#!/bin/sh

trap 'exit 1' USR1
die() { printf '%s\n' "$@" 1>&2; kill -USR1 $$; }

: ${AUTORECONF=autoreconf}
: ${GNULIB=gnulib}
: ${GIT=git}
: ${PERL=perl}

$GIT submodule update --init \
	|| echo "Failed to update Gnulib sources from git."

if test -x $GNULIB/gnulib-tool; then
	$GNULIB/gnulib-tool --update -S || die "Failed to update Gnulib."
else
	die "Gnulib sources are not properly installed in gnulib/."
fi

$PERL fix-gnulib.pl -o lib/gnulib.mk -i lib/gnulib.mk.in \
	|| die "Failed to fixup Gnulib makefile fragment."

$AUTORECONF -fis