What version are you running?
RBTools 0.7.4
What steps will reproduce the problem?

Create a svn repo
Commit something with non-ascii file names
Post this as review request via rbt post


What is the expected output? What do you see instead?
I expect a review request being created without errors. I see an exception instead.
What operating system are you using?
Ubuntu 14.04
Attach the debug out from the command.
$ rbt post --publish --debug --user=xxx --password=yyy --server=http://reviews --repository-url=http://svn/svn/main/ --target-groups=CRBBBLACKSILO --target-people=xxx --description-file=/tmp/tmpvSF0WvcreateReviewForCommit --summary=longsummary --submit-as=xxx 11479

/usr/local/lib/python2.7/dist-packages/RBTools-0.7.4-py2.7.egg/rbtools/commands/main.py:101: UnicodeWarning: Unicode equal comparison failed to convert both arguments to Unicode - interpreting them as being unequal
  elif opt.help or '--help' in args or '-h' in args:
>>> RBTools 0.7.4
>>> Python 2.7.6 (default, Jun 22 2015, 18:00:18) 
[GCC 4.8.2]
>>> Running on Linux-3.13.0-58-generic-i686-with-Ubuntu-14.04-trusty
>>> Home = /home/stbohne
>>> Current directory = /home/stbohne
>>> Running: git version
>>> Checking for a Subversion repository...
>>> Running: svn --non-interactive info http://svn/svn/main/
>>> Running: diff --version
>>> Running: svn --non-interactive --version -q
>>> repository info: Path: http://svn/svn/main, Base path: /, Supports changesets: False
>>> Making HTTP GET request to http://reviews/api/
>>> Making HTTP GET request to http://reviews/api/repositories/
>>> Cached response for HTTP GET http://reviews/api/repositories/ expired and was modified
>>> Making HTTP GET request to http://reviews/api/repositories/1/info/
>>> Cached response for HTTP GET http://reviews/api/repositories/1/info/ expired and was modified
>>> repository info: Path: http://svn/svn/main, Base path: /, Supports changesets: False
>>> Running: svn --non-interactive log --xml -r 11479 -l 1 http://svn/svn/main/
>>> Running: svn --non-interactive info http://svn/svn/main/
>>> Running: diff --version
>>> Running: svn --non-interactive --version -q
>>> repository info: Path: http://svn/svn/main, Base path: /, Supports changesets: False
>>> Running: svn --non-interactive status -q --ignore-externals
>>> Running: svn --non-interactive diff --diff-cmd=diff --notice-ancestry http://svn/svn/main/@11478 http://svn/svn/main/@11479
>>> Running: svn --non-interactive diff --diff-cmd=diff --notice-ancestry http://svn/svn/main/@11478 http://svn/svn/main/@11479 --no-diff-deleted
Traceback (most recent call last):
  File "/usr/local/bin/rbt", line 9, in <module>
    load_entry_point('RBTools==0.7.4', 'console_scripts', 'rbt')()
  File "/usr/local/lib/python2.7/dist-packages/RBTools-0.7.4-py2.7.egg/rbtools/commands/main.py", line 133, in main
    command.run_from_argv([RB_MAIN, command_name] + args)
  File "/usr/local/lib/python2.7/dist-packages/RBTools-0.7.4-py2.7.egg/rbtools/commands/__init__.py", line 612, in run_from_argv
    exit_code = self.main(*args) or 0
  File "/usr/local/lib/python2.7/dist-packages/RBTools-0.7.4-py2.7.egg/rbtools/commands/post.py", line 691, in main
    extra_args=extra_args)
  File "/usr/local/lib/python2.7/dist-packages/RBTools-0.7.4-py2.7.egg/rbtools/clients/svn.py", line 365, in diff
    'diff': b''.join(diff),
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 15: ordinal not in range(128)


Please provide any additional information below.
I tracked this down to rbtools/clients/svn.py line 626 in SVNClient.convert_to_absolute_paths. There, repository_info.base_path is a unicode string (just u'/' in my case). This unicode-ness is then propagated such that the result of convert_to_absolute_paths contains unicode and str. This then leads to the UnicodeDecodeError when the non-unicode strings contain non-ascii characters.