#!/bin/sh
# Author: mikhailnov
# Remove flags that clang does not know but which cannot be removed properly
# https://bugzilla.rosalinux.ru/show_bug.cgi?id=9567

set -efu

echo_err() {
	echo "$@" 1>&2
}

# %noclang_optflags
NOCLANG_OPTFLAGS="${NOCLANG_OPTFLAGS:-}"
# which flags to remove in addition to %noclang_optflags,
# set custom REMOVE_CFLAGS in %build or redefine %noclang_optflags
REMOVE_CFLAGS="${REMOVE_CFLAGS:-}"
# convert flags list to regexp
REMOVE="$(echo "$NOCLANG_OPTFLAGS $REMOVE_CFLAGS" | sed -e 's, ,|,g' -e 's,|$,,g')"

# _CLANG_ must be changed to /usr/bin/clang++ and then to /usr/bin/clang in another copy of this wrapper
if echo "$@" | grep -qE -- "${REMOVE}"
	then
		echo_err "DEBUG: clang-wrapper: arguements will be cut-out!"
		echo_err "DEBUG: arguements were: "
		echo_err "========================="
		echo_err "$@"
		echo_err "========================="
		new_args="$(echo "$@" | sed -r -e "s,${REMOVE},,g")"
		echo_err "DEBUG: new arguements are: "
		echo_err "========================="
		echo_err ${new_args}
		# https://stackoverflow.com/a/37141139 (??)
		_CLANG_ ${new_args}
	else
		_CLANG_ "$@"
fi