Symlink support for launch-linux.sh

[croogrog]

For ease of access I tried to use a symlink to launch-linux.sh but I got a not installed error. After looking into the script I recognized that the portion which ensures the local path did not resolve to the actual path of the script but used the symlink's path instead.
I quickly came up with a fix. This is working for me on fedora 43 and I expect it would work for most linux users.

relevant portion of launch-linux.sh

#!/usr/bin/env bash

# Ensure correct local path.
# Changed to properly resolve symlinks

# Removed
#SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )

# Added
SCRIPT_PATH="$(realpath "${BASH_SOURCE[0]}")"
SCRIPT_DIR="$(dirname "$SCRIPT_PATH")"

# No further changes
cd $SCRIPT_DIR
...

[mcmonkey4eva]

That script as written will not work for all users, that solves one set of issues by introducing other ones

Accounting for every possible edge case with this stuff is weirdly complicated.

[jtreminio]

Case in point:

I use this to get "WHAT DIRECTORY IS THIS FILE ACTUALLY IN?"

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"

Your suggestion is something I've used before but have run into problems with in the past. The current solution really is about as universal as you can get.