#! /bin/sh

# ylwrap - wrapper for lex/yacc invocations.  Local version, the
# autotools scriptversion=2015-08-06.06; # UTC doesnt work for us
# because it does not move location.hh position.hh stack.hh into the
# appropriate directory (which is a bug, but it's simpler to rewrite a
# simple version for our needs than to fix the original).

fatal() {
    echo $* 1>&2
    exit 1
}
usage() {
    fatal "Usage: ylwrap query/wasaparse.y"
}

test $# -ge 1 || usage

toptmpdir=/tmp/rclylwrap$$
tmpdir=${toptmpdir}/tmp
mkdir -p "${tmpdir}"

cleanup() {
    rm -rf "${toptmpdir}"/tmp/*
    rmdir "${tmpdir}"
    rmdir "${toptmpdir}"
}

trap cleanup 0 2 15 

# First arg is the input file

input=$1
inputdir=`dirname $1`
curdir=`pwd` || exit 1
absinput="${curdir}/${input}"

(cd "${tmpdir}"; bison -d -y $absinput)
ls $tmpdir

for f in location.hh position.hh stack.hh; do
    cmp -s "${tmpdir}"/$f "${inputdir}"/$f || cp -p "${tmpdir}"/$f "${inputdir}"
done

# Note that we'd prefer to use wasaparse.h instead of wasaparse.hpp,
# but automake generates a dist list with wasaparse.hpp, so no choice.

# Fix the include line in y.tab.c (it wants to include y.tab.h, but we already
# include it as wasaparse.hpp
(cd "${tmpdir}"; \
    sed -e 's/#include "y.tab.h"//' < y.tab.c > toto; \
    mv -f toto y.tab.c)

cmp -s "${tmpdir}"/y.tab.c "${inputdir}"/wasaparse.cpp || \
        cp -p "${tmpdir}"/y.tab.c "${inputdir}"/wasaparse.cpp
cmp -s "${tmpdir}"/y.tab.h "${inputdir}"/wasaparse.hpp || \
        cp -p "${tmpdir}"/y.tab.h "${inputdir}"/wasaparse.hpp