import django
import os.path
import re
def get_svn_revision(path=None):
"""
Returns the SVN revision in the form SVN-XXXX,
where XXXX is the revision number.
Returns SVN-unknown if anything goes wrong, such as an unexpected
format of internal SVN files.
If path is provided, it should be a directory whose SVN info you want to
inspect. If it's not provided, this will use the root django/ package
directory.
"""
rev = None
if path is None:
path = django.__path__[0]
entries_path = '%s/.svn/entries' % path
try:
entries = open(entries_path, 'r').read()
except IOError:
pass
else:
# Versions >= 7 of the entries file are flat text. The first line is
# the version number. The next set of digits after 'dir' is the revision.
if re.match('(\d+)', entries):
rev_match = re.search('\d+\s+dir\s+(\d+)', entries)
if rev_match:
rev = rev_match.groups()[0]
# Older XML versions of the file specify revision as an attribute of
# the first entries node.
else:
from xml.dom import minidom
dom = minidom.parse(entries_path)
rev = dom.getElementsByTagName('entry')[0].getAttribute('revision')
if rev:
return u'SVN-%s' % rev
return u'SVN-unknown'
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