Get path of running script relative to present working directory

relative-path.sh

#!/bin/bash

# Hyubs Ursua <hyubs.u@gmail.com>
# MIT License

# Pre-requisite: If running OSX, install coreutils using homebrew or macports.

# The two if-statements checks and uses the correct command

if ! type "greadlink" > /dev/null 2>&1
then
    CMD_READLINK=readlink
else
    CMD_READLINK=greadlink
fi

if ! type "grealpath" > /dev/null 2>&1
then
    CMD_REALPATH=realpath
else
    CMD_REALPATH=grealpath
fi

# Get absolute path of running script
SCRIPT=$($CMD_READLINK -f "$0")
SCRIPT_PATH=$(dirname "$SCRIPT")

# Get path of running script relative to present working directory
PWD=`pwd`
REL_PATH=$($CMD_REALPATH --relative-to=$PWD $SCRIPT_PATH)
echo $REL_PATH