should have working version

setup.py

@@ -1,7 +1,6 @@
 """The xonsh installer."""
 import os
 import sys
-import os, sys
 try:
     from setuptools import setup
     HAVE_SETUPTOOLS = True
@@ -11,7 +10,25 @@ except ImportError:
 
 VERSION = '0.1'
 
+TABLES = ['xonsh/lexer_table.py', 'xonsh/parser_table.py']
+
+def clean_tables():
+    for f in TABLES:
+        if os.path.isfile(f):
+            os.remove(f)
+            print('Remove ' + f)
+
+def build_tables():
+    print('Building lexer and parser tables.')
+    sys.path.insert(0, os.path.dirname(__file__))
+    from xonsh.parser import Parser
+    Parser(lexer_table='lexer_table', yacc_table='parser_table',
+           outputdir='xonsh')
+    sys.path.pop(0)
+
 def main():
+    clean_tables()
+    build_tables()
     with open('readme.rst', 'r') as f:
         readme = f.read()
     skw = dict(

xonsh/parser.py

@@ -105,7 +105,7 @@ class Parser(object):
 
     def __init__(self, lexer_optimize=True, lexer_table='xonsh.lexer_table',
                  yacc_optimize=True, yacc_table='xonsh.parser_table',
-                 yacc_debug=False):
+                 yacc_debug=False, outputdir=None):
         """Parameters
         ----------
         lexer_optimize : bool, optional
@@ -118,6 +118,8 @@ class Parser(object):
             Parser module used when optimized.
         yacc_debug : debug, optional
             Dumps extra debug info.
+        outputdir : str or None, optional
+            The directory to place generated tables within.
         """
         self.lexer = lexer = Lexer(errfunc=self._lexer_errfunc)
         lexer.build(optimize=lexer_optimize, lextab=lexer_table)
@@ -212,6 +214,8 @@ class Parser(object):
                            tabmodule=yacc_table)
         if not yacc_debug:
             yacc_kwargs['errorlog'] = yacc.NullLogger()
+        if outputdir is not None:
+            yacc_kwargs['outputdir'] = outputdir
         self.parser = yacc.yacc(**yacc_kwargs)
 
         # Keeps track of the last token given to yacc (the lookahead token)