Bash script absolute path with OS X

Question

I am trying to obtain the absolute path to the currently running script on OS X.

I saw many replies going for readlink -f $0. However since OS X\'s

Answer 1

I like this:

#!/usr/bin/env bash
function realpath() {
    local _X="$PWD"
    local _LNK=$1
    cd "$(dirname "$_LNK")"
    if [ -h "$_LNK" ]; then
        _LNK="$(readlink "$_LNK")"
        cd "$(dirname "$_LNK")"
    fi
    echo "$PWD/$(basename "$_LNK")"
    cd "$_X"
}