Major rewrite of RCS backends. RCS now represented as a class.

Lots of changes and just one commit.  This started with bug
dac91856-cb6a-4f69-8c03-38ff0b29aab2, when I noticed that new bugs
were not being added appropriately with the Git backend.  I'd been
working with Git trouble before with bug
0cad2ac6-76ef-4a88-abdf-b2e02de76f5c, and decided things would be
better off if I just scrapped the current RCS architecture and went to
a more object oriented setup.  So I did.  It's not clear how to add
support for an RCS backend:
 * Create a new module that
   - defines an inheritor of rsc.RCS, overriding the _rcs_*() methods
   - provide a new() function for instantizating the new class
   - defines an inheritor of rcs.RCStestCase, overiding the Class attribute
   - defines 'suite' a unittest.TestSuite testing the module
 * Add your new module to the rest in rcs._get_matching_rcs()
 * Add your new module to the rest in libbe/tests.py
Although I'm not sure libbe/tests.py is still usefull.

The new framework clears out a bunch of hackery that used to be
involved with supporting becommands/diff.py.  There's still room for
progress though.  While implementing the new verision, I moved the
testing framework over from doctest to a doctest/unittest combination.
Longer tests that don't demonstrate a function's usage should be moved
to unittests at the end of the module, since unittest has better
support for setup/teardown, etc.

The new framework also revealed some underimplented backends, most
notably arch.  These backends have now been fixed.

I also tweaked the test_usage.sh script to run through all the backends
if it is called with no arguments.

The fix for the dac bug turned out to be an unflushed file write :p.

1 files changed, 4 insertions, 5 deletions

diff --git a/becommands/comment.py b/becommands/comment.py
index 5939490..b2dad4e 100644
--- a/becommands/comment.py
+++ b/becommands/comment.py
@@ -15,22 +15,22 @@
 #    along with this program; if not, write to the Free Software
 #    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 """Add a comment to a bug"""
-from libbe import cmdutil, names, utility
+from libbe import cmdutil, utility
 from libbe.bug import new_comment
 import os
 __desc__ = __doc__
 
 def execute(args):
     """
-    >>> from libbe import tests, names
+    >>> from libbe import bugdir
     >>> import os, time
-    >>> dir = tests.simple_bug_dir()
+    >>> dir = bugdir.simple_bug_dir()
     >>> os.chdir(dir.dir)
     >>> execute(["a", "This is a comment about a"])
     >>> comment = dir.get_bug("a").list_comments()[0]
     >>> comment.body
     u'This is a comment about a\\n'
-    >>> comment.From == names.creator()
+    >>> comment.From == dir.rcs.get_user_id()
     True
     >>> comment.time <= int(time.time())
     True
@@ -45,7 +45,6 @@ def execute(args):
     >>> execute(["b"])
     >>> dir.get_bug("b").list_comments()[0].body
     u'I like cheese\\n'
-    >>> tests.clean_up()
     """
     options, args = get_parser().parse_args(args)
     if len(args) < 1: