "moving go workdir from $pfx to $backup_prefix";
	mv /$pfx/go $backup_prefix/$pfx-gowork
fi

echo "Removing all files/folders in $pfx";
cd /
rm -rf /$pfx/*
rm -f /$pfx/.*

echo "Extracting $DISTNAME.tgz to /$pfx"
cd $backup_prefix/dist
/bin/tar -xf $DISTNAME.tgz -C /$pfx

sleep 1;

if [[ -d $backup_prefix/home ]]; then
	echo "Putting home folder back";
	mv $backup_prefix/home /$pfx/home
	echo "Done"
fi

if [[ -f $backup_prefix/profile ]]; then
	echo "Restoring profile";
	cp -f $backup_prefix/profile /$pfx/etc/profile
fi

if [[ -d $backup_prefix/$pfx-go ]]; then
	echo "Restoring go install";
	mv $backup_prefix/$pfx-go /$pfx/bin/go
fi

if [[ -d $backup_prefix/$pfx-gowork ]]; then
	echo "Restoring go work directory";
	mv $backup_prefix/$pfx-gowork /$pfx/go
fi

#cp -f $backup_prefix/profile profile

cd /opt/etc
mv profile profile.opt
! [[ $? -eq 0 ]] && echo "profile DNE?" && exit 1;
if ! [[ -f profile ]]; then
	ln -s /mmc/etc/profile profile
else
	echo "/opt/etc/profile could not be moved";
	exit 1;
fi
#cd /opt/etc
#mv profile profile.opt
#ln -s /$pfx/etc/profile profile

echo; echo;
echo 'All done!';
echo; echo;


exit 0;