SConstruct

import os
import re

env = Environment();
env.Append(ENV={'CLASSPATH':'/usr/share/java/stringtemplate.jar:/usr/share/java/antlr-3.1.3.jar'})

def antlr_py_emitter(target, source, env):
    target=[]
    fname, ext = os.path.splitext(str(source[0]))
    target.append(fname+'Lexer.py')
    target.append(fname+'Parser.py')
    target.append(fname+'.tokens')
    return (target, source)
    
antlr_py = Builder(action='java org.antlr.Tool $SOURCE', src_suffix='.g', emitter=antlr_py_emitter)
env.Append(BUILDERS={'AntlrPy' : antlr_py})

env.Append(BUILDERS={'AntlrTreePy' :
                     Builder(action='java org.antlr.Tool $SOURCE',
                             src_suffix='.g',
                             suffix='.py')})

vcd_grammar = env.AntlrPy('ValueChangeDump')
interpreter = env.AntlrTreePy('InterpretVCDHeader')
Depends(interpreter, vcd_grammar)
sim = env.AntlrTreePy('VCDSimulation')
Depends(sim, vcd_grammar)