Don't rewrite URLs

Remove the code that was appending ../static in front of some URLs, and add a
way to do cross-content linking.

pelican/utils.py

@@ -4,7 +4,9 @@ import re
 import pytz
 import shutil
 import logging
-from collections import defaultdict
+import errno
+from collections import defaultdict, Hashable
+from functools import partial
 
 from codecs import open
 from datetime import datetime
@@ -19,6 +21,32 @@ class NoFilesError(Exception):
     pass
 
 
+class memoized(object):
+   '''Decorator. Caches a function's return value each time it is called.
+   If called later with the same arguments, the cached value is returned
+   (not reevaluated).
+   '''
+   def __init__(self, func):
+      self.func = func
+      self.cache = {}
+   def __call__(self, *args):
+      if not isinstance(args, Hashable):
+         # uncacheable. a list, for instance.
+         # better to not cache than blow up.
+         return self.func(*args)
+      if args in self.cache:
+         return self.cache[args]
+      else:
+         value = self.func(*args)
+         self.cache[args] = value
+         return value
+   def __repr__(self):
+      '''Return the function's docstring.'''
+      return self.func.__doc__
+   def __get__(self, obj, objtype):
+      '''Support instance methods.'''
+      return partial(self.__call__, obj)
+
 def get_date(string):
     """Return a datetime object from a string.
 
@@ -300,3 +328,11 @@ def set_date_tzinfo(d, tz_name=None):
         return tz.localize(d)
     else:
         return d
+
+
+def mkdir_p(path):
+    try:
+        os.makedirs(path)
+    except OSError, e:
+        if e.errno != errno.EEXIST:
+            raise