#!/bin/bash

CC=cc

TURTLESDIR=`dirname $0`

if (( $# == 0 )) ; then
	echo "Usage: build-turtles-parser LANGFILE";
	echo "Generate a turtles parser from a LANG.lang.xml file.";
	exit 1;
fi

LANGFILE=$1
LANG=`basename $LANGFILE .lang.xml`
BUILDDIR=$LANG"_parser_builddir"

if ! xmllint --noout $LANGFILE; then
	echo "Malformed XML file."
	exit 1;
fi

case $LANGFILE in
	*".lang.xml")
		;;
	*)
		echo LANGFILE must have the form '$LANG.lang.xml';
		exit 1;
		;;
esac

rm -rf $BUILDDIR
mkdir $BUILDDIR
cd $BUILDDIR

TURTLESDIR=../$TURTLESDIR

# Resolve language.
xsltproc $TURTLESDIR/resolve_lists.xsl ../$LANGFILE | \
xsltproc -o $LANG.resolved-lang.xml \
	$TURTLESDIR/enumerate_productions.xsl -

# Generate BNF.
xsltproc -o ../$LANG.bnf $TURTLESDIR/language2bnf.xsl \
	$LANG.resolved-lang.xml

# Generate the lexer.
xsltproc -o $LANG"_lexer.l" \
	$TURTLESDIR/generate_flex_lexer.xsl \
	$LANG.resolved-lang.xml
flex -o$LANG"_lexer.c" $LANG"_lexer.l"

# Generate the parser.
xsltproc -o $LANG"_parser.y" \
	$TURTLESDIR/generate_bison_parser.xsl \
	$LANG.resolved-lang.xml
bison -v -d $LANG"_parser.y"

# Compile.
$CC `xml2-config --cflags --libs` \
	-o ../$LANG"_parser" \
	$LANG"_parser.tab.c"