#!/bin/bash

set -e -E -u -o pipefail -o noclobber -o noglob +o braceexpand || exit -- 1
trap -- 'printf -- "[ee]  failed:  %s\\n" "${BASH_COMMAND}" >&2 ; exit -- 1' ERR || exit -- 1

if test "${#}" -eq 0 ; then
	printf -- '[ee]  expected arguments;  aborting!\n' >&2
	exit -- 99
fi




_sccache_bin=/usr/bin/sccache
test -f "${_sccache_bin}"
test -x "${_sccache_bin}"




case "${0}" in
	
	( sccache | */sccache )
		test "${#}" -ge 1
		case "${1}" in
			( sccache | */sccache )
				shift -- 1
				exec -- "${0}" "${@}"
			;;
		esac
		_delegate="${1}"
		shift -- 1
	;;
	
	( cc | c++ | gcc | g++ | clang | clang++ | rustc )
		_delegate="${0}"
	;;
	( */cc | */c++ | */gcc | */g++ | */clang | */clang++ | */rustc )
		_delegate="${0##*/}"
	;;
	
	( * )
		printf -- '[%08d] [ee]  invalid tool `%s`;  aborting!\n' "${$}" "${0}" >&2
		exit -- 99
	;;
esac




if test "/proc/${PPID}/exe" -ef "${_sccache_bin}" ; then
	
	readarray -d ':' -t -- _paths < <( printf -- '%s' "${PATH}" )
	
	_delegate_bin=''
	for _path in "${_paths[@]}" ; do
		if test -z "${_path}" ; then
			continue
		fi
		_delegate_bin_0="${_path}/${_delegate}"
		if test ! -f "${_delegate_bin_0}" -o ! -x "${_delegate_bin_0}" ; then
			continue
		fi
		if test "${0}" -ef "${_delegate_bin_0}" ; then
			continue
		fi
		_delegate_bin="${_delegate_bin_0}"
		break
	done
	
	if test -z "${_delegate_bin}" ; then
		printf -- '[%08d] [ee]  failed to resolve tool `%s`;  aborting!\n' "${$}" "${_delegate}" >&2
		exit -- 99
	fi
	
	exec -- "${_delegate_bin}" "${@}"
fi




exec -- "${_sccache_bin}" "${_delegate}" "${@}"