Fixed libbe.command.diff + ugly BugDir.duplicate_bugdir implementation

duplicate_bugdir() works, but for the vcs backends, it could require
shelling out for _every_ file read.  This could, and probably will, be
horribly slow.  Still it works ;).

I'm not sure what a better implementation would be.  The old
implementation checked out the entire earlier state into a temporary
directory
  pros: single shell out, simple upgrade implementation
  cons: wouldn't work well for HTTP backens

I think a good solution would run along the lines of the currently
commented out code in duplicate_bugdir(), where a
  VersionedStorage.changed_since(revision)
call would give you a list of changed files.  diff could work off of
that directly, without the need to generate a whole duplicate bugdir.
I'm stuck on how to handle upgrades though...

Also removed trailing whitespace from all python files.

1 files changed, 3 insertions, 3 deletions

diff --git a/libbe/command/list.py b/libbe/command/list.py
index 8bdeaae..d48c7ee 100644
--- a/libbe/command/list.py
+++ b/libbe/command/list.py
@@ -25,7 +25,7 @@ import libbe.bug
 import libbe.command
 import libbe.command.util
 
-# get a list of * for cmp_*() comparing two bugs. 
+# get a list of * for cmp_*() comparing two bugs.
 AVAILABLE_CMPS = [fn[4:] for fn in dir(libbe.bug) if fn[:4] == 'cmp_']
 AVAILABLE_CMPS.remove('attr') # a cmp_* template.
 
@@ -129,7 +129,7 @@ class List (libbe.command.Command):
 #        parser.add_option(short, long, action="store_true",
 #                          dest=attr, help=help, default=False)
 #    return parser
-#                
+#
 #                ])
 
     def _run(self, **params):
@@ -144,7 +144,7 @@ class List (libbe.command.Command):
         self.result = bugs
         if len(bugs) == 0 and params['xml'] == False:
             print >> self.stdout, "No matching bugs found"
-    
+
         # sort bugs
         bugs = self._sort_bugs(bugs, cmp_list)