#!/bin/bash

# This cript creates default links to a set of llvm binaries
# ex. /usr/bin/clang -> /usr/bin/clang-18

set -e

if [ "$EUID" -ne 0 ]
  then echo "This script must be run as root"
  exit 1
fi

# Detect clang version
#  Command Breakdown:
#     Get all installed packages
#     |             Detect clang version
#     |             |                             Sort available versions
#     |             |                             |         Pick highest version
#     |             |                             |         |           Remove "clang-" to extract the version only
#     v             v                             v         v           v
VER=$(dpkg --list | grep -o "clang-[0-9][0-9]*" | sort -r | head -n 1 | sed "s#clang-##")
#echo Detected Tool-Version: $VER

# Ensure all tools are installed
TOOLS=(
clang
clang++
llvm-windres
llvm-ranlib
llvm-ar
llvm-strip
)

for TOOL in "${TOOLS[@]}"
do

    set +e
    OUTPUT=$($TOOL-$VER --version 2>&1)
    EXIT_CODE=$?
    set -e
  
	# on error (ex. no ground truth file) just print nothing
	if [ $EXIT_CODE -ne 0 ]
	then
	    echo $TOOL-$VER must be installed!
	    exit 1
	fi

	#echo Found $TOOL-$VER	

	# Get full path
	TOOL_PATH=$(which $TOOL-$VER)
	
	# Create links
	ln -sf $TOOL_PATH /usr/bin/$TOOL
	
done