#!/bin/bash

set -e

[ -z "$3" ] && echo "usage: \"$0\" <file> <source-prefix> <destination-dir>" && echo "This utility relocates binary <file> from <source-prefix> to <destonation-dir> together with all dependencies and adds rpath support." && exit 1</destonation-dir></source-prefix></file></destination-dir></source-prefix></file>

PREFIX="$2"

PREFIXLEN=${#PREFIX}

DEST="$3"

process_lib() {

FILESRC=$1

if [[ "${FILESRC}" == ${PREFIX}* ]]; then

	#FILEDEST_SHORT=`echo "${FILESRC}" | cut -c1-$PREFIXLEN`

	local FILEDEST_SHORT="${FILESRC:$PREFIXLEN}"

	local FILEDEST="${DEST}/${FILEDEST_SHORT}"

	if [ ! -f "${FILEDEST}" ]; then

		if [ ! -d `dirname "${FILEDEST}"` ]; then

			mkdir -p `dirname "${FILEDEST}"`

		fi

		cp "${FILESRC}" "${FILEDEST}"

		chmod a+rw "$FILEDEST"

		install_name_tool -add_rpath ./ "$FILEDEST" > /dev/null 2>&1 || true

		echo "Relinking ${FILEDEST_SHORT} ..."

		local FIRST=true

		local LINE=

		local LINE2=

		otool -L "${FILEDEST}" | while read -r LINE; do

			if $FIRST; then

				FIRST=false

			else

 		       	LINE=`echo "$LINE" | sed -e 's/^[ \t]*//' | sed -e 's/ \(.*\)$//'`

            	# make sure file isn't referencing itself

            	#A=$(basename "$FILEDEST")

            	#B=$(basename "$LINE")

            	if [ ! "$LINE" == "$FILESRC" ] && [[ "$LINE" == $PREFIX* ]]; then

            		#LINE2=`echo "${LINE}" | cut -c1-$PREFIXLEN`

            		LINE2="${LINE:$PREFIXLEN}"

            		install_name_tool -change "$LINE" "@rpath/$LINE2" "$FILEDEST"

            		process_lib "$LINE"

            	fi

			fi

    	done

		#echo "... finished ${FILEDEST_SHORT}"

	fi

fi

}

echo "Gathering deps for: $1"

#scan "$BASE_FILE"

#scan "$BASE_FILE" subscan

process_lib "$1"

echo "Success."

echo ""