#!/bin/sh -efu

PROG="${0##*/}"

etc="/etc/rpm"

[ "$0" = "./$PROG" ] && etc="." ||:
[ -f $etc/rpmwraprc ] && . $etc/rpmwraprc ||:
[ -f ~/.rpmwraprc ] && . ~/.rpmwraprc ||:

: ${RPM_PREFIX:="/usr/bin"}
: ${RPM:="$RPM_PREFIX/rpm"}
: ${macrofile:=".rpmwrapmacros"}

cwd="$(pwd)"
prefix=""
args=""

sIFS="$IFS"
IFS=":"
for i in $allow_prefix; do
    case "$cwd" in
	$i/*|$i)
	    [ -f "$i/$macrofile" ] && prefix="$i" ||:
	    ;;
	*)
	    continue
	    ;;
    esac
done
IFS="$sIFS"

rpmrc=
exit_handler()
{
	local rc=$?
	trap - EXIT
	[ -z "$rpmrc" ] || rm -r -- "$rpmrc"
	exit $rc
}

if [ -n "$prefix" ]; then
    rpmrc="$(mktemp -t "$PROG-rpmrc.XXXXXXXX")"
    trap exit_handler HUP PIPE INT QUIT TERM EXIT
    macrofiles="$($RPM --showrc| grep macrofiles)"
    macrofiles="${macrofiles#macrofiles}"
    macrofiles="${macrofiles#*:}"
    args="--rcfile=$rpmrc"
    cat <<EOF > "$rpmrc"
include:	/usr/lib/rpm/rpmrc
macrofiles:	${macrofiles+$macrofiles:}$prefix/$macrofile
EOF
fi
[ -x "$RPM_PREFIX/$PROG" ]  && "$RPM_PREFIX/$PROG" $args "$@"