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

CCACHE_COMPILERS="%%CCACHE_COMPILERS%% ${EXTRA_COMPILERS}"
CCLINKDIR="%%CCLINKDIR%%"
PREFIX="%%PREFIX%%"

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
