#!/usr/bin/env bash

### Author: Orestis Ousoultzoglou
#           <xlxs4@protonmail.ch>
#

### Assert we are at the root repo dir.
# -> $0 expands to the name of the script,
# because bash gets invoked with
# a file of commands.
# -> % is the pattern-matching operator.
# It removes shortest matched substring
# from the rear (in this case, everything
# after the last '/' in the current path).
# -> Example: if $0 is /home/foo/bar.sh,
# cd ${0%/*} expands to cd /home/foo
cd ${0%/*}

### Grab MATLAB metadata.
# We launch MATLAB with a variety of
# startup flags to make things
# faster and use the CLI mode.
# -> path is a MATLAB function which
# returns everything inside the MATLAB path.
# MATLAB also greets the user with a message
# when launched without a display.
# From that message we grab the
# release and version.
# Because every default path dir/file sits
# at /usr/local/, we can safely assume that
# things added by the user sit elsewhere.
MHOLD="$(matlab -nosplash -nodisplay -nodesktop -nojvm -noFigureWindows -singleCompThread -r "path;exit" | grep R2 | grep -o '^[^)]\+' | sed 's/(//' | sed -n '/\usr\/local/!p')"
MRELEASE="$(echo $MHOLD | awk '{print $1}')"
MVERSION="$(echo $MHOLD | awk '{print $2}')"
MUPATH="$(echo $MHOLD | sed -re 's,\s+, ,g' | cut -d ' ' -f 3-)"

### Display MATLAB release.
echo -e "\u001b[33;1mMATLAB\u001b[0m \u001b[34;1mrelease:\u001b[0m\u001b[33;1m $MRELEASE\u001b[0m"
### Display MATLAB version.
echo -e "\u001b[33;1mMATLAB\u001b[0m \u001b[34;1mversion:\u001b[0m\u001b[33;1m $MVERSION\u001b[0m"
### Display permanent user additions to MATLAB's path.
echo -e "\u001b[33;1mUser additions to MATLAB \u001b[0m\u001b[33;1mpath\u001b[0m\u001b[34;1m (permanent): $MUPATH\u001b[0m"