Rename command events, adjust compareRevisions

- Moved the logic for comparing revisions from cooker into command
- Removed 'Cooker' from the event names
- Renamed the 'ExitCode' event into CommandExit, and changed CommandFailed to
  be a subclass of CommandExit

(Bitbake rev: c51ed5d7a9971fad6019dac6c35a71b8a54ab16a)

Signed-off-by: Chris Larson <chris_larson@mentor.com>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

bitbake/lib/bb/ui/depexp.py

@@ -21,6 +21,8 @@ import gobject
 import gtk
 import threading
 import xmlrpclib
+import bb
+import bb.event
 from bb.ui.crumbs.progress import ProgressBar
 
 # Package Model
@@ -236,11 +238,13 @@ def main(server, eventHandler):
                 parse(event._depgraph, dep.pkg_model, dep.depends_model)
                 gtk.gdk.threads_leave()
 
-            if isinstance(event, bb.command.CookerCommandCompleted):
+            if isinstance(event, bb.command.CommandCompleted):
                 continue
-            if isinstance(event, bb.command.CookerCommandFailed):
+            if isinstance(event, bb.command.CommandFailed):
                 print("Command execution failed: %s" % event.error)
-                break
+                return event.exitcode
+            if isinstance(event, bb.command.CommandExit):
+                return event.exitcode
             if isinstance(event, bb.cooker.CookerExit):
                 break