#!/bin/sh
#
# Author: Emanuel Haupt <ehaupt@FreeBSD.org>

CCACHE_COMPILERS="cc c++ CC gcc g++ gcc34 gcc42 gcc43 gcc44 gcc45 gcc46 gcc47 gcc48 gcc49 gcc5 gcc6 gcc7 gcc8 gcc9 gcc10 gcc11 gcc12 gcc13 gcc14 gcc15  g++34 g++42 g++43 g++44 g++45 g++46 g++47 g++48 g++49 g++5 g++6 g++7 g++8 g++9 g++10 g++11 g++12 g++13 g++14 g++15  cpp34 cpp42 cpp43 cpp44 cpp45 cpp46 cpp47 cpp48 cpp49 cpp5 cpp6 cpp7 cpp8 cpp9 cpp10 cpp11 cpp12 cpp13 cpp14 cpp15 clang clang++ clang33 clang34 clang35 clang36 clang37 clang38 clang39 clang40 clang50 clang60 clang70 clang80 clang90 clang10 clang11 clang12 clang13 clang14 clang15 clang16 clang17 clang18 clang19 clang20 clang-devel  clang++33 clang++34 clang++35 clang++36 clang++37 clang++38 clang++39 clang++40 clang++50 clang++60 clang++70 clang++80 clang++90 clang++10 clang++11 clang++12 clang++13 clang++14 clang++15 clang++16 clang++17 clang++18 clang++19 clang++20 clang++-devel  cpp33 cpp34 cpp35 cpp36 cpp37 cpp38 cpp39 cpp40 cpp50 cpp60 cpp70 cpp80 cpp90 cpp10 cpp11 cpp12 cpp13 cpp14 cpp15 cpp16 cpp17 cpp18 cpp19 cpp20 cpp-devel llvm-gcc llvm-c++ llvm-g++  ${EXTRA_COMPILERS}"
CCLINKDIR="libexec/ccache"
PREFIX="/usr/local"

usage() {
	cat << "EOUSAGE"
Usage: ccache-update-links [hv]

ccache-update-links maintains symlinks needed by ccache to work with additional
compilers.

    -h, --help   this help
    -v           verbose

EOUSAGE
}

case "$1"
in
	-h|--help)
	usage
	;;
esac

strip_path() {
	local IFS=":"
	local path
	set -- ${PATH}
	while [ $# -gt 0 ]; do
		if ! [ "${1}" = "${PREFIX}/libexec/ccache" ]; then
			path="${path}${path:+:}${1}"
		fi
		shift
	done
	echo "${path}"
}

# Remove ccache wrappers from PATH
PATH=$(strip_path)

# create compiler links
for comp in ${CCACHE_COMPILERS}
do
	if command -v "${comp}" >/dev/null; then
		if [ ! -L "${PREFIX}/${CCLINKDIR}/${comp}" ]; then
			[ "$1" = "-v" ] && echo "create symlink for ${comp}"
        		ln -sf ${PREFIX}/bin/ccache ${PREFIX}/${CCLINKDIR}/${comp}
		fi

		if [ ! -L "${PREFIX}/${CCLINKDIR}/world/${comp}" ]; then
			[ "$1" = "-v" ] && echo "create symlink for ${comp} (world)"
        		ln -sf ccache ${PREFIX}/${CCLINKDIR}/world/${comp}
		fi
	else
		if [ -L "${PREFIX}/${CCLINKDIR}/${comp}" ]; then
			[ "$1" = "-v" ] && echo "remove symlink for ${comp}"
			rm -f ${PREFIX}/${CCLINKDIR}/${comp}
		fi

		if [ -L "${PREFIX}/${CCLINKDIR}/world/${comp}" ]; then
			[ "$1" = "-v" ] && echo "remove symlink for ${comp} (world)"
			rm -f ${PREFIX}/${CCLINKDIR}/world/${comp}
		fi
	fi
done
