django/utils/version.py

   1 import django
   2 import os.path
   3 import re
   4
   5 def get_svn_revision(path=None):
   6     """
   7     Returns the SVN revision in the form SVN-XXXX,
   8     where XXXX is the revision number.
   9
  10     Returns SVN-unknown if anything goes wrong, such as an unexpected
  11     format of internal SVN files.
  12
  13     If path is provided, it should be a directory whose SVN info you want to
  14     inspect. If it's not provided, this will use the root django/ package
  15     directory.
  16     """
  17     rev = None
  18     if path is None:
  19         path = django.__path__[0]
  20     entries_path = '%s/.svn/entries' % path
  21
  22     if os.path.exists(entries_path):
  23         entries = open(entries_path, 'r').read()
  24         # Versions >= 7 of the entries file are flat text.  The first line is
  25         # the version number. The next set of digits after 'dir' is the revision.
  26         if re.match('(\d+)', entries):
  27             rev_match = re.search('\d+\s+dir\s+(\d+)', entries)
  28             if rev_match:
  29                 rev = rev_match.groups()[0]
  30         # Older XML versions of the file specify revision as an attribute of
  31         # the first entries node.
  32         else:
  33             from xml.dom import minidom
  34             dom = minidom.parse(entries_path)
  35             rev = dom.getElementsByTagName('entry')[0].getAttribute('revision')
  36
  37     if rev:
  38         return u'SVN-%s' % rev
  39     return u'SVN-unknown'