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Python Source  |  2011-02-15  |  2.1 KB  |  70 lines
  1. """Fix incompatible renames
  2.  
  3. Fixes:
  4.   * sys.maxint -> sys.maxsize
  5. """
  6. # Author: Christian Heimes
  7. # based on Collin Winter's fix_import
  8.  
  9. # Local imports
  10. from .. import fixer_base
  11. from ..fixer_util import Name, attr_chain
  12.  
  13. MAPPING = {"sys":  {"maxint" : "maxsize"},
  14.           }
  15. LOOKUP = {}
  16.  
  17. def alternates(members):
  18.     return "(" + "|".join(map(repr, members)) + ")"
  19.  
  20.  
  21. def build_pattern():
  22.     #bare = set()
  23.     for module, replace in MAPPING.items():
  24.         for old_attr, new_attr in replace.items():
  25.             LOOKUP[(module, old_attr)] = new_attr
  26.             #bare.add(module)
  27.             #bare.add(old_attr)
  28.             #yield """
  29.             #      import_name< 'import' (module=%r
  30.             #          | dotted_as_names< any* module=%r any* >) >
  31.             #      """ % (module, module)
  32.             yield """
  33.                   import_from< 'from' module_name=%r 'import'
  34.                       ( attr_name=%r | import_as_name< attr_name=%r 'as' any >) >
  35.                   """ % (module, old_attr, old_attr)
  36.             yield """
  37.                   power< module_name=%r trailer< '.' attr_name=%r > any* >
  38.                   """ % (module, old_attr)
  39.     #yield """bare_name=%s""" % alternates(bare)
  40.  
  41.  
  42. class FixRenames(fixer_base.BaseFix):
  43.     PATTERN = "|".join(build_pattern())
  44.  
  45.     order = "pre" # Pre-order tree traversal
  46.  
  47.     # Don't match the node if it's within another match
  48.     def match(self, node):
  49.         match = super(FixRenames, self).match
  50.         results = match(node)
  51.         if results:
  52.             if any([match(obj) for obj in attr_chain(node, "parent")]):
  53.                 return False
  54.             return results
  55.         return False
  56.  
  57.     #def start_tree(self, tree, filename):
  58.     #    super(FixRenames, self).start_tree(tree, filename)
  59.     #    self.replace = {}
  60.  
  61.     def transform(self, node, results):
  62.         mod_name = results.get("module_name")
  63.         attr_name = results.get("attr_name")
  64.         #bare_name = results.get("bare_name")
  65.         #import_mod = results.get("module")
  66.  
  67.         if mod_name and attr_name:
  68.             new_attr = LOOKUP[(mod_name.value, attr_name.value)]
  69.             attr_name.replace(Name(new_attr, prefix=attr_name.get_prefix()))
  70.