Add MATLAB icon launcher in Ubuntu.

add_matlab_launcher.sh

#!/usr/bin/env bash
#
# add_matlab_launcher
#
# Author: M. Krinitz <mjk235 [at] nyu [dot] edu>
#
# Add a MATLAB icon launcher in Ubuntu.
# Date: 2023.07.14
# License: MIT

MATLAB_PNG="http://upload.wikimedia.org/wikipedia/commons/2/21/Matlab_Logo.png"
MATLAB_VERSION="2019a"
ICON_PATH="/usr/share/icons/matlab.png"
LAUNCHER_FILE="/usr/share/applications/matlab.desktop"

# Is current UID 0? If not, exit.

root_check() {

  if [ "$EUID" -ne "0" ] ; then
	  
    printf "%s\n" "ERROR: ROOT PRIVILEGES ARE REQUIRED TO CONTINUE. EXITING." >&2
    exit 1
fi
}

# Is wget installed? If not, install it.

wget_check() {

  if [ "$(dpkg-query --show --showformat='${Status}' wget 2>/dev/null \
    | grep --count "ok installed")" -eq "0" ]; then

    printf "%s\n" "WGET IS NOT INSTALLED. LET'S INSTALL IT..."
    apt-get install wget
fi
}

# Place MATLAB icon from 'da interwebs in: /usr/share/icons/.

get_icon() {

  if ! wget --progress=bar --tries=3 --wait=5 --continue $MATLAB_PNG --output-document="$ICON_PATH"; then

    printf "%s\n" "ERROR: FAILED TO DOWNLOAD MATLAB ICON. EXITING." >&2
    exit 1
fi
}

# Create matlab.desktop file in: /usr/share/applications/matlab.desktop.

make_file() {
  cat > "$LAUNCHER_FILE" << EOF
#!/usr/bin/env xdg-open
[Desktop Entry]
Type=Application
Icon=$ICON_PATH
Name=$MATLAB_VERSION
Comment=Start MATLAB - The Language of Technical Computing
Exec=matlab -desktop
Categories=Development;
EOF

  if ! [ -e "LAUNCHER_FILE" ]; then

    printf "%s\n" "ERROR: FAILED TO CREATE MATLAB LAUNCHER. EXITING." >&2
    exit 1
  fi
}

main() {
  root_check
  wget_check
  get_icon
  make_file

  printf "%s\n" "SUCCESSFULLY CREATED MATLAB LAUNCHER."
}

main "$@"