Fix the issue #80 (https://github.com/skycoin/skywire/issues/80) in skycoin/skywire repo

opiprime-skywire-fix.sh

#!/bin/bash
# ** Goal **
# Update the init script of the skywire services running on this pc to 
# fix a bug (https://github.com/skycoin/skywire/issues/80)
#
# ** Why? **
# A few time ago the dev team changed the skywire code to make it more
# portable using dynamic paths (learning for the environment, that's
# the right way to doit) But the image was still configured in a static
# way and that break the nodes once you update the skywire code.
#
# ** What it does? **
# This script fix that by setting the pc environment at service init
# time to cope with that change; making the least invasive change to
# keeping the code as portable as possible.
#
# ** Note **
# This is a temporary fix, the re-build of the images with this fix
# built in must be the final fix.
#
# ** Author **
# [email protected] from Simelo/skycoin team
# Date: nov 13 01:22:27 CST 2018

# local vars.
DEST="/etc/rebuild.sh"
SOURCE="/etc/bootsamos.sh"

# To check if the rebuild.sh script has the fix already.
FIXED=`cat $DEST | grep "export"`

# Magic goes here
if [ -z "$FIXED" ] ; then
	# yes, it need to be fixed.
	echo "Broken system, fixing that."
	echo '#!/bin/bash' > $DEST
	echo "export GOPATH=/usr/local/skywire/go" >> $DEST
	echo "export GOROOT=/usr/local/go" >> $DEST
	cat $SOURCE >> $DEST
	echo "Done, please reboot your node to apply changes."
else
	# already fixed, alert the user and exit
	echo "Already fixed, nothing to do, bye."
fi