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     try:

    23         entries = open(entries_path, 'r').read()

    24     except IOError:

    25         pass

    26     else:

    27         # Versions >= 7 of the entries file are flat text.  The first line is

    28         # the version number. The next set of digits after 'dir' is the revision.

    29         if re.match('(\d+)', entries):

    30             rev_match = re.search('\d+\s+dir\s+(\d+)', entries)

    31             if rev_match:

    32                 rev = rev_match.groups()[0]

    33         # Older XML versions of the file specify revision as an attribute of

    34         # the first entries node.

    35         else:

    36             from xml.dom import minidom

    37             dom = minidom.parse(entries_path)

    38             rev = dom.getElementsByTagName('entry')[0].getAttribute('revision')

    39 

    40     if rev:

    41         return u'SVN-%s' % rev

    42     return u'SVN-unknown'