#!/usr/bin/env bash
#   Copyright (C) 2024 John Törnblom
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING. If not see
# <http://www.gnu.org/licenses/>.

SCRIPT_PATH="${BASH_SOURCE[0]}"
SCRIPT_NAME="$(basename "${SCRIPT_PATH}")"
SCRIPT_DIR="$(dirname "${SCRIPT_PATH}")"

# check if script name matches an llvm tool
LLVM_BINDIR=$("${SCRIPT_DIR}/prospero-llvm-config" --bindir)
BIN_PATH="${LLVM_BINDIR}/${SCRIPT_NAME}"
if [ -f "${BIN_PATH}" ]; then
    exec "${BIN_PATH}" "$@"
fi

# check if symlink points to this script
SCRIPT_LINK="$(readlink "${SCRIPT_PATH}")"
SCRIPT_LINK="$(basename "${SCRIPT_LINK}")"
if [ "$SCRIPT_LINK" = "prospero-llvm" ]; then
    BIN_NAME=$(echo $SCRIPT_NAME | rev | cut -d'-' -f1 | rev)
    BIN_PATH="${LLVM_BINDIR}/${BIN_NAME}"
    exec -a "${SCRIPT_NAME}" "${BIN_PATH}" "$@"
fi

# if the script is not a symlink, its probably a copy of a symlink
if [ "$SCRIPT_LINK" = "" ]; then
    BIN_NAME=$(echo $SCRIPT_NAME | rev | cut -d'-' -f1 | rev)
    BIN_PATH="${LLVM_BINDIR}/llvm-${BIN_NAME}"
    if [ "$BIN_NAME" = "llvm" ]; then
	exit 1
    fi
    exec -a "${SCRIPT_NAME}" "${BIN_PATH}" "$@"
fi

# assume the symlink points to another symlink in the script dir
BIN_PATH="${SCRIPT_DIR}/${SCRIPT_LINK}"
exec -a "${SCRIPT_NAME}" "${BIN_PATH}" "$@"
