[viewvc-users] Bad ra_local URL when repository path is a Windows UNC path

In my viewvc.conf I have "root_parents = //server/share/svn : svn".
This is the UNC path to where our repository lives on a network drive.
If I browse to a "view=annotate" ViewVC URL I see the message "Error
occurred while calculating annotation data."
If I change the line in the function markup_or_annotate in viewvc.py
that says "annotate = 'error'" so that it says "raise" and try again,
ViewVC croaks with this traceback:

Traceback (most recent call last):
  File "C:\Program Files\viewvc-1.1.3\lib\viewvc.py", line 4315, in main
    request.run_viewvc()
  File "C:\Program Files\viewvc-1.1.3\lib\viewvc.py", line 398, in run_viewvc
    self.view_func(self)
  File "C:\Program Files\viewvc-1.1.3\lib\viewvc.py", line 1772, in
view_annotate
    markup_or_annotate(request, 1)
  File "C:\Program Files\viewvc-1.1.3\lib\viewvc.py", line 1685, in
markup_or_annotate
    blame_source, revision = request.repos.annotate(path, rev)
  File "C:\Program Files\viewvc-1.1.3\lib\vclib\svn\svn_repos.py",
line 570, in annotate
    youngest_rev, oldest_rev)
  File "C:\Program Files\viewvc-1.1.3\lib\vclib\svn\svn_repos.py",
line 330, in __init__
    _rev2optrev(rev), self._blame_cb, ctx)
  File "C:\Python25\lib\site-packages\libsvn\client.py", line 1006, in
svn_client_blame2
    return apply(_client.svn_client_blame2, args)
SubversionException: ('Unable to open an ra_local session to URL', 180001)

By inserting the line "raise RuntimeError, args[0]" in the function
svn_client_blame2 in Python25/Lib/site-packages/libsvn/client.py, I
see that the repository URL that libsvn is trying to use is of the
form "file://///server/share/svn/repository/trunk/path/to/file".

Where that URL has 5 slashes, my command-line SVN client will only
accept 2; any more than 2 and it dies with "svn: Unable to open an
ra_local session to URL".

Is this a bug in ViewVC? Should the function _geturl in
viewvc-1.1.3/lib/vclib/svn/svn_ra.py be special-cased for UNC paths on
Windows?

Regards,
Richard Copley.

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